AIZ-330-K

The bus- bar supports of outdoor application AIZ-330-K are used for aluminium tubes supporting of rigid bus- bars at 330 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 (K- end fixation of aluminium tube),

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

Type of bus-bar support of rigid bus-bar	Diameter of tube of bus-bar, mm	Distance between buses, L, mm	Conditional diameter of bus	Spacing, H, mm	Weight, Kg
AIZ-330-К50-4 UHL1	50/45	870	50	3027	157,0
AIZ-330-К60-4 UHL1	60/54	870	60	3030	157,0
AIZ-330-К70-4 UHL1	70/64	870	70	3057	157,1
AIZ-330-К80-4 UHL1	80/72	870	80	3062	157,2
AIZ-330-К90-4 UHL1	90/80	870	90	3062	157,4
AIZ-330-К100-4 UHL1	100/90	870	100	3077	157,7
AIZ-330-К110-4 UHL1	110/100	870	110	3077	157,5
AIZ-330-К120-4 UHL1	120/110	870	120	3082	159,8
AIZ-330-К130-4 UHL1	130/116	870	130	3092	159,9
AIZ-330-К140-4 UHL1	140/120	870	140	3102	160,0
AIZ-330-К150-4 UHL1	150/136	870	150	3132	160,3
AIZ-330-К170-4 UHL1	170/156	870	170	3152	160,5
AIZ-330-К200-4 UHL1	200/180	870	200	3182	160,7
AIZ-330-К250-4 UHL1	250/230	870	250	3187	160,9

Main technical characteristics

Technical specifications	Value
Rated voltage, kV	330
Maximal working voltage, kV	363
Test voltage of full lightning impulse, kV	1175
50%-ing discharge voltage of industrial frequency in polluted and humid condition, kV - when the specific surface conductivity of the layer of pollution, mkSm	315 30
Minimal breaking load on bend, kN, not less	8
*The minimal breaking torque, not less, kNm**	950
Creepage distance, cm	920

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. Insulators are made in accordance to IEC 62231 standard.

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-330-K....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.