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MK203A IDMT Overcurrent Relay User's
Guide
A BRIEF OVERVIEW
h
g
f
a - Auxiliary power supply indicator
b - High-set start/trip status indicator
c - Low-set start/trip status indicator
d - Overcurrent high-set adjustment
e - Trip reset button
f - Test button
g - Overcurrent low-set adjustment
h - Time multiplier adjustment
a
b
c
d
e
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Summary of Contents for Mikro MK203A
- Page 1 MK203A IDMT Overcurrent Relay User's Guide A BRIEF OVERVIEW a - Auxiliary power supply indicator b - High-set start/trip status indicator c - Low-set start/trip status indicator d - Overcurrent high-set adjustment e - Trip reset button f - Test button...
- Page 2 TECHNICAL DATA 1. Current and Time Adjustments Overcurrent Low-set Current (l>) Adjustment • This adjustment is for setting the minimum overcurrent for tripping with time delay. • The setting range is from 2A to 6A. Overcurrent High-set Current (l>>) Adjustment •...
- Page 3 • This contact (R1) is activated during an overcurrent 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 MK203A-240A......198~265 VAC MK203A-110A......94~127 VAC Supply frequency....50Hz VA rating.......3 VA typical Trip Contact Rated Voltage.......250 VAC...
- Page 4 7. Connection Diagram a) Overcurrent relay MK 203A a) Combined IDMT overcurrent and earth fault relays MK 203A MK 202A 8. Case Dimensions 110mm 90mm 100mm 9 6 mm Fr o n t...
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