KOSTAL KEM-P Series P Energy Meter Instruction Manual
- June 8, 2024
- KOSTAL
Table of Contents
KOSTAL KEM-P Series P Energy Meter Instruction Manual
Installation instructions for multi-functional measuring device with Modbus RTU interface and direct measure- ment
These instructions form a key part of the product. They must be consulted when installing the energy meter. These instructions must be kept in perfect condition and stored in a clean place easily accessible to the operator
Read the installation instructions in full. Follow the installation
instructions, otherwise the intended level of protection may be compromised!
You will find more information in the data sheet available at
kostal-solar-electric.com/download.
Safety notices and warnings
The “attention sign” printed on the device means:
- Installation, operation and maintenance should be carried out by a specialist qualified in electrical engineering. Follo the installation instructions provided. Observe the rules and safety regulations (including national safety regulations) applicable to setup and operation as well as recognised good engineering practice.
- Use an appropriate voltage measuring device to make sure that there is no voltage present.
- Install the device in accordance with the instructions provided in the installation instructions. Accessing the circuits inside the device is not permitted.
- The measuring device is maintenance-free. Repairs may only be carried out by the manufacturer.
- Only clean the device with a suitable damp cloth. Do not use abrasives or solvents and switch off the device before cleaning.
- Make sure that all terminals are correctly connected in order to avoid damage to the device.
- Observe the maximum permissible voltage (480 V AC relative phase or 276 V AC relative neutral conductor) and grid frequency (50 Hz).
Brief description
This device is a digital three-phase energy measuring device, suitable for measuring active power through a direct measurement in power grids of no more than 480 V / 100 A, with 2 pulse outputs, an RS485 interface and an operating temperature range of up to +70 °C.
Controls and display elements
- LCD
- L1, L2, L3, neutral conductor input
- Modbus interface
- U/I, left/ESC key
- Hz/PF MD, up key
- P, down key
- E, right/enter key
- Pulse LED
- L1, L2, L3, neutral conductor output
Installation
Mounting
The device is latched onto a mounting rail in the control cabinet. It can be
installed in any position provided that the LCD can still be read.
Connection assignment
B, A, G :RS485 (-, +, GND)
Grid types
The device is certified with the grid type: 4-wire connection, 3-phase
measurements
RS485 interface
The RS485 interface is used for local networking with the Modbus RTU protocol.
The maximum length is 30 m at 38400 bit/s
Factory settings:
Address:1
Baud rate:38400 bit/s
Data bit:8
Parity:None
Stop bit:2
Installation
- Fit KEM on DIN rail.
- Open connection covers.
- Connect mains cables (AC).
- Connect the RS485 interface to the inverter.
- Close connection covers.
- Switch on the power supply and check that the device is working properly
Configuration
The energy meter is pre-configured in the factory for use with a KOSTAL
inverter. No further settings are needed or possible. For details of the
combinations in which the energy meter can be used, consult the document
“Released energy meters” which is available in the download area for the
inverter.
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Disposal
This product must be disposed of by an appropriate recycling service recognised by the government or local public authorities. Correct disposal and recycling help to prevent potential harmful consequences to the environment and peopl
Customer service and warranty
In the event of malfunctions or failure, or should you require information or wish to purchase additional modules, please contact KOSTAL Solar Electric GmbH or the dealer in the country in which the device is installed.
If the energy meter is installed or operated in a manner other than
that described in these instructions, the warranty shall cease to apply
Technical data
Measurement input
Input voltage range| 3x 184 V … 276 V(320 V … 480 V)
Power consumption| 10 VA (2W)
Frequency range| 50 Hz
Active energy (IEC 62053-21)| Class 1
Reactive energy (IEC 62053-23)| Class 2
Communication interface
Communication standard| RS485
Range of transmission rate| 38400 bit/s
General data
Dimensions W / H / D| 72 x 100 x 66 mm
Ambient temperature (operation)| -40 °C to 70 °C
Ambient temperature (storage/transport)| -40 °C to 70 °C
Max. permissible air humidity (operation)| 90 %
Connection data
Measurement connection| Screw connection
Conductor cross-section, rigid/flexible/AWG| 4 mm² … 25 mm²
Other connections| Screw connection
Conductor cross-section, rigid/flexible/AWG| 0.5 mm²…… 1.5 mm²
Conformity / approvals| CE-compliant
Standards/rules| EN 61326-1:2013