POWER SOLID PSi1000VAT48VK Telecom Inverter User Manual

POWER SOLID PSi1000VAT48VK Telecom Inverter

Product Information

The product is a power supply instrument that can provide high-performance uninterrupted AC power for various precision instruments. The instrument has the following characteristics and functions:

• The temperature drop is about 20°C
• Overload protection: The inverter will stop inversion and turn to bypass output, sending out sound-light alarm as overload for period of time. Once the load resume to normal, the inverter will turn to inversion output automatically. The overload protection drop is about 10%.

The instrument has dangerous high voltages in both input and output, which may endanger the safety of life. It is important to strictly follow the operating description and not remove the cover of the instrument. It is also necessary to keep the instrument connected to the ground before connecting the instrument. There are several precautions that need to be taken while using the instrument to ensure safety.

Product Usage Instructions

1. Read the user manual carefully before operating the instrument to understand its correct operation.
2. Do not open the cover of the instrument by yourself due to the danger of shock.
3. Turn off the mains input switch and the battery switch in case of any urgency.
4. Keep the instrument connected to the ground before connecting it.
5. Be aware that there are many kinds of power sources for the instrument, and the line bank or socket may still have voltage even if only the main power is disconnected.
6. Remove the cable between the battery and the instrument before repairing. Wait for another 5 minutes for discharge due to the danger of shock.
7. Fasten wires to the terminals and do not short the anode and cathode of the battery. It is prohibited to touch any two wire connectors or bare end of connecting wires as it may lead to damage of battery or personal injury.
8. Keep the battery and battery group away from fire and all instruments that may cause a spark to prevent danger and damage.
9. Do not open or shatter the battery as the overflow electrolyte is with causticity may be harmful to life.
10. Contact the professional personnel of the local dealer or special maintenance station for any troubleshooting. Random disposal of the trouble is not allowed.

During transportation and storage, it is important to follow the guidelines provided in sections 3.1 and 3.2 of the user manual. In case of frequent abnormal diagnose, refer to section 6.6 of the manual for further instructions.

NOTE
Please carefully read the user’s manual before the operation for the sake of understanding the correct operation of the instrument. Please keep the manual handy for future reference.

WARNING
The input and output of the instrument is with dangerous high voltages which may endanger the safety of life. Please strictly follow the operating description is not allowed to remove the cover of the instrument.

1. The input & output voltage of the instrument is dangerous and will endanger the safety of life。
2. Please do not open the cover of the instrument by yourself in view of the danger of shock。
3. Please turn off the mains input switch and the battery switch for any urgency。
4. Please keep the instrument connect the ground before connecting the instrument。
5. There are many kinds of power sources for the instrument, the line bank or the socket may still have voltage if only the main power is disconnected.
6. Please remove the cable between the battery & instrument before repairing. It’s necessary to wait for another 5 minutes for discharging, because of the danger of shock.
7. The wires should be fastened to the terminals. It is prohibited to short the anode and cathode of the battery. It’s prohibited to touch any two of wire connectors or the bare end of connecting wires. Otherwise, it may lead to damage of the battery or personal injury.
8. Please keep the battery and battery group away from the fire and all the instruments that may cause spark to prevent danger and damage。
9. Please do not open or shatter the battery, the overflow electrolyte is with causticity that may be harmful to life.
10. Please contact the professional personnel of the local dealer or the special maintenance station for any troubleshooting. Random disposal of the trouble is not allowed.
11. This is an A-grade product with electromagnetic compatibility, it may make some radio disturbance in the environment. In this situation, users should adopt some actual and feasible methods for anti-interference.
12. The instrument should be maintained by the service professional.
13. Before you replace the battery of different brands and different type, make sure the charging voltage is matching with machine charging voltage due to the different required charging voltage of the different batteries, If any doubt, please consult with the manufacturer. Any changes of the system configuration, structure and composition will influence the performance of the machine, please consult with the manufacturer in prior before doing any changes.
14. Before usage, confirm that the temperature of the instrument has dropped into the normal run range. It is recommended still placement for 24 hours in the normal temperature range before startup.

Summary

Brief Introduction

Products Characteristics

Powers of sine wave for communication accord with ISO IEC146-4, GB7260, maintenance regulations of MINPTT, certification and examination details of network admittance quality of the inverter equipment for communication, and can be inverter power supplies in the environments such as post telephone and telegraph, railway, marine etc. and AC uninterrupted power supplies for that such as Chinese teletex facility, telegraph terminals, wireless call facility, data switching exchange, local exchange, microwave communication facility, charging system for the cell type exchange, facsimile apparatus for character and image, kinds of AC instruments and computers etc.
Powers, being able to supply high-performance uninterrupted AC power for various precision instruments, have mainly the following characteristics and functions:

• Adopting rack imbed design so as to be more slinky and tide.

• Guard of input polarity opposition
  When DC input polarity terminals are reversely connected, the inverter would not work but not be destroyed.

• Normal startup
  The inverter will supply normal voltage in 5s~20s after the on/off key on the panel pressed if the DC input voltage is in the required range for the normal startup.

• Low-voltage alarm and protection for DC input
  The inverter will send out alarm noises every 0.5 seconds but continue normal power supply to loads as the DC voltage below the low-voltage alarm point. When the DC input voltage is lower than the low-voltage protection point, the inverter will stop inversion, sending out long alarm noise and highlight the BATH/L indicator on the panel, so as to avoid the damage to the DC power resulting from low-DC-voltage.

• Over-voltage alarm and protection for DC input
  The inverter will send out alarm noise every 0.5 seconds but continue normal power supply to loads as the input voltage above the over-voltage alarm point. When the DC input voltage is higher than the over-voltage protection point, the inverter will shut down automatically for protection with no output.

• Communication
  The inverter offers dry connector. Through the dry connector, the work status can be monitored.

• Self-startup when input voltage resumes to normal
  The DC input voltage out of normal startup range will result in self-shutdown of the inverter, bypass output, and sound-light alarm. When the voltage recovers, the inverter will restart automatically.

• Over-voltage protection for output
  The inverter will stop inversion and turn to bypass output, sending out a sound-light alarm as the output voltage above the over-voltage protection point. Restart manually the inverter once the trouble is eliminated.

• Low-voltage protection for output
  The inverter will stop inversion and turn to bypass output, sending out a sound-light alarm as the output voltage is below the low-voltage protection point. Restart manually the inverter once the trouble is eliminated.

• Over-temperature protection
  When the temperature of the main radiator goes beyond the over-temperature protection point the inverter will stop inversion and turn to bypass output, sending a sound-light alarm. The temperature drop is about 20℃.

• Overload protection
  The inverter will stop inversion and turn to bypass output, sending out a sound-light alarm as overload for a period of time. Once the load resume to normal, the inverter will turn to inversion output automatically. The overload protection drop is about 10％.

• Short circuit protection for AC output
  The inverter will stop inversion and send out a continuous sound-light alarm if the load undergoes short circuit. Restart the inverter manually once the trouble is eliminated.

• Bypass auto-lock
  To avoid frequent conversion, the inverter will be auto-locked to bypass output with a continuous sound-light alarm when the inverter switches to bypass output 5 times continuously in 8 minutes. Restart manually the inverter once the trouble is eliminated.

• AC input abnormal status alarm
  If Li, Ni are reversely connected the buzzer will alarm intermittently,

Technical Specification

Model NO.

Specification and Parameter

|

500VA

|

1kVA

---|---|---
Rated Output Capacity| 500VA/350W| 1000VA/700W

AC Input

| AC input (Vac)| 220Vac/230 Vac
Frequency(Hz)| 50Hz
AC input range| ECO first (the mains supply is normal，195~265)
Frequency range| （47.5~52.5）±0.5Hz

DC Input

| Rated voltage (VDC)| 48
Rated current (A)| 8.5| 17
Normal DC Input range (VDC)| (41~57)±1
Start input max impact current| Less than 150% rated current
DC Input range of normal start| （46～56）±1VDC
Low voltage alarm of DC

input

| 44±1VDC
High voltage alarm of DC

input

| 58±1VDC
Low voltage protection of DC input| 40±1VDC
Over voltage protect of DC input| 60±1VDC
Input terminal reverse comparable broad range static current|

<10%

AC  Output

| AC Output (Vac)| 220Vac/230 Vac±3% (Inverter output)
Frequency (Hz)| 50±1% Hz
Dynamic voltage transient| <10%
Resume time of dynamic transient (ms)| < 60ms

Wave form

| Sine Wave, THD<3%（Linear Load）
Sine Wave, THD <8%（Nonlinear Load）
Power factor| 0.7|

0.7

Overload Capacity| 105%～125% lasting not less than 60 sec, load126%～150% lasting not less than 1s, resume point is 90% load

AC  Output

| Peak value coefficient of output current| 3: 1
Switch time for inverter to bypass status| < 5ms
Output Mode| Terminal, Socket
Display| LED Indicating Lamps(Display working status)
Communication Function| 3PIN Dry contactor (Qty: 2PCS)
Alarm Function| DC input abnormal, Overload, Inverter Fault

Protection Function

| DC input low-voltage and over-voltage protection, overload protection, short-circuit protection, AC output over-voltage or low-voltage protection,

over-temperature protection

Transmission| Meet YD/T983-1998 A-standard
Radiation| Meet YD/T983-1998 A-standard
Interference Rejection| Meet YD/T983-1998 A-standard
Insulation Resistance| > 2MΩ（500VDC）

Dielectric Strength

| 2200VDC(AC input, Input and output to ground, DC Input to AC output), no flashover voltage 1 min
---|---
Cooling-down Method| Wind cooling
Noise (dB)| <50dB（1m）

Work Environment

| Working Temperature(℃)| －10℃~ +40℃
Relative Humidity| 0~95%，without condensation
Height Above Sea Level| ≤1500m, meet GB3859.2-93 derating requirements

Storage Environment

| Inverter Storage Temperature (℃)|

-40℃~+65℃

Relative Humidity| 0%~95%，without condensation
Dimension (mm) (D×W×H )| 286×440×43.5
Weight (kg)| 5

Please forgive us for no addi t ional announcement for the speci f icat ion change

Basic Principles and Structure

Stand-alone Principle

Principle Diagram

Principle

The stand-alone is mainly composed of conjugate wave-filter, reverse static absorber, high frequency boosting return circuit, PWM sine inversion control, AC output wave-filter, bypass control and communication examination display interface. When 48VDC power supply circuit is connected, the DC input will be signal-preprocessed by the conjugate filter and the reverse static absorber, secondly boosted by the high-frequency boosting circuit, thirdly converted into 220Vac output by high-frequency PWM inversion circuit, at last supplied to the load equipment after wave-filtering process. The status and work parameters of the whole system are under monitoring by communication interference and displayed by the indicator light on the panel. When AC input is normal, if the protection such as overload, over-temperature, input low- voltage or over-voltage, output low-voltage or over-voltage appears, the inverter will turn to bypass power supply.

Structure

Structure and Appearance

Appearance Illustration

1. The operation interface of the equipment is in the front. The front panel description listed in table 2-1, and every part in the front panel has relevant diagram. (See the below table 2-2~2-4 and fig 2-3~2-4)
   Parts| Description
   ---|---

On-off key

| Under the normal DC input voltage, press the on/off switch, drop the ”1”side, the inverter will start up and begin to output; drop the ”0” side, the inverter will shut down and turn to bypass output.
Line (Green)|

LED

| The inverter has line input the light on

Inverter（Green）

| The inverter normal the light on
The mains supply is normal the light coruscate
BAT.H/L（Yellow）| The DC input abnormal the light on
Fault（Yellow）| The inverter fault the light on

Signal

| Two-way，one is for the inverter abnormal alarms;

one is for DC input abnormal alarms or the SPD abnormal alarms.

Chinese stand socket| For AC output
Vent| Make the equipment cool down
DC Input Terminal| 2 Pins
AC input & output Terminal|

5Pins

SPD (optional)| Class C
Fan| Blow the air out
Indicator light| Information
---|---
LINE| Line is input, light on; no line input, light off

INV.

| Inverter normal, light on; Inverter abnormal, light off.
The mains supply is normal, light coruscate
BAT.H/L

Battery abnormal

| The light blinks when DC input low-voltage or over-voltage alarm; The light on when DC input low-voltage or over-voltage protection.
Fault| Inverter normal, light off; Inverter abnormal, light on.
Dry signal terminal| Mark| Description
---|---|---

Green socket (the relevant plug

can be pulled in or out)

| 1，2| When DC INPUT abnormal, gives an alarm.

While normal, carve out a way, also, while abnormal, short.

1，3| When DC INPUT abnormal, gives an alarm.

While normal, short, also, while abnormal, carve out a way.

While normal, carve out a way, also, while abnormal, short.

4，6| When inverter abnormal, gives an alarm.

While normal, short, also, while abnormal, carve out a way.

DC INPUT

| +| Anode| Connected to the -48VDC PE terminal in the rack.
–| Cathode| Connected to the -48VDC terminal in the rack.

AC OUTPUT

| LO| Caustic line terminal|

AC output for Load

NO| Neutral line terminal
AC input & output|

PE

| Grounding terminal|

Connected to grounding line in the rack.

AC INPUT

| Ni| Neutral line terminal|

AC input, using for synchrony and bypass output.

Li| Caustic line

terminal

2. Rear panel with DIP switches and vents holes, of which DIP switches as follows.
3. 1#: DIP switch is allocated to the-H,-J point, the battery low voltage alarm and protection points are different:
4. H: Low voltage alarm and protection points 46±1VDC /44±1VDC
5. J: Low voltage alarm and protection points 44±1VDC /40±1VDC
6. 2#:When DIP switch is allocated to ECO, it is mains priority mode When DIP switch is allocated to INV, it is inverter priority mode
7. 3#: When DIP switch is allocated to O, it is under ECO mode, inverter is open(output is mains)
8. When DIP switch is allocated to C, it is under ECO mode, inverter is closed(output is mains)

Transportation and Storage

Transportation
During the portage, do strictly comply with the caution brands on the packaging carton to handle the inverter with care and place it in the correct direction to avoid the oscillatory device damage. It is prohibitive that the inverter is positioned in the open car or cabin, mixed with flammable and explosive commodities, parked in open air during the transshipment. No raining, snow or liquor straining and mechanism shattering.

Storage
The location direction should accord with what shown on the package when the equipment is been stored. The package carton should be blocked up about 20cm and laid at least 50cm away from the wall、heat source、cold source、windows or air entrance. Keep equipment in dry storage, and prohibit isolation and raining. There should not be kinds of malfeasance gas, flammable, explosive and corrupting chemical material and strong mechanism shock, concussion and strong magnetic field in stocking room. The temperature for inverter storage is 0～40℃。The storage humidity is 20%～80%. The storage period should be 6 months except other regulation. Recheck if the period exceeds 6 months.

Installation

Installation Notice

1. Before the inverter installation, check if the feeding circuit of electric network is clear, including contacts of all the connection points and the sockets are OK, so as to avoid open circuit or short circuit.
2. For the input one-phase-three-lines system, do pay attention to whether the grounding is good and ensure the voltage between zero line and grounding line is less than 5V. If the grounding line is null, the voltage could be 100V. If the user load has strict requirement to voltage between the zero line and the grounding line of the power supply, make sure the grounding of the mains supply is good so as to avoid unnecessary loss.
3. When you are installing the inverter, do not reversely or wrongly connect the anode & cathode of the DC INPUT and the zero line, caustic line and grounding line of the inverter output so as to avoid short circuit and check out if the voltage of the mains supply is normal.
4. The inverter installation requirement:
5. Lie the inverter on the flat ground (avoid sloping and accidented ground).
6. Do not place goods on the inverter nor do the person sitting.
7. Avoid placing the inverter in the sunlight、rainy and moist location.
8. Do not place the inverter in the location with erosive gas.

Site and Environment Requirements

Site Requirements

1. Cleanness
   Do not stack sundries and rubbish around the inverter, Unfortunate drop or place of the globule or metal may result in the short circuit which is dangerous to the system and human life security. The dust or sundries in the exhaustion vent may get in the way of air circulation even affect the cooling of the fans, which will result in the system shutdown cause of over- temperature. The civil engineering construction of the equipment room should be completed totally with the floor sclerotic and tidy dry dust-free site.

2. Fire control
   Strictly prohibit the storage of flammable explosive and dangerous commodities in the equipment room.
   To lower the feasibility of fire and the damage resulted from it, in the room where the inverter placed, there should be the fireproof material used to the wall、cell and ground and serviceable and valid fire protection equipments configured such as portable CO2 extinguisher.

3. Ventilation and heat emission
   For the convenience of the operation maintenance and the heat emission of the equipment, there should be clearance about 30～50cm around the inverter and 50cm above the top. Exhausting fans should be installed beside the batteries, which have longest usage under the common temperature（20°C）, to keep the good ventilation of the room.

Environment Requirements

• Ambient temperature: -10℃～+40℃ ;
• Relative humidity: 0%RH～95%RH, no condensation;
• Cooling mode: air cooling;
• Altitude: meet GB3859.2-93;
• Verticality: no shock with orthogonal rake not exceeding 5;
• Pollution rank: Class Ⅱ;

The inverter should be installed in an environment that has enough ventilation, cool clear air, not too high humidity and no dust. The recommended work temperature is 20~25℃ and the humidity should be controlled around 50％.

Notice:
Strictly forbid the installation in an environment with dust of metal conduction.

Unpacking

The inverter and accessories, packaged in carton or wooden crate and carton, should be carefully unpacked and checked whether are all ready or damaged during the transportation, according to the package list. Make sure that all the accessories have been found before package material cleanliness. If the equipment or the accessory has been damaged during the transportation or not accorded with the purchase contract, record them on the spot and contact immediately the local branch or office of Kehua Company. Check if there is mechanical damage resulting from the transportation after the new product is unpacked. When serious damage of appearance have been found, do the further examination.

Power Examination
Before installation, make sure load capability of electric network satisfies the new equipment requirement and the power accords with the voltage and frequency on the nameplate, if current carrying capability declined cause of the aging of lines. If any doubt, please negotiate the solution with the local mains supply department.

Base requirements to mains supply

1. The grounding line preparation
   The grounding terminals are ready and the voltage between zero line and the grounding line does not exceed 5 V.

2. DC input voltage and load capability
   The rated DC input voltage is 48VDC and the capacity of the DC input supply should larger than the max input capability of the inverter. (The inverter is a stand-alone model and cannot directly output in parallel. When multi- inverters work at the same time, direct parallel connection of the output terminals to supply power is forbidden. ) Before the inverter installation, confirm if load capability of electric network satisfies the new equipment and think over if current carrying capability declined cause of the aging of lines.

3. Switches configuration to protect the input
   There should be sole circuit of air switches or fuse element circuit left for the inverter in the DC distribution cabinet or board, which is recommended to be fabricated by a professional maker. The feed wire and air switch selection is shown in table 4-1.
   Note: When the distance from DC power distributor to the inverter terminals is longer than 5 meters,the sectional area of the corresponding DC cable must be enlarged.

4. Bypass input
   When the machine is on bypass status, the main supply will be carried out by filter directly. In order to ensure the equipment safety connected to the inverter, the mains supply must need content with input voltage （220±25﹪）Vac and frequency（45~55） Hz. At the same time, breakers are necessary on the input AC circuit. Selection of the breaker and cable refer to table 4-1.

Model

|

Maximum

DC current (A)

|

Required DC fuse or breaker capacity (A)(Negative)

|

DC cable dimension (mm2)

(each for anode and cathode)

|

AC

breaker capacity (A)

| AC cable Dimension (mm2) (each for live ,zero and grounding)|

Ground wire (yellow-green wire) (mm2)

---|---|---|---|---|---|---
500VA| 8.5| 16| 1.0~1.5| 5| 0.75| 0.75
1kVA| 20| 32| 6~10| 5| 0.75| 0.75
5. Lightning protection
In the terrain with frequent lighting, the mains wire inlet and apparatus room should be equipped with multilevel lighting arrester to make sure the safe run of the equipment

Brief installation introduction to the mainframe

1. Fastening of inverter: Mount the plate on the inverter as fig.4-1 shown first, then fasten the inverter to frame through the plate.
2. Connect the grounding line（PE）of the rack with that of the inverter.
3. There should be proper air switches, left open, in series between the DC input terminals of the inverter and the DC supply power (refer to table 4-1). Once the wiring between the two finished, turn on the switches.
4. Connect the 220Vac output to kinds of load with GB double head power line, paying attention to the grounding label and make a good grounding.
5. Only one output socket and one 3-pin terminal are supplied. If the load equipment are many and the total capacity accord with that of the inverter, you can use the method of adding output lines to meet the wiring demand of the load.

Electric Connection

1. Wiring requirements
2. Adopt aerial stringing when top wiring is requested, and closed conduit stringing when bottom wiring requested. Guideline: safe, reliable, and canonical.
3. No connecting point in the cable.
4. Black should be first selected as the cable use a uniform color and make mark to the cables to avoid confusion.
5. The AC cable terminals, connecting points and other unnecessary bare parts should have enough isolation treatment.
6. To avoid a short circuit, do not reversely or wrongly connect the anode and cathode, check if the input DC voltage meets the requirement ((47～54）±1VDC).
7. The output of the inverter should not connect with inductance load, half-wave commutate load or unbalanced load. Such loads as: air-conditioners, blowers, starter, electric drillers, motor, daylight lamp, etc.

Cable Wiring
The cable wiring is shown in Fig. 4-3:#

• Connect the inverter grounding line （PE）to that of the rack.
• Connect the DC cable（48VDC）with the anode and the cathode terminals of the wire bank respectively. Pay attention to the correct c polarity connection.
• After the wiring is complete, connect the DC cable to the 48VDC power supply system. In case that such as short circuit emerges leading to fire accident, suitable breakers should be installed between the DC cable and the wire bank.
• Every inverter module needs its independent DC input circuit. The selection of DC cable and breaker refer to table 4-1.
• The DC current should be induced out from where as close as possible to DC input terminals so as to reduce voltage drop. In view of output characteristics, the cable length is seldom longer than 5 meters. Addition of length is possible if necessary, but too much addition will result in DC low-voltage, which would cause DC low-voltage protection when the load is switched by now enlarge wire size to reduce line voltage drop.
• All the junctions must be tightly secured with good conduction.
• If the DC cable is longer and other DC input equipment are connected in parallel at the user end, one must connect with the public end in parallel a 10000-20000uF, (1.5-2 ) × DC-rated input pressure resistance capacitor to eliminate cross interference static.
• Please set the line bank cover after connection, preventing getting an electric shock.

Grounding
The grounding system should be well maintained. There should be reliable electronic connection between the safeguard grounding equipment of the inverter and the grounding blot of the metal enclosure; the grounding resistance should be less than 0.1Ω.#

System Examination and Test

Electric Connection Examination

1. AC output wires examination: check if the colour is normative, if the size is proper, if the wires have connected to outside control switches, if the connections of the caustic line（L）, zero line（N）, grounding wire（PE） are correct and if wire connections are firm.
2. AC input wires examination: check if the color is normative, the size is proper, the wires have connected to outside control switches, the connections of the caustic line（L）, zero line（N）, grounding wire（PE）are correct and wire connections are firm.
3. The grounding wire examination: check if the grounding wire of the inverter is connected to the collecting bar in the apparatus room and the connection is reliable.
4. The voltage which below 5V between the zero wire and the grounding wire examination.
5. If the inverter has installed a remote monitor device, check if the correlative connection of the serial port is correct.
6. Check if the wiring is regular, cable binding accords with the technical criterion.
7. Check if the installation and wiring is good for further development, proliferation and maintenance.

Inverter Test
The inverter test: check and make sure the wire connection is right, then press the On/Off key to start up the equipment, about 20s later, will get a steady AC OUTPUT voltage of 220Vac/230Vac.

Load Connection
Till the inverter startup into steady work status, turn on the load equipment with ample power ones first and low power ones later because the startup current of some equipment are large enough to result in over-load protection (or bypass protection). So it is advisable equipment of this kind should be started up before the others.

Usage

Notice

1. Before the inverter startup, check if the load is proper, which should not exceed the rated power or the status overload protection or all time bypass power supply of the inverter will be brought about.
2. Do not use the switch on the inverter panel as the power switch of the load equipment and strictly refer to the follow sequence to turn on or off the inverter: when startup, firstly turn on the switch on the inverter panel then the equipment’s. When shutdown, firstly turn off the switch of the equipment then the inverters. Avoid frequent startup.
3. Till the inverter startup into steady work status, turn on the load equipment with high-power ones first and low-power ones later because the startup current of some equipment are large enough to result in over-load protection (or bypass protection). So it is advisable equipment of this kind should be started up before the others.
4. When the inverter is connected to the generator is necessary as the mains supply cut off, firstly start the generator, then switch in the inverter till the generator on steady work status or the inverter or the load equipments may be damaged. In a similar way, disconnect the inverter and the generator before the generator is turned off.

Startup Preparation
Load Capacity Calculation 1kVA calculates load capacity based on 70% resistance load of nominal rated power. Usually the largest bearable computer load number N is calculated according to the following formulae:

In the equation, P stands for inverter output capacity (VA), Pi is VA of No. i load.
Example : a user has the computer equipment of the following nominal powers.

• IBM PC: 230V/1.5A(345VA)
• LQ1600K printer: 230V/1.0A(230VA)
• 14-inch color monitor: 70W
• Total power: 345VA + 230VA + 70/0.6VA = 692VA

Confirm the following items for the normal work of the inverter

1. Make sure there is no mistake of the input and output installation.
2. Connect the input terminals to the rated power.
3. Make sure there is no short circuit of the inverter output and load capacity does not exceed that of the inverter.
4. Make sure computers or other instruments are off.

Operation

Daily startup and shutdown

In daily routine use, please operate following the procedures below for startup or shutdown: Under the normal condition of DC input voltage, press the on/off switch, drop the end with the ”1” shape, the inverter start up and begin to output; drop the end with the ”0” shape in running state the inverter will be turned off and turn to bypass output. Till the inverter startup into steady work status, turn on the load equipment with high-power ones first and low-power ones later because the startup current of some equipments are large enough to result in over-load protection (or bypass protection). So it is advisable equipment of this kind should be started up before the others.

Operation

After the successful installation, the operation is very convenient for just only press the ON/OFF switch and the inverter will start up automatically into power supply mode. You can observe the run status of the inverter from the display panel. When the inverter sends out an alarm or enters the protection mode, after the fault is eliminated, just only restart, and it will resume to normal

Maintenance Guard

Apparatus Room Management
The apparatus room management includes environment safety management and equipment management. The basic targets for environment safety management is to keep apparatus room factors such as temperature, the related humidity, cleanliness, static disturbance, noise, strong electromagnetism etc to meet the requirement and ensure the stability, reliability and security of power equipment and normal supply for the communication equipment. The basic targets of equipment management is to ensure perfect mechanism performance, electricity performances meeting related standard, reliability of equipment running, and full technical reference and origin records. The testing items about the power, DC input room management please refer to table 6-1(Only for reference).

Week
4| Temperature and humidity alarm function examination.| Week
5| Air conditioning filter（web） dust cleanliness or replacement.| Week
6| The resistance test of anti-static work table, ground, chair and bangle.| Week
7| Light arrester examination（before storm season）.| Season
8| The fixed gas fire extinguisher examination.| Year
9| The annunciator examination for flammable gas.| Year
10| The examination on smoke, temperature sensor and auto fire annunciator.| Year
11| Grounding line examination and the resistance to ground test.| Year
12| The test of dust thickness in the apparatus room.| Year

Maintenance Guide
Correct maintenance, including the preventative maintenance and remedial maintenance, is the key to the best operation and longer usage life of the inverter. Preventive maintenance includes some regular programs to avoid the faults of the power system and reach maximum efficiency. The remedial maintenance includes probing of the power system fault for effective maintenance.

Safety Precaution
For safe and smooth maintenance on the power system, you must follow the related safety precautions, prepare the necessary gears and testing equipment and operate under the eligible maintainer’s control. Pay attention to the following safety operation regulations:

1. Please remember that even if there is not inverter running, dangerous voltage still exists inside. After the input break, there is still unreleased electric charge in the BUS mother cables connected to the internal electrolytic capacitors so that do leave the inverter still for 10 minutes and use the voltmeter to make sure the power has been cut off and on the safe status before the maintenance.
2. Prohibit conductive objects such as wearing ring, watch etc when machine operation.
3. No assume the safe operation as a matter of course. Any questions please quest the personnel with well-knowledge on equipment.

Periodic Preventative Maintenance

1. To improve the efficiency and reliability of the inverter power system, please complete the following preventative maintenance operations:
2. Keep environmental cleanliness to avoid dust or chemical pollution to the inverter.
3. Examine the input and output terminals every half year to ensure the good contacts.
4. Examine periodically fans working status to prevent sundries to plug up the ventilation. If any damage, please change at the time.
5. Examine periodically the inverter work status.

Maintenance Procedure

1. Push the On/Off key on the front panel to shut down the inverter. (The load equipment would be power-off, please notice to save the load information.).

2. Cut off breakers that connect the inverter and input power supply, isolate the input terminals from DC supply, pull out the AC output connectors.

3. Disassemble the wires of DC input and the grounding by the tool like a screwdriver. Enclose the wire connectors by insulating tape to prevent short-circuit with other lead wires.
   Notice : Make sure the breakers of DC input must be cut off before disassembling the connecting wires of them.

4. Disassemble the screws fixing the front panel of inverter and rack to pull out the inverter from rack for maintenance or replacement.
   Notice : There still is residual charge in the capacitors inside the inverter which may be hazardous to personal security so that disassemble the shell after enough time still placement (at least 10 min) for charge release. ）

5. After maintenance or replacement completes, push the inverter into the rack, fix it with screws, wire DC input, and the grounding, turn on the breakers, plug-in the load cables, push On/Off key on the panel to start the inverter.

Frequent Abnormal Diagnose

After the inverter startup, if abnormal, please do not judge it as inverter fault in hasty. You can refer to table 6-2 to look for some probable reasons. At the same time, please check if there is the outer environment cause (temperature, humidity or overload). After the treatment according to table 6-2, the inverter is still abnormal, hand it to service professionals. This section only contains some simple regulations for fault diagnosis. If the result of diagnose not sure or the information for problem settlement not enough, please contact the local office or distributor.

No display after startup

| a、DC circuits not connected b、DC input voltage abnormal

c、Polarity opposition of DC input

| a、Connect the DC circuits b、Adjust DC input voltage

to normal

c、Correct polarity connection

2|

Instant low voltage protection when load after startup.

| a, DC input voltage too low b Cable resistance strong c, DC circuits wiring loose| a、Adjust the DC voltage to normal

b、Enlarge wire size or shorten

wire to reduce the resistance c、Check if the connection firm

3|

Instant overload protection after startup

| a、Overload too much

b、Loads or output sockets short circuit

| a、Properly configure the load b、Eliminate user end faults
4| Additional static to the adjacent equipments on the public DC circuit after startup.|

DC wire resistance too strong.

|

Reduce the resistance or the static-eliminating capacitor in parallel.

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