SecoGear – Installation, Operation and Maintenance Manual 28 of 56
PART 1: BUS BARS, 5 KV OR 15 KV
Apply the appropriate number of layers of high-voltage tape 4
or 5 (2” or 4” wide), mastic side down, at medium tension, to bus
bars per Figure 4-10.
PART 2: TAPED JOINTS, 5 KV OR 15 KV
Step A: Filler, 5 kV or 15 kV
Apply three (3) layers – one-half lap of high-voltage tape (2”or 4”
wide), mastic side-down at medium tension over all bolt heads,
nuts, bars, or splice plates to form a smooth surface for taping.
Any bars with sharp burrs and edges must be deburred and
smooth before applying tape.
Step B: Outer Wrap, 5 kV or 15 kV
Apply two (2) layers – one-half lap of high voltage tape (2” wide),
mastic side-down, maintaining a medium tension on the tape
while wrapping. Begin the wrap away from the joints, overlapping
the adjacent insulation, (epoxy fluid, dip, thermoplastic sleeving,
cable, or tape) by 3” minimum. When completing the wrapping of
the joint, do not keep tension on the last 2” or 3” of tape. These
last few inches should be laid in place without tension to prevent
the tape end from lifting. No other taping or paint is required.
*Note: Apply 3 layers - 1/2 Lap for conductors passing thought C.T’s
* Electrical grade rubber-based putty 0282A3529 P008 in roll form will be used to grade voids and smooth out sharp edges of joints. This putty has no insulation value.
1-Roll is 1/8” x 1 1/2” x 5ft. LG.
High voltage insulating tape 0282A3529 p004 roll is .030” x 2” x 30’ LG. Apply with mastic side down.
Medium tension thins a 0.030” x 2” tape to approx. 0.024” x
1.75”. A 0.030” x 4” tape thins to approx. 0.024” x 3.5”.
NOTICE
Figure 4-10: Tape Bus Bars
Figure 4-11: Tape Dead-end Bus Joint
BAR SIZES
INSULATION RANGE
NUMBER OF LAYERS
TAPE
WIDTH
3/8 X 2
1/4 X 3
1/2 X 3
1/4 X 4
1/2 X 4
1/4 X 6
1/2 X 6
1/4 X 2
1/8 X 3
3/8 X 3
3/8 X 4
5/8 X 4
3/8 X 6
5/8 X 6
600 to 5,000V
1 Layer
2”
4’
5’
6’
8’
9’
11’
12’
1/2 Lap*
4”
2’
3’
3’
4’
5’
5’
6’
5,001 to 15,000V
2 Layers
2”
9’
11’
12’’
18’
19’
23’
24’
1/2 Lap*
4”
5’
6’
6
9’
10’
11’
12’
APPROX. NO. ROLLS PER JOINT OF H.V. TAPE
INSULATION LEVEL
INNER FILLER “A”
OUTER WRAP “B”
“C”
2” OR 3” BARS OR TUBES
4” OR 6” BARS
5 or 15KV
R.B. Putty* & 3-Layers
Tape
3-Layers Tape
3”
1/4 Roll Putty*
1/2 Roll
Tape
1/2 Roll Putty*
1 Roll
Tape
Table 4-1: Tape Bus Bars
Table 4-2: Tape Dead-end Bus Joint
