Our Schneider Micom P111 tripped

umairde1 · Jun 15, 2023

Dear All,

Need advice on some strange tripping occurred in our industry, our Protection Relay Micom P111, settings are below,
our relay tripped the VCB on about 75% of overcurrent settings two times and after replacing the protection relay same problem occurred, need support.
Picture attached for reference,

Phase	Ampere
Tripping Values A	259.2
Tripping Values B	259.2
Tripping Values C	259.2

CT Ratio	600
Setting	0.75
Setting Ampere	450
Time	1.5 secs

Megawatt · Jun 18, 2023

umairde1 said:
Dear All,

Need advice on some strange tripping occurred in our industry, our Protection Relay Micom P111, settings are below,
our relay tripped the VCB on about 75% of overcurrent settings two times and after replacing the protection relay same problem occurred, need support.
Picture attached for reference,

Phase Ampere
Tripping Values A
259.2
Tripping Values B
259.2
Tripping Values C
259.2
CT Ratio
600
Setting
0.75
Setting Ampere
450
Time 1.5 secs

You need to change your overcurrent protection up to 80% and you should be fine.