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Vol. 2.6 © 2020 Hanbell Precise Machinery Co., Ltd. All rights reserved
b. Metal sheath of power cable, palpable threading pipe, cable metal trucking, and
cable trays should be grounded.
c. Metal sheath of armored control cable, non-armored or non-metallic sheathed cable
should be grounded.
d. Power cable grounding wire should use copper wire or tinned copper braided wire,
and the cross-sectional area should follow below table:
Power cable (mm2)
Grounding wire(mm2)
120 and lower
16
150 and higher
25
Note
：
Resistance of grounding should not be higher than 8
Ω
.
5.3.6 Insulation for high voltage main terminals
5.3.6.1 Method 1:
After checking the phase sequence and the rotation direction of the motor, insulation
work must be done on main terminals for voltage higher than 6000V.
MATERIALS:
1. LOCKTITE Cleaning liquid
2. 3MSCOTCHFIL gray electrical insulation materials
3. 3MSCOTCHKOTE paints
4. Plastic insulation tapes
HANBELL will not provide the materials above because all of them can be sourced
locally.
Steps
：
1. Shut down the power of the compressor.
2. Clean the dust, water, and oil on terminals by cleaning liquid.
3. Apply 3MSCOTCHFIL gray electrical insulation materials on the joint parts to make it
smooth.
4. Apply 3MSCOTCHKOTE paints on the ceramic parts of power bolts up to 1/2”position.
Apply 3MSCOTCHKOTE on the power bolts where gray electrical insulation materials had
been applied and the on cable for 10”long from power bolts. Then, apply SCOTCHFIL gray
electrical insulation materials on the surface again.
5. Use plastic insulation tapes to stick the whole painting layers.
6. Use 3MSCOTCHKOTE paints again for moisture prevention
5.3.6.2 Method2:
Use Hanbell RITA- CBTM 2050 Heat shrinkable tube and insulate the wiring terminals
with for voltage higher than 6000V.
Materials
：
1. High voltage insulation tapes
2. RITA- CBTM 2050 Heat shrinkable tube
3. Heating by blowlamp
Steps:
1. Put heat shrinkable tube into high voltage cable and tighten R type clip based on
regulation.
2. Move pre-inserted heat shrinkable tube to proper position (The heat shrinkable tube
should cover more than 30mm of white ceramic part of the terminal, and the cable and
terminal joint part is not allowed to be exposed.)
3. Use blowlamp to heat up heat shrinkable tube to make the surface becomes tight.
(Heating temperature is above 110
°
C)
。
