ABB Relion 620 Series - Nonvolatile Memory; Sensor Inputs for Currents and Voltages

Name Type Values (Range) Unit Description
Angle U23B - IL1B FLOAT32 -180.00...180.00 deg Angle phase B to phase
C voltage - phase A cur-
rent (b)
Angle U31B - IL2B FLOAT32 -180.00...180.00 deg Angle phase C to phase
A voltage - phase B cur-
rent (b)
Angle U12B - IL3B FLOAT32 -180.00...180.00 deg Angle phase A to phase
B voltage - phase C cur-
rent (b)
3.9 Nonvolatile memory
In addition to the setting values, the protection relay can store some data in the
nonvolatile memory.
• Up to 1024 events are stored. The stored events are visible in LHMI, WHMI and
Event viewer tool in PCM600.
• Recorded data
- Fault records (up to 128)
- Maximum demands
• Circuit breaker condition monitoring
• Latched alarm and trip LEDs' statuses
• Trip circuit lockout
• Counter values
3.10 Sensor inputs for currents and voltages
This chapter gives short examples on how to define the correct parameters for
sensor measurement interfaces.
Sensors can have correction factors, measured and verified by the sensor
manufacturer, to increase the measurement accuracy. Correction factors
are recommended to be set to the relay. Two types of correction factors
are available for voltage and current (Rogowski) sensors. The Amplitude
correction factor is named Amplitude corr. A(B/C) and Angle correction
factor is named Angle corr A(B/C) . These correction factors can be found
on the Sensor's rating plate and/or sensor routine test protocol. If the
correction factors are not available, contact the sensor manufacturer for
more information.
Basic functions 1MRS757644 H
108 620 series
Technical Manual