Bus supports 220 kW

Busbar supports of the ШО (ШОП) type for a voltage of 220 kV are intended for insulation and fastening of wires, rigid busbars and devices in switchgears of power stations and substations of alternating current with a frequency of 50 (60) Hz.

Busbar supports for voltage 220 kV structurally consist of 2 main elements: an insulator column that performs an insulating and lightning protection function and a busbar holder installed on top of the insulator and intended for fastening flexible and rigid busbars. Also, at the customer’s request, busbar supports can be equipped with a frame and a metal support post (prefabricated or pipe), on which an insulator with a busbar holder is fixed.

It is possible to manufacture 220 kV bus supports in 4 main designs:

ШО-220 (II*)-1 УХЛ1: busbar support for voltage 220 kV with a porcelain insulator with category II* (creepage distance 105 cm), design “1” (for fastening one wire), in climatic version УХЛ1;

ШОП-220 (II*)-1 УХЛ1: the same as in ШO-220 (II*)-1 УХЛ1, but with a polymer insulator;

ШО-220 (II*)-2 УХЛ1: the same as in ШО-220 (II*)-1 УХЛ1, but in design “2” (for fastening two wires);

ШОП-220 (II*)-2 УХЛ1: the same as ШО-220 (II*)-2 УХЛ1, but with a polymer insulator.

In all versions, creepage distance categories and wire (pipe) diameter must be specified when ordering.

Main technical characteristics

№	Parameter name	Meaning
1	Rated voltage, kV	220
2	Highest operating voltage, kV	252
3	Rated voltage frequency, Hz	50 (60)
4	Test alternating short-term voltage, kV:
	— dry	395
	— rain	395
5	Test voltage of full lightning impulse, kV	950
6	Power frequency test voltage under dirty and humid conditions	220
7	Mechanical bending strength, kN, not less	4
8	Wind and ice-wind loads:
	— permissible wind speed without ice, m/s;	40
	— permissible wind speed during icy conditions with an ice wall thickness of 20 mm, m/s	15
9	Factor of mechanical strength in relation to the load from the tension of wires, taking into account wind and ice, not less	2,5
10	Seismic resistance, points on the MSK-64 scale, not less	8
11	Radio interference level, dB, no more	54
12	Leakage distance of external insulation, cm, not less, for degree of contamination:
	— I;	405
	— II;	505
	— II*;	570
	— III;	630
	— IV	790