Name Type Values (Range) Unit Description
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 Non-volatile memory
In addition to the setting values, the IED can store some data in the non-volatile
memory.
• Up to 1024 events are stored. The stored events are visible in LHMI and
WHMI only.
• Recorded data
• Fault records (up to 128)
• Maximum demands
• Circuit breaker condition monitoring
• Latched alarm and trip LEDs' status
• Trip circuit lockout
• Counter values
1YHT530004D05 D Section 3
Basic functions
615 series 77
Technical Manual
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