3kw Ballast

1. Brief Introduction

LPCU-1PH-A-3 is a high frequency electronic ballast, with high performance. It starts and drives middle pressure gas discharge lamp, which has dimming control system as well. How do it works shows at below:

3kw ballast work diagram

2.Working conditions

Environment temperature:-5℃~+5
Relative humidity :≤95%
Meet IEC61373-2010 standard requirement


3.Electric parameters

Lamp power(max)

(Output power)

Lamp voltage

(Output voltage)

300V-500V (depend on the lamp)
output current <8.6A
Input voltage 206-278VAC,single phase
Input current 17A(Max)typical valve
Input frequency 46-63Hz
Power factor 0.98(Typical value)
Efficiency >94%(Typical value)
Harmonic current distortion <5%(Typical value)
Range of output power 15%-100%
Output frequency 40-200kHz
Ignition voltage 1650Vp
Protect function Output short circuit protection,Open load protection,Output over voltage protection,Input over voltage protection,Input undervoltage protection,high temperature protection
Lamp monitor Current Monitor,voltage monitor
Control way IO(Compatible with PLC),

CAN open,


Working environment temperature -5℃~+55℃
High humidity 90%
Cooling way Forced air cooling,water-cooling
Protection class IP20
Size 329*135*65
Weight 4kg

4. Electrical interface

1.Input port

3kw ballast input port

Connector:PC 5/ 3-STF1-7,62 – 1777846

2.Output port

3kw ballast lamp output

Connector:PC 5/ 3-STF1-7,62 – 1777846

3.Control port A


Connector:Phoenix MC 0,5/8-G-2,5
Connected with PLC IO,Read “5-control way”

4.Control port B


Connector:Phoenix MC 0,5/7-G-2,5
CAN BUS, RS422/RS485 Communication interface. Read “5-control way”

5.Control way

This Model ballast has three control ways of PLC I0 Hard wire, CAN Bus communication, RS485/RS422 BUS Communication, chosen by code switch.


As code switch shows above, it stands for number 17.

Number meaning on Code switch

Code switch value Control way
0 hard wire control
Non O CAN bus/RS422 bus communication control

Code switch value is the communication address

  1.Hard wire control

Control port A connected with IO of the PLC,using the PLC to control the ballast.

1.1 pin definition

Pin Function Direction Type Description
1 PLC COM (0V) Input 0V the cathode of external power
2 Must Dangling
3 Fault code 1 Output Open connector Low level means fault(driver fault)
4 Fault code 2 Output Open connector Low level means fault(system fault)
5 Fault code 3 Output Open connector Low level means fault(indicator light fault)
6 START/STOP Input 24V The anode of external power
7 Lamp light on signal Output Open connector Low level means lamp works
8 Dimming control Input PWM Duty ratio controls power

1.2 Controller PLC connecting wire grid 

3kw ballast controller

1.3 lighting

1.3.1 Control port A Pin 6 connect with 24V, ballast starts output.
1.3.2 lights on all, control port A Pin 7, output low level
1.4 Dimming control

Exterior PWM signal enters into Ballast, ballast starts dimming control. PWM signal frequency scale: (1KHZ-3KHZ)

PWM Duty ratio Lamp Power
<10% 450W
10% 450W
97% 3000W
100% 3000W

2.CAN bus control way

Read “LPCU-1PH-A-3 CAN OPEN”protocol

3.RS422/RS485 bus control way

Read “LPCU-1PH-A-3 MODBUS”protocol

6. LED lamp indication

The ballast has five led indicator lights.


Name Description
RUN Supply power, “RUN” Lights on, ballast operates.
LAMP Indicator light flashes, lamp is on the process of lighting on.

Indicator light on stably, lamp finishes starting.

Indicator light off, lamp off.

FAULT Indicator light on, fault happens. (Ballast default or lamp default)
TX Indicator light flashes, communication data is sending. (CAN BUS OR RS485 BUS)

Indicator light doesn’t flash, no data is sending.

RX Indicator light flashes, communication data is accepting. (CAN BUS OR RS485 BUS)

Indicator light doesn’t flash, no data is accepting.

7.Dawing of overall dimensions

3kw ballast dimensions

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