GFL631T-3 INSTRUMENT TRANSFORMER, GFL631T-3 Datasheet - Page 35

• 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

www.GEMultilin.com
there is a possibility of developing extremely high voltages which could be dangerous to personnel or cause an insulation breakdown.
voltage value, the SCR operates, shorting the C.T. secondary and reducing the voltage to about 2 volts in less than 1/4 cycle. This process repeats each current
polarity reversal. The protection is activated each half cycle.
It can also be connected across the current terminals of a protective relay, meter, or other current operated device without affecting the operation of the
device. Secondary polarity of the C.T’s is not critical to the OCP .
exceeds the voltage clamping limit , the Open Circuit Protector will trigger. After triggering, the voltage will fall to about 2 volts and remain there until the next
zero crossing of the current , waveform at which time the device resets and the cycle repeats as necessary. In the transient mode of protection, triggering will
occur only on the half cycle where the transient appears. The leakage current of the OCP is insignif icant and will not cause a ratio or phase angle error in the
Current Transformer accuracy.
overloads up to 20 times normal (100 amps RMS) for 2 seconds. The OCP is designed to tolerate both of these conditions if the burden accidentally opens.
A Current Transformer secondary should never be open circuited white the Current Transformer primary circuit is energized. If this situation should occur
The OCP series of Open Protectors are voltage sensing devices using high shorting SCR switches. When the secondary peak voltages exceeds the clamping
The three element Open Circuit Protector is Protector is provided with six terminals for connection across the secondary of the C.T’s and parallel with burden.
The OCP also provides protection against high secondary voltage transients, which may damage the burden or secondary winding. If the transient voltage
Metering class C.T.’s with a rating factor of 2 could operate up to 10 amps on a continuos basis. Relaying class C.T.’s are designed to withstand short time
TYPICAL
1 ELEMENT CONNECTION DIAGRAM
1-OCP-XXX
Elements
1 =One Elements
3 =Three Elements
HOW TO ORDER OPEN CIRCUIT PROTECTORS
X - OCP - XXX
Model OCP
TYPICAL
3 ELEMENT CONNECTION DIAGRAM
3-OCP-XXX
Relay Class Protection
100 = C10 Thru C100
200 = C100 Thru C200
400 = C200 Thru C400
800 = C400 Thru C800 (One Element Only)
29