AIZ-220-Z

The bus- bar supports of outdoor application AIZ-220-Z are used for tubular bus-bar supporting of rigid bus-bar 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 (Z- rigid fitting of aluminium tubular bus-bar)

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.

Type of bus-bar support of rigid bus-bar	Diameter of tube of rigid bus-bar, mm	Conventional diameter of bus	Spacing, H, mm	Weight, kg
AIZ-220-Z30-4 UHL1	30/25	30	2179	76,1
AIZ-220-Z40-4 UHL1	40/35	40	2179	76,2
AIZ-220-Z50-4 UHL1	50/45	50	2180	76,5
AIZ-220-Z70-4 UHL1	70/64	70	2190	76,8
AIZ-220-Z80-4 UHL1	80/72	80	2196	78,0
AIZ-220-Z90-4 UHL1	90/80	90	2202	78,3
AIZ-220-Z100-4 UHL1	100/90	100	2214	78,5
AIZ-220-Z110-4 UHL1	110/100	110	2220	78,7
AIZ-220-Z120-4 UHL1	120/110	120	2222	79,3
AIZ-220-Z130-4 UHL1	130/116	130	2235	81,3
AIZ-220-Z140-4 UHL1	140/120	140	2240	81,3
AIZ-220-Z150-4 UHL1	150/136	150	2250	82,4
AIZ-220-Z170-4 UHL1	170/156	170	2270	83,5
AIZ-220-Z200-4 UHL1	200/180	200	2290	87,5
AIZ-220-Z250-4 UHL1	250/230	250	2315	83,5

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 for isolation and fastening the 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-Z....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.