Tests of circuit-breakers

DC/AC current source WPPS-300


WPPS-300 is designed for continuous operation in full scale regulation of all output circuits. Device is equipped with digital readout of forced current, voltage and measured time. Digital stop watch is controlled by changes of status obtained: no-potentially or by any voltage signal. Current source is protected from damage and has got resistant case with ABS.
For special demand the current source can be made in protection
class II, IP 67.




AC and DC Current Source type WPPS-300 is designed for checking and regulations of protection automatic devices supplied with AC and DC current e.g. current transformers, overcurrent and voltage relays, releases thermal protection, switch contacts etc. during start-up and periodical tests. It enables:

  • determination of instrument transformer ratio,
  • controlling and setting of protection automatics systems,
  • determination of release operating threshold,
  • determination of self-times of switches,
  • determination of resistance of switch main contacts.



Current regulation range I AC 0 ÷ 300 A
Output voltage regulation range U AC 0 ÷ Uz (for current 4 A)
Current regulation range I DC 0 ÷ 100 A
Milivoltmeter range DC 0 ÷ 2000 mV
Max. sources power 800 VA for AC and 300W for DC
Allowable uncertainty of AC / DC voltage and current measurement ±(0,2 % of reading + 2 digits)
Rated power consumption 1000 VA
Operation temperature -5 ºC ÷ +40 ºC
Humidity up to 80 %
Enclosure protection for special purpose II protection class IP 67
Power supply Uz 230 V, 50 Hz
Dimensions 486 x 392 x 191mm
Weight about 27kg


All questions should be directed to:

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