Counts-to-Open
The counts-to-open setting is determined by the position
of the COUNTS-TO-OPEN SELECTOR switch. Switch
positions 1, 2, and 3 correspond to 1, 2, or 3 counts to
open. Normally, this setting is one less than the number
of operations to lockout of the backup protective device.
To change the number of counts-to-open setting, merely
change the position of the rotary switch.
Count Reset
The reset setting is determined by the position of the
COUNT RESET switch. Reset times of 15, 30, 60, 90,
120, and 180 seconds are available. This feature resets
to zero any accumulated counts whenever current
through the sectionalizer flows without interruption for
longer than the time programmed.
The reset feature will operate with any current flow from
minimum load (0.5 A) to values below phase or ground
pickup levels.
Inrush-Current Restraint
The inrush-current restraint feature blocks the phase
and ground actuating levels for three seconds after cur-
rent flow through the sectionalizer is restored and the
overcurrent has been determined to be inrush current.
The three second time interval allows for system inrush
parameters to stabilize prior to allowing the sensitivity of
the sectionalizer to return to its programmed state.
Response Time
For backfed motor contribution and unsymmetrical clear-
ing of upline faults, a response time is built into the sec-
tionalizer control to eliminate unwanted counting of
these situations. Upon detection of any current above
the phase or ground actuating setting, the current must
exceed the response-time characteristics as illustrated
in Figure 7. Total clearing time of reclosers and breakers
must exceed the response-time characteristic of the sec-
tionalizer.
Type GV and GW Installation Instructions
8
0.1
.08
.06
.01
.02
.03
.04
.05
50
60
80
100
200
300
400
500
600
800
1000
2000
CURRENT (percent of minimum actuating current)
TIME (sec)
Figure 7.
Maximum Response-Time Characteristics.
Figure 6.
Operating characteristics of the sectionalizer are pro-
grammed on the printed circuit board in the operator
cabinet.
020061KMA
Counts-
to-open
selector
Count
reset
selector
Test
Point
C
Test Point
D
