M-LB-(Ex-)2000-System – Surge Protection Barriers
Installation
201
9-03
23
3.3
Signal Loops Disconnection for Checking
During commissioning, you can disconnect the signal loops for the following checks.
•
Insulation check of the cable on the unprotected side
•
Check of the signal loops
Disconnecting the Signal Loops
Use a suitable screwdriver for disconnecting.
1. Insert the screwdriver (4) into the groove (5) of the disconnect levers.
2. To disconnect the unprotected side on terminal 3, lift disconnect lever 1 (3)
until the lever reaches its end position.
3. To disconnect the protected side on terminal 2, lift disconnect lever 2 (2)
until the lever reaches its end position.
Figure 3.11
Danger!
Explosion hazard from sparking when using operating elements on devices
with equipment protection level Gc
Using operating elements in a potentially explosive atmosphere can cause sparks
that can ignite the surrounding atmosphere.
Only use operating elements (e. g., switch, slider, button, etc.) in the absence
of a potentially explosive atmosphere.
1
Device
2
Disconnect lever 2 for terminal 2
3
Disconnect lever 1 for terminal 3
4
Screwdriver
5
Groove
4
1
3
2
5
