GE Multilin G650, Manual

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5-54 G650 Generator Protection & Control System GEK-113285A
5.4 PROTECTION ELEMENTS 5 SETTINGS
5
Table 5–51: USED MAGNITUDES ACCORDING TO THE POLARIZATION SETTING
The following table shows the management of the element output signals (block and permission) depending on the
Polarization Type
setting.
Table 5–52: OUTPUT SIGNALS MANAGEMENT ACCORDING TO THE POLARIZATION TYPE SETTING
The configuration of the signals required for blocking the Ground overcurrent elements from the signals provided by the
Ground directional element is made at
Setpoint > Relay Configuration > Protection Elements
using inverted operation
signals to block the trip.
For example, to block the ground time delayed elements:
GROUND TOC1 BLOCK = NOT (GROUND DIR1 OP)
GROUND TOC2 BLOCK = NOT (GROUND DIR2 OP)
GROUND TOC3 BLOCK = NOT (GROUND DIR3 OP)
To block the Ground Instantaneous elements:
GROUND IOC1 BLOCK = NOT (GROUND DIR1 OP)
GROUND IOC2 BLOCK = NOT (GROUND DIR2 OP)
GROUND IOC3 BLOCK = NOT (GROUND DIR3 OP)
POLARIZATION SETTING OPERATION MAG. POLARIZATION MAG.
Vo Ig 3V0
Ip Ig Isg
Vo + Ip Ig 3V0 or Isg
Vo * Ip Ig 3V0 and Isg
POLARIZATION SETTING GROUND DIR BLOCK SIGNAL GROUND DIR OP SIGNAL
Vo V
0
< Ajs. POL V THRESHOLD Permission V
0
Ip I
P
< 5 mA Permission I
P
Vo + Ip V
0
< POL V THRESHOLD
I
P
< 5 mA
Permission V
0
Permission I
P
Vo * Ip V
0
< POL V THRESHOLD
I
P
< 5 mA
Permission V
0
Permission I
P