Checking of the overcurrent releases

Current source WPu-4000


Current source can generate currents up to several thousands amperes and has got module structure equipped with control panel, current source and hand truck enabling easy moving and transport. If it is permitted by outer circuit, the current source set can generate temporarily (15 s) 4200 A load. The source is equipped with high current terminals, supplying current from outputs 4000 A / 2,5 V or 100 A / 0,5 V alternatively. Every source should be used separately.


Current source WPu-400 has the highest power and output current in the series of current sources type WPu. It is portable testing set designed for AC current supply of devices which need checking and regulation of systems depended on the level of current or voltage e.g. thermal releases, current transformers, overcurrent releases, primary releases etc., and especially for testing of releases in power switches type APU.


Rated load current Izn 0 ÷ 4000 A
Max. power 10 kVA
Output voltage regulation range 0 ÷ 400 V
Allowable uncertainty of voltage measurement ±(0,2% of reading + 2 digits)
Allowable uncertainty of current measurement ±(0,2% of reading + 2 digits)
Chronograph range 0,1 ms ÷ 100 h
Operation temperature -5 ºC ÷ +40 ºC
Power supply 400 V , 50 Hz
Dimensions 550 x 660 x 1000 mm
Weight about 85 kg


All questions should be directed to:

  • Zygmunt Pilny MSc Eng., , +48 32 237 66 70.