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ABB REF615 F User Manual

ABB REF615 F
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t s
k A
B
U U
U
C
D
E
=
⋅
×
− >
>
−
+
GUID-6E9DC0FE-7457-4317-9480-8CCC6D63AB35 V2 EN (Equation 105)
t [s] operate time in seconds
U measured voltage
U> the set value of
Start value
k the set value of
Time multiplier
Table 661: Curve coefficients for the standard overvoltage IDMT curves
Curve name A B C D E
(17) Inverse Curve A 1 1 0 0 1
(18) Inverse Curve B 480 32 0.5 0.035 2
(19) Inverse Curve C 480 32 0.5 0.035 3
Section 11 1YHT530004D05 D
General function block features
830 615 series
Technical Manual

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ABB REF615 F Specifications

General IconGeneral
TypeFeeder Protection Relay
Nominal Frequency50/60 Hz
Rated Current1 A / 5 A
Protection FunctionsOvercurrent, Earth Fault, Under/Over Voltage
Communication ProtocolsIEC 61850, Modbus, DNP3, IEC 60870-5-103
MountingFlush mounting
Ingress ProtectionIP54 (front), IP20
Operating Temperature Range-25 to +55 °C

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