v
oltage Monitoring Relays
GKRC - DGRC - MCC Series
General
GKRC type over and under lover voltage monitoring relays are
designed to protect single phase or three phase systems from
voltage variations and phase sequence failure.
Note: These relays include the feature of switching OFF
immediately
if any of the phases exceed (or reduce from)
the nominal voltage by 50%.
OGRC type under voltage monitoring relays are designed to
protect single phase or three phase systems from lasting
under voltage variations.
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GKRC-01
GKRC-20F
GKRC-02FA
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GKRC-02
GKRC-02F
GKRC-02FA
GKRC-03
GKRC-03F
GKRC-M2
MCC-1D
MCC-30
5-15 min. Delay-Off
GKRC-20F
Operating Principle
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The relay is directly connectedto the networkand the required underlover
voltage limit is adjustableby knobs.When the monitoredvoltages of all 3-phase
are within the preset limits,then the output relay switchesON. Faultytripping
operationseffectedfrom instantaneousvoltage peaks are preventedwith the
adjustabledelayedtripping between0,1 and 10 seconds. If any of the monitored
SPECIFICATIONS
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GKRC-01
5-15 min. Delay-Off
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DGRC-01
Non-flammable enclosure
Rail-mounted or flush-mounted
Protection Degree: IP20
Ambient Operating Temperature: -5"C, +50"C
lEe 60255-3, lEe 60255-6, iec 60870-5, lEe 60529
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230VAC,
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230VAC±10%
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Under Voltage Setting Range
Over Voltage Setting Range
Instant Tripping Value
Instant Tripping Time
Output Contact
Delay Time'
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Dimensions
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phase voltages exceed the set value, delay time starts count. If any of the phase
voltages exceed 1,5xUn, the relay switches OFFwithout delay (within less than
500msec.). If any of the phase voltages falls below O,5xUn,the relay switches
OFF without delay (within less than 500 ms.) Ifthe voltage value retums within
preset limits before the end of counting time, the delay time ends and relay
continues to its normal operation.
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Ambient Temperature/Humidity
Over VOlfage C'ategory ~ ,
77
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Print Date: 03.2013
Connection Diagram
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GKRC-02
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GKRC-Ol
GKRC-02
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Two Phase
Connection Diagram
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Connection Diagram
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78
Print Date: 03.2013
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