Advertisement
Chapter 2) 7SR158 Technical Manual
Instrument
FREQUENCY METERS
to view
Frequency
Last Trip
VECTOR SHIFT METERS
to view
78
Last Trip
ROCOF METERS
to view
81R ROCOF
Fine
Coarse
Direction
81R ROCOF Last Trip
Fine
Coarse
MAINTENANCE METERS
to view
CB Total Trips
Count
Target
CB Delta Trips
Count
Target
CB Trip Time
Time
GENERAL ALARM METERS
to view
General Alarms
ALARM 1
General Alarms
ALARM 2
General Alarms
ALARM 3
General Alarms
ALARM 4
General Alarms
ALARM 5
General Alarms
ALARM 6
DEMAND METERS
to view
V Phase A Demand
Max
Min
Mean
V Phase B Demand
Max
Min
Mean
Chapter 2 - Page 10 of 16
This is the sub-group that includes all the meters that are
associated with Frequency. TEST/RESET
sub-group.
0.000Hz
Displays the frequency of the last trip
0.000Hz
This is the sub-group that includes all the meters that are
associated with Vector Shift. TEST/RESET
this sub-group.
Va
Displays the phase shift
Vb
Vc
This is the sub-group that includes all the meters that are
associated with the Rate of Change of Frequency (ROCOF)
protection
ROCOF < 2 x setting, measurement more accurate but takes
longer to update
0.000Hz/s
0.000Hz/s
ROCOF
2 x Setting, measurement more coarse but also faster
None
Displays the ROCOF values from Last Trip
0.000Hz/s
0.000Hz/s
This is the sub-group that includes all the meters that are
associated with Maintenance TEST/RESET
this sub-group
Displays the number of CB trips experienced by the CB
0
100
Displays the number of CB trips experienced by the CB
0
100
Displays the circuit breaker trip time to open time. Measured from
CB auxiliary contacts.
0.0ms
This is the sub-group that includes all the meters that are
associated with the Binary inputs TEST/RESET
to this sub-group
Displays the state of General Alarm
Cleared
Cleared
Cleared
Cleared
Cleared
Cleared
This is the sub-group that includes all the meters that are
associated with DEMAND. TEST/RESET
sub-group
Displays the Voltage demand based on Va.
0.00V
0.00V
0.00V
Displays the Voltage demand based on Vb.
0.00V
0.00V
0.00V
Description
allows access to this
allows access to
allows access to
allows access
allows access to this
©2013 Siemens Protection Devices Limited
Advertisement
