33kv Air Break Switch

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Product Name:

33kv Air Break Switch

Model NO.:

IST-12/400

Brand:

Oei Power

Certification:

IEC IEEE

Structure of Operating:

Manual

Common Model:

Ist

Run:

Turn the Horizontal

Series:

Three

Grounding:

Single Ground

Number of Poles:

Three Pole

Movement Mode:

Horizontal Rotary Type

Grounding Mode:

Grounding

Operation:

Manual

Installation:

Outdoor High-voltage

Structure:

Three-column Disconnector

Type:

High-voltage

Trademark:

OEIpower

Transport Package:

Cartons Pallets Wooden Case

Specification:

IEC IEEE

Origin:

China Nanyang

HS Code:

8535309000

Product Details

The following documents were referred to during the preparation of this specification. In case of conflict, the provisions of this specification shall take precedence.
IEC 129:1975: Alternating Current Disconnectors (Isolators) and Earthing Switches
IEC 60694:2002: Common Specifications for High Voltage Switchgear and Controlgear
BS 729: Hot dip galvanized coating on iron and steel articles
IEC62271-102
Isolator (Disconnector) – a mechanical switching device which provides, in the open position, an isolating distance in accordance with Electrical Safety requirements.

SERVICE CONDITIONS
The isolator shall be suitable for continuous operation outdoors in tropical areas at altitudes of up to 2200m above sea level, humidities of up to 90%, average ambient temperature of +30ºC with a minimum of -1ºC and a maximum of +40ºC and heavy saline conditions along the coast.

4.2. DESIGN AND CONSTRUCTION
4.2.1 The Isolator, Solid Link shall be designed and constructed in accordance with IEC 129 and IEC 60694.
4.2.2 The isolating link shall be of the vertical opening, designed for single phase manual operation. It shall be easily removed and replaced by using a portable operating rod.
4.2.3 The isolating link shall incorporate double porcelain insulators to suit voltage requirements and mounted on hot dipped galvanised steel under base suitable for vertical mounting.
4.2.4 The isolating link shall be arranged so that each unit is mounted independently on an angle bracket. It shall be supplied complete with the angle bracket and accessories suitable for mounting on ‘U’ type steel channel. The drawings to be submitted shall indicate all the applicable mounting positions.
4.2.5 The isolator shall be designed such that in fully open position, it shall provide adequate electrical isolation between the contacts on each phase. It shall conform to the requirement as single point isolation for safety.
4.2.6 All steel parts shall be hot dip galvanized to BS 729. The minimum coating of galvanizing required is 80 microns.
4.2.7 The solid link shall be removable from the mounting by use of operating rod.
4.2.8 All current carrying parts of the isolator shall be made of high conductivity material.
4.2.9 The isolator shall be fitted with clamp connectors for Aluminium (ACSR) conductor of Aluminium (ACSR)conductor of up to 18.2mm diameter.

The rating of the complete isolator shall be as follows: –
Rated voltage
36 kV
Rated frequency
50 Hz
Rated lightning impulse withstand voltage
200 kV
Rated power frequency withstand voltage, dry
95 kV
Rated normal current
400 Amps
Rated short time withstand current for 3 sec, min.
18.0 kA
Minimum creepage distance of insulators
900 mm

S.No	DESCRIPTION	UNITS	BIDDER OFFERED VALUE
1.	Rated Voltage	KV	12 KV
2.	Frequency	Hz	50 Hz
3	Rated continuous current	A	630
4	Impulse withstand voltage to ground	KV	95
5	Impulse withstand voltage across gaps	KV	110
6	Dry one-minute power frequency withstand voltage to ground	KV	35
7	Dry one minute power frequency withstand voltage across gap	KV	45
8	Wet one minute power frequency withstand voltage to ground	KV	30
9	Limits of radio interference 10KV and 1000 K.C/Sec		250 uV
10	Temperature rise at rated current (max.)		30oC at 50oC ambient
11	Dimensions and mechanical ,Electrical values Of Polymer Insulator
12	Leaking distance	mm	508 (minimum)
13	Dry arcing distance	mm	210 (minimum)
14	Cantilever strength	kg	400
15	Tensile strength	kg	1000
16	Compressive strength	kg	5400
17	Tensile proof test load	kg	700
18	Dry power frequency flashover	KV	85
19	Wet power frequency flashover	KV	55
20	Dry one-minute power frequency withstand	KV	70
21	Wet one-minute power frequency withstand	KV	45
22	Impulse flash over positive	KV	115
23	Impulse flashover negative	KV	140
24	Power frequency puncture voltage