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one. Product introduction
Increasing the current sharing coefficient of each component in the rectifier can relatively prolong the service life of the component and increase the rectification efficiency. The function of the ZJ-1 current sharing tester produced by Zhuhai Hancai High-voltage Measurement & Control Equipment Co., Ltd. is to measure the current value of each rectifier thyristor or diode conduction under the operating condition of the rectifier, which provides a direct basis for improving the current sharing coefficient. The ZJ-1 current sharing tester and the ZDY-J current sharing sensor manufactured by Hancai High-voltage Measurement and Control Equipment Co., Ltd. are used in combination. Its functions are as follows:
You can display the average and peak value of the on-state current of each component on each rectifying arm and you can set the alarm.
It can display the bar graphs and waveforms of the conduction current of each component on each rectifier arm.
Can view historical data, with communication and printing capabilities. Each flow tester can communicate with computer networks.
The ZDY-J current sharing sensor is installed on each component branch and measures the on-state current value of each component separately. The signals are collected on the current-balance tester display.
two. Technical Parameters
(A) The flow tester
Model: ZJ-1
Current acquisition accuracy: 1%
Current acquisition resolution: 0.5%
Current acquisition interval: 640ms (between arms)
Tube current waveform acquisition points: 400 points/40ms
Adjacent channel interference: <0.5%
Number of rectifier arms (up to): 12
Number of each arm element (up to) : 12
Each arm element range: 1000A 1500A 2000A 2500A 3000A 3500A 4000A 5000A
Display: Monochrome 320*240
Alarm record storage: 650 overflow coverage, save 5 years
Alarm output: 4 normally open AC220V 3A; DC220V 0.4A
Host inquiry time: < 40 ms
Communication Interface: RS-485
(two) the flow sensor
Model: ZDY-J type
Accuracy: 0.5%
Response time: 10uS
Current Range: 1000A 1500A 2000A 2500A 3000A 3500A 4000A 5000A
Output signal: 4-20mA
Working power supply: AC220V
three. installation method
The housing of the ZDY-J current sharing sensor is made of flame-retardant insulating material and can be directly clamped on the copper plate (or aluminum plate) at the output end of each rectifying element. A ZDY-J current sharing sensor is installed at each rectifier element in the rectifier cabinet, and its output signal is collected by a special shielded cable to the ZJ-1 current sharing tester. The ZJ-1 current balance tester can be installed at the rectifier cabinet or control room.
