Oufdoorimmersed bushing
Bushing, one end of which is intended to be in ambient air and exposed to outdoor atmospheric conditions and the other end to be immersed in an insulating medium other than ambient air (e.g. oil or gas).
Creepage distance
Shortest distance along the surface of an insulafor between fwo conducfive parts
Minimum nominal creepage distance
Unless otherwise agreed between purchaser and supplier, or demonstrafed by a fest, the creepage distance in accordance with lEC 815 isdetermined by Ur/KVl x dcs /mm/kV)x kD where;
Arcing distance
Shortest distance in citr extemal to the insulator between metalic parts which normally have the operating voltage between them.
Altitude
Although the insulafion level refers to sea level, bushings coresponding fo this standard are declared suitable for operafion at any altitude not exceeding 1000 m. in order to ensure hat the external withstand voltages of the bushing are suficient at alitudes exceeding 1000 m, the arcing distance normally required shall be increased by a suitable amount. It is not necessarv to adjust the radial thickness of insulation or the clearance of the immersed end. The puncture strength and the flashover voltage in the immersion medium of a bushing are not affected by altitude.
To the limitations of puncture strength and flashover voltage in the immersion medium it may not always be possible to check the adequacy of the increased arcing distance by actual test at any altitude lower than that of operation. In such a case the supplier shall demonstrate by the amount of increase of the arcing distance, that the bushing is adequate.
For general guidance an increase of 1,0% of the arcing distance necessary at sea level for each 100 m in excess of 1000 m up to a maximum of 3000 m above sea level should be applied.
EXAMPLE Altitude of installation 2800 m;
Increase in arcing distance.
Material: porcelain in accordance group C100 or equivalent maferial.
Colour: brown (other materials are allow by previous agreement)
Surface: glazed excepting for the worked surfaces.
Transformer bushing insulators DIN 42530 1kV - 250 / 3150A
| CODE |
A50012000 |
A50020000 |
A50030000 |
A50042000 |
A50048000 |
| CLASS |
1/250 |
1/630 |
1/1000 |
1/2000 |
1/3150 |
| Draw. refer |
A |
B |
A |
B |
A |
B |
A |
B |
A |
B |
| H |
70 |
30 |
80 |
30 |
85 |
35 |
85 |
35 |
85 |
35 |
| D |
50 |
60 |
70 |
85 |
90 |
110 |
104 |
125 |
125 |
150 |
| d1 |
32 |
30 |
47 |
46 |
65 |
57 |
80 |
70 |
100 |
90 |
| d2 |
50 |
50 |
70 |
70 |
90 |
90 |
104 |
104 |
125 |
125 |
| d3 |
27 |
26 |
43 |
41 |
53 |
46 |
66 |
64 |
86 |
80 |
| d4 |
14 |
|
22 |
|
32 |
|
44 |
|
50 |
|
| h |
25 |
20 |
25 |
20 |
30 |
25 |
30 |
25 |
30 |
25 |
| F |
|
50 |
|
70 |
|
90 |
|
104 |
|
125 |
| F1 |
|
20 |
|
28 |
|
37 |
|
51 |
|
61 |
| Creepage distance mm |
50 |
|
75 |
|
75 |
|
75 |
|
75 |
|
| Arcing distance mm |
50 |
|
60 |
|
60 |
|
60 |
|
60 |
|
| Rated voltage kV |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| g/Weight(gr.) |
160 |
100 |
380 |
190 |
640 |
400 |
820 |
470 |
1350 |
700 |
ATTENTION:
1. The payment term: We accept TT,30% deposit and 70% balance against copy of BL.
2. The delivery time: Usually it will take about 15-20 days.
3. The standard of package: Usually use strong plywood case for protection.
4. The material of transformer: We have two types, one is with copper and another one is with aluminum. It depends on your requirement. In fact, those two have difference if normal work well. Only except the long life. Copper is better and also higher price.
5. The logo: If you have good quantity, it absolute no problem to do OEM.
6. Our market: our products are popular in Indonesia, Philippines, Russia, USA, Middle East and so on. Some of them are our regular customers and some of them are developing. We hope you can join us and make mutual benefit from our cooperation..
7. Warranty: in 12 month since BL date.
OUR SERVICE:
1. quick response in before sales period help you got order.
2. excellent service in production time let you know each step we made.
3. reliable quality solve you after sale headache.
4. long period quality warranty ensure you can buy without hesitate.
FAQ
Q1: Are you manufacturer?
A: Yes, we are manufacturer. Our factory is in Wenzhou China
Q2: Can I get guarantee of products?
A: Yes, every product is 1 year quality warrantee under customer correct using the products.
Q3: Do you have any Certificate?
A: Yes. Each of our unit has CCC, ISO9001 certificate. All the electric parts with CE certificate, If you need any other Certificate, we can help you to get it.
Q4: How to buy it? What about the delivery?
A: Please contact me by email or online, let me know your situation, I will give you professional solution. We have shipping agent can choosing the cheapest and fastest delivery. FOB, CIF, C&F or EXW are no problem for us.
Q5: What's the payment terms?
A: For small testing orders, we can accept Waster union, T/T and Credit card.
For mass orders, we accept t/t and L/C.
Q6: What about the production?
A: Produce time is 4~6weeks.
Q7: Could you offer some spare parts?
A: Yes, no problem.
Q8: What about the maintenance?
A: All the goods past the test, maintenance is very easy.
Arcing distance
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