Name Type Values (Range) Unit Description
Voltage U31B FLOAT32 0.000...4.000 xUn Phase C to phase A
voltage (b)
Voltage UoB FLOAT32 0.000...4.000 xUn Residual voltage (b)
Voltage Zro-SeqB FLOAT32 0.000...4.000 xUn Zero sequence voltage
(b)
Voltage Ps-SeqB FLOAT32 0.000...4.000 xUn Positive sequence
voltage (b)
Voltage Ng-SeqB FLOAT32 0.000...4.000 xUn Negative sequence
voltage (b)
PTTR thermal level FLOAT32 0.00...99.99 PTTR calculated
temperature of the
protected object relative
to the operate level
PDNSPTOC1 rat.
I2/I1
FLOAT32 0.00...999.99 % PDNSPTOC1 ratio I2/I1
Frequency FLOAT32 30.00...80.00 Hz Frequency
Frequency gradient FLOAT32 -10.00...10.00 Hz/s Frequency gradient
Conductance Yo FLOAT32 -1000.00...1000.
00
mS Conductance Yo
Susceptance Yo FLOAT32 -1000.00...1000.
00
mS Susceptance Yo
Angle Uo - Io FLOAT32 -180.00...180.00 deg Angle residual voltage -
residual current
Angle U23 - IL1 FLOAT32 -180.00...180.00 deg Angle phase B to phase C
voltage - phase A current
Angle U31 - IL2 FLOAT32 -180.00...180.00 deg Angle phase C to phase A
voltage - phase B current
Angle U12 - IL3 FLOAT32 -180.00...180.00 deg Angle phase A to phase B
voltage - phase C current
Angle UoB - IoB FLOAT32 -180.00...180.00 deg Angle residual voltage -
residual current (b)
Angle U23B - IL1B FLOAT32 -180.00...180.00 deg Angle phase B to phase C
voltage - phase A current
(b)
Angle U31B - IL2B
FLOAT32 -180.00...180.00 deg Angle phase C to phase A
voltage - phase B current
(b)
Angle U12B - IL3B
FLOAT32 -180.00...180.00 deg Angle phase A to phase B
voltage - phase C current
(b)
3.8 Nonvolatile memory
The relay does not include any battery backup power. If the auxiliary power is lost,
critical information such as relay configuration and settings, events, disturbance
recordings and other critical data are saved to the relay’s nonvolatile memory. The
relay’s real-time clock keeps running via a 48-hour capacitor backup.
Section 3 1MRS758755 A
Basic functions
76 REC615 and RER615
Technical Manual
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