Woodward HighPROtec MCDLV4, Руководство пользователя

Страница: 1012 / 1275

Protective Elements
Commissioning: Power Factor [55]
Object to be tested
Testing the projected Power Factor Modules
Necessary means
3-phase AC voltage source
3-phase AC current source
Timer
Procedure – Testing the wiring
•
Feed rated voltage and rated current to the measuring inputs of the relay.
•
Adjust the current pointers 30° lagging to the voltage pointers.
•
The following measuring values have to be shown:
P=0.86 Pn
Q=0.5 Qn
S=1 Sn
If the measured values are shown with a negative (algebraic) sign check the
wiring.
In this example PF-Trigger is set to 0.86 = 30° (lagging) and PF-Reset is set
to 0.86 = 30° leading.
Carry out the test with the settings (trigger and reset) that fit to your
switchboard.
Testing the threshold values (Trigger) (PF Trigger: Example = 0.86 lagging)
•
Feed rated voltage and rated current in phase to the measuring inputs of the relay (PF=1).
•
Adjust the angle between voltage and current (current pointer lagging) until the relay picks up.
•
Write down the pickup value.
Testing the Reset (PF Reset: Example = 0.86 leading)
•
Reduce the angle between voltage and current beyond PF = 1 (current pointer leading) until the alarm
drops off.
•
Write down the reset value.
1012 MCDLV4 DOK-HB-MCDLV4-2E