Installation - WEG VBWC Serie Instrucciones De Instalación

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5 INSTALLATION

CAUTION!
1. VCB life span and performance can be guaranteed when periodic visual inspection and maintenance are in place.
„ It shall be kept clean by removing the foreign objects around or inside switchgear.
„ Corrective action shall be taken in advance to limit any dust and high humidity since they may result in unexpected
faults or accidents.
„ Switchgear door shall be well closed to prevent any kinds of animals goes into the switchgear and cause accidents.
„ Sufficient effort shall be made to maintain it in a dry condition if it is installed in presence of high humidity or during
the rainy season. Humidity is fatal to electricity.
„ Check if the cables or bars connected in the VCB presented fail in the isolation.
The corrective action shall be taken if the installation place has a higher or lower temperature than specified operating range.
„
2. Any incident or damage resulting from customers neglect or mistake will void the warranty.
WARNING!
1. Installing VCB at outdoor switchgear.
„ Extra care shall be taken to avoid condensation on the surface of VCB insulating materials by suitable ventilation or
inner heating.
„ Use after performing Insulation resistance or dielectric strength test. (More than one time per quarter).
The reduced dielectric strength can be a major factor causing short-circuit.
For safe and normal operation of circuit breaker installed in switchgear, a very careful and special installation
should be followed.
„ Handle with care when raising up by lift, etc. because circuit breaker lurches;
„ When installing a fixed type of circuit breaker into switchgear, fix the contactor with same torque value
by passing through mounting holes (6-Ø14) after inserting spring washers into head of bolt without high
pressure or alteration;
„ Take care not to apply pressure or permanent tension by bus bars or others to main bus terminals;
„ Remove dust or other foreign substances;
„ When bolting, follow the recommended torque value specified in Table 5.1.
WARNING!
1. When making bolts and screw assembling, follow the instruction with recommended torque values.
Otherwise, may result in over-heat or burns.
2. Do not alter the control circuit at one's discretion.
Otherwise, may cause of malfunction or damage to products.
Size of bolt
M 3
M 3.5
M 4
M 5
M 6
M 8
M 10
M 12
10 | Vacuum Circuit Breaker
Torque
7.3 (6.2 - 8.4)
11.2 (9.5 - 12.9)
16.8 (14.2 - 19.3)
33.0 (28 - 37)
56.0 (48 - 65)
135 (115 - 156)
270 (230 - 310)
470 (410 - 540)
Table 5.1: Torque value
Steel
(kgf·cm )
Brass
(kgf·cm)
4.3 (3.7 - 4.9)
6.6 (5.6 -7.6)
9.8 (8.4 - 11.3)
19.1 (16.2 - 22.0)
33.0 (28 - 38)
89 (68 - 91)
159 (135 - 182)
270 (230 - 310)