_DSC35261-1
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Product Details
High Voltage (330kV) Extra Flexible Braided Multi
Stranded Single Phase Earth Lead complete with, Line
end clamp, Earth end clamp and operating pole
sockets made of every special aluminium alloys to
withstand short circuit currents
Insulated Sticks to Class F, IEC standard
Insulated Telescopic Operating Pole Dimension (length) suitable for 330kV Voltage level
A. Earth Rods
The earth rods shall be copper clad steel core rods of 16mm diameter and 1800mm in length. The copper cladding shall be 99.9 per cent pure electrolytic copper and the coating thickness shall be a minimum of 0.25mm. The copper shall be molecularly bonded to the steel. The steel shall be a low carbon steel, grade 43A of BS EN 10137 pt (1 to 3) or equivalent. The steel shall be suitable for driving with a power hammer. The threads shall be rolled on to the rods.
B. Earth Rod Couplings
These shall be of aluminium bronze, counter bored to enclose fully the threads on the rods. The design shall ensure that, when assembled, there shall be direct rod to rod contact when the rod driving force is applied.
C. Earth Rod Driving Head
The driving head shall be of high strength steel, threaded to fit the Earth Rod Couplings. The design shall ensure that there is direct driving head to rod contact when the rod driving force is applied. The driving head shall be suitable for reuse.
D. Earthing Conductor
The following Types of earthing conductors shall be used:
Bare hard drawn stranded copper wire, conductors in the following sizes:
35, 70, and 185mm2
1000V insulated, stranded softdrawn copper wire in the following sizes:
150mm2 and 50mm2.
E. Clamps and Connectors
A full range of clamps and connectors will be required with the earthing material. All clamps and connectors shall be constructed in high strength copper alloy bodies and screws. They shall be suitable for use with the earthing conductor sizes and with the earth rods. The Supplier shall provide a catalogue showing the full range of clamps and connectors on offer together with dimensions in each case.
Exothermic welding connection kits may also be used for connecting the earthing material. The kits shall consist of:
(a) Graphite moulds for right angle, tee and straight through connections
(b) Handle clamp for the moulds
(c) Welding metal powder
(d) Starting flint gun
(e) Mould Scraper
(f) Mould cleaning brush
TECHNICAL DATA SCHEDULE NO. 1
EARTHING RODS
Requirements 1. Length mm 1800
SPECIFICATION
TECHNICAL DATA SCHEDULE NO.2
EARTHING CONDUCTOR (INSULATED)
Item Description Unit Purchaser’s Supplier’s
Requirements Offer
1. Conductor Classification
Product | D Bracket | ||||||
Test Items | Test Content | Test Result | |||||
Sample 1 |
Sample 2 |
Sample 3 |
Sample 4 |
Sample 5 |
Remarks | ||
Visual Inspection | Crack | √ | √ | √ | √ | √ | 1) Passed Mark"√" 2) Not Passed Mark"×" Test Conclusion: |
Stoma Trachoma | √ | √ | √ | √ | √ | ||
Fins | √ | √ | √ | √ | √ | ||
Burr | √ | √ | √ | √ | √ | ||
Galvanizing thickness | μm | √ | √ | √ | √ | √ | 1) Passed Mark"√" 2) Not Passed Mark"×": Test Conclusion: |
Mechanical Characteristics | Mechanical Load | √ | √ | √ | √ | √ | 1)Passed Mark"√" 2)Not Passed Mark"×" Test Conclusion: |
Inspector | Date: 02. March,2011 Approved: |
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