Suspention clamp are used to hang conductor or ground wire through insulator of link fitting to tower arms or substation structures. The clamp are made of malleable iron or aluminum alloy. The suspension angle of suspension clamps is not less than 25 degree, the redius of curve is not less than 8 times the diameter of the installed leads. The percentage of the grip on different kinds of leads to the calculating capicity of snap meets the international standard.
The suspention clamp is a kind of overhead line conductors. There are also two types of suspension hardware, including tension fittings and limited grip hardware. The suspension clamp hangs or supports the conductors, primarily bearing the vertical load hardware.
The suspension clamp is used on overhead lines or substations. They can hang the conductors or arresters on the insulators or hang the arresters on the tower by the connectors. It also used for fixing and supporting the conductor and non-linear rod on the pole.
There are numorous kinds of suspension clamps. They can be classified in different method. Here are three method to classify them. Here we will introduce three ways to classify them.
Firstly, some of the abbreviations as follow: C(X)—suspension clamp, G– fixed, S—double clamp, U—U shaped screw, J—strenghthened, H—Aluminum Alloey, F—anti-corona, K—carried up type, T—carry bag type, A—with socket clevis eye, B—with U-shaped clevis, X—hang-down type.
CGU suspension clamp is als called general type suspension clamp. The fixed u-shaped screw suspension clamp(CGU) can be costomized. All specifications are avaliable with the drawings porvided. All the products meets the international standards.
The materials: Clamp and plate–forging iron; Closed pin–stainless steel; spare parts–steel
Main usage and feature
The diameter of the wire clip slot is large, when it is used for large section steel-cored alumimum conductors or conductors wrapped with pre-twisted wire sheathed grommets. If you use the common hanging plate, it is easy to cause deformation. These are the two reasons the U-shaped hanging plate is added to the upper end of the wire hanging plate. Due to such a combinaton, the bending movement of the hanging plate is reduced, and also change the direction.
Componants and materials
The socket and the socket are made of forging iron
The endfittings are stainless steel
Other mateirals is steel
All the componants are hot-dip galvanized zinc and are corrusion resistent.
Here are some main features:
Clamps have high vertical devastating load;
The cable will not get out of the clamp even in the condition of unblanced icing on adjacent gears. This means the clmaps may have enough tensile strenghth;
For the clip of the lightning conductor, the grip strength should be no less than 25% of the rated tensile strength of the steel strand, and the grip of the clip for the steel core aluminum stranded wire should be no less than 30% of the rated tensile strength of the wire.
It is used for 330kv—500kv transmission line or high altitude transmission line. This kind of clamp require high anti-corona ability. Typically, the componetns of the anti-corona type includes a flared hull, two (or four) bolts (to fasten the boat hull) and the steel hoop of the suspension part in the middle of the hull, which also known as the suspension bar type.
Materials: clamp and plate—aluminum alloy; deadend link—stainless steel; spare parts–steel
This type of anti-corona suspension clip is divided into two types: line and jumper. The jumper one also can use on substation and has weak grip.
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Main features:
The axis of the hull is above the centerline of the wire, and its rotation coincides with the deflection of the wire.
Characteristics: The hull axis lies below the centerline of the wire and has a tendency to be unstable, and its rotation often exceeds the deflection of the wire.
Function: It is mainly used when the overhead ground wire is placed on the top of the tower, and when the split wire is to be arranged on the bar.
Material: clamp and plate—ZL102 aluminum alloy; deadend link— stainless steel; spare parts—steel
Material: clamp and plate—ZL102 aluminum alloy; deadend link— stainless steel; spare parts—steel
Features: high strength, strong corrosion resistance, low hysteresis loss, low energy consumption and energy saving. It is also benefit to control the generation of corona. It is widely used on 330kv to 500kv transmission line or meet the requirement of the corona production in the high altitude area.
It is used on 220kV lines to replace the commonly used malleable cast iron lines, which has good economic benefits.
The hull of the wire clip is stamped from steel plate, without hanging plate. The hanging point is above the axis of the wire, and the u-bolt is upware installed for convenient construction. The production process is simple with short cycle, high yield, light weight and few accessories, etc. it is suitlable for installing steel-cored aluminum stranded wires and aluminum stranded wires of medium and small sections.
The hull, plate and clevis is cast iron, the closd pin, and other spare parts are made by steel. We use hot-dip galvanized technic for cast iron and steel.
Hysteresis loss: Due to the magnetic material in the AC iron core coil, in addition to the power loss of the coil resistance, hysteresis and eddy current can also be generated in the alternating magnetic field, resulting in power loss and heat generation.
If you are interested, our next passage is still about suspension clamp. We will introduce 7 other types of suspension clamp and how to choose a suitable suspension clamp.
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