GFL631T-3 INSTRUMENT TRANSFORMER, GFL631T-3 Datasheet - Page 26

• Manufacturer Part Number: GFL631T-3
• Description: GROUND FAULT CURENT
• Manufacturer: INSTRUMENT TRANSFORMER

Specifications of GFL631T-3

• Accuracy: 15%
• Current Measuring Range Ac: 30A To 360A

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power will already be applied to the AP VR and there is no time delay in operating.
relay to trip. If the relay is re-energized and the phase sequence is incorrect the relay will not operate.
manual reset by removing the external jumper. Automatic reset means that upon fault removal the device reset automatically to perform is mounting
function. For manual reset simply remove the jumper and connect a normally open pushbutton across terminals 6 and 7.
out . This is normal and indicates that line power is present but a fault condition has been detected. The output contacts will remain in their de-energized
failsafe state.
the green indicator light will go out and three seconds later the relay contacts revert to their de-energized state. This three second delay prevents nuisance
tripping of the APVR.
approximately three seconds after power is restored. In the manual reset mode the reset pushbutton must be pressed.
“Failsafe ” operation is achieved by the following features:
If the power conditions are normal, 3 seconds after power is supplied to the APVR the contacts will transfer, permitting operation. In normal applications, this
The correct phase sequence must be established upon initial installation for proper operation of the relay. Any subsequent change in phase will cause the
The device is shipped from the factory in the automatic reset mode with a jumper on terminals 6 & 7. Operation can be changed from automatic reset to
Upon application of power the green LED indicator will illuminate. If a fault exists the green LED will remain illuminated for these three seconds and then go
If no fault exists upon application of power the green LED indicator illuminates and three seconds later the relay contacts transfer. Upon detection of a fault ,
In service the line voltage to the device may be interrupted on various occasions. In the automatic reset mode the device will resume its monitoring function
1) The relay is energized and the output contacts are transferred under “ normal ” conditions only.
2) Should the output relay itself fail or in the event of internal circuit failure, the relay will revert to the de-energized position.
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APVR Typical Wiring Diagram
Applications Notes
UNBALANCE CALCULATION
EXAMPLE:
ØA - ØB = 240V; ØB - ØC = 220V; ØC - A 215V; AVERAGE = 225V
MAX DEVIATION FROM AVERAGE = 240 - 225 = 15V
% UNBALANCE = 15 X 100 = 6.67%
MAX DEVIATION FROM AVERAGE
Model APVR
AVERAGE
225
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Europe, Middle East , Africa
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X 100 =% UNBALANCE
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