PRAMAC PBI 50K Battery Inverter User Manual

Battery Inverter (PBI)
50K(-PC) / 88K(-PC)
User Manual

PBI 50K Battery Inverter

Product | PBI 50K(-PC) / 88K(-PC)
Do cument No . / Issue | PS- 20039/R E V00
Issue Date | 2023-06
Languages

Copyright
© Pramac Storage Systems GmbH
The reproduction, distribution and utilization of this document as well as the communication of its contents to others without express authorization is prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or design.

Liability
The data specified is only used to describe the product and should not be interpreted as warranted characteristics in the legal sense. The right to change the content of this documentation and the availability of the products are reserved.

Publisher
Pramac Storage Systems GmbH
Marktstraße 185
72793 Pfullingen, GERMANY

About this User Manual

1.1 Scope of this User Manual
This user manual applies to the following products:

• Battery Inverter PBI 50K(-PC) / 88K(-PC)
• ConnectionBox for 50K(-PC) / 88K(-PC)

1.2 Target Group of this User Manual

This user manual is intended for installers, operators, service technicians and plant operators.
This user manual contains basic information, to assemble the product safely and properly, to transport, to put into operation and to operate.
▷ Read this user manual completely and in particular the chapter “Safety and Responsibility”, before you work with the product.

1.3.1 Symbols
1.3.2 Warnings in this User Manual
The following symbols indicate instructions which are intended to make the instructions easier to understand.

Tab. 1: Symbols/sig

Partially conditioned by other prerequisites
1.| Numbered action instruction that is to be executed in the order listed.
2.|
3. ➪| Result of the action instruction.
… > …| Menu sequence in a software that is to be clicked one after the other.

1.3.2 Warnings in this User Manual

Warnings in this user manual indicate an action where there is a risk of personal injury or property damage. Always observe the measures described to avert the danger.
The warnings in this user manual are presented in a box that contains the following information:
SIGNAL WORD/WARNING CATEGORY
Type and source of danger
Consequences of ignoring the warnings.
▸ Measures required to avoid the danger.
DANGER
Leads directly to death or serious personal injury if igno red.
▸ Follow the warnings to avoid death or serious injury!

WARNING
May result in death or serious personal injury if ignored.
▸ Follow the warnings to avoid serious injuries!
CAUTION
May cause minor personal injury if ignored.
▸ Follow the warnings to avoid injury!

NOTICE
Can lead to property damage if ignored.
▸ Follow the warnings to avoid damage or destruction of the product!

Safety and Responsibility

The product has been manufactured in accordance with the generally accepted state of the art. Never the less, there is a risk of personal injury and property damage if you do not observe this chapter and the warnings in this user manual.
▷ Read this user manual thoroughly and completely before using the product.
2.1 Safety Guidelines
Installation, commissioning, and operation of this unit must be carried out by (electrically) qualified person- nel.
▷ Read all technical information and safety instructions before installing and using the product.

2.2 Rules for Safe Installation and Operation

• Do not attempt to install or operate this equipment without proper training.
• Ground the product properly.
• Connect all cables properly.
• Before switching on, check the AC and DC voltages and polarity. Observe the information on the data sheet or type plate.
• Take appropriate precautions to protect against electrostatic discharge (ESD).
• Always be careful around this equipment.
• Never remove the PowerUnit (inverter) cover.
• To ensure safe operation, carry out all work professionally, including transport, storage, assembly, installation and operation.

2.3 Symbols and Warnings on the Product

1. General warning

2. Warning of electrical voltage

3. Warning of hot surface

4. Follow the instructions before use

5. Ground before use

6. Warning of electrical voltage on
   AC and DC side. All strings on the DC side are live

7. Unlock before maintenance or repair

8. Discharge time of 2minutes

9. Warning of a de- vice’s susceptibility to electrostatic discharge

2.4 Designated Use
The PBI 50K(-PC) / 88K(-PC) is a battery inverter for charging or discharging a battery system.
The PBI 50K(-PC) / 88K(-PC) is used to convert alternating current (AC) into direct current (DC) or to convert direct current (DC) into alternating current (AC) connected to a low voltage or medium voltage grid.
The PBI 50K(-PC) / 88K(-PC) complies with protection class IP65 (ConnectionBox: IP54) and can be used indoors and outdoors.
The PBI 50K(-PC) / 88K(-PC) is only intended for use with the corresponding ConnectionBox for the PBI 50K(-PC) / 88K(-PC).

2.5 Requirements for Electricians
The activities described in this user manual require basic knowledge of the electrical system, the associated technical terms and the relevant technical rules. To ensure safe use, these activities may therefore only be carried out by an appropriate specialist or a trained person under the supervision of a specialist.
A skilled person is a person who, on the basis of his professional training, his knowledge and experience as well as his knowledge of the relevant regulations, can assess the work assigned to him, recognize possible dangers and take suitable safety measures.

2.6 General Safety Instructions
▷ Observe the valid regulations for accident preven- tion and environmental protection.
▷ Observe the safety regulations and regulations of the country in which the product is used.
▷ Only use products in technically perfect condition.
▷ Observe all notes on the product.
▷ Persons installing, operating or maintaining products must not be under the influence of drugs or medication.
▷ Use only accessories and spare parts approved by Pramac Storage Systems GmbH in order to exclude a personal hazard due to unsuitable spare parts.
▷ Observe the technical data and ambient conditions specified in the user manual.
▷ Do not put the product into operation until it has been determined that it complies with countryspecific rules, regulations, safety regulations/certificates and application regulations.

2.7 Five Safety Rules When Working on Electrical Systems
Disconnect electrical systems (lock and tag) according to the five safety rules:
▷ Unlock and disconnect completely.
▷ Secure against re-connection.
▷ Check that there is no voltage (DC and AC).
▷ Carry out earthing and short-circuiting.
▷ Provide protection against adjacent live parts.

Technical Description

3.1 Components of the ConnectionBox

3.2 Device Size and Distances

The inverter can be installed vertical or horizontal. If the inverter is installed horizontally outdoors, mount the inverter at an angle of 10°. 3.3 Dimensions 3.4 Communication and Network Management

1. Low or medium voltage grid
2. Power meter
3. Energy flow direction sensor
4. Battery inverter (or inverters)
5. Energy management system
6. Battery (or batteries)
7. Battery management system (or systems)

3.5 Requirements for the Infrastructure

Additional required equipment| at low voltage network| at medium voltage network
---|---|---
DC load break switch| necessary| necessary
AC load break switch| necessary| necessary
Central grid protection device with section switch
(VDE-AR-N 4105, VDE-AR-N 4110)| necessary| necessary
LV-/MV-Transformer| not necessary| necessary

The following points are to be considered when plan-ning the infrastructure:

• The PBI 50K(-PC) / 88K(-PC) can feed into the low- voltage grid and the medium-voltage grid.
• The power supply line must be equipped with an appropriate AC disconnecting device.
• The battery system includes its own monitoring (battery management system) and a circuit breaker with load switching capacity.
• The PBI 50K(-PC) / 88K(-PC) is not equipped with internal potential if solation.
• If connected with the medium-voltagegrid, it must be operated with electrically isolating transformers.
• The transfomer must be selected according to the specific site of use and the relevant regulations must be taken into account: Hazardous substances ordinance, ordinance on installations for handling substances hazardous to water, chemicals prohibition ordinance, technical instructions for noise protection, and regional building regulations.

Specification of medium voltage transformer
Mains transformer according to EN 50588-1

Switching group| Dy(n)5 or Dy(n)11
n = neutral conductor
---|---

Installation

4.1 General Warnings
DANGER

High voltage
Danger to life due to electric shock.
The product operates at high voltages:

▸ All work on the product must be carried out by electrically qualified persons only.
▸ If the inverter is tilted forward on rainy or snowy days or the connection box is opened, take suitable protective measures to prevent water from entering the connection box. If it is not possible to take protective measures, do not tilt the inverter forward or  pen  the connection box.
DANGER

High voltage
Danger to life due to high voltages that can cause lethal electric shocks are present in the live components of the inverter.

▸ Always disconnect the inverter from voltage sources before performing any work on it.
▸ Observe a waiting time of 2 minutes.

DANGER

High voltage
Danger to life due live parts can remain energized after isolation.
▸ Disconnect electrical systems according to the 5 safety rules (see chapter 2.7).

CAUTION

Hot surfaces
Risk of burns due to hot surfaces.
The product can get hot during operation.
▸ Avoid contact during operation.
▸ Allow the product to cool down sufficiently before carrying out any work.

4.2 System and Site Requirements
✔ Take into account the minimum distances around the inverter.
✔ Prolonged exposure to direct sunlight can cause an internal temperature rise, leading to power derating of the device. It is recommended to install a weather protection to mitigate the thermal impact of irradiation.
✔ Install a 200 A fuse as a short-circuit protection element between the battery system and the battery inverter.
✔ If no measures have been taken on the battery side for short-circuit protection, install DC fuses as shortcircuit protection elements between the battery system and the battery inverter and observe the relevant specifications, e.g. according to VDE-AR-E 2510 (see Tab. 12, Technical data).
✔ If the optional function “DC precharging” is not available, install an external precharge unit and a DC switch.
✔ Install the ConnectionBoxes so that the possibly built-in safety switches are freely accessible.

4.3 Auxiliary Means and Tools

• Wrench AF 13 mm
• Wrench AF 17 mm
• Wrench AF 19 mm
• Slotted screwdriver 10 mm
• Lockout-tagout kit
• Voltage tester
• Spirit level

4.4 Unpacking the ConnectionBox

▷ Open the packaging and remove the ConnectionBox with the help of two people.
4.5 Mounting the ConnectionBox

There are three possibilities for mounting the ConnectionBox. Pole mounting with two suitable pole clamps, wall mounting, or horizontal mounting with an angle of 10° (or greater).
The fixing material is not included in the scope of delivery.
4.5.1 Mounting the ConnectionBox Vertically
✔ Local requirements or legal regulations for battery systems were considered in the planning.

1. Mark the drill holes according to the following drawing.
2. Drill the holes and insert anchors.
3. Screw screws with a minimum diameter of 8 mm into the upper plugs at a distance of 8 mm from the mounting surface.
4. Hook the ConnectionBox into the two upper screws and press it against the wall.
5. Screw the lower screws into the dowels.
6. Tighten all screws.

4.5.2 Mounting the ConnectionBox Horizontally
✔ Local requirements or legal regulations for battery systems were considered in the planning.

1. Mount the mounting rails as shown in Figure 8. Ensure that the ConnectionBox has an angle of at least 10°.
   a) Maintain a distance of at least 300 mm from the floor in the connection area (see Figure 5).
   b) To obtain a 10° angle, the distance from the top of the ConnectionBox to the floor is 415 mm.

2. Insert screws with a minimum diameter of 8 mm into the mounting rails.

3. Lift the ConnectionBox with two people and hook it into the two upper screws.

4. Screw on the two upper screws with counter nuts by hand.

5. Lift the ConnectionBox with two persons at the bot- tom and hook it into the two lower screws.

6. Screw on the lower screws with counter nuts by hand.

7. Tighten all screws.

4.5.3 Mounting the ConnectionBox on a Pole
✔ Local requirements or legal regulations for battery systems were considered in the planning.
✔ Two mounting bridges, round steel clamps or mounting rails each permissible for the weight are provided for the mast mounting.
▷ Fixing takes place according to the procedure described in the previous chapters.

4.6 Connect DC and AC Cables
Tab. 2: Stud connection

35 … 185 mm²
Size for lug connection| M12| M10
Tightening torque| 14 … 31 Nm| 10 … 20 Nm
Cable gland| M50| M63
Cable gland diameter| 27 … 35 mm| 34 … 45 mm
Stud size for the PE connection stud and potential equalization| M8
Tightening torque for M8 connecting studs| 10 … 12 Nm
Minimum cross section for the potential equalization| 1 stage smaller than nominal connection cross-section

1. Prepare the cables, grounding cables, and lay it to the connection area.
2. Insert the AC and DC cables individually through the cable glands.
3. Connect the protective earth conductor (PE) (see Fig. 3) and the conductor for potential equalization (see Fig. 9).
4. Connect DC and AC cables to the terminals. It is important to follow that L1-L2-L3 corresponds to a clockwise phase sequence.

4.7 Communication Connections
The PBI 50K(-PC) / 88K(-PC) is equipped with RS485 and Ethernet communication ports for an easy integration into monitoring and control systems.
The RS485 and Ethernet (100BaseT) is mapped on the same RJ45 connectors (RS485/LAN 1…2), located at the lower right corner of the inverter’s back side.
The inverters can be connected in daisy chain, using a single Ethernet cable CAT 5e (or better) between each inverter.

Ethernet

• 2 Ethernet ports integrated for Ethernet daisy chaining.
• Ethernet cable length according to standard maxi- mum 100 m
• When inverter not started, it will pass through the ethernet communication.
• Standard RJ45 plugs and standard crimping tools can be used.
• RJ45 plug is IP65 save even without cable connection.
• Supports line, ring, and star Ethernet topologies.

RS485 / Modbus RT

• RJ45 ports can be used for RS485 communication.
• Daisy-chain for long distance networks or 3rd party datalogger & controls (superordinate EMS control)
• Automatically switches between TCP/IP (Ethernet) and Modbus (RS458) communication.
• Several communication speed available, up to 115 000 bps.
• Communication parameters can be easily set through PBI Connect application.
• Supports RS485 bus (line) topologies.

4.8 Connect RS485/LAN

✔ The cables are fed through the cable gland at the bottom of ConnectionBox, and then connected to the PowerUnits interfaces:

1. Unscrew the cable gland.
2. Thread the screw head of the cable gland into the communication cable.
3. Push the communication cable through the rubber seal until there is sufficient cable to the connectors.
4. Connect the communication cables. Make sure that the communication cable has sufficient strain relief.
5. Screw the cable gland tight by hand.
6. Seal unused openings of the cable gland with the supplied plugs.

Notes:

• The maximum length for the Ethernet connection is 100 m between each two inverters.
• The maximum total length for the RS485 is typically up to 1 000 m.
• You can connect up to 25 inverters for RS485, and up to 25 inverters for each ethernet daisy-chain line.

NOTICE

▸ Only connect the communication cable to the assigned two RJ45 ports with labels “RS485/LAN 1” and “RS485/ LAN 2”. The RJ45 port with label “Digital Input” carries 24 VDC. Connecting any communication cable to this port can damage the inverters and connected equipment.
▸ For RS485 masters (data-loggers, park controllers etc.), only connect the four RS485 Signals to this equipment.
▸ It is recommended to protect communication lines against lightning’s and overvoltage by the means of external Surge Protection devices.

4.9 RJ45 Connector Cabling Tab. 3: Pin assignment

4.10 Setting up the Communication
4.10.1RS485 Network
✔ Assign a unique RS485 address for each inverter in the chain using PBI Connect app between 1 and 31.
The RS485 address is set to 0 when the device is delivered from the factory.
Tab. 4: Protocol types

set to address 1)
5| Multimode USS/Modbus RTU Sunspecn (Standard Setting) (in Multimode, you cannot use USS address 0 and 2)

Tab. 5: RS485 interface settings

4.10.2Ethernet Network
✔ DHCP is activated by default, so each inverter will receive the configuration automatically from the switch or gateway.
✔ If you change the mode to manual, you have to assign an unique IP address, net mask, standard gateway and optionally the DNS server during the PBI Connect commissioning wizard.
✔ Before changed network settings become active, you need to restart the inverter via DC off and DC on.

Tab. 6: IP standard settings

4.10.3Ethernet Direct Connection

✔ In order to use PBI Connect, all inverter can be rea- ched on its permanent fall-back IP address of 169.254.130.30, irrespectively of your PC IP configuation.
Attention: All inverters have the same fallback IP address.

4.11 Connect Remote Off Signal (DRM 0)
The power output of the inverter can be enabled or disabled using the remote shutdown signal (external 24 V voltage signal). Normally, the remote shutdown signal is supplied by a mains protection relay that protects the grid voltage and -frequency is monitored
independently from the inverter. The connection for the remote off signal is located on the adapter board at terminal X5.![PRAMAC PBI 50K Battery Inverter

• adapter board](https://manuals.plus/wp-content/uploads/2024/04/PRAMAC-PBI- 50K-Battery-Inverter-adapter-board.jpg) Tab. 7: Pin assignment X5

Tab. 8: Conductor types and cross-sections

1. Strip the cable by 8 mm before connecting.
2. Connect the cable to the push-in terminal (tool-less, or screw driver 0.4 x 2.5).

NOTICE
▸ The Digital Inputs draws approx. 7 mA. Use a Power supply which can supply sufficient current, depending on the number of inverters connected in parallel.
▸ The standard switch off time is 50 ms. It can be configured to another value.
▸ Configure the function with PBI Connect desktop version or PBI Connect mobile app.

4.12 Testing Electrical Safety
▷ For commissioning, check the ConnectionBox and its connections according to IEC 62446-1.

4.13 Unpacking the PowerUnit
▷ With two persons pull out the PowerUnit by the handles. Make sure that the connection area is not damaged and that the PowerUnit stands stable on the inverter clamps.
▷ If applicable, carefully cut the packaging completely with a cutter knife. Please note that this means that the packaging can no longer be reused. 4.14 Hooking in the PowerUnit
Ensure following conditions prior to hooking in the PowerUnit:

✔ Ambient conditions are dry.
✔ Protective cover of the ConnectionBox is removed.
✔ Unpack the PowerUnit carefully and inspect contact connections on the rear side for any damages.

1. Lift the PowerUnit with the help of 2 people with one hand on the handle and one hand on top of the inverter.
2. Carefully insert the PowerUnit into the device holder of the ConnectionBox as seen in figure 16.
3. One person should hold the PowerUnit in place while the 2nd person should hook the hydraulic rod into the slot in the ConnectionBox (see figure 17). Fig. 17: Hooking hydraulic rod in the recess of the ConnectionBox when mounted verticallyFig. 18: Brace the hydraulic rod in the recess of the ConnectionBox when mounted horizontally
   ➪ Further assembly can be continued by one person.

WARNING

Danger of crushing
Danger of falling of heavy parts
▸ Take further precautions to reduce hazards, e. g. by using personal protective equipment.

4.15 Connecting AC, DC and PE

✔ The electrical systems is disconnected according to the 5 safety rules.
✔ DC switch is turned off (if applicable).
✔ AC switch is turned off.
▷ Press the plug latching and insert the plug into the connector socks, until it makes a clicking noise.
a)Start with the connecting of protective earth (PE, green/yellow).
b)Connect the AC and DC lines according to their markings (DC-, DC+, L1, L2, and L3) on the ConnectionBox to the inverter.
It is important to follow that L1-L2-L3 corresponds to a clockwise phase sequence. c) Connect the Ethernet cable of the ConnectionBox adapter board (X6) to the digital input of the PowerUnit (Digital Input/DRM 0).
d)Make sure that the plugs are engaged.

4.16 Closing and Fixing the PowerUnit

1. Carefully press the PowerUnit in its intended place and hold it. Make sure that the cables are not pinched or damaged when closing.
2. Tighten the M8 screws hand-tight.
3. Tighten all four M8 bolts crosswise with a tightening torque of 20 Nm.

Commissioning

5.1 Before Startup
✔ The first commissioning is based on the locally applicable installation regulations.
▷ Check the polarity of each battery string connected.
▷ Check the maximum voltage of each battery string connected.
▷ Check the AC voltage.

NOTICE
Property damage
▸ Before the DC side is switched on, inverters of device type 420P must be pre-charged. The recommended precharge resistor can be found in the technical data (see page 34).

5.2 Startup
▷ Switch on the AC circuit breaker, if applicable.
▷ Switch on the DC circuit breaker, if applicable.
When activated, the PBI 50K(-PC) / 88K(-PC) completes the following steps.

1. Internal tests (i.e. relais test).
2. Check the connection conditions for the AC grid and the battery (DC) voltage.
3. PBI 50K(-PC) / 88K(-PC) starts operation.

On: DC voltage sufficient; ready for feeding
Fast flashing: DC power not sufficient
Slow flashing: DC voltage is too high or too low
Off: No DC voltage
| GRID indicator (AC)
On: AC grid is ok
Fast flashing: Inverter is in the activation state
Slow flashing: AC grid check in progress
Off: AC grid not connected
| Bluetooth key
On: Connected
Slow flashing: Ready for Connection
Fast flashing: Connecting
Off: No connection
| FAULT indicator
On: Inverterin error state and not feeding in
Flashing: User-off mode
Off: No error
| CLEAR key
▸ To acknowledge an error, press the key briefly (less than 5 seconds).
▸ Press and hold the key for more than 5 seconds to enable or disable user clearance (test mode). When the mode is active, the Clear key and Fault indi cator flash rapidly at the same time.
Update state| The FAULT indicator is permanently on, the GRID and BATTERY indicators flash alter-nately.
Initialization state| Right and left indicators flash alternately during startup.
State “No Grid Code selected“| The FAULT indicator is permanently off, the GRID and BATTERY indicators flash alter-nately.

5.3 Configuring Inverters with the Mobile App PBI Connect
With the mobile app PBI Connect for iOS or Android platforms, all necessary settings can be made.
At the first start-up of the inverter, PBI Connect will show the initial inverter setup screen for these set- tings:

• Country of installation
• Grid code (if more than one for the selected country)
• Nominal Grid voltage

Optional settings:

• Permanent Power limitation
• Remote Stop Signal
• Network settings RS485
• Network settings Ethernet

PBI Connect also offers more functionality like error log file, performance data diagrams and extended settings.

NOTICE
▸ For certain settings, you need a personal password, which is provided from Pramac Storage Systems GmbH on request.
✔ PBI Connect is installed on your mobile device. PBI Connect is available on the Apple’s App Store for iOS devices and on Google‘s Play app for Android devices.
✔ GPS and Bluetooth is active and permissions set for the App

1. Switch on the AC circuit breaker, if applicable.
2. Turn on your mobile Bluetooth and GPS mode.
3. Start the PBI Connect app on your mobile device.
4. Press the Bluetooth button on the PowerUnit‘s display panel.
   ➪ PowerUnit is paired automatically and shown in the PBI Connect app. Bluetooth button illuminates blue

5.4 Configuring Inverters with the PBI Connect PC Software

With the PC software PBI Connect, firmware updates can be carried out and country-specific inverter parameters can be set. The connection between PC and inverter can be established via Ethernet or USB (via a USB-RS485 converter).
Functions

• Firmware update
• Export of inverter data
• Feed-in conditions voltage and frequency
• Ramp starting time in the event of a grid error
• Average voltage monitoring
• hase conductor voltage monitoring
• Frequency-dependent power reduction
• Actual voltage monitoring (rapid disconnection)
• Actual frequency monitoring
• Reactive power (cos φ)
• Power-up time
• K factor (fault ride through)

In the 421P product variant, in contrast, the 24 V supply is additionally provided via the AC mains. When the booting is completed, the inverter is in stand-by mode.
In order to start charging or discharging of the battery, the operation mode has to be set: start, stop, enter standby, exit standby.
▷ Set the operationg state with PCSSetOperation.Green fields is operation status which can be used by the external control.
Green numbers indicate the “PCSSetOperation” register.
For details, please refer to the seperate available document “Operating the Pramac Battery Inverter”.
In order to control the charging / discharging state set the required value in the field WMaxLimPct. + values indicate discharging and – values charging. Values are to be entered as a percentage of the full power. After entering the percentage set the parameter WMax- Lim_Ena to 1 to enable.
Tab. 10: PCSSetOperation;
Sunspec Model No. 64800, Offset: 7
Pramac Parameter No. 991

Tab. 11: Inverter Status (St) (read only) Sunspec Model No. 103, Offset: 38

and the relays are open. (other conditions: Initi-alizing, Update, NoCountry selected)
STARTING| 3| The inverter is connecting to the grid.
THROTTLED| 5| The inverter is in operation with an active derating function. The IGBTs are active and the AC relays are closed.
FAULT| 7| The inverter is in fault state. The IGBTs are locked and the AC relays are open.
STANDBY| 8| The inverter is in fault state. The IGBTs are locked and the AC relays are open.
STARTED| 9| The inverter is connected to the AC grid.
The IGBTs are locked and the AC relays are closed.

Technical Data

7.1 PowerUnit
Tab. 12: Technical data PBI 50K(-PC) / 88K(-PC)

| PBI 88K| PBI 50K
---|---|---
DC DATA
Operation mode| 88 kVA @ 400 VAC| 50 kVA @ 400 VAC| 2nd life application
Article no.
Article no. (with integrated DC precharge )| 420P088 421P100| 420P050 421P050
Maximum voltage DC| 1 000 V
Nominal voltage DC| 620 V| 620 V| Udc + 50
DC voltage range at nominal power| 585 … 900 V| 585 … 900 V| 1.46 x Uac
DC start-up open circuit voltage (charging)| 585 V| 585 V| 1.46 x Uac
Max. operational current DC| 155 A| 155 A| 155 A
DC connection PowerUnit-to-ConnectionBox| 1 plus, 1 minus: Connector with button activated coupling
AC DATA
Apparent power| 88 kVA| 50 kVA| 0.222 x Uac
Rated voltage 3-phase, Uac| 400 V| 400 V| 180 … 400 V
Voltage range AC| 180 … 528 V
| PBI 88K| PBI 50K
---|---|---
AC grid connection / grid types| 3-phases, PE / TT, TN-C, TN-C-S, TN-S
Nominal power factor / range| 1 / 0.3i … 0.3c
Rated frequency| 50, 60 Hz
Frequency range| 45 … 65 Hz
Maximum AC current, Imax| 128 A
Maximum AC short circuit current| 64 A rms (3 period average)
Inrush current (peak / duration)| 25 A / 0.5 ms
Maximum THD| <3 %
Maximum efficiency| 98.6 %| 98.4 %| 96.8 %
Maximum admissible external AC fuse| 160 A, gG, Un = 500 V
Maximum permissible DC fuse| 200 A, gR, Un = 1 000 V
Peak current, Ip / initial short circuit current, Ik“ according to IEC 60690-0| 128 A / 325 A
AC connection PowerUnit-to-ConnectionBox| Connector with button activated coupling
| PBI 88K| PBI 50K
---|---|---
AMBIENT CONDITIONS
Cooling| Smart active cooling
Max. temperature for nominal power| 45 °C
Ambient temperature| -25 … +60 °C
Relative air humidity| 0… 100%
Maximum elevation, above sea level| 3 000 m
Noise level| < 70 dBA
Environment classification (IEC 60721-3-4)| 4K4H
Type of protection PowerUnit (IEC 60529)| IP65
Installation type| indoor, cabinet, outdoor, vertical / horizontal / pole mounting
PROTECTION FUNCTIONS
Grid monitoring| voltage, frequency, passive and active anti-islanding, DC injection
Grid separation| gate block / redundant grid relays
Residual current monitoring (RCD)| Type 2
Compatibility external RCD| Type A / Type B
Protection class (IEC 62109)| 1
Overvoltage category (IEC 60664-1)| DC: II / AC: III
DC precharge| 420P: no (external required) / 421P: yes (integrated)
| PBI 88K| PBI 50K
---|---|---
GENERAL DATA
Topology| transformerless
DC pole grounding| not allowed
Status display / keys| 4 LED’s (DC status, AC status, Fault, Bluetooth®) / 2 keys (Connect, Clear)
Interfaces| 2 × Ethernet daisy-chain / 2 × RS485, Bluetooth® BLE, 1 x remote off signal
Communication Protocols| Sunspec (Modbus TCP, Modbus RTU), USS (Ethernet, RS485)
Dimensions PowerUnit W x H x D| 673 × 626 × 321 mm
Weight PowerUnit| 69 kg
CERTIFICATES| All certificates are available at  www.pramac-storage- systems.com
EU Directive| 2014/30/EU, 2014/35/EU
Product| IEC 62109-1, IEC 62109-2, IEC 62116, IEC 61727, IEC 62477-1, IEC 61439-2, ETSI EN 300 328 V.2.1.1
EMC| IEC 61000-6-2, IEC 61000-6-4
Environment| IEC 60068-2-1, -2-2, -2-30, -2-78, -2-14, -2-6, -2-27, -3-2, -2-75, IEC 60529, IEC 60034-9
Grid Codes| DIN VDE V 0126-1-1, VDE-AR-N 4105:2018-11, VDE-AR-N 4110:2018-11, TOR D4, Önorm E 8001-4-712, UTE C15-712-1, EN 50549-1/-2

7.2 ConnectionBox
Tab. 13: Technical Data ConnectionBox

mm2)
Rated AC voltage| 180 to 400 V
Max. AC current| 128 A
AC connection L1, L2, L3, PE| Connection terminals L1, L2, L3: M10, PE: M8, for ring cable lugs (50 … 150 mm2)
Protection class (IEC 60529)| IP54
Dimensions W × H × D| 750 × 692 × 166 mm
Weight| 25 kg

7.3 External DC Precharge (only required for 420P)
Tab. 14: Technical Data external DC precharge for 420P

Single Line Diagrams

8.1 Battery Inverter without DC-Precharging

8.2 Battery Inverter with DC-Precharging![PRAMAC PBI 50K Battery Inverter

• DC-Precharging 1](https://manuals.plus/wp-content/uploads/2024/04/PRAMAC- PBI-50K-Battery-Inverter-DC-Precharging-1.jpg) 8.3 Battery Inverter 50K(-PC) / 88K(-PC) with ConnectionBox

8.4 System

8.5 Temperature Derating

8.6 Efficiency

Maintenance

The maintenance intervals are manufacturer’s recommendations, which may have to be shortened due to extreme environmental conditions.
9.1 General Warnings
DANGER

High voltage
Danger to life due to electric shock.
The product operates at high voltages:
▸ All work on the product must be carried out by electrically qualified persons only.
▸ If the PowerUnit is tilted forward on rainy or snowy days or the connection box is opened, take suitable protective measures to prevent water from entering the connection box. If it is not possible to take protective measures, do not tilt the PowerUnit forward or open the connection box.
DANGER
High voltage
Danger to life due to high voltages that can cause lethal electric shocks are present in the live components of the PowerUnit.
▸ Always disconnect the PowerUnit from voltage sources before performing any work on it.
▸ Observe a waiting time of 2 minutes

DANGER
High voltage
Danger to life due live parts can remain energized after isolation.
▸ Disconnect electrical systems according to the 5 safety rules (see chapter 2.7).

CAUTION
Hot surfaces
Risk of burns due to hot surfaces.
The product can get hot during operation.
▸ Avoid contact during operation.
▸ Allow the product to cool down sufficiently before carrying out any work.

9.2 Replacement
9.2.1 Replacing the PowerUnit Fans

The fan can be easy replaced without opening the PowerUnit.
✔ Electrical systems are disconnected according to the 5 safety rules.

1. Loosen the 2 screws of the fan plate.
2. Remove the fan plate from the PowerUnit.
3. Remove the plug connectors.
4. Connect the new fan plate to the PowerUnit using the connectors.
5. Tighten the 2 new fan plate screws crosswise with a tightening torque of 0.6 Nm.
6. Check fans for function.

9.2.2 Replacing the ConnectionBox Fan
✔ Electrical systems are disconnected according to the 5 safety rules.

1. Loosen the 4 PowerUnit fixing screws. Make sure that the PowerUnit is pressed slightly in the direc tion of the ConnectionBox when the last screw is loosened.
2. Slowly pull the PowerUnit into the opposite direction. Make sure that the hydraulic rod is hooked in the ConnectionBox.
3. Lift the PowerUnit with the help of 2 people with one hand on the handle and one hand on top of the inverter.
4. Place the PowerUnit carefully on a dry and clean surface.
5. Remove the four expanding rivets of the ConnectionBox fan with suitable tools.
6. Pinch off both cable ties on the ConnectionBox rear wall.
7. Remove the plug connector to the adapter board and remove the defective fan.
8. Mount the new ConnectionBox fan with four new expanding rivets (4 x 9 mm). Pay attention to the orientation of the power supply cable.
9. Use two cable ties to secure the supply, Ethernet and sensor cables to the rear of the ConnectionBox.
10. Plug the supply cable of the ConnectionBox fan into the adapter board.
11. Lift the PowerUnit with the help of 2 people with one hand on the handle and one hand on top of the inverter.
12. Carefully insert the PowerUnit into the device hol- der of the ConnectionBox.
13. Check fan for function.
14. Carefully press the PowerUnit in its intended place and hold it. Make sure that the cables are not pin- ched or damaged when closing.
15. Tighten the M8 screws hand-tight.
16. Tighten all four M8 bolts crosswise with a tightening torque of 20 Nm.

9.2.3 Replacing the Sealing Gasket of the ConnectionBox
✔ Electrical systems are disconnected according to the 5 safety rules.

1. Loosen the 4 PowerUnit fixing screws. Make sure that the PowerUnit is pressed slightly in the direc-tion of the ConnectionBox when the last screw is loosened.
2. Slowly pull the PowerUnit into the opposite direc- tion. Make sure that the hydraulic rod is hooked in the ConnectionBox.
3. Replace the sealing gasket with a new one.
4. Carefully press the PowerUnit in its intended place and hold it. Make sure that the cables are not pin- ched or damaged when closing.
5. Tighten the M8 screws hand-tight.
6. Tighten all four M8 bolts crosswise with a tightening torque of 20 Nm.

9.3 Periodicity of Maintenance

Activities to be performed

Visual inspection of the heat sink and if necessary cleaning (after air outlet plate has been dismantled).| 12 months
Checking the interior of the ConnectionBox for dust deposits, dirt, moisture and water ingress from the outside.| 5 years
Checking the PowerUnit fans for function and operating noise.| 12 months
Checking the ConnectionBox fan for function and operating noise.| 12 months
Checking the surge protection device (AC and DC side) and the external fuses for damage.| 12 months
Checking the strength of the clamping connections of the power cables and re- tighten if necessary. Pay attention to discoloration/ changes on the insulation and terminals. Replace damaged or corroded cable connections or contact elements.| 12 months
Function test of the insulation monitoring.| 12 months
Checking AC and DC voltages.| 12 months
Checking starting behavior.| 12 months
Checking the display panel or LEDs for function.| 12 months
For the 421P series: Test of the microfuses of the 24 V supply voltage. Open the DC switch and
check the display panel function.| 12 months
Checking warning notices (stickers) and if necessary replace the stickers| 12 months
Documenting the operating environment and the device with a camera.| 12 months
Visual inspection of the operating conditions.
Check minimum distance (2 m) to surrounding shrubs, hedges etc.| 12 months
Replacing the device fans, if fans are indicated as defect.| 8 years*

• Shorter maintenance intervals may be required (depending on location and ambient conditions)

Disposal

Dispose of the packaging and replaced parts according to the rules applicable in the country where the product is installed. Do not dispose the Battery Inverter in normal domestic waste. The Battery Inverter conforms to RoHS.
▷ Pramac Storage Systems GmbH takes the product back completely. Please contact the Pramac Service team.

Troubleshooting

11.1 Error List

Connect.
▸Check the installation of the inverter.
▸Check PE connection.
▸Check for faulty cables (e.g. damaged insulation).
▸Check the electrical system installation.
70004| Safety Relay Broken| The selftest of the safety relays could not be completed successfully.| ▸Open and close the DC switch.
▸If this error occurs more than once, contact Pramac Service.
70005| Relay Test Bad Comm1| The selftest of the safety relays detected a communication problem.
70006| Relay Test Bad Comm2
70007| Relay Test Bad Comm3
70008| Relay Test Bad Comm4
90006| Grid overvoltage| At least one grid phase exceeds the configured overvoltage limit value for the configured duration.| ▸Measure the voltage of all three phases with PBI Connect and a True-RMS meter.
▸Check the configured voltage limit and the con- figured nominal voltage.
90007| Grid undervoltage| At least one grid phase falls below the confi- gured undervoltage limit value for the confi- gured duration.
90008| Overfrequency| The grid frequency exceeds the configured li- mit value for the configured duration.| ▸Measure the voltage of all three phases with PBI Connect and a True-RMS meter.
▸Check the configured frequency limit and the configured nominal frequency.
90009| Underfrequency| The grid frequency falls below the configured limit value for the configured duration.
9000B| DC link 1| The device has disconnected from the grid due to an imbalance in the internal DC voltage and is switched on again briefly.| ▸If this error occurs more than once, contact Pramac Service.
90011| DC link 6| The device has disconnected from the grid due to a DC overvoltage in the input of the in- verter. As soon as the measured open- circuit voltage is below the permitted limit value, the device switches on again automatically.| ▸Check the DC voltage of the electrical system.
The voltage must be below 1 000 VDC for con- nection. The maximum DC open circuit voltage must not exceed 1 100 VDC.
90013| RCD Fail| The all-current sensitive residual current measurement has measured a relative or absolute exceedance of the setlimit value.| ▸Check measured value or limit value in PBI Connect.
▸Check the installation of the inverter.
▸Check PE connection.
▸Check for faulty cables (e.g. damaged insulation).
▸Check the electrical system installation.
90020| Initialisation C1| The system initialization has not been com- pleted successfully.| ▸Update the device if a new firmware version exists.
▸If the error persists, please contact Pramac Ser- vice.
90021| Initialisation C0
90024| SR parameter error| The device parameterization was not loaded during system initialization.
90028| Update Start| Operation of the inverter has been interrup- ted to perform a firmware update. The device restarts automatically after a successful up- date.| ▸Wait until the update process is complete.
90029| Update fault| An error occurred repeatedly during the firmware update.| ▸Download the correct firmware package again from the manufacturer’s website and restart the update.”
▸If the error persists, please contact Pramac Service.
9002A| Keep Alive| Internal communication is disrupted. The device is restarted automatically.| ▸If the error persists, please contact Pramac Service.
9002B| Update End| The firmware update was successfully com- pleted.| For information only.
9002D| AntiIslandRocof| An island network was identified using the ROCOF method. The device disconnects from the grid and restarts automatically after 30 s under normal grid conditions.| ▸Check the grid connection and measure the voltages with a True RMS meter.
9002E| AntiIsland Active| An island network was detected using the ac- tive method. The device disconnects from the grid and restarts automatically after 30 s un- der normal grid conditions.
9002F| FFS is read-only| The internal data storage is not possible due to a flash error.| ▸Please contact Pramac Service.
90030| DC share too high| The measured DC-Part in AC current exceed the defined limit.
90031| ETH link lost| The Ethernet connection was interrupted.| ▸Check all Ethernet cables in the system (on the inverter, router, switch, etc.) for correct connec- tion and damage.
90032| Restart| A notice that the system is restarted.| ▸If these instructions occur more frequently in daily operation, please contact Pramac Ser- vice.
90034| DC share too high| The measured DC component in the AC current is above the configured limit value. The device restarts automatically.| ▸Please contact Pramac Service.
90050| AC condition| The AC switch-on condition has not yet been fulfilled (mains frequency, AC voltage).| ▸Wait until the network is stable.
90051| DC condition| The DC switch-on condition not yet fulfilled (DC voltage).| ▸Wait until the DC voltage is sufficient.
90052| User lock active| The user lock is active.| ▸Deactivate the user lock by pressing the “Clear”key for at least 5 s.
90054| Overvoltage 2| The mean grid voltage is above the configured limit value of the voltage mean value monitoring.| ▸Measure the voltage of all three phases with PBI Connect and a True-RMS meter.
▸Check the configured voltage average and the configured nominal voltage.
90055| Grid overvoltage| The phase phase voltage exceeds the configured limit value for the configured duration.| ▸Measure the voltage of all three phases with PBI Connect and a True-RMS meter.
▸Check the configured voltage limit and the con- figured nominal voltage.
90056| Grid undervoltage| The phase phase voltage falls below the configured limit value for the configured duration.
90057| Watchdog C0| The internal firmware protection function has been triggered.| ▸Please contact Pramac Service.
90058| Watchdog C1
90059| LT Firmware| The LT/safety processor firmware is defective.| ▸Download the correct firmware package again from the manufacturer’s website and restart the update.
▸If the error persists, please contact Pramac Service.
90061| Update fault| –| No action necessary.
90062| Fault ride through| Indication of instabilities in the network, which must be passed through according to different country regulations.
90071| DFLASH Fixed| –
90072| DFLASH Reset| The device has lost important configuration parameters.| ▸Please contact Pramac Service.
90073| Test Info| –| No action necessary.
90074| Test Noti| –
90075| Test Temp Noti| –
90082| HW VPos feeding| The hardware protection has detected an impermissible overvoltage in the positive DC link.| ▸Check DC voltage for permissible range.
90083| HW VNeg feeding| The hardware protection has detected an impermissible overvoltage in the negative DC link.
90084| HW PowNok feeding| The hardware protection has detected a problem in the power supply of the switches.| ▸Open and close the DC switch.
▸If error occurs more than once, contact Pramac Service.
90085| HW DcUnsy feeding| The hardware protection has detected an impermissible asymmetry in the DC link.
90086| HW driver feeding| The hardware protection has detected a problem in the circuit breaker driver.
90087| HW overcurrent L1| The hardware protection has detected an impermissible overcurrent in L1, L2, or L3.
90088| HW overcurrent L2
90089| HW overcurrent L3
9008A| IGBT overtempera- ture| The temperature of the IGBT’s exceeds the permissible limit value.| ▸Do not run the inverter at full load at high ambient temperatures.
9008C| HW error feeding| The hardware protection has detected a ge- neral error.| ▸ If error occurs more than once, contact Pramac Service.
9008D| HeartBeat Protection| An internal communication problem has been identified. This leads to grid disconnection of the device and subsequent restart.
9008E| ComTimeout Error
9008F| ComTimeout Running
90090| ComTimeout ParamInit
90091| HeartBeat Safety
90092| Under Freq Safety| The grid frequency falls below the configured limit value for the configured time.| ▸Measure the frequency of all three phases with PBI Connect and a True RMS meter
▸Check the configured frequency limit and the configured nominal frequency.
90093| Over Freq Safety| The grid frequency exceeds the configured limit value for the configured time.
90094| Under Volt Safety| The grid voltage falls below the configured limit value for the configured time.| ▸Measure the voltage of all three phases with PBI Connect and a True RMS meter
▸Check the configured voltage limit and the configured nominal voltage.
90095| Over Volt Safety| The grid voltage exceeds the configured limit value for the configured time.
90096| Safety Test Noting| –| No action necessary.
90097| Safety general| There is a problem with the safety processor.| ▸Please contact Pramac Service.
90098| Safey unknown
90099| Safety APP NOK
9009A| Watchdog safety
9009B| Safety not running
9009C| Safety unknown state
9009D| SafetyParamInit NOK
9009E| Safety APP start NOK
9009F| Safety APP reset NOK
900A0| Safety Error timeout
900A1| Safety UpdateSpecial
900A2| SMS island detected| An island network was detected using the SMS method. The device disconnects from the grid and restarts automatically after 30 s under normal grid conditions.| ▸Measure the voltage of all three phases with PBI Connect and a True-RMS meter
▸Check the configured voltage limit and the con- figured nominal voltage.
900A3| SafetyRelay 1 broken| The safety relay L1 is jammed.| ▸Please contact Pramac Service.
900A4| SafetyRelay 2 broken| The safety relay L2 is jammed.
900A5| SafetyRelay 3 broken| The safety relay L3 is jammed.
900A6| MainRelay 1 broken| The safety relay L1 is jammed.
900A7| MainRelay 2 broken| The safety relay L2 is jammed.
900A8| MainRelay 3 broken| The safety relay L3 is jammed.
900AA| External FAN NOK| The external fans do not work. The device au- tomatically limits its power to keep the tem- perature of the device within a safe range.| ▸Replace the external fans according to the manual.
900AB| Internal FAN NOK| The internal fan does not work. The device automatically limits its power to keep the temperature of the device within a safe range.| ▸Please contact Pramac Service.
900AC| Systemstart info| –| No action necessary.
A017D| Phase defect| The actual current value deviates from the set current value.| ▸Please contact Pramac Service.
A017E| HW error activation| General hardware shutdown by the inverter during the activation phase. This error should be corrected automatically.| ▸ If error occurs more than once, contact Pramac Service.
A017F| HW VPos activation| The hardware protection has detected an impermissible overvoltage in the positive DC link during the activation phase.| ▸Check DC voltage for permissible range.
A0180| HW VNeg activation| The hardware protection has detected an impermissible overvoltage in the negative DC link during the activation phase.
A0181| HW PowNok activati- on| The hardware protection has detected a problem with the circuit-breakers during the ac- tivation phase.| ▸ If error occurs more than once, contact Pramac Service.
A0182| HW DcUnsy activati- on| The hardware protection has detected an impermissible asymmetry in the DC link during the activation phase.| ▸Open and close the DC switch.
▸If this error occurs more than once, contact Pra- mac Service.
A0183| HW driver activation| The hardware protection has detected a problem in the circuit breaker driver during the activation phase.
A0184| HW I L1 activation| The hardware protection has detected an impermissible overcurrent in L1, L2, or L3 du- ring the activation phase.
A0185| HW I L2 activation
A0186| HW I L3 activation
A0187| HW error PreActiv| The hardware protection has detected a general error before the activation phase.| ▸ If error occurs more than once, contact Pramac Service.
A0188| HW VPos PreActiv| The hardware protection has detected an impermissible overvoltage in the positive DC link before the activation phase.| ▸Check DC voltage for permissible range.
A0189| HW VNeg PreActiv| The hardware protection has detected an impermissible overvoltage in the negative DC link before the activation phase.
A018A| HW PowNok PreActiv| The hardware protection has detected a problem with the circuit-breakers before the ac- tivation phase.| ▸ If error occurs more than once, contact Pramac Service.
A018B| HW DcUnsy PreActiv| The hardware protection has detected an impermissible asymmetry in the DC link before the activation phase.| ▸Open and close the DC switch.
▸If this error occurs more than once, contact Pramac Service.
A018C| HW driver PreActiv| The hardware protection has detected a problem in the circuit breaker driver before the activation phase.
A018D| HW I L1 PreActiv| The hardware protection has detected an im- permissible overcurrent in L1, L2, or L3 befo- re the activation phase.| ▸Open and close the DC switch.
▸If this error occurs more than once, contact Pra- mac Service.
A018E| HW I L2 PreActiv
A018F| HW I L3 PreActiv
A0190| Duty NOK| –| No action necessary.
A0191| RCD Selftest NOK| The selftest of the all-current sensitive residual current monitoring failed.| ▸Please contact Pramac Service.
A0192| DCPrecharge under U| DC input voltage is too low for the precharge process.| ▸Check connections.
▸Open DC switch.
A0193| DCPrecharge NOK| Temporary failure: The DC precharge is incomplete.| ▸Open and close AC and DC switches.
▸If the error still occurs, contact Pramac Service.
A0194| DCPrecharge warning| Temporary failure: The DC precharge is incomplete.| ▸ Contact Pramac Service.
A0195| DCPrecharge fault| A hardware defect could be present.| ▸Open the AC and DC switches to disconnect the unit from power supply.
▸If the error still occurs, contact Pramac Service.

A0196

| DC voltage too high| The unit was shut down after the DC input voltage exceeded the unit’s rated voltage.| ▸Measure DC voltage.
▸Set the DC voltage value indicated on the type la- bel.
▸Acknowledge the error.
A0197| DC Overvoltage| DC overvoltage occurred.| ▸Measure DC voltage.
▸Set the DC voltage value indicated on the type la- bel.
A0198| DC asymmetry| DC voltage unbalanced.| No action necessary.
A0199| DC voltage jump| An unacceptable DC voltage peak has occur- red. The unit is in a safe mode for a short time to prevent damage to property.| No action necessary.
A019A| DC part timeout| Timeout in DC part component monitoring occurred.| No action necessary.
▸If the error still occurs, contact Pramac Service.

© Pramac Storage Systems GmbH
The reproduction, distribution and utilization of this document as well as the communication of its contents to others without express authorization is prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or design.
The data specified is only used to describe the product and should not be interpreted as warranted characteristics in the legal sense.
The right to change the content of this documentation and the availability of the products are reserved.

Pramac Storage Systems GmbH
Marktstraße 185
72793 Pfullingen, GERMANY
✆ +49 (0)7121-159-77-0
✉ info.pss@pramac.com
✉ service.pss@pramac.com
www.pramac-storage-systems.com

References

• TEMS Suite – Mobile Network Testing | Infovista
• Pramac Storage Systems GmbH – Innovative Energiespeichersysteme und Wechselrichter für die intelligente Speicherung von Energie

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