Testing of a GEC MYTU (field failure) relay.
Testing of a GEC MYTU (field failure) relay.
(OP)
Hi ,
Hope someone can help me.
(Z1 calculated Impedence out by more than 15%)
MYTU relay settings
Time:2sec
Z1:11Ω
Z2:176Ω
Test results
Pick up current for Z2 check _ 55Volt @ 0.149Amps were recorded.
calculated Impedence 173.56Ω within 15%
Rest (Z1 check) _ 40V @ 3.030Amps were recorded.
calculated Impedence 6.6Ω (<15% error)
It should be within 15% of set value (11Ω)
have i used the correct formula for Z1
Formula used,
Z2=v/2I-Z1
Z1=v/2I
Thank you
Hope someone can help me.
(Z1 calculated Impedence out by more than 15%)
MYTU relay settings
Time:2sec
Z1:11Ω
Z2:176Ω
Test results
Pick up current for Z2 check _ 55Volt @ 0.149Amps were recorded.
calculated Impedence 173.56Ω within 15%
Rest (Z1 check) _ 40V @ 3.030Amps were recorded.
calculated Impedence 6.6Ω (<15% error)
It should be within 15% of set value (11Ω)
have i used the correct formula for Z1
Formula used,
Z2=v/2I-Z1
Z1=v/2I
Thank you






RE: Testing of a GEC MYTU (field failure) relay.
Z1 = V/I at pickup for Z decreasing from a value >Z1
Z1+Z2 = V/I at pickup for Z increasing from a value <(Z1+Z2)
(assuming Z1 and Z2 with X<0)
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.