Schrack Technik EM-250 Installation instructions

MX TYPE-EM USER INSTRUCTION
1
W
Electronic type release (~EM)
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
Table 1. Protection for power distribution
Type EM
250
630
1600
Over
-
load long
-
time
delay protection
Setting current
Ir=In x
0.4~1.0, Stepping 1A
6Ir tripping
time Tr(s)
3~18, 1s,
Accuracy
±
10%
Short circuit short-time
delay protection
Setting current
Isd=Irx
1.5~10, Stepping 1A, OFF, Accuracy ±15%
Tripping time
Tsd(s)
0.1
-
0.2
-
0.3
-
0.4, Accuracy
±
20% or
±
40ms
(higher value will be selected)
Short circuit
instantaneous Protection
Setting
current
Ii=Inx
1.5~12, Stepping 1A, OFF, Accuracy
±
15%
Max. tripping
time (ms)
60
Earth fault protection
Setting
current
Ig=Inx
0.4
-
0.5
-
0.6
-
0.7
-
0.8
-
0.9
-
1.0
,
OFF
, Accuracy
±15%
Tripping time
(s)
0.1
-
0.
2
-
0.3
-
0.4
, Accuracy
±
15%
Neutral line protection Setting current IrN= (0.5, 1)xIn; IsdN=(1.5~10)IrN; IiN=(1.5~12)IrN;
OFF
Tripping tim
e
(s)
The same with the other th
ree
-
phase poles

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Table 2. Electronic type rated current
Frame size rated current Inm
A
Rated current In
A
250 32, 63, 100, 160, 250
400 250, 400
630 250, 400, 630
800 630, 800
1600 800, 1000, 1250, 1600
Diagram 1. MX Series Power Distribution Protection EM Controller
Interface and Operation Guide
EM is unit for power distribution.
1. Communication test interface: externally connect the battery box to supply power to
adjust the controller parameters; external communication module or dedicated handheld
test equipment
2. Status indicator. Under normal working status, the green working status indicator flashes.
When the actual current I≥90 %lr, the yellow warning light is on, and when I<90%Ir, the
yellow warning light is off. When the actual current I≥105%Ir, the red overload warning
light is on, when I<105%Ir, the overload warning light is off.
3. Liquid crystal display interface
4. Navigation keys: Up and down keys: page turning, changing status and values
Left button (ESC): return to the previous interface, shift to the left
Right button (confirm button): enter the next layer interface, confirm
Middle button (R): return to the real-time current display interface

MX TYPE-EM USER INSTRUCTION
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Diagram 2. Real-Time current cycle display
Diagram 3. Main menu

MX TYPE-EM USER INSTRUCTION
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A EM Power distribution protection parameter inquiry
For example: MX4, press the “↑” buon in the current display interlace to enter the query
interface
B Fault information query
Press the “↓” key in the current display interface to enter the fault information query
interface, and the fault information can be recorded 3 times.
EM power distribution type smart unit fault type: long-time delay fault, short-time delay fault,
instantaneous fault, ground fault.

MX TYPE-EM USER INSTRUCTION
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C Parameter setting

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C1 EM power distribution protection parameter setting
Enter the adjustment page by “←”, “↑↓” means it can be modified,
“↑” and “↓” to adjust the value, ESC key cancels the change, “←” to save the data after
modification.

MX TYPE-EM USER INSTRUCTION
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C2 Communication parameter setting
C3 System parameter setting
Notes:
1. MX electronic trip unit is suitable for 50Hz/60Hz, rated voltage below 690V.
2. The power supply of the electronic trip unit is powered by the built-in current
transformer. When the main circuit current is ≥0.4In, the electronic trip unit can work
normally.
3. The electronic trip system can view and modify the parameter settings by supplying power
to the controller through an external dedicated battery box or hand-hold test equipment
4. Operating temperature -25 ֯C~ +70 ֯C, storage temperature is -35 ֯C +85 ֯C
Danger, installation and use by electricians only