xx05000050.vsd
IEC05000050 V1 EN
two-winding power
transformer with two
circuit breakers and
two CT-sets on one
side
xx05000051.vsd
IEC05000051 V1 EN
two-winding power
transformer with two
circuit breakers and
two CT-sets on both
sides
Three-winding applications
xx05000052.vsd
IEC05000052 V1 EN
three-winding power
transformer with all
three windings
connected
xx05000053.vsd
IEC05000053 V1 EN
three-winding power
transformer with two
circuit breakers and
two CT-sets on one
side
xx05000057.vsd
IEC05000057 V1 EN
Autotransformer with
two circuit breakers
and two CT-sets on
two out of three sides
Figure 29:
CT group arrangement
for differential
protection
The setting facilities cover the application of the differential protection to all types of
power transformers and auto-transformers with or without load tap changer as well as
shunt reactors and local feeders within the station. An adaptive stabilizing feature is
included for heavy through-fault currents.By introducing the load tap changer
position, the differential protection pick-up can be set to optimum sensitivity thus
covering internal faults with low fault current level.
Stabilization is included for inrush and overexcitation currents respectively, cross-
blocking is also available. Adaptive stabilization is also included for system recovery
Section 6
1MRK502052-UEN B
Differential protection
102
Technical manual
Summary of Contents for Relion REG670
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