Cable joints - terminal and connecting

Couplings are devices that are used to connect cables. The result is a line that is fed to various electrical installations. The couplings are quite different in parameters. The nominal voltage indicator is 5 kV on average. End modifications are the closing link in the chain.

A conventional coupling consists of a cuff, a contact rod, and also insulators. Some modifications have a rewind. In order to learn more about these devices, you should consider the types of couplings, as well as specific configurations.

Difference of connecting couplings

Couplings (cable, heat shrinkable) are the connecting link, and the circuit on them is not closed. On the device they are different. Models are used for telephone lines. Also there are modifications for multi-core trunk cables. Cuffs in many models are installed with a lid. Contact rods are installed in various diameters. On average, the nominal voltage of the device is 5 kV. It is also important to note that there are modifications that have a cable lug.

Installation of cable couplings can be carried out in different ways. Most often this happens by soldering. However, modifications with special clamping mechanisms are on the market. In this case, much depends on the size of the coupling. If we talk about parameters, then the coefficient of heating of the veins in the models fluctuates around 70%. The operating voltage at a constant frequency, as a rule, does not exceed 18 kV. The maximum temperature for short circuits is on average about 140 degrees. Many couplings have a fire hood.

End models

As mentioned before, the end cable clutches are the closing link in the chain. The difference is in the presence of a compound. It represents a lead conductor. In some cases, the models use a cable lug. Insulators are most often used in a through type. Also, the models use different grounding drives. In this case, the belt insulation is located near the bandage. Many couplings have a tube. Oil pressure in the middle of the device can be maintained at 220 KPa. The maximum temperature in case of a short circuit does not exceed 130 degrees. The nominal voltage of the devices is about 5 kV. To install the device, tightening bolts or clamps are used. Also there are modifications, the installation of which is carried out by soldering.

Models for 1 kV

Couplings of 1 kV are often used to connect telephone cables. In this case, steel cuffs are used. Immediately the hulls are made of cast iron. If we talk about the parameters, the oil pressure of the device is maintained at about 120 MPa. Tightening bolts are used for connecting the veins.

For trunk lines, a 1 kV cable (connecting) coupler is not suitable. The maximum temperature parameter for short circuits in devices does not exceed 130 degrees. The tips of the models are installed behind the winding. Insulators are often applied through-type. Some devices have a handset. End modifications are characterized by the presence of a compound.

Models of 5 kV

Couplings of 5 kV are used for multicore cables. The tips in the devices can be located behind the tube. In this case, the oil pressure of the model can withstand about 150 KPa. Some devices have a bandage. It is also important to note that insulators are often used in a through type. The coefficient of heating of the veins averages 75%. By type of installation, the models differ.

Features of couplings for 10 kV

Cable joints of 10 kV are designed for high-voltage lines. The hulls of the models are often of cast iron type. Insulators in this case are used different. The oil pressure of the device is maintained at an average of 330 KPa. The maximum temperature at short circuit is about 180 degrees. The contact rods of the models are located under the insulators. At the end modifications there is a compound. Winding in the devices used steel. The operating voltage of the models with variable frequency does not exceed 30 kV.

Coupling "Stp"

A cable joint (connecting) of this type is suitable for stranded wires. The cuff of the model uses lead. It is installed near the lower insulators. The winding in this case is of different lengths. According to the type of compound, the models differ. On average, the pressure limit of the device is kept at 130 KPa. The rated voltage of this coupler is 7 kV. In turn, the heating coefficient does not exceed 75%.

The operating voltage of the clutch at a variable frequency is 16 kV. There are connecting bolts for the installation of the device. The casing of the coupler is provided with a fireproof type. It is also important to note that the model has a ground drive. The bandage in this case is located above the winding. The cover of the model is made of cast iron.

Modifications of "Strep"

Cable clutches of this type are used for ground connection of high-voltage lines. The winding of the model is made of cotton strips. In this case, a steel cuff is installed. Insulators in the model are used only through type. Special fasteners are used to secure the device. It is also important to note that the coupler has a tip that is located under the bandage. The compound itself is an epoxy type.

The nominal voltage of the device is 1 kV. According to the documentation for the clutch, the oil pressure can withstand a maximum of 210 KPa. The operating voltage at a constant frequency does not exceed 30 kV. For the distribution cable line, the model is not suitable. In addition, it should be noted that the device uses a fire hood.

Features of the StpB model

This coupling has a large contact rod. The bandage in this case is located near the insulators. The cuff of this device is steel. In turn, the body is made of cast iron. The isolators of the model are only of the belt type. For attaching the device there is a special bracket. The cable lug in the device is installed together with the grounding drive. The rated voltage of the clutch is 5 kV. The initial heating temperature of the core does not exceed 80 degrees.

The oil pressure can withstand about 130 KPa. The coefficient of heating of the veins of the model is insignificant. It is also important to note that the device is often used to connect multi-core cables. In this case, there is no compound. The operating voltage at a variable frequency is about 12 kV. The hood is missing in this case.

Application of the device "StPO"

These cable couplings are often used in repair work on trunk lines. The casing is in this case used in the fireproof type. To install the device there are special fixatives. The cuff of the model is provided with a lead type. The directly contact rod is located under the tip. The wire insulator in the model is located with the winding. It is made of cotton strips. In turn, the insulators are made of polyethylene. The bandage is absent in this case.

The rated voltage of the coupling does not exceed 7 kV. The coefficient of heating of the veins is at the level of 80%. The operating voltage of the device at a constant frequency is 14 kV. The initial temperature of the conductors of the cable is on average 130 degrees. It is also important to mention that the oil pressure system can withstand about 200 KPa.

Differences of the model "PSTP"

These cable connectors are designed for distribution lines. The lid is used in this case mast type. Directly plastic insulators are under the ground conductor. The cuff at the coupling is of the lead type. The contact rod is of small diameter. The cable lug is fixed in the clutch housing under the lid.

The winding in the device is made of cotton strips. Directly the lead tube is located above the waist isolators. The oil pressure system can withstand a maximum of about 120 KPa. In its turn, the short-circuit temperature is 180 degrees. The operating voltage at a constant frequency of the model is 15 kV. Tightening bolts are provided for the installation of the device.

Couplings "PSTPR"

The specified cable end clutch (heat shrinkable) is intended for telephone lines. The insulators in this model are made of polyvinyl chloride. In this case, the cuff is mounted above the contact rod. Directly the cable lug is used in large diameter. It is also important to note that the coupler has bushing insulators. The rated voltage of the system is at 5 kV. The initial temperature of heating the veins does not exceed 70 degrees.

The operating voltage at a constant frequency averages 15 kV. Tightening bolts for connecting cables in the device are absent. Direct mounting of cable joints is carried out by soldering. Compound in this case is not provided. It is also important to note that the coupling has a bandage with a protective fire cover.