Areva MiCOM P921 - Page 370

P92x/EN RS/E11 Technical Guide
Test Report
Page 18/22 MiCOM P921-P922-P923
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7.3 “Phase overvoltage protection” function
Settings
[59] OVERVOLTAGE
Default values
Group 1 Group 2 (P922-P923)
1
st
stage activated No No / AND / OR * No / AND / OR *
1
st
overvoltage stage 130.0V if H1
480.0V if H2
VV
Time delay type DMT DMT/IDMT * DMT/IDMT *
TMS 1.0
tRESET V> 0.01s Secs Secs
tV>= 0.04s Secs Secs
2
nd
stage activated No No / AND / OR * No / AND / OR *
2
nd
overvoltage stage 130.0V if H1
480.0V if H2
VV
tV>>= 0.01s Secs Secs
3
rd
stage activated No No / AND / OR * No / AND / OR *
3
rd
overvoltage stage 130.0V if H1
480.0V if H2
VV
tV>>>= 0.01s Secs Secs
Hysteresis 0.98
7.4 “Residual (zero sequence) overvoltage protection” function
Settings
[59N] Residual O/V
Default values
Group 1 Group 2 (P922-P923)
1
st
stage activated No No/Yes * No/Yes *
1
st
residual O/V stage 5.00V if H1
20.0V if H2
VV
Time delay type DMT DMT/IDMT * DMT/IDMT *
TMS 1.0
TRESET V0> 0.01s Secs Secs
tV0>= 0.04s Secs Secs
2
nd
stage activated No No/Yes * No/Yes *
2
nd
residual O/V stage 5.00V if H1
20.0V if H2
VV
tV0>>= 0.04s Secs Secs
3
rd
stage activated No No/Yes * No/Yes *
3
rd
residual O/V stage 5.00V if H1
20.0V if H2
VV
tV0>>>= 0.04s Secs Secs