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P O W E R I N G T E C H N O L O G Y
Document Number: MS0031-MAN rev. 7
guardian_access_ms31-man-rev7-0521.indd
Chapter 6 Maintenance & Troubleshooting
6.1 Maintenance
6.1.1 Checking Terminal Connection
The connections on the terminal blocks and circuit breakers must be checked according to
the Table 6-1 at least once a year.
TYPE OF CONNECTION
MODEL / DESCRIPTION
TORQUE
(Nm)
TORQUE
(Inch LB)
Terminal block for rail
AKG 16mm²
2.5
22
Terminal block for rail
AKG 35mm²
3.5
31
Front terminal for copper cables
FC Cu T2 95mm²
7.0
62
Terminal block Weidemullers
WDU 4mm
0.6
5
Terminal block Weidemullers
WDU 10mm
2.0
18
Terminal block Weidemullers
WDU 16mm
3.0
27
Miniature circuit breaker
Siemens
2.5
22
Miniature circuit breaker
Merlin G
3.5
31
Miniature circuit breaker
ABB
2.0
18
Miniature circuit breaker
CBI HY-MAG
3.0
27
Molded case circuit breaker
ABB 160A - S2
5.0
45
Molded case circuit breaker
ABB 160A/250A - S3/S4
9.0
80
Molded case circuit breaker
ABB 630A - S6
9.0
80
Molded case circuit breaker
Terasaki - XS125CJ
9.0
80
Connection unit for 2 or 3 pole breaker Merlin G & Siemens
13.5
120
Terminal Block Phoenix
Phoenix Mini Combicon
0.25
2
Terminal block Phoenix
UK10 / UKLKG10
1.5-1.8
13-16
Terminal block Phoenix
UK16 / USLKG16
1.5-1.8
13-16
Terminal block Phoenix
UK35/UIK35/USKG35/UISKG35 3.2-3.7
28-33
Miniature circuit breaker
Nader
2.5
22
Table 6-1 Connection Torque Setting Check
6.1.2 Other Requirements
At least once a year the output voltage should be verified to be within acceptable limits. The
result of the test should be recorded and filed to see any deviations.
In addition, the system requires periodic inspections and routine cleaning. It is very important
to keep the all areas and components of the system free from dust or other unwanted objects
to ensure free air circulation and safe operation of the system.
