ABB MNS - Page 113

MNS DTR / MNS Service
107
Konserwacja i części zamienne
Maintena
n
ce
and Spare Parts
5
1.3
General inspection of the switchgear assembly
(withdrawable or plug-in, disconnectable, raila-
ble technique)
1.3.1
Design of conductors and conductor installation
Condition of insulation
2a
1a
X
Measure the insulation
resistance
1.3.2
Check electrical equipment installed
 Bracing
 Check contact corrosion, contact gaps, ionization chamber,
arc splitter, rated currents, settings and tripping
For the complete main-
tenance work, observe
the instructions of the
equipment manufactur-
er
 Minimum creepage distance  12,5 mm
 Check minimum clearance for arcing space
Cf. equipment manu-
facturer
1.3.5
Required protection class
 EN 60529
1.3.6
Check efficiency of protective conductor connection
 Check continuity with signal test apparatus
2a
1a
X
1.3.7
Function test of the control device
 In accordance with circuit diagram
2a
1a
X
Control connection
cable.
1.3.8
Check measuring loops
 In accordance with circuit diagram
2a
1a
X
2.0
Additional checks
2.1
Withdrawable technique
2.1.1
Compact modules (8E/4 + 8E/2)
 Check easy movement of module in compart-
ment
 Remove dust and grease from guide rail if necessary
2 - 3a
1a
X
 Function test of mechanical interlock
 Lubricate with Omnigliss
2 - 3a
1a
X
 Check electrical contact-making
2a
1
1a
1
X
 Main contacts
 Visual inspection
Refer to
 In case of doubt check contact clearance
Chapter 5.5
 Greasing
Refer to chapter 5.6
 Control plugs
 Visual inspection of module compartment
 Remove dust from guide rail with vacuum cleaner
 Actuate limit switch rocker (if available)
 Check condition of mating contacts
Artificial light source
 Check efficiency of protective conductor con-
nection
 Check cam condition at supporting rail
2.1.2
Withdrawable modules  4E
 Check easy movement of module in compart-
ment
 Function test of mechanical interlock
1
Main contact to be checked either according the mentioned time intervals or latest after 100 cycles.