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ABB Excellent Supplier
Our company is one of the excellent suppliers for high voltage products business unit of China.
Certificate of Measurement system
Our company has satisfied the requirements of Measurement Assurance System standards.
GOST Certificate
Our products had gained the GOST certificate and can enter the Russia market.
CE Certificates for current transformers
Product Description
12kV Porcelain Bushing Type 3 Phases Isolator Switch for 33kV Switchgear
1 Features of Main Structure:
1.1 Type GN30-12Q (CT)/630, 1000 or 1250 isolating switch is a new and porcaluin bushing type rotary isolating switch. The main body of the isolating switch is fixed at two sides of a bottom frame by two groups of insulators, the two sides are fully separated from each other by an isolated plate connected at the frame. The opening and closing of the isolating switch are fulfilled by rotating the contacting knives. On the basis of the original switch, an earthing knife is added to form a GN30-12QD (CT) isolating switch to satisfy different requirements of switchgear boards. Because of the contacts seats are respectively assembled at the two sides of the isolated plate of the switch, it makes the two parts (with and without voltage) are fully separated from each other in a switchgear board, so the absolute safety for maintenance workers is guaranteed.
1.2 The conductive component consists of a moving contacting knife and a contacting seat. The contacting knife is made of two copper plate fixed in rotary porcelain bushing, and a magnetic locking plate is added to increase rigidity of the contacting knife to guarantee the dynamic and thermal stability of the switch while a short circuit trouble occurs.
1.3 Line contacting is applied for the contacting of the contacting plate and contacting seat, for decreasing the technological difficulty of assembly and warrant a good contacting.
1.4 CS6-2 operating mechanism can be used for the isolatingswitch, and the other operating mechanism self-designed is also used possibly.
2 Technical Parameters for GN30-12QD(CT) Insolating Switches
Table 1 Table 2
No. |
Model |
Rated Coltage (kV) |
Operating Voltage (kV) |
Rated Current (A) |
Dynamic Current (Peak) (kA) |
Thermal Current in 4s (r.m.s.) (kA) |
|
Model |
Normal Pressure for Spring (N) |
1 |
GN30-12Q(D)(CT)/630 |
12 |
10 |
630 |
50 |
20 |
GN30-12QD(CT)/630 |
450±45 |
|
2 |
GN30-12Q(D)(CT)/1000 |
1000 |
80 |
31.5 |
GN30-12QD(CT)/1000 |
400±400 |
|||
3 |
GN30-12Q(D)(CT)/1250 |
1250 |
GN30-12QD(CT)/1250 |
400±40 |
Notes: Detailed technical data and outline drawings shall be provided upon request.
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.
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.
(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.
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
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