Basic knowledge of power fittings

The widely used iron or aluminum metal accessories for transmission lines are collectively referred to as fittings. There are various types of gold fittings and their uses vary. For example, various wire clips for mounting wires, various kinds of hanging rings for forming insulator strings, various crimping tubes for connection wires, repair tubes, and various types of spacer rods on split wires And so on, as well as the various types of cable fittings used in poles and towers, as well as the size of the protective conductors, must be compatible with each other.
Most of the fittings need to withstand large pulling force in operation, and some must also ensure good electrical contact. It is related to the safety of wires or towers. Even a single damage may cause line failure. Therefore, the quality, correct use and installation of fixtures will have a certain impact on the safe transmission of power lines.
Tooling term 1 General term Electric power fitting. Connects and combines various types of devices in a power system to transfer mechanical, electrical loads and metallic accessories that act as a shield.
Line power fittings. Power fittings used on overhead power lines.
Substation fittings Substations and power fittings for power plant distribution equipment.
Bus-bar fitting Power transformers for substations and power plant busbars.
Failure load According to the specified test method, when subjected to a mechanical load, the load value at any part of the test specimen is destroyed.
Nominal failure load Nominal failure load The minimum damage load specified by the design.
Maximum working strength maximum designed strength.
If the slide slip test load cannot continue to rise, relative displacement occurs between the wire and the clamp or splice tube.
Grip grip strength The maximum load value that the wire does not slip in the wire clamp or splice tube.
Visible corona visval corona Under the specified conditions, with the naked eye can see the corona phenomenon of the product under test.
Nominal value is used to identify a suitable approximate value for a component, device or device.
Temperature rise The difference between the temperature at a certain point and the reference temperature.
2 Product Name Suspension clamp Suspension clamp
Used for suspending or supporting wire, mainly bearing the vertical load of the hardware.
Suspension clamp (steel)
Suspension clamp(steel)
Suspension clamps made of steel or malleable cast iron.
Suspension clamp (aluminum)
Suspension clamp (aluminium)
Suspension clamp made of aluminum alloy material.
Strain clamp clamp strain clamp
Used to fix the end of the wire and withstand the tension of the wire.
Strain clamp (bolt type)
Strain clamp(bolted type)
Secure the strain relief of the wire with bolts.
Strain clamp (compression type)
Strain clamp(compression type)
Secure the wire's strain clamps by compression.
Strain clamp (wedge type)
Strain clamp(wedge type)
Use a wedge to secure the wire's strain clamp.
Connection hardware hanging ring link
Both ends are circular connectors.
Hanging plate clevis & tongue
Both ends are bolted assembled plate-shaped connectors.
Ball-eye ball-eye
A connector made up of a ball and a ring.
Ball hooks ball-hook
A connector formed by a ball and a hook.
Bowl hanging plate socket-clevis eye
A connector made up of a hood and a double piece or a single piece of hanging plate.
Ball-clevis
A connector made up of a ball with a double piece or a single piece of hanging plate.
U-shaped hanging ring shackle
A connector made up of a U-shaped ring and a two-piece hanging plate.
U-bolt U-bolt
A connector made up of a U-shaped ring and a threaded rod.
Yoke plate
A plate-shaped connector for parallel assembly of multiple branches.
Towing plate
A hanging plate with a draw hole.
Hook hook
A connector made up of a ring and a hook.
Hanger hanger
Supports the lightning conductor instead of the crossarm assembly on the pole.
Adjustment plate
Adjustable connection length plate connector.
Basket turn screw
Use the left and right threads to adjust the length of the assembly.
Splicing sleeve
Used to connect the wire, and to meet the mechanical and electrical performance requirements of the metal pipe fittings.
Connection tube (oval)
Splicing sleeve(oval)
A splice tube with an oval cross section.
Connection tube (circular)
Splicing sleeve(circular)
A splice tube with a circular cross section.
Repair tube repairsleeve
Repair metal pipe fittings for damage to the surface of the wire.
Parallel groove clamp parallel groove clamp
Connect the conductors in parallel to transmit the clip of the electrical load.
Jumper clamp jumper clamp
Clips for connecting non-linear tower jumpers.
Protective tool hammer hammer damper
A hammer-shaped assembly for suppressing the wire from being vibrated by breeze.
Grading ring
A ring fixture that improves the voltage distribution of insulator strings.
Shield ring
Rings that do not show corona within the shielded area.
Grading and shielding ring
Both ring pressure and shielding effect of ring gear.
Arc angle arcing horn
A horn that prevents flashover of the arc along the surface of the insulator.
Spacer spacer
A fixture that maintains a fixed interval between the split conductor wires.
Pre-stranded pre-formed armor rod
Spiral lines that increase wire stiffness and vibration resistance.
Aluminum bag with aluminum armor tape
Wrap aluminum strands to make their surfaces free from abrasive aluminum bands.
Weight
Hang on the lower end of the insulator string to increase the vertical load weight.
Pull the gold line clip guy clip
Saddle assembly to secure strand ends.
Heart-shaped ring thimble
A pad used to tie a strand or wire rope.
Contact fittings terminal connector
The metal fittings used to connect the wires to the outlet terminals of electrical equipment.
T-clamp T-connector
T-shaped fittings with wires and branch lines connected.
Copper to aluminum adapter board
The aluminum terminal is connected to the copper terminal to prevent galvanic corrosion from contacting the plate.
Busbar hardware bus-bar support
The general term for fixed and suspended hard bus attachments.
Busbar spacer bus-bar separator
Holds the spacers between the hard busbars at regular intervals.
Busbar expansion joint bus-bar expansion joint
The elastic element used to compensate the busbar due to thermal deformation and vibration deformation.
Tube busbar ending ball tubing bus-bar corona ball
Ball element for prevention of corona generation at the end of the tube busbar. Inspection, test method Visual inspection
The inspection of the external appearance based on the visual observation.
Type test
Tests were carried out on parts designed and manufactured according to certain technical conditions to show that the design meets certain standards.
Sampling test
In a product produced under the same conditions, a certain number of tests were randomly extracted.
Factory test routine tests
Tests are performed on each part during or after manufacture to determine whether it meets a certain standard.
Mechanical failing load tests
The mechanical failure test was conducted under the specified test conditions, and the test specimen reached the maximum load and destroyed the load value.
Grip strength tests
Under the specified test conditions, the gripping force of the clips on the mounting wire was measured.
Vibration test
Tests for vibration conditions under specified conditions to determine the vibration isolator components.
Resistance test
Measurement of the resistance value of conductive elements by direct current temperature test temperature-rise tests
Under the specified conditions, the temperature rise test of the conductive element was measured.
Aging tests
The specified aging factor is applied to the test piece so that the test for the service life can be evaluated in a much shorter time than the actual service life.
Low-voltage high-current tests
The test of a test piece where the voltage is a small percentage of the rated value and the current is rated or greater than the rated value.
Thermal stability tests
To determine the thermal stability of the test specimens under the specified overload conditions and temperature loss.
Radio interference tests
Measure the test of the radio interference level of the test piece under operating voltage.
Partial discharge inception voltage test
The lowest voltage test when measuring the partial discharge of the conductor surface.
Corona test corona tests
A non-uniform field intensity occurs near the conductors in the glow discharge test in a very high electric field.
Zinc layer uniformity test test for uniformity of galvanized coating
With the replacement of metal ions, test the uniformity of the coating.
Impact load test
Under the specified conditions, the component is subjected to a momentary mechanical dynamic load to simulate the bearing capacity of the component under accident conditions.
Corrosion resistance tests
The test of the corrosion resistance of the test element under conditions of exposure to a certain temperature and salinity