Two Questions:
For transformer protection:
1) If I need to use series connected two fuses for transformer primary protection, can I use one fuse on the primary side and on the secondary side the other, or I must use both of them on the primary side in order to call it series connected?
2)If I...
Hello everyone,
I have an existing Quadramho relay setting (21 function). It has Zone 3 setting as forward and reverse (offset) settings. It gives me Offset Mho option to set. Now I need to transfer the same setting to a new Siemens 7SA522 relay.
Question: What would be the best way to set...
When you calculate CT's ANSI/IEEE standard burden, do you have to include CT's internal registance?
This is to calculate Per Unit CT burden (Zb)for the final calculation of CT's performance in terms of saturation at the time if there is a (severe) fault.
For instance, for a CT C400 the ANSI...
XFMR(D-Y): 2MVA(ONAN)
2.66MVA (ONAF)
Z% = 5.75, 2-windings
Voltage: 4160V(D)/600V(Y)
OCPD: High side has circuit breaker with protection relay (51/50). Low side also has circuit breaker with protective relay (51/50).
I know that in this application high side relay can be...
