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Accuracy
Pickup
Reset
Repeatability
Operate Time
Frequency Range
Operating Time
Current Applied
2 x setting
4 x setting
4.9 50N Backup Earth Fault
Definite time derived earth fault element.
Accuracy
Pickup
Reset
Repeatability
Operate Time
Frequency Range
Operating Time
Current Applied
2 x setting
4 x setting
4.10 51 Backup Overcurrent,
Three phase inverse time overcurrent element.
Accuracy
Pickup
Reset
Repeatability
Operate Time
Frequency Range
©2011 Siemens Protection Devices Limited
MSCDN – MP2A Performance Specification
100% of setting ± 5% or ± 0.02 I
≥ 95% of I
s
± 2%
± 1% or ± 10ms
st
nd
th
1
, 2
...15
Harmonic
Typical
2 cycles
1.5 cycle
100% of setting ± 5% or ± 0.02 I
≥ 95% of I
s
± 2%
± 1% or ± 10ms
st
nd
th
1
, 2
...15
Harmonic
Typical
2 cycles
1.5 cycle
105% of setting ± 5% or ± 0.02 I
≥ 95% of I
s
± 2%
± 5% or ± 40ms
st
nd
th
1
, 2
...15
Harmonic
n
n
n
Chapter 2 Page 10 of 13
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