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ABB REF615 L User Manual

ABB REF615 L
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GUID-01A2A41E-2813-448D-953F-F9690578DEDE V1 EN
Figure 199: Protection communication supervision detects failures on
communication
In-zone transformer
GUID-52FC4852-C9D1-4DD1-B2D7-62FCE98B7FD7 V1 EN
Figure 200: In-zone transformer example about CT ratio correction calculation
The CT ratio correction calculation starts with the rated load current calculation for
HV and LV sides. The rated load current is defined as the rated power of the
transformer divided by the square root of three times the nominal phase-to-phase
voltage at the HV or LV side.
Section 4 1YHT530004D05 D
Protection functions
376 615 series
Technical Manual

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ABB REF615 L Specifications

General IconGeneral
TypeFeeder Protection Relay
Rated Frequency50/60 Hz
WeightApprox. 1.5 kg
Communication ProtocolsIEC 61850, Modbus RTU, DNP3
Protection FunctionsOvercurrent, Earth fault, Thermal overload, Under/Over voltage, Under/Over frequency
EnclosureIP20

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