Ground Overcurrent Function - Kyongbo Electric GDR-M02 User Manual

Digital Motor Protection Relay (GDR-M02) User's Manual (V1.00)
3.2 Ground Over Current Function
It has the same fundamental and characteristic with 3-Phase Over Current relay
function, and the only differences are that it receives the ground current signal input
and the setting range is smaller than 3-phase Over Current.
There are also instantaneous element and time element in the Ground Over Current
relay function, instantaneous element is marked as INST. OCGR(IOCGR), and time
element is marked as Time OCGR(TOCGR).
Logic Diagram for ground over current element operation is as follows.
【Figure 3.3】 INST.OCGR(IOCGR) Logic Diagram
【Figure 3.4】 Time OCGR(TOCGR) Logic Diagram
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