User`s guide

V3-T9-244 Volume 3—Power Distribution and Control Assemblies CA08100004E—November 2013 www.eaton.com
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9.4
Metering Devices, Protective Relays, Software and Connectivity
Protective Relays
Protection Elements Tolerances
Notice: The tripping delay relates to the time between alarm
and trip. The tolerance of the operating time relates to the time
between when the measured value has exceeded the threshold
until the protection element is picked up.
Description Tolerance
Differential Protection Stages: 87[x]
Id > 0.1 Id[x] ±3% of the setting value resp. 1% I
n
Operating time Id > 0.3 x I
n
< 35 ms
Id > 0.5 x I
n
< 25 ms
Id > 1.5 x I
n
< 20 ms
Ground Differential Protection Stages: 87GD[x]
Id > 0.1 Id[x] ±3% of the setting value resp. 1% I
n
Operating time Ide > 0.3 x I
n
< 35 ms
Ide > 0.5 x I
n
< 25 ms
Ide > 1.5 x I
n
< 20 ms
Overcurrent Protection Elements: 50P[x], 51P[x]
Pickup ±1.5% of the setting value resp. 1% I
n
Resetting ratio 97% or 0.5% x I
n
tDEFT
±1% resp. ±10 ms
Operating time Starting from I higher
than 1.1 x I> <+35 ms
Disengaging time <+45 ms
t-Multiplier ±5%
IEC NINV
IEC VINV
IEC EINV
IEC LINV
ANSI MINV
ANSI VINV
ANSI EINV
Flat
It
I
2
t
I
4
t
Reset Mode ±1% resp. ±10 ms
IEC NINV
IEC VINV
IEC EINV
IEC LINV
5%
ANSI MINV
ANSI VINV
ANSI EINV
Flat
It
I
2
t
I
4
t
Description Tolerance
Ground Current Elements: 50G[x], 50N[x], 51G[x], 51N[x]
Pickup ±1.5% of the setting value resp. 1% I
n
Resetting ratio 97% or 0.5% x I
n
t DEFT
±1% resp.
±10 ms
Operating time Starting from IE
Higher than 1.1 x IE> <+35 ms
Disengaging time <+45 ms
t-Multiplier ±5%
IEC NINV
IEC VINV
IEC EINV
IEC LINV
ANSI MINV
ANSI VINV
ANSI EINV
Flat
It
I
2
t
I
4
t
Reset mode IEC characteristics
IEC NINV
IEC VINV
IEC EINV
IEC LINV
5%
Reset curves if ANSI characteristics
ANSI MINV
ANSI VINV
ANSI EINV
Flat
It
I
2
t
I
4
t
Thermal Replica: ThR
Ib ±2% of the setting value
Resp. 1% I
n
K
Pickup ThR ±1.5 % of the setting value