The structure of SV on-load tap-changer
Compared with other products, we made some improvements as follows:
1. Change the selector
At present, the domestic products still use the old foreign structure, i. E., the movable contact makes connection
with the fixed contact. This structure has a large torque. Our company switched over to the traditional docking
structure with good contacts and small torque. The insulation bracket is made from three isolated wall with a
high-to-ground withstand voltage.
2. Under flange improvement
The under-flange s made of engineering plastics and lifted by four screws. While in the accidents, the increased
pressure often damage the under-flange (it occurs at home and abroad ). Therefore, our company strengthens
the prone-to-crack place to ensue good strength.
3. Correct arc principle
Some domestic manufacturers apply with slide between are contact and rotating pole. When the arc contact
leaves from the fixed contact, the current will breaks, and the current passes through arc contact to the rotating
rod. As the gap between the two can only connect by the arc, the rotating rod will burn off and the gap will get
larger, resulting in the broken of the rotating poles, thus accidents arise. We considered of this and take
appropriate measures
4. Correct resistance installation
Products of the same kind at home and abroad have no outer resistance baffle. Resistance will be scattered in
accidents. Under the effect f elasticity, it collapses which cause the tapping short circuit and threaten the safety
of the transformer. We add one baffle at the outer layer of resistances as a preventive measure, enhancing the
reliability.
Type designation
Voltage-regulating method: W- Positive- Negative voltage- Regulating G- - Thickness regulating
No. Of the middle position: In the middle part there are 0, 1 and 3.
No. Of working position: It could reach 19 or 27 positions.
No. Of contact: The thin contacts are 10 or 14.
Voltage grade (kV): Rated insulation level: 35 kV or 66 kV.
Connection method: Y- Neutral connection, D- Other connection
Technical parameters:
Max. Rated current (A): 200A, 350A
No. Of phase: III - Three-phase I- Single-phase
E. G. SV III 350 Y - 66 - 10 193 W
SV series switch, three-phase, maximum rated current 350 A, neutral connect, voltage at 66 kV, 10 contacts for
thin-regulating, 19 working positions, 3 middle-position, which conversion selector, positive-negative regulating.
| Type |
SV350 |
SV200 |
| Max.rated current (A) |
350 |
200 |
No. Of phases
|
1 |
3 |
3 |
1 |
3 |
3 |
Connect Method
|
_ |
Y |
D |
_ |
Y |
D |
| Short-current test current (kA) |
Heat stabilization (3 seconds. )
Act-stabilization (peak value ) |
5
12.5 |
4
10 |
| Voltage between grades (V) |
Spot 10
Spot 12
Spot 14 |
1500
1400
1000 |
1500
1400
1000 |
REFERENCE TRANSFORMER:
Company Profile:
Our Best Service For You
| 1. |
Pre sale service |
| a. |
make technical solution |
| b. |
send quotation, technical data sheet and drawing |
| c. |
prepare power transmission plan, testing plan and shipment plan |
| 2. |
In sale service |
| a. |
supervise the manufacturing schedule totally in accordance with the plan |
| b. |
send photos to customer during every manufacturing process(hold point) |
| c. |
inform the customer one week before testing. |
| 3. |
After sale service |
| a. |
installation and commissioning, training the workers |
| b. |
quick response within 12 hours any time |
| c. |
provide 12 months guarantee period normally. |
FAQ For You
| 1. Q: |
What is your delivery time ? |
| A: |
Depend on the type of transformer. |
| 2. Q: |
What is your payment term? |
| A: |
30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it. |
| 3. Q: |
What kind of standard you follow? |
| A: |
IEC, ANSI, CSA, GB, etc |
| 4. Q: |
What kind of supporting documentation you can provide normally |
| A: |
Quotation, outline drawing, manufacturing plan, quality control plan
testing plan, financial report, type test report(KEMA, CESI),reference list, etc |
| 5. Q: |
What is your normal warranty period? |
| A: |
12 months after transformer operation. |
| 6. Q: |
Can u do installation and commission in user's site? |
| A: |
Yes, we can send our installation team to user's country for service. |
| 7. Q: |
Do you have any experience in this kind of transformer? |
| A: |
Yes, we can provide reference list for check. |
Our advantages:
Quality Assurance
--From the very beginning, VILLE ensures quality in every step to achieve the best quality.
Experience Sharing
--With more than 30 years' experience in power industry, VILLE brings you an optimized solution.
Global Service
--Wherever you are, VILLE global network will support and provide you with value.
Quick Response
--In response to your needs without delay, VILLE knows the value of your time.
Thanks for choosing VILLE as your reliable partner and
please trust both of us will create a brilliant future!
Audited Supplier 
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