bus bar tubes | busbar tubing

Switchgear Insulation Products

Busbar Tubes - BUSTUBE

GSC Series Tubes
GSC Series Tubes
Bustube Application
Application of Heat Shrink Bus Bar Tubes

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.

-: FEATURES & BENIFITS :-

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.

Technical Qualification Report : QR 1019

SELECTION CHART

Thin Wall Tube [Up to 3.3KV]

Gala Size
D
d
T (±10% )
Reel length
Rectangular Bars (W+B)
Round Bar Ø

mm(min.)
mm(max.)
mm
mtrs.
Min.
max.
Min.
max.

GSC 16/8
16
8
0.69
100
16
18
10
12

GSC 20/10
20
10
0.78
100
22
25
14
16

GSC 30/15
30
15
0.86
50
33
38
21
24

GSC 40/20
40
20
0.96
50
44
52
28
33

GSC 50/25
50
25
0.96
25
53
65
34
41

GSC 60/30
60
30
0.96
25
64
75
41
48

GSC 70/35
70
35
1.10
25
72
90
46
57

GSC 80/40
80
40
1.27
25
86
100
55
64

GSC 100/50
100
50
1.40
25
104
125
66
80

GSC 120/60
120
60
1.40
25
110
150
70
96

GSC 150/75
150
75
1.40
25
151
190
96
121

GSC 180/90
180
90
1.50
25
179
236
114
150

Medium Wall Tube [upto 24KV]

Gala Size
D
d
T (±10% )
Reel length
Rectangular Bars (W+B)
Round Bar Ø

mm(min.)
mm(max.)
mm
mtrs.
Min.
max.
Min.
max.

GMB 16/6
16
6
1.70
30
11
18
7
12

GMB 25/10
25
10
2.10
25
16
30
10
20

GMB 30/12
30
12
2.10
25
25
38
16
25

GMB 40/16
40
16
2.5
25
33
50
21
32

GMB 50/20
50
20
2.10
25
38
63
24
40

GMB 65/25
65
25
2.20
25
53
82
34
52

GMB 75/28
75
28
2.50
25
63
94
40
60

GMB 85/32
85
32
2.50
25
69
107
44
68

GMB 100/38
100
38
2.50
25
83
126
53
80

GMB 120/45
120
45
2.50
15
104
150
66
96

GMB 150/60
150
60
2.50
25
132
200
84
127

GMB 180/72
180
72
2.50
15
151
226
96
144

GMB 205/85
210
84
2.50
1.5
239
257
152
164

GMB 250/100
250
100
3.0
1.5
264
314
168
200

Heavy Wall Tube [upto 36KV]

Gala Size
D
d
T (±10% )
Reel length
Rectangular Bars (W+B)
Round Bar Ø

mm(min.)
mm(max.)
mm
mtrs.
Min.
max.
Min.
max.

GHB 25/10
25
10
3.20
25
20
28
13
20

GHB 30/12
30
12
3.50
25
28
33
18
25

GHB 40/16
40
16
3.50
25
35
45
22
32

GHB 50/20
50
20
3.50
25
45
54
29
40

GHB 65/25
65
25
3.50
25
50
62
32
43

GHB 75/28
75
28
3.50
20
53
69
34
47

GHB 85/32
85
32
3.50
20
69
100
44
68

GHB 100/38
100
40
3.70
20
83
102
53
72

GHB 120/45
120
58
3.70
15
94
125
60
85

GHB 150/60
150
60
3.70
15
122
168
78
105

GHB 180/70
180
70
3.70
15
160
196
102
125

GHB 205/85
205
85
3.70
1.5
239
250
152
164

GHB 250/120
250
120
4.20
1.5
264
314
168
200

TECHNICAL SPECIFICATION

TEST DESCRIPTION
RECORDED VALUE
TEST METHOD

Physical

Tensile Strength
9 N/mm² (MPA)(min.)
ASTM D638

Ultimate Elongation
350% (Min.)
ASTM D638

Water Absorption
0.5 % (max.)
ASTM D570

Density
1.20 ± 0.2 gm/cm³
ASTM D792

Hardness
45 ± 10 Shore D
ASTM D2240

Thermal

Accelerated Ageing
(150^oC for 1200 Hrs)
ASTM D2671

Tensile Strength
7.7 N/mm² (Mpa) (min.)
ASTM D 638

Ultimate Elongation
300%(Min.)
ASTM D638

Low temperature Flexibility (-40^oC for 4 Hrs.)
No Cracking
ASTM D2671

Heat Shock (250^oC for 30 Min.)
No Cracking or flowing
ESI 09-11

Shrink Temperature
125^oC
IEC 216

Continuous Temperature limit
-40^oC to + 115^oC
IEC 216

Electrical

Dielectric Strength
22 KV/mm. (Min.)
ASTM D149

Volume Resistivity
1 x 10¹³ Ohm.cm(min.)
ASTM D257

Dielectric Constant
5 (Max.)
ASTM D150

Resistant to track & erosion
No Tracking, erosion or flame failure upto 3.25 KV for 20 min.
ASTM D2303

CLEARANCES WITH INSULATION

Voltage
Medium wall Tube (GMB)
Heavy Wall Tube (GHB)
UN-Insulated Bus bars

Ph. To Ph.
Ph. to gr.
Ph. To Ph.
Ph. to gr.

12KV
65
75
35
45
120

17.5 KV
85
105
55
65
160

24 KV
115
150
70
100
220

36 KV
200
285
140
190
320

Switchgear Insulation Products

Busbar Tubes - BUSTUBE

-: FEATURES & BENIFITS :-

SELECTION CHART

Thin Wall Tube [Up to 3.3KV]

Medium Wall Tube [upto 24KV]

Heavy Wall Tube [upto 36KV]

TECHNICAL SPECIFICATION

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