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Hall effect principle based Current Transducer, specifically made to work in extreme atmosphere of traction application. Its measuring secondary circuit is galvanically isolated with primary circuit.
PRIMARY CURRENT SENSOR
for Electric Locomotives
Technical Features
- Very compact & light weight than conventional CT & Shunt.
- Can measure DC, AC and impulse / surge curent.
- Measuring range of the current 0 to ±1500 Amp.
- Conversion ratio of primary and secondary is 1 : 5000.
- Conversion ratio of primary and test circuit is 1 : 1000.
- Measuring accuracy better than ±0.3%.
- Linearity is better than ±0.1%.
- Zero offset current within ±0.4mA.
- Measurement response time is better than 1us.
- Operating bandwidth 0 to 100Khz (-1db).
- Dielectric Isolation of Primary & Secondary 6KVAC.
- Operating temperature -30°C to 70°C.
Applications
To measure the current (DC, AC and pulsating upto 100Khz) accurately in high power circuit of 3Phase, 6000HP, WAG-9 class of Locomotives for 25KVAC, 50Hz system.
Technical Specifications
|
Nominal Primary current |
1000A rms |
|
Nominal out put current |
200mA rms |
|
Measuring range |
0 to ±1500 Amp. |
|
Conversion ratio of primary & secondary |
1 : 5000. |
|
Input Power supply Voltage |
+ 15VDC to + 21VDC and -15VDC to -21VDC |
|
Measurement accuracy |
± 0.3% of Input current |
|
Linearity in measurement |
Better than ± 0.1% |
|
Zero Offset current |
Max. ± 0.4mA |
|
Response time |
Better than 1us |
|
Bandwidth |
0 - 100Khz (-1db) |
|
di/dt response |
Better than 50A / µs |
|
Current consumption |
25mA + out put current |
|
Dielectric Isolation Primary & secondary |
6.0 KV AC 50Hz |
|
Operating temperature |
-30ºC to 70ºC. |
|
Test Winding Ratio |
1: 1000 |
|
Approximate weight |
1.0Kg |
|
Compliance Standards and reference specification |
IEC 60571, IEC61373, IS 11731 Part I & II, CLW specification CLW/S/3/0084 |