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1MRS757054 A
REU615
Application Manual
Three overcurrent stages (PHLPTOC1, PHHPTOC1 and PHIPTOC1) are offered
for overcurrent and short-circuit protection. LED 1 is used for indicating the
operation of overcurrent and short circuit functions. Also the same alarm
information is connected to the binary output SO2 (X110:17-19).
All operate signals are connected to the Master Trip and also to the alarm LEDs.
LED 1 indicates operation of overcurrent and LED 2 operation of overvoltage
protection functions. LED 3 indicates operation of undervoltage and LED 4
thermal overload protection.
GUID-C07A4101-8768-4365-BB4F-17CF3CF3D075 V1 EN
Figure 24:
Thermal overload protection
Three-phase thermal overload protection (T2PTTR1) provides indication on
overload situations. The operate signal of the thermal overload protection is
connected to the Master Trip and also to an alarm LED 4.
If the RTD/mA input module is included in the IED, the ambient temperature of
the power transformer is connected from the RTD channel to the thermal overload
function.
REU615 standard configurations
Section 3
49
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