Monitoring Elements - GE B90 Instruction Manual

5.6 CONTROL ELEMENTS
The wiring connection for two examples above is applicable to both form-A contacts with voltage monitoring and
solid-state contact with voltage monitoring.
NOTE
a) MAIN MENU

PATH: SETTINGS CONTROL ELEMENTS
 MONITORING
 ELEMENTS
b) CT TROUBLE ZONE

PATH: SETTINGS CONTROL ELEMENTS
 CT TROUBLE ZONE 1
5

The CT Trouble feature is available only when
This element uses the differential current calculated in accordance with the bus configuration programmed under Bus Zone
1. Operation of this element is therefore completely dependent on the dynamic bus replica, which must be defined first. The
bus differential zones are defined using the path
CT problems in any of the circuits actually connected to the differential zone defined as Bus Zone 1.
The
CT TROUBLE ZONE 1 PICKUP
ferential current in a given phase remains above this level for the time interval defined by the
setting, CT Trouble is declared for the given phase by setting the appropriate FlexLogic™ output operand. The operand
may be configured to raise an alarm and block the bus differential function for the corresponding zone of protection.
5-114


MONITORING ELEMENTS

 CT TROUBLE ZONE 1

 CT TROUBLE ZONE 2
MESSAGE

 CT TROUBLE ZONE 3
MESSAGE

 CT TROUBLE ZONE 4
MESSAGE

 BUS REPLICA
MESSAGE


MONITORING ELEMENTS
CT TROUBLE ZONE 1
FUNCTION: Disabled
CT TROUBLE ZONE 1
MESSAGE
PICKUP: 0.100 pu
CT TROUBLE ZONE 1
MESSAGE
DELAY: 1.0 s
CT TROUBLE ZONE 1
MESSAGE
TARGET: Self-reset
CT TROUBLE ZONE 1
MESSAGE
EVENTS: Disabled
PRODUCT SETUP
SETTINGS
setting specifies the differential current level that defines an abnormal bus state. If the dif-
B90 Low Impedance Bus Differential System
See page 5–114.
See page 5–114.
See page 5–114.
See page 5–114.
See page 5–115.

CT TROUBLE ZONE 1(4)
Range: Disabled, Enabled
Range: 0.020 to 2.000 pu in steps of 0.001
Range: 1.0 to 60.0 s in steps of 0.1
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
 
B90 FUNCTION B90 FUNCTION
  . The CT Trouble element 1 detects
SYSTEM SETUP BUS
5 SETTINGS
5.6.5 MONITORING ELEMENTS
is set to "Protection".
CT TROUBLE ZONE 1 DELAY
GE Multilin