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Nanyang Hengte Electric Co., Ltd.

Disconnector, Disconnect Switch, Isolator Switch manufacturer / supplier in China, offering Disconnector Switch 2000A 33kv, Disconnector Switch Single-Pole 600A, "K" and "T" Type Fuse Link and so on.

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Disconnector Switch 2000A 33kv

FOB Price: US $11 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $11/ Piece
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Production Capacity: 7000
Transport Package: Wooden Case
Payment Terms: L/C, T/T, D/P

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Basic Info
  • Model NO.: GW4-33 2000
  • Specification: IEC IEEE
  • HS Code: 8535309000
  • Trademark: OEI Power
  • Origin: China Nanyang
Product Description
Center Break Isolator and double Break Isolator
Disconnector Switch 2000A 33kv

These disconnectors are , no load switching devices
which physically isolate the lines. They are designed for
horizontal outdoor application and can also be designed
for vertical installation. For earthing and closing of
switchyard portions of the installation, the earthing
switches are provided on disconnector. If required.
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
 
 

System Voltages132kV
1System:50 Hz, 3phase
2Neutral Point EarthingSolidly EarthedEarthing Resistor
3Nominal voltage of networks132kV
4Highest system voltage as defined by IEC - 38145kV
5Short circuit not less than [MVA] N/A
6Short circuit and earth fault current, symmetrical r.m.s. value not less thanN/A
7Thermal short circuit current, 1 second not less than31.5 kA
8Dynamic Peak current not less than80 kA
9Continuously rated currents of Isolating Switches:1 600 A
10Isolation Voltage according to IEC - 71
10 a- Switching Surge withstand voltage

Phase to earth 275 kV

- Longitudinal impulse component of combined test325 kV
10 b- Lightning Impulse withstand voltage 1.2/50 micro-s

To earth and between phases650kVp

Across the isolating distance of isolating switches750 kVp
10 c- Test voltage at power frequency 1 minute, dry and wet  
   (at sea level)


To earth and between phases (r.m.s.)N/A

Across the isolating distance of isolating switchesN/A
 11For the design and erection of the conductors in the switchyard the following minimum distance shall be observed:
11aPhasetoground [mm]1 500
11b- Phasetophase2 330
11cBusbars phasetophase3 500
11dHeight to live parts above ground5 500
11eHeight to live parts above ground at    
   service/transportation strips                            [mm]
5 500
11f- Lowest part of insulators above ground          [mm]3 500
12Maximum temperature rise of conductors
above ambient temperature (45oC)
40oC
13Maximum wind pressure on conductors and cylindrical objects430N/m2
14Maximum wind pressure on flat surfaces820N/m2
15Minimum nominal creepage distance as defined in IEC 815, Table II25 mm/kV

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