3.1 Strain clamp
3.18.1 Design
Bolted dead-end strain clamps, clevis type, minimum breaking load 70kN, all ferrous parts to be hot-dip galvanized. Suitable for conductor diameter 5 - 14mm complying with the following standards.
DIN 48215 Clamps and connectors for overhead power line
IEC 60228 Conductors of insulated cables
BS 6360 Specification for conductors in insulated cables
BS 03288 Insulator and conductor fittings for overhead power lines
3.18.2. Material
The parts of the clamps shall be manufactured from materials, which withstand the mechanical loads and environmental circumstances. All ferrous parts shall be hot-dip galvanized.
Each clamp shall be marked with the name or trademark of the manufacturer. The markings shall be legible and durable.
3.18.3. Testing
Type and sample tests shall be as per the relevant standard including;
Verification of dimensions
Mechanical test
Electrical test
Galvanizing test
3.1 Stay rod for MV
3.17.1 Standard
Any Standard which fits our design requirements is acceptable.
3.17.2. Material
* To protect corrosion stay rod shall be well hot dip-galvanized.
3.17.3 Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Each and every dimension according to the given drawing.
3.17.4 Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection.
c. Galvanizing test
Stay rod for LV
3.16.1 Standard
Any Standard which fits our design requirements is acceptable.
3.16.2. Material
* To protect corrosion stay rod shall be well hot dip-galvanized.
3.16.3. Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Each and every dimension according to the given drawing.
3.16.4 Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection.
c. Galvanizing test
3.1 Stay plate for MV
3.15.1 Standard
Any Standard which fits our design requirements is acceptable.
3.15.2. Material
* To protect corrosion stay plate shall be well hot dip-galvanized.
3.15.3. Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Each and every dimension according to the given drawing.
3.15.4 Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection.
c. Galvanizing test
3.1 Stay plate for LV
3.14.1 Standard
Any Standard which fits our design requirements is acceptable.
3.14.2. Material
* To protect corrosion stay plate shall be well hot dip-galvanized.
3.14.3 Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Each and every dimension according to the given drawing.
3.14.4 Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection.
c. Galvanizing test
M16, 400mm long bolt nut and washer
3.12.1. Standard
BS 4190 or equivalent is acceptable.
3.12.2. Design
Long bolt nominal diameter (d) 16 mm and lead 2.
Minor threaded diameter (dk) 14mm.
Thickness of head (k) as per BS standard
The nut shall fit long bolt threaded diameter.
Thickness of nut head (m) as per BS standard
Width of head across flats (s) as per BS standard.
Width of head across angle (e) as per BS standard
Washer diameter (d1) as per BS standard.
Thickness of washer as per BS standard.
Inside diameter of washer (h) as per BS standard
To protect corrosion long bolt shall be well hot dip-galvanized.
3.12.3. Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Threads of long bolt shall be according to the design dimension.
* Each and every dimension according to the given drawing.
3.12.4 Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection
c. Galvanizing test
3.1 M16, 300mm long bolt nut and washer
3.11.1 Standard
BS 4190 or equivalent is acceptable.
3.11.2 Design
Long bolt nominal diameter (d) 16 mm and lead 2.
Minor threaded diameter (dk) 14mm.
Thickness of head (k) as per BS standard
The nut shall fit long bolt threaded diameter.
Thickness of nut head (m) as per BS standard
Width of head across flats (s) as per BS standard.
Width of head across angle (e) as per BS standard
Washer diameter (d1) as per BS standard.
Thickness of washer as per BS standard.
Inside diameter of washer (h) as per BS standard
To protect corrosion long bolt shall be well hot dip-galvanized.
3.11.3. Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Threads of long bolt shall be according to the design dimension.
* Each and every dimension according to the given drawing.
3.11.4 Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection
c. Galvanizing test
3.1 Earthing Rod with Clamp
Profiled earthing rods of hot dip galvanized steel with connecting lugs. Cross-section and length of profile shall be 50x50x3 mm and 3 m long, respectively. The earthing rod should also be in accordance with the corresponding drawing of this tender.
Earthing rod clamps suitable for stranded copper conductor of 25-35 mm2.
3.10.1 Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Each and every dimension according to the given drawing.
3.10.2. Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection
c. Galvanizing test
Standard :BS or equivalent is acceptable.
Design
- Small collar nominal diameter (d) 12 mm and lead 2.
- Minor threaded diameter (dk) 10mm.
- Thickness of head (k) as per BS standard
- The nut shall fit small collar threaded diameter.
- Thickness of nut head (m) as per BS standard
- Width of head across flats (s) as per BS standard.
- Width of head across angle (e) as per BS standard
- Washer diameter (d1) as per BS standard.
- Thickness of washer as per BS standard.
- Inside diameter of washer (h) as per BS standard
To protect corrosion small collar shall be well hot dip-galvanized.
3.13.3 Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Threads of small collar shall be according to the design dimension.
* Each and every dimension according to the given drawing.
3.13.4. Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection
c. Galvanizing test
Big collar, type 2
Standard
BS or equivalent is acceptable.
Design
- Big collar nominal diameter (d) 16 mm and lead 2.
- Minor threaded diameter (dk) 14mm.
- Thickness of head (k) as per BS standard
- The nut shall fit big collar threaded diameter.
- Thickness of nut head (m) as per BS standard
- Width of head across flats (s) as per BS standard.
- Width of head across angle (e) as per BS standard
- Washer diameter (d1) as per BS standard.
- Thickness of washer as per BS standard.
- Inside diameter of washer (h) as per BS standard
To protect corrosion big collar shall be well hot dip-galvanized.
. Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
* Threads of big collar shall be according to the design dimension.
* Each and every dimension according to the given drawing.
Testing
The following testing shall be carried out.
a. Visual inspection
b. Size inspection
c. Galvanizing test
Tie Strap
The strap shall have a cross section dimension of 50 x 5 mm
The strap shall have a cross section dimension of 50 x 5 mm.
The strap manufactured for suspension/intermediate assembly according to the given drawing (see the drawing)
Yield strength of tie strap must be 240N/mm2.
To protect tie strap from corrosion it shall be hot dip-galvanized.
Guaranteed Value
The following values are guaranteed by the manufacturers as stipulated by the guaranteed characteristics table
§ Each and every dimension
§ Material strength.
3.7.4. Testing
The following testing must be carried out.
a. Visual inspection
b. Size and dimension verification.
U channel cross-arm for 33kV
Any standard equivalent to GB/T 707 1988, 80x43, 5/8 and 100x48, 5.3/8.5 is accepted.
For suspension, T-off, angle and dead end assembly shall have a cross section dimension of
80 x 43 x 5/8mm
For transformer base U-cross arms shall have a dimension of 100x48x5.3/8.5
U-cross arms manufactured for suspension, T-off, angle, dead end and transformer base
assembly as per the drawing
To protect U-cross arms against corrosion U-cross arms shall be hot dip-galvanized
Yield strength of U-cross arm 240N/mm2
Test for ultimate tensile strength
Test for yield stress
Percentage elongation test
Bend test
Chemical composition test
Galvanization tests thickness of Zn coating
Weight of Zn Coating
Uniformity of Zn coating
Adhesion test of Zn coating
Visual inspection
Weight verification
Dead end hook 382
Hook threaded nominal diameter (A) 16mm
Minor threaded diameter (W) 14
Thickness of nut (M), washer diameter and thickness as per BS standard
Yield strength of pin must be 240N/mm2
LV Hook from corrosion it shall be hot dip-galvanized
Visual inspection
Size inspection
Galvanizing test
Strength test
Suspension hook M16-380
Hook threaded nominal diameter (A) 16mm
Minor threaded diameter (W) 14
Thickness of nut (M), washer diameter and thickness as per BS standard
Yield strength of pin must be 240N/mm2
To protect LV Hook from corrosion it shall be hot dip-galvanized
Testing
Visual inspection
Size inspection
Galvanizing test
Strength test
The following testing shall be carried out
Dead End Clamp ,Anchoring Clamp
The clamps should be designed to Anchor LV AB cable with insulated messenger. The clamp
should anchor/hold the neutral messenger without damaging the insulation.
The clamp should conform to the standard NFC 33041 and 33042 or equivalent. The clamp
body should be made of corrosion resistant Aluminium alloy, bail should be of stainless steel
and self adjusting wedges should be weather and UV resistant polymer.
Anchoring assemblies are used to firmly attach the messenger of ABC to a support and
transmit the mechanical tension at the end of a run or to the supporting structures at a major
change in direction.
neutral messenger should be fixed by an adjustable grip device.
The suspension clamp shall be manufactured from weather and UV light resistant reinforced
nylon and aluminum alloy. The clamp should provide an additional insulation between the
cable and the pole.
Clamps should be fixed with pole by eyehook/bracket. Breaking load should not be less than
15kN
Suspension Assembly is used for supporting an ABC by installation on the messenger at an
intermediate point of support such as a pole. It can accommodate small angles of deviation up
to 30o. The clamp should hold insulated messenger of diameter range from 6mm up to 12 mm.
Visual examination
Dimensional and material verification
Tensile strength
Dielectric voltage test
Climatic & corrosion ageing
Endurance test under mechanical and thermal stresses
Electrical ageing
TYPE:APG-C4
NAME:Parallel groove clamp APG-C4
Specification
Material
|
|
|
Material standard
|
|
|
Range of conductor cross-section
|
16…50/2.5…35
|
|
Range of conductor diameter, Al/Cu
|
mm2
|
|
Tensile strength
|
KN |
5 |
Thickness of zinc coating,
|
mm
|
43 |
Test voltage at 50Hz for one minute in water
|
kV
|
6 |
Al 35-300mm² Size 105*65mm Tri-bolts Bolt M10*60 Weight 560g
Audited Supplier 
){kind=link}
){kind=link}