AIZ-220-S

The bus- bar supports of outdoor application AIZ-220-S are used for fixation of two aluminium tubular buses of rigid bus- bars at 220 kV voltage and current frequency to 60 Hz in open distribution devices of electric power stations and substations.

Bus-bar supports are made in climatic design UHL, category 1 according to GOST 15543.1-89 and GOST 15150-69, in which:

altitude above sea level not more 1000 m;
thickness of the crust of ice less than 20 mm;
wind speed in glaze condition to 15 m/s;
wind speed in the absence of glaze to 40 m/s;
environment value of temperature of air + 40 °C;
environment value of temperature of air - 60°C.

Environment not explosive, the content of corrosion-active agents must comply with the atmosphere requirements I and II according to GOST 15150-69.

Decoding of bus-bar symbols:

AIZ-X1-X2X3-X4-UHL1,

AIZ- trade mark of bus-bar supports,

X1- nominal voltage in kV,

X2- index, which shows standard performance of bus-bar support (S- for fixation of two aluminium tubular buses),

X3- conditional diameter of aluminium bus,

X4- pollution degree by GOST9920,

UHL- pollution performance by GOST 15150, installation category by GOST15150.

Variants of performance are introduced in table 1.

Table 1

Type of bus-bar support of rigid bus-bar	Dimension L, mm	Diameter of tube of rigid bus-bar, mm	Conventional diameter of tubular bus	Spacing, H, mm	Weight, kg
AIZ-220-S50-4 UHL1	50/45	870	50	2190	93,5
AIZ-220-S60-4 UHL1	60/54	870	60	2200	94,6
AIZ-220-S70-4 UHL1	70/64	870	70	2225	95,0
AIZ-220-S80-4 UHL1	80/72	870	80	2230	96,0
AIZ-220-S90-4 UHL1	90/80	870	90	2230	97,2
AIZ-220-S100-4 UHL1	100/90	870	100	2235	98,0
AIZ-220-S110-4 UHL1	110/100	870	110	2245	98,5
AIZ-220-S120-4 UHL1	120/110	870	120	2245	100,0
AIZ-220-S130-4 UHL1	130/116	870	130	2255	103,0
AIZ-220-s140-4 UHL1	140/120	870	140	2260	104,0
AIZ-220-S150-4 UHL1	150/136	870	150	2260	105,0
AIZ-220-S170-4 UHL1	170/156	870	170	2280	108,0
AIZ-220-S200-4 UHL1	200/180	870	200	2310	174,0
AIZ-220-S250-4 UHL1	250/230	870	250	2315	182,0

Main technical characteristics

Technical specifications	Value
Rated voltage, kV	220
Maximal working voltage, kV	252
Test voltage of full lightning impulse, kV	950
50%-ing discharge voltage of industrial frequency in polluted and humid condition, kV - when the specific surface conductivity of the layer of pollution, mkSm	220 10
Minimal breaking load on bend, kN, not less	8
*The minimal breaking torque, not less, kNm**	2
Creepage distance, cm	570
The highest peak of the rated short time withstand current (current of electrodynamic resistance), kA	100
Acceptable traction of buses in the horizontal plane of bus-bar supports in the place of bus fixation, N	1480
Dimensions of bottom flange, mm	Diam. 225* 4hols.diam.18

Bus- bar supports are made on the basis of polymer rod insulators which are intended in applying in bus-bar supports. There was used special design and construction for the bus-bar support. Factory does not recommend applying the standard insulators as insulated supports of distribution devices. Bus-bar supports AIZ are applied for opened distribution devices of electric power stations and substations of alternative currents with 6-220 and kV voltage 50 Hz frequency. Insulators are made in accordance to IEC 62231standard and Technical specifications TS3494-005-59116459-0 ,,Bus-bar supports for the 10-220 kV voltage”.

The monolithic core of insulator of bus-bar support eliminates possibility of internal discharge and breakdown, unlike tubes filled with foam, as well as leakage of current in internal cavity and on the wall of tube as consequence of condensation in contrast to hollow tubes. Flanges of bus-bar supports are made from cast high-strength aluminium alloys. Absence of welds in flanges allows applying insulators in the conditions of low temperature in Siberia.

Advantages of bus-bar supports AIZ-220-S....UHL1

Thanks to the silicone adhesive coating on the insulating body of the bus-bar support useful service life- 30 years; high firmness to influence of acids and alkalis, to an ultra-violet exposure; resistance to erosion and tracking; high hydrophobic properties; light weight; more resistible for acts of vandalism; ensures safety conditions even during installation and exploitation works.

The bus-bar support DOES NOT FALL TO THE GROUND in condition of overloads on bend, it just curves. That’s why it eliminates possibility of personal injury.