SIEMENS relay has 3 "ANSI 50" functions...(?)
SIEMENS relay has 3 "ANSI 50" functions...(?)
(OP)
Hi friends,
I need to understand the SIEMENS relay 7SJ640, it has 3 "ANSI 50" functions called 50-1, 50-2 and 50-3.
Please, how do these functions work together ? Let's say for example that I want the relay to trip the breaker instantaneously if the current reach 1200 A, how should these 3 functions be set ?
Thanks a lot,
Mongao
I need to understand the SIEMENS relay 7SJ640, it has 3 "ANSI 50" functions called 50-1, 50-2 and 50-3.
Please, how do these functions work together ? Let's say for example that I want the relay to trip the breaker instantaneously if the current reach 1200 A, how should these 3 functions be set ?
Thanks a lot,
Mongao






RE: SIEMENS relay has 3 "ANSI 50" functions...(?)
RE: SIEMENS relay has 3 "ANSI 50" functions...(?)
For your simple example, I would pick one and disable the other two to keep things simple. You could set all three the same for redundancy, but it would be a rare failure that would affect only one element in the same relay.
RE: SIEMENS relay has 3 "ANSI 50" functions...(?)