GE F650 Instruction Manual page 216

5 SETTINGS
67SG Block (SENS GND DIR1 BLOCK): It indicates that the element is blocked by digital input or because the Operation
magnitude (In current), or the Polarization magnitude (Vn voltage and/or Ip current) level is too low.
67SG Operation (SENS GND DIR1 OP): It indicates that the directional element is giving permission, the operation
magnitude and the polarization magnitude conditions are met, or in case of having selected Permission in the Block Logic
setting, it indicates that the element allows operation under block conditions.
Table 5–62: SENSITIVE GROUND DIRECTIONAL SIGNALS
Configuration of the required signals for blocking the sensitive ground overcurrent elements from the signals provided by
the sensitive ground directional elements is performed at Setpoint > Relay Configuration > Protection Elements. This is
done using the inverted operation signals to block the trip, as shown in the following example:
For example, to block sensitive Ground time overcurrent elements, use the following signals:
SENS GND TOC1 BLOCK = NOT (SENS GND DIR1 OP)
SENS GND TOC2 BLOCK = NOT (SENS GND DIR2 OP)
SENS GND TOC3 BLOCK = NOT (SENS GND DIR3 OP)
To block Ground instantaneous elements:
SENS GND IOC1 BLOCK = NOT (SENS GND DIR1 OP)
SENS GND IOC2 BLOCK = NOT (SENS GND DIR2 OP)
SENS GND IOC3 BLOCK = NOT (SENS GND DIR3 OP)
To block isolated Ground elements:
ISOLATED GND1 BLK = NOT (SENS GND DIR1 OP)
ISOLATED GND2 BLK = NOT (SENS GND DIR2 OP)
ISOLATED GND3 BLK = NOT (SENS GND DIR3 OP)
GEK-106310AB
SENS GND DIRECTIONAL
SENS GND DIR1 BLOCK
SENS GND DIR1 OP
SENS GND DIR2 BLOCK
SENS GND DIR2 OP
SENS GND DIR3 BLOCK
SENS GND DIR3 OP
F650 Digital Bay Controller
5.4 PROTECTION ELEMENTS
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