HEAT SHRINK BUS BAR TUBE
CLEA
RA
NC
E W
ITH
INSU
LAT
ION
85
115
200
65
105
150
285
75
55
70
140
35
65
100
190
45
160
220
320
120
VOLTAGE UN-INSULATED BUS BARS (mm)
MEDIUM WALL TUBE (GMB)PH. TO PH (mm) PH TO GR.(mm)
HEAVY WALL TUBE (GHB)PH TO PH.(mm) PH TO GR.(mm)
17.5 KV
24 KV
36 KV
12 KV
Therm
al
01. Accelerated ageing 120 C for 500 hrs ASTM D2671
2 a. Tensile Strength 10 N/mm (Mpa) (min.) ASTM D638
b. Ultimate Elongation 250 % (min.) ASTM D638
2. Low Temp. Flexibility No Cracking ASTM D26710
(-40 C for 4 hrs)
03. Heat Shock (250 C for 30 min.) No cracking or flowing ESI 09-11
04. Shrink Temperature 125 C IEC 216
0 05. Continuous Temp. Limit -40 to +115 C IEC 216
Ele
ctr
ical 1. Dielectric Strength 22 KV/mm.(min.) ASTM D149
142. Volume Resistivity 1 x 10 Ohm.cm min ASTM D257
3. Dielectric constant 5 (max.) ASTM D150
flame failure up to
3.25 KV for 20 min.
4. Resistant to track & erosion No Tracking, erosion or ASTM D2303
Physi
cal
TEST DESCRIPTION RECORDED VALUE TEST METHOD
21. Tensile Strength 12 N/mm (MPA) (min.) ASTM D638
2. Ultimate Elongation 300% (min.) ASTM D638
3. WaterAbsorption 0.5% (max.) ASTM D570
34. Density 1.20 ± 0.2 gm/cm ASTM D792
5. Hardness 45 ± 10 shore D ASTM D2240
TEC
HN
ICA
L S
PEC
IFIC
AT
ION
-: F
EAT
UR
ES &
BEN
IFIT
S :
- Reduce Busbar clearance.
Prevent Busbar from chemical corrosion effected
by strong acid, alkali, salt etc.
Solve the problem of insulation among Busbar in
Bus Duct.
Halogen free, flame retardant.
High dielectric strength.
Highly Flexible for use on straight or angled bars
without creasing.
Application ofHeat ShrinkBus Bar Tubes
Technical Qualification Report : QR 1016
Bus Tube is heat shrinkable tube designed to insulate busbar systems up to 36KV & to protect against accidental flashover. The tubes
are manufactured from high quality non tracking crosslinked polyolefin material. Meets ANSI C37.20.2 standards for MV switchgear
application up to 36 KV.
GMB / GHB Series TubesGSC Series Tubes
RoHSREACHCompliance
BUS BAR SELECTION CHART
16 6 30 11 18 7 12GMB 16/6
GMB 25/8
GMB 30/12
GMB 40/16
GMB 50/20
GMB 75/28
GMB 85/32
GMB 100/38
GMB 120/45
GMB 150/60
GMB 180/72
GMB 210/84
GMB 250/100
25
30
40
50
75
85
100
120
150
180
210
250
8
12
16
20
28
32
38
45
60
72
84
100
2.0
2.5
2.5
2.5
2.5
3 .0
3 .0
3 .0
3 .0
3 .0
3 .0
3 .0
3 .0
25
25
25
25
25
25
25
15
25
25
20
20
16
25
33
38
63
69
83
104
132
151
239
264
30
38
50
63
94
107
126
150
200
226
257
314
10
16
21
24
40
44
53
66
84
96
152
168
20
25
32
40
60
68
80
96
127
144
164
200
Medium Wall Tube [Upto 24KV]
GHB 25/8
GHB 30/12
GHB 40/16
GHB 50/20
25
30
40
50
8
12
16
20
3.7
4 .0
4 .0
4 .0
25
25
25
25
20
28
35
45
28
33
45
54
13
18
22
29
20
25
32
40
Heavy Wall Tube [Upto 36KV]
Thin Wall Tube [Up to 3.3KV]
GSC 20/10
GSC 16/8
GSC 30/15
GSC 40/20
GSC 50/25
GSC 60/30
GSC 70/35
GSC 80/40
GSC 100/50
GSC 150/75
GSC 180/90
20
16
30
40
50
60
70
80
100
150
180
10
8
15
20
25
30
35
40
50
75
90
0.78
0.69
0.86
0.96
0.96
0.96
1.10
1.27
1.40
1.40
1.50
100
50
50
25
25
25
25
25
25
25
100
22
16
33
44
53
64
72
86
104
151
179
25
18
38
52
65
75
90
100
125
190
236
14
10
21
28
34
41
46
55
66
96
114
16
12
24
33
41
48
57
64
80
121
150
mm (max.) mm mtrs . min . max. min. max. mm (min .)
Gala Size d Reel length Rectangular Bars(W+B)
D Round BarT (+10% )
Te
ch
nic
al
Dra
win
gs
W W
BOR
B
GMB 65/25 65 25 2.7 25 53 82 34 52
GHB 75/28
GHB 85/32
GHB 100/40
GHB 120/58
75
85
100
120
28
32
40
58
4.0
4.0
4.2
4.2
20
20
20
15
53
69
83
94
69
100
102
125
34
44
53
60
47
68
GHB 65/25 65 25 4.0 25 50 62 32 43
72
85
GHB 205/85
GHB 250/120
205
250
85
120
4.2
4.2
15
15
239
264
250
314
152
168
164
200
GHB 150/60
GHB 180/70
150
180
60
70
4.2
4.2
15
15
168 122
196 160
78
102
105
125