Compensation Mode - Hitachi Relion 650 Series Technical Manual

Section 12
Monitoring
Table 244: Compensation signal inputs for measured parameters
Measured parameter
Idle time, based on
mechanical status
Idle time, based on
primary current or load
voltage signals
Control voltage
Temperature
Drive pressure
Spring charge, analog
measurement
Spring charge, based
on binary range
indication signals
Spare 1
Spare 2
Only one of the idle time compensation channels, viz. status based or current based, is used for
calculating the final compensation value. The selection is made by the IdleTimeInpSel setting.
12.16.7.1

Compensation mode

Depending on the number of sensors available for a given parameter, and on the circuit breaker
operations to be controlled (or compensation characteristics available), the respective value for
CompModeSel defines the compensation mode applied to that parameter. See
Switchsync PWC600, this selection can be made automatically by SST.
Table 245: Compensation mode for each parameter
Number of sensors
0
(Any)
1
1
1
3 (one per CB pole)
3 (one per CB pole)
3 (one per CB pole)
With three sensors enabled, individual compensation values are processed for each CB pole. With
only a single sensor input enabled, the compensation value on the input for breaker pole L1 is used
for all three poles.
244
Quantity of inputs for closing
time and opening time
compensation
3 + 3
3 + 3
1 + 1
3 + 3
3 + 3
3 + 3
3 + 3
3 + 3
3 + 3
Compensate closing times Compensate opening times
-
No
Yes
No
Yes
Yes
No
Yes
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Remarks
Mechanical status is derived from CB auxiliary
contacts
CB status is detected as closed if current is flowing (I >
IDead) or load voltage is present (UL > Udead), and
open otherwise
Control voltage is measured from IED's power supply
input
Requires external acquisition device, supplying
measured values via IEC 61850 GOOSE messages
Requires external acquisition device, supplying
measured values via IEC 61850 GOOSE messages
Requires external acquisition device, supplying
measured values via IEC 61850 GOOSE messages
For example, obtained from spring limit switches
indicating OCO-block or CO-block conditions
For user defined sensor signals. Requires external
acquisition device, supplying measured values via IEC
61850 GOOSE messages. Alternatively, internally
calculated analog signals can be used.
For user defined sensor signals. Requires external
acquisition device, supplying measured values via IEC
61850 GOOSE messages. Alternatively, internally
calculated analog signals can be used.
-
No
No
Yes
Yes
No
Yes
Yes
1MRK 511 557-UEN Rev. A
GUID-61A1575E-523A-4D9E-AEE3-16C60D0F621B v2
Table 245. In
CompModeSel setting
Disable O&C
Disable O&C
Enable C1Sensor
Enable O1Sensor
EnableO&C1Sensor
Enable C3Sensor
Enable O3Sensor
EnableO&C3Sensor
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