Suspension clamps

The suspension clamps consist of the tray, a clamp body and a clevis through which the clamp connects to the insulator string (except for type ПГ-1-11, ПГ-2-10, ПГ-3-10). The tray of the suspension clamp is connected to the suspension string through a clevis hinge. In order to avoid wire slipping at uneven loads in the adjacent spans, wires are fixed in the tray with a retainer. Clamps are available in ПГ, ПГН, ПГУ, П4Р and П6Р types. The design of suspension clamp elements varies depending on its intended use.

By functionality suspension clamps can be classified as follows:

• ПГ and ПГН – for a single phase conductor;
• 2ПГН, 3ПГН, 4ПГН, 4ПГН2, 5ПГН, 5ПГН2, 8ПГН2 and 8ПГН4 – for two, three, four, five and eight wires in a bundle phase conductor;
• 2ПГН-5-1, 3ПГН-5-1 – for outdoor switchgear;
• ПГН-5-4, 3ПГН2-5-1 and 3ПГН2-5-4 – for areas subject to regular icing conditions;
• 3ПГН-6-1, 3ПГН2-6-1 – for three conductors of AC500/336 grade;
• ПГН-6-9, ПГН-8-6, 3ПГН-8-1, 4ПГН2-8-2 – for hollow aluminum conductors;
• ПГУ, 2ПГУ, 3ПГУ and 5ПГУ2 – for the angle suspension towers;
• multi-roller suspension

In addition to the major types of the suspension clamps as listed above, other suspension clamps and a number of special devices are used for OTL and substations.

For OTL 35, 110, 220 kV with a single phase conductor the blind suspension clamps of six the requirements of sizes are used:

• ПГ-1, ПГ-2, ПГ-3, ПГН-5, ПГН-6, ПГН-8.

The ball joint socket of the clamps, type ПГ and ПГН has the conventional size of 16 mm.