• Kyongbo Electric Digital Over Current / Ground Over Current / Unbalance Relay GD31-AB17 (50/51, 50N/51N, 50B, 46U)
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Kyongbo Electric Digital Over Current / Ground Over Current / Unbalance Relay GD31-AB17 (50/51, 50N/51N, 50B, 46U)

Kyongbo Electric Digital Over Current / Ground Over Current / Unbalance Relay GD31-AB17 (50/51, 50N/51N, 50B, 46U)

GD31-AB17 is a digital relay based on the KEPCO over current relay technical standard for 345 kV transformer tertiary, 154 kV transformer back-up, 23 kV distribution line, phase modifying equipment and high-voltage feeder protection.

Key features

  • Protects 3-phase 4-wire systems with one relay
  • Output contacts for signal 2a and 2b, no auxiliary relay needed
  • Fault waveform and event recording
  • Various operating time characteristics

Specifications

Control Power AC/DC 110-220 V (free voltage)
Display Character LCD (4 lines x 20 characters)
Communication Modbus RTU, RS-485 1 port (rear), RS-232C 1 port (front)
Event Record Up to 1,024 events
Fault Waveform Record Up to 6 records
Dimensions (W x H x D) 168 x 218 x 250 mm
Weight approx. 5 kg
Applied Standard ES-5945-0001
GD31-AB17 Functions: 50/51, 50N/51N, 50B, 46U | Digital Input: 3 points, AC/DC 110-220 V | Trip Output: 1a x 4, 1b x 1 (16 A at AC 250 V) | Alarm Output: 2a x 5, 2b x 1 (5 A at AC 250 V) | Analog Input: Current 4 circuits, AC 5 A | Burden: < 0.5 VA/phase | Control Power Burden: 70 W max operating, 30 W max standby
Digital Protective RelaysKyongbo Electric
1 product code available in this family
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Kyongbo Electric Digital Over Current / Ground Over Current / Unbalance Relay GD31-AB17 (50/51, 50N/51N, 50B, 46U)

Brand Kyongbo Electric·Digital Protective Relays

Available part numbers (1)

GD31-AB17

How to order

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Product codeSpec
GD31-AB17Functions: 50/51, 50N/51N, 50B, 46U | Digital Input: 3 points, AC/DC 110-220 V | Trip Output: 1a x 4, 1b x 1 (16 A at AC 250 V) | Alarm Output: 2a x 5, 2b x 1 (5 A at AC 250 V) | Analog Input: Current 4 circuits, AC 5 A | Burden: < 0.5 VA/phase | Control Power Burden: 70 W max operating, 30 W max standby

Need a different model, or a part not listed here? Send us your parts list →

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