I-GARD GCHK-100 Instruction Manual
8
For a ground check trip condition only, the GCHK-100 TRIP relay, and its auxiliary relay, may be automatically
reset upon the removal of the fault condition without operator intervention. Otherwise all relays are manually
reset by pressing the RESET push buttons on the relay or on the remote indicators.
ground fault
The GCHK-100 is set-up by DIP switches for different modes of operation and Trip Levels.
The ground fault pickup settings are set using switches 1, 2, 3, and 4 on DIP Switch 2.
The following pickup settings are available:
Table 7.2 GROUND faUlT piCkUp SeTTiNGS
function
Setting
1
2
3
4
5
6
7
Switch2
0.25 A
0
0
0
0
Ground Fault
0.25 A
0
0
0
0
Pickup
0.5 A
0
0
0
X
Settings
0.75 A
0
0
X
0
IG
1 A
0
0
X
X
1.25 A
0
X
0
0
1.5 A
0
X
0
X
2 A
0
X
X
0
2.5 A
0
X
X
X
3 A
X
0
0
0
5 A
X
0
0
X
7.5 A
X
0
X
0
10 A
X
0
X
X
12.5 A
X
X
0
0
Note:
X indicates switch is on.
Pickup Setting Tolerance: -15% / + 0% (in accordance with UL, CSA and IEC requirements)
When a Ground Fault is detected, two relays are operated i.e. the main TRIP relay (Form Z)
and an auxiliary relay with form C contacts.
ground fault trip delay
Switches 5, 6, 7 on DIP Switch 2 are used to select the Ground Fault Trip Delay (See Table 7.3) This is the
interval between detecting a fault and tripping the relay. The delay will be cancelled if the fault clears before the
delay expires, thus preventing unnecessary trip operation.
Содержание GCHK-100
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