User`s guide

Volume 3—Power Distribution and Control Assemblies CA08100004E—November 2013 www.eaton.com V3-T9-245
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
Wiring Diagrams
Typical AC Connections Delta-Wye Transformer with Wye CTs and Neutral CT
Note
1
Inrush supervision is possible, if the fundamental
Harmonic > 0.1xI
n
and 2nd Harmonic > 0.01xI
n
.
Description Tolerance
Unbalanced Load: 51Q[x]
I2> ±2% of the setting value resp.1% I
n
Resetting ratio 97% or 0.5% x I
n
tDEFT
±1% resp.
Tripping delay time (DEFT) ±10 ms
Operating time Starting from I2
higher than 1.3 x I2> <+60 ms
Release time <+40 ms
k±5% INV
T-cool ±5% INV
Inrush Supervision IH2
1
IH2/I
n
±1% I
n
Resetting ratio 1% x I
n
or 5% x IH2
Description Tolerance
Breaker Failure Protection 50BF
I-BF> ±1.5% of the setting value resp.1% I
n
Resetting ratio t-BF ±1% resp.
±10 ms
Operating time Starting from I Higher
than 1.3 x I-BF>
<+40 ms
Disengaging time <+40 ms
Trip Circuit Monitoring TCM
t-TCM ±1% resp
±10 ms.
Current Transformer Supervision CTS
Delta ±2% of the setting value resp. 1.5% I
n
Resetting ratio 94%
t ±1% resp. ± 10 ms