
Digital Overcurrent & Ground Overvoltage & Selective Ground Relay (GDR-AEF01) User's Manual
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Kyongbo Electronics Co., Ltd.
1.
General Features
This Relay contains Relay elements of OCRx2, OVGRx1, and SGRx1 at the same
time, and is a Digital arithmetic relay designed and manufactured appropriately
applicable to protect the equipment and electrical lines by detecting and blocking the
circuit or alarming when an accident caused by non-ground system or short circuit in
resistance ground system or overcurrent by overload or grounding accident between
electrical cable and the grounding accident caused by insulation heating of electrical
equipment or destruction, so it is not just easy to change the operation time and
operation current, but it can also record and store fault information thereby greatly
enhancing the reliability of the cable line, and the main characteristics are as follows.
Features
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Total arithmetic type over-current, ground overvoltage, and selective ground Relay.
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Variety of timing characteristics
- OCR : 7 time characteristics included
- OVGR : instantaneous, inverse, definite time characteristics included
- SGR : inverse and definite time characteristics included
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Duration of maintaining output contact is 0.00 ~ 60.00Sec (0.01Sec Step), and
variable setting is possible.
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Set value and measured values are Displayed digitally through LCD Screen. (4 x
20 LCD Screen)
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Enhance reliability with surveillance function at all times.
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Free selection of frequency Settings according to the rated frequency of the line.
(50 / 60Hz)
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Possible to set each of 7 Relay contact output (T/S Output) to 12 modes, and all
of these can be used for Alarms.
- contact for Trip(1a), contact for Signal(6a)
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Reliability is increased by the operation through output contacts when the Relay is
in abnormal state.
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Convenient PC Applications
- SetGDRSeries : change setting values, verify the measurements, verify Fault
information, display status, Remote Reset.
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Possible to self-test through manual Trip command(Contact Test)
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Maintains thorough security using password input when changing setting values
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Various communications supported
- Communication Methods : RS-232C, RS-485C (SCADA communications)