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phase non-directional overcurrent protection, three-phase under and overvoltage
protection. The IED also incorporates a thermal overload protection function,
which supervises the thermal stress of the transformer windings to prevent
premature aging of the winding's insulation.
The RTD/mA input module is optional in the standard configuration. When using
the RTD/mA input module it is possible to have the tap changer position indication
as an mA signal, ambient temperature of the power transformer can be used in
thermal protection and the multi-purpose protection functions are available. The
multi-purpose protection function enables protection based on analog values from
the IEDs RTD/mA input module, or from other IEDs using analog horizontal
GOOSE messaging.
The IED with a standard configuration is delivered from the factory with default
settings and parameters. The end-user flexibility for incoming, outgoing and
internal signal designation within the IED enables this configuration to be further
adapted to different primary circuit layouts and the related functionality needs by
modifying the internal functionality using PCM600.
3.5.2
Functions
Table 14:
Functions included in the standard configuration B
Functionality
IEC 61850
IEC 60617
IEC-ANSI
Protection
Three-phase non-directional
overcurrent protection, low stage,
instance 1
PHLPTOC1
3I> (1)
51P-1 (1)
Three-phase non-directional
overcurrent protection, high stage,
instance 1
PHHPTOC1
3I>> (1)
51P-2 (1)
Three-phase non-directional
overcurrent protection,
instantaneous stage, instance 1
PHIPTOC1
3I>>> (1)
50P/51P (1)
Three-phase undervoltage
protection, instance 1
PHPTUV1
3U< (1)
27 (1)
Three-phase undervoltage
protection, instance 2
PHPTUV2
3U< (2)
27 (2)
Three-phase undervoltage
protection, instance 3
PHPTUV3
3U< (3)
27 (3)
Three-phase overvoltage
protection, instance 1
PHPTOV1
3U> (1)
59 (1)
Three-phase overvoltage
protection, instance 2
PHPTOV2
3U> (2)
59 (2)
Three-phase overvoltage
protection, instance 3
PHPTOV3
3U> (3)
59 (3)
Three-phase thermal overload
protection for power transformers,
two time constants
T2PTTR1
3Ith>T
49T
Master trip, instance 1
TRPPTRC1
Master Trip (1)
94/86 (1)
Table continues on next page
Section 3
1MRS757054 A
REU615 standard configurations
44
REU615
Application Manual