ref high impedance testing
ref high impedance testing
(OP)
Hi All,
I would like to know what is test procedure for testing High impedance REF Protection. How to perform ''secondary'' testing? Should I inject voltage on stabilizing resitor and increised it until relay operate? Or I should inject current in secondary side and increised it until relay operate, and measure voltage on resistor to see the operating value? What is ''normal'' or ''standard'' commissioning procedure....
THX
I would like to know what is test procedure for testing High impedance REF Protection. How to perform ''secondary'' testing? Should I inject voltage on stabilizing resitor and increised it until relay operate? Or I should inject current in secondary side and increised it until relay operate, and measure voltage on resistor to see the operating value? What is ''normal'' or ''standard'' commissioning procedure....
THX






RE: ref high impedance testing
RE: ref high impedance testing
RE: ref high impedance testing
You are right. To make it simple, apply voltage directly across the relay terminals and check whether it operates at the set voltage or not.
RE: ref high impedance testing
ok,but it is connected to current input of the Protection relay.... So that means that I cannot just inject voltage on current inputs. This is for HZPDIF function in ABB relay. So I need to have current which will flow in to the relay