10-30 NF 250A 10-300 NF 630A DIN Transformer Bushing Insulator DIN42531 DIN42532

Description

The Threaded Bushings for voltage of 10-30kV are supplied assembled with the respective porcelain, NBR gaskets, copper threaded rod, blued steel spin grip nut, zinc-plated brass connector and stainless steel lock washer and nut.

High-voltage bushings are either oil-filled or condenser bushings. Oil-filled bushings have a central conducting rod or tube through which the conductor passes. Around this, a series of insulating barriers are held apart by spacers. The barriers and spacers are enclosed in a skirted porcelain shell that is filled with oil. Condenser bushings are similar except that the central rod is wound with alternating layers of insulation and foil. This results in a path from the conductor to the case consisting of a series of condensers. The layers are designed to provide an approximately equal voltage drop between each condenser. In some condenser bushings, the whole bushing is enclosed in a skirted porcelain shell. Other types have only the exposed part of the bushing enclosed in the porcelain shell.

1.Material: porcelain insulator

2.Glaze color: Brown

3.Rated voltage: 10-30KV

4.Rated current: 250-630A

5.Standard: DIN

Our Advantage

* Good strength

* Good insulating properties

* Lightning-withstand

* Anti-corrosion

* Rustproof

* Mature brass processing

* Using bright tin makes it not easy to be scratched

Pos. No.	Description	Material	Pcs.
1	Porcelain A	C110	1
2	Connecting Pipe	Cu-ETP	1
3	Ring	Cu-ETP	1
4	Press ring	CuZn40Pb2	1
5	Pipe	Cu-ETP	1
6	Lower Cap	CuZn40Pb2	1
7	Flat gasket	PA6	2
8	Screw	CuZn40Pb2	2
9	Upper Cap	CuZn40Pb2	1
10	Eyele	–	2
11	Screw	A2	2

Type	Type Outdoor	indoor	a mm	b mm	c mm	e mm	I1 mm	d1	d2 mm	d3 mm	d4	Weight kg
DT 10 NI 250	——	10 N	260	76	ca.60	85	321	M12	78	8	M8	3,6
DT 10 NF 250	10 N	——	310			85	371					4,5
DT 20 NI 250	——	20 N	310			155	371					4,6
DT 20 NF 250	20 N	——	385			155	461					6,1
DT 30 NI 250	——	30 N	385			220	461					6,2
DT 30 NF 250	30 N	——	485			220	561					7,5
DT 10 NI 630	——	10 N	292	108	ca.75	85	353	M20	90	12	M12	5,7
DT 10 NF 630	10 N	——	342			85	403					7,2
DT 20 NI 630	——	20 N	342			155	403					7,3
DT 20 NF 630	20 N	——	417			155	493					9,2
DT 30 NI 630	——	30 N	417			220	493					9,3
DT 30 NF 630	30 N	——	522			220	618					12,2

Pos. No.	Description	Material	250A Pcs.	630A Pcs.
12	Arcing horn holder	A2	1	1
13	Hexagon nut	A2	3	3
14	Spring Lock Washer	A2	2	2
15	Flangering	Al	1	1
16	Press bit	G-ZnA16Cul	4	6
17	Washer	A2	4	6
18	Hexagon nut	A2	4	6
19	Gasket J	NBR	1	1
20	Flat gasket N	NBR	1	1
21	Gasket 0	Pressspan	1	1