Specifications

Single phase pole-mounted distribution transformer are also suitable for light and diversified power applications.

Summarization:

 

The single-phase oil- filed pole-mounted distribution transformers are specifically designed for the decentralization distribution network of servicing residential overhead distribution loads of town and countryside. They are also suitable for light and diversified power applications. These transformers are designed for the application conditions normally encountered on electric utility power distribution systems.

 

Offer 2 basic transformer types and 2 kind metal core type conventional type and complete self protecting type. And for the transformer core, 2 type materials are available: C.R.G.O wound core and amorphous metal core.

 

Standards:

IEEE C57.12.00    IEEE C57.12.20

ANSI C 57.12.00   IEEE C57.12.20   IEC 76   GB10318

 

Feature of outer structure:

 

1. Cover mounted high voltage porcelain bushings with eyebolt terminals are mounted on flat embossments on the cover and have undercut gasket seats for improved sealing.  The eyebolt connectors are cast bronze plated with tin to accommodate both aluminum and copper conductors.
2. One –piece fasten ring prolongs the life of the transformer, facilitated inspection and maintains even pressure around the entire rim, it combines with a specially formed tank rim, draw cover and gasket to form an effective seal which will not deteriorate with age.
3. Low voltage tank-wall bushing terminals are clamp type and tinplated.
4. Tank is equipped with self-sealing pressure release device.
5. Support lugs, welded to the tank, conform to ANSI standards are made of hot-rolled steel.
6. Tank is supplied with a tank grounding bolted ring-type connector suitable for use with copper or aluminum.

Conventional type:

The transformer is cylinder sealing structure. Each one is fixed with grounding devices, hooks, support lug which conform to ANSI standard, and one or two high voltage bushing on the cover, low voltage bushing on the wall of the tank and eyebolt connecting terminals. High voltage taps should be connected when the power is cut off.

 

Complete self-protected type:

This transformer is complete self-protected type. Which can protect itself from thunder and lighting, short circuit and protect the transiting and distribution line from current failure because of self-malfunction.

Except from some similarities such as: cylinder tank, hooks, lifting lugs, grounding devices, nameplates core and winding with conventional type. This type of transformer has characteristic and devices as follows: one or two high voltage bushings in which there is fuse:

One or two arresters, on the wall of the tank, whose top end is near to the high voltage bushing, and connected to the bushing by copper strip;

One secondary breaker switch above the winding inside tank, and here are operating handle, overload reset and signal light. Low voltage bushing induced from the wall of the tank, grounding device is fixed to position X2.

Core: C.R.G.O core and amorphous metal core can be chosen.

5-50KVA

Technical data for D15 series single-phase pole-mounted distribution transformer (Amorphous metal core)

 

Type	Rated (KVA)	HV     (V)	Tapping (%)	LV   (V)	Loss (W)		Dimension(mm)					Weight(kg)
					No-load loss	Full-load loss	A	B	C	D	E	Oil weight (kg)	Total weight (kg)
D15-5	5	13200/ 7620 Or 11000 /6350	±2 X 2.5% or 0	120 /240 /480 or 120-240 240-480	7	103	840	400	480	310	286	17	92
D15-10	10				10	180	864	430	510	340		24	100
D15-15	15				14	210	914	430	510	340		26	125
D15-25	25				18.5	320	1041	480	560	380		33	162
D15-37.5	37.5				24	500	1120	520	610	450		54	240
D15-50	50				95	375	1245	520	610	450		62	295
D15-75	75				135	580	1245	600	680	510	591	78	420
D15-100	100				54	960	1270	640	710	510		89	465
D15-167	167				76	1460	1470	940	840	610		140	650
D15-250	250				150	1900	1560	1260	960	660		250	950
D15-333	333				200	2600	1660	1260	960	660		300	1200