Overview:

11kv disconnecting switch (hereafter we it as: outdoor isolator switch) are designed to allow two types of currents that is, 

direct current (DC) and alternating current (AC). Depending on the customer's country, you can identify the suitable 11kv disconnecting switch.

Basic parameter:

Structure: Three-column Disconnector

Operation: Manual

Movement Mode: Horizontal Rotary Type

Grounding: Single Ground

Run: Turn the Horizontal

Structure of Operating: Manual

Brand: XIKAI

Specification: IEC IEEE

Type: High-voltage

Installation: Outdoor High-voltage

Grounding Mode: Grounding

Number of Poles: Three Pole

Series: Three

Common Model: Ist

Certification: IEC IEEE

Short description:

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 

+30 with a minimum of -1 and a maximum of +40 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