Schrack Technik EM-250 User Instruction

MX TYPE-EM USER INSTRUCTION
Electronic type release (~EM)
W
EM release has four-stage protection of overload, short circuit short-time delay, short circuit
instantaneous protection and earth fault, with real-time current display, protection
parameter information display, fault information display and parameter setting function
Type EM
Over-load long-time
delay protection
Short circuit short-time
delay protection
Short circuit
instantaneous Protection
Earth fault protection
Neutral line protection
Table 1. Protection for power distribution
Setting current
I =I x
r n
6Ir tripping
time T (s)
r
Setting current
I =I x
sd r
Tripping time
T (s)
sd
Setting current
I =I x
i n
Max. tripping
time (ms)
Setting current
I =I x
g n
Tripping time
(s)
Setting current I
rN
Tripping time The same with the other three- phase poles
(s)
1
250 630
0.4~1.0, Stepping 1A
3~18, 1s, Accuracy ±10%
1.5~10, Stepping 1A, OFF, Accuracy ±15%
0.1-0.2-0.3-0.4, Accuracy ±20% or ±40ms
(higher value will be selected)
1.5~12, Stepping 1A, OFF, Accuracy ±15%
60
0.4-0.5-0.6-0.7-0.8-0.9-1.0, OFF, Accuracy
±15%
0.1-0.2-0.3-0.4, Accuracy ±15%
= (0.5, 1)xI ; I =(1.5~10)I
n sdN
OFF
1600
; I =(1.5~12)I ;
rN iN rN