www.morssmitt.com/rms
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Page 9
Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23
Example Schematic
The following typical schematic shows how the 1S20 may be wired to direct trip a circuit breaker
tripping.
CIRCUI T BREAKER
TRIP COI L
+ POS
1S20
CIRCUI T BREAKER SHOWN IN THE
OPEN POSITION AND RELAY SHOWN
IN THE DE-ENERGI SED STATE
52a
12 2 4 6
+ NEG
A rc F ault
Trip 1
A rc F ault
Trip 2
Fail A larm
S ens or
Input s
A rc S ens or 1
Comm on
A rc S ens or 2 & 3
10
9
8
11 1 3 5
