Siemens 7SJ82 - Write-Protected Settings

Depending on the user philosophy, the reference value could be the system rated voltage (bus voltage), or the
capacitor rated voltage
Parameter: Capacitor element type
•
Default setting (_:14641:106) Capacitor element type = fused
With the parameter Capacitor element type, you set if the capacitor elements contain internal fuses or
not. This information is required in the current-unbalance protection for the fault position annunciation.
Parameter: Blk.cls.cmd.dur.discharge
•
Default setting (_:14641:107) Blk.cls.cmd.dur.discharge = off
With the parameter Blk.cls.cmd.dur.discharge, you set whether closing of the circuit breaker is
blocked automatically or not when a capacitor bank discharges.
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NOTE
If the parameter Blk.cls.cmd.dur.discharge is set to on, the device generates a trip/open command
during the discharge time.
Parameter:
Discharge time
•
Default setting (_:14641:108) Discharge time = 300 s
With the parameter Discharge time, you define capacitor-bank discharging duration. You get the value
from the capacitor manufacturer.
Parameter: Cap.-bank neutral point
•
Default setting (_:14641:109) Cap.-bank neutral point =isolated
With the parameter Cap.-bank neutral point, you can specify whether the neutral point of capacitor
bank is isolated or grounded. This information is required when applying the function 87V voltage differ-
ential protection.
Parameter: P, Q sign
•
Default setting (_:14611:158) P, Q sign =not reversed
The power and energy values are defined by the manufacturer such that power in the direction of the
protected object is considered positive. You can also define the power output by the protected object as posi-
tive. With the P, Q sign parameter, you can invert the sign for these components. This inversion does not
influence any protection function.
Write-Protected Settings
The settings listed here are primarily to aid understanding when configuring the function groups. They are
calculated as a function of other settings and cannot be changed directly.
Addr.
Parameter C Setting Options Default Setting
Rated values
_:14641:103 General:Rated apparent
power
-1.00 MVA to -1.00 MVA 0.00 MVA
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NOTE
You can find more detailed information on the Process monitor in chapter 5.7.1 Overview.
5.4.4
Function-Group Types
5.4 Function-Group Type Capacitor Bank
222 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017