MX Series Power Distribution Protection EM Controller

: October 30, 2023
: MX Series

Table of Contents

Documents / Resources
Read User Manual Online (PDF format)
Download This Manual (PDF format)

MX Series Power Distribution Protection EM Controller

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

Table 2. Electronic type rated current

Diagram 1. MX Series Power Distribution Protection EM Controller Interface and Operation Guide

EM is unit for power distribution.

Communication test interface: externally connect the battery box to supply power to adjust the controller parameters; external communication module or dedicated handheld test equipment
Status indicator. Under normal working status, the green working status indicator flashes. When the actual current I90 %lr, the yellow warning light is on, and when I<90%Ir, the yellow warning light is off. When the actual current I105%Ir, the red overload warning light is on, when I<105%Ir, the overload warning light is off.
Liquid crystal display interface
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

Diagram 2. Real-Time current cycle display

Diagram 3. Main menu

A EM Power distribution protection parameter inquiry

For example: MX4, press the “↑” button 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.

C Parameter setting

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.

C2 Communication parameter setting

C3 System parameter setting

Notes :

MX electronic trip unit is suitable for 50Hz/60Hz, rated voltage below 690V.
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.
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
Operating temperature -25 C~ +70 C, storage temperature is -35 C +85 C

Danger, installation and use by electricians only