12kV Electrical Equipment 3-phase Earthing Switches

12kV Electrical Equipment 3-phase  Earthing Switches

1. As a key component of metal enclosed switchgears, GN-12~40.5Q indoor high-voltage isolating switch is suitable for 12kV, 24kV and 40.5kV single-phase AC 50Hz power system.

2 Features of Main Structure

2.1 Every phase conductive body for an isolating switch of GN-12~40.5Q is fixed on a bottom seat by post insulators. Three phases of a GN-12~40.5Q isolating switch are mounted in parallel. The conductive body of every phase is composed of a contacting knife and a stationary contact. At the mid of every contacting knife is connected with a pull rod insulator that is connected with a main shaft mounted on a bottom frame by a connecting rod. The main shaft is connected to CS6-1T or CS6-2 operating mechanism by a crank arm and a connecting rod. The mechanism is connected to the isolating switch by a connecting rod supplied by customers to make the relative movement of the mechanism and the switch.

2.2 The conductive part mainly consists of a contacting knife and a stationary contact. The stationary contact is mounted on a post insulator. The contacting knife of every phase is composed of two pieces of groove copper plate to enlarge the heat-sinking area and enhance the mechanic strength of the contacting knife, so the thermal and dynamic stability has been enhanced. One end of the contacting knife is mounted on the stationary contact by a pin (bolt), the other end of the contacting knife is a separable connection with the stationary contact. The contacting pressure of two contacting knives is maintained by a spring.

3 Technical data

Technical Parameters Table

4 Installation and Adjustment

4.1 The earthing switch can be mounted horizontally, vertically or declinely. The switch and the operating mechanism shan’t be installed until they have been checked up and in normal.

4.2 Fix the earthing switch on the basic seat with four bolts M12.

4.3 Phase by phase, check up and adjust the contacting condition of the contact and contacting finger. More than two thirds of the contacting area has to be guaranteed.

4.4 Check up closing condition of 3-phase contacting seat and contacting finger. The synchronism of the position for 3 phases is not more than 3 mm while just closing.

4.5 Manual closing and opening shall be carried out on the switch for 5 times respectively, making sure everything has to be ok.

Notes: Detailed technical data and outline drawing shall be provided upon request.

   12kV Electrical Equipment 3-phase  Earthing Switches

All our goods are packed in wooden cases, with foam inside for protection. And we have a team who is in charge of packing. The team consists of our skilful carpenters and experienced packing designers. These enable our packing reasonable, safe and reliable.

  12kV Electrical Equipment 3-phase  Earthing Switches

I. Before Sale

a. Contact with clients nearly to know their requirements exactly.

b. Express the requirements from the clients to relevant departments in quickness and exactitude.

II. During Sale

a. Ensure that the products delivered are certified (confirming to the standards of China and IEC).

b. Ensure that marks, handle, package, storage and protection are in accordance with the requirements of ISO 9001/ISO 14001 standards.

c.Transport the products to specified destination as per the contract.

III. After Sale

Our after- sales service is available anytime.

a. Three guarantees will be carried out on the products delivered (18 months quality guarantee). That is refund, replacement and repair.

b. Fittings supply shall be in time.

c. Response for the financial loss brought from the uncertified or services.

d. Product sample is available.

e. Product customization is welcome. We have professional team to meet your requirements.

   12kV Electrical Equipment 3-phase  Earthing Switches

(GDSH)Guangdong Shui Instrument Transformer Works Co., Ltd. has been in the field of designing and manufacturing power transformers, instrument transformers and related components for more than 24 years. GDSH has two factories based in Sihui City near Guangzhou. Sihu Brand products have the full certificates as below:

·Russia GOST certification;

·China Environmental Symbol Products;

·Guangdong Provincial Energy Saving Symbol Products;

·Excellent conduct enterprise certification with AAAA-level standard; and

·Standardized safety production enterprise with second level

And GDSH pass ISO 9001:2000, ISO 9001/ISO 14001/OHSAS 18001 Quality Environmental and Occupational Health and Safety Management Systems certification.

Our production capability is:

Power transformers 20,000 pieces per year

Voltage transformers 80,000 pieces per year

Current transformers 100,000 pieces per year

Insulating articles 400,000 pieces per year

Quality control

We have more than 50 professional quality inspectors. There are at least 2 quality inspectors distributed at each workshop to make sure every parts of our product are qualified. What’s more, our Test workshop is always capable of stopping non-conforming products to be delivered.

There are 30-45 members in our R&D team

We have a policy of continuous improvement to its product lines.

 And our substantial R & D capabilities are focused on quality and functional enhancements.

Our R&D team provides innovative products to the power grid and other electrical industries.

Our main export market is South Asia, North America, Europe and South America and so on.

   12kV Electrical Equipment 3-phase  Earthing Switches

Payment terms: 30% deposit in advance and 70% balance paid before delivery or 100% L/C at sight

Minimum order:

For high voltage products and power transformers: 1 piece;

 For medium voltage products: 3 pieces;

For low voltage products and insulating articles: 10 pieces

Delivery time: 5~30 days after receive of order

Quotation Valid Date: 90 days

Transportation methods: By air or by sea, as requested

  12kV Electrical Equipment 3-phase  Earthing Switches