TECHNICAL DATA 1. Current and Time Adjustments Earth-fault Low-set Current (l>) Adjustment • This adjustment is for setting the minimum earth-fault for tripping with time delay. • The setting range is from 0.1A to 2A. Earth-fault High-set Current (l>>) Adjustment • This adjustment is for setting the instantaneous tripping current due to an earth-fault. • The setting range is from 1x to 10x of the earth-fault low-set setting value. l>> = a x l>, a = 1 to 10 • This high-set feature can be disabled by setting the tripping current to infinity ( ' ) Time Multiplier (TM) Adjustment • The time multiplier is for setting the normal inverse time/ current characteristic (IDMT) as according to BS142. • The setting range is from 0.05 to 1.0. 2. Light Indicators The light indicators display the status of the system. IDMT Normal Inverse Curve Indicator AUX l> l>> Status Off Off Off No auxiliary power supply. On Off Off System normal mode. No tripping. On On Off Earth-fault low-set start. On Blink Off Earth-fault low-set tripped. On Off On Earth-fault high-set start. On Off Blink Earth-fault high-set tripped. 3. Push Buttons Reset Button • The reset button is for resetting the light indicators (l> or l>>) after an earth-fault tripping has occured. • To reset, press the reset button once. Test Button • Test button is for checking the relay operation. • Push on the test button to simulate an earth-fault low-set and high-set trip condition. 4. Trip Contacts There is one set of tripping contacts namely, R1. R1 - Manual Reset Type • This contact (R1) is activated during an earth-fault trip. the contacts remain activated regardless of the removal of fault current. This relay can only be reset by pressing the “RESET” button. 5. Electrical Specification Auxiliary Supply MK202A-240A......................198~265 VAC MK202A-110A......................94~127 VAC Supply frequency..................50Hz VA rating...............................3 VA typical Trip Contact Rated Voltage.......................250 VAC Continuous carry...................5A (cos Ï• = 1.0) Expected electrical life..........100,000 operations Expected mechanical life......5 million operations 6. Mechanical Indicators Auxiliary supply....................Green LED indicator Pick-up..................................Red LED indicator Trip........................................Red LED indicator Mounting..............................Panel mounting Front panel...........................Standard DIN 96x96 mm Approximate weight..............0.6 kg