Tension Clamp For Aluminium Conductor TECHNICAL SPECIFICATION
CROSS ARM CLEVIS
Hot Dip Galvanized
Cross Arm type Clevises are used on
the end of single spool bracket bolt for right angle
pull-off in rural line neutral line constructors.
Secondary Swinging Clevis is used for attaching
to oval eye bolt or eye nut giving a flexible
mounting for equalizing strain at corners.
This specification covers the design and construction of Tension of Tension Clamps to be used for the termination of aluminium-conductors at terminal poles and section poles.
The Clamps are suitable for used in Tropical zone, with a maximum ambient temperature of approximately 40 ºC
and a mean annual temperature of approximately 28 ºC
with high humidity and heavy rainfall.
this specification is make reference to and comply with the requirements of following standard:
BS 3288:1973 - Insulator and Conductor fitting for
Overhead Power Lines
BS 729 - Hot dip Galvanised
3. ELECTRICAL SYSTEM
The Clamps will be designed for use on a 3 phase ,
3 wires ,
50 Hz ,
primary distribution system with the star-point of the source-end transformer earthed through an Earthing Resistor.
4. DESIGN AND CONSTRUCTION
The Clamps are manufactured from material which is not cause chemical corrosion when in constant contact with aluminium conductor. They are have a tensile strength that the breaking strength that are not less than the breaking strength of the conductors to be connected.
The Clamps are properly designed such that will not cause any unnecessary strain and abrasion on the surface of conductors.
5. SIZE OF CLAMPS
The Clamps aredesigned to accommodate the following sizes of Aluminium conductors:
a. 50mm 2
b. 100 - 150mm 2
The Tension Clamps will be indelibly marked as Customer Requirment.
7. INSPECTION AND TESTS
For evaluation purposes, we will supply the following items to our cusotmer
a. A sample of the Tension Clamp complete with all accessories.
b. A copy of the test report on tests conducted in accordance to BS 3288 and BS 729