voltage transformer0 pages

66(72.5)(TA,TH)(W,,W2)Wa) Voltage Transforn

Type description

J D C F-66(72.5) (TA.TH) (W1 ,W2,W3)

Pollution level

Wet tropical zone

Dry tropical zone

Rated voltage (kV)

Individual measuring and protective winding

Cascade structure

Single-phase

Voltage transformer

I Purpose

It is outdoor, single phase and oil immersed inductive voltage

transformer, which is used for metering and relay protection

of 66kV, 50 or 60Hz system.

I Standards

lECStandard: IEC 60044-2 (Inductive Voltage Transformer)

National Standard: GB1207 (Voltage Transformer)

GB311.1 {Insulation co-ordination for high

voltage transmission and distribution equipment)

I Service condition

Ambient temperature: -40~+40t

Altitude; less than 1000m

Environment pollution level: Ik UK IV

I System condition

System Rated Voltage: 66kV

System Highest Voltage: 72.5kV

System Rated frequency: 50Hz or 60Hz

System neutral earthing method: Non-effectively earthed

I Structure feature

• It is cascade structure, which the primary winding has two

grade windings surrounded on each limbs of one single

phase two—limb core. The insulation consists of high

voltage cable paper, phone paper and cardboard etc., Which

will be immersed with transformer oil after desiccating under

vacuum. It has advantages of stable and reliable performance

of insulation, rich successful experience, a long life time

and convenient maintenance.

• Perfect fluidity performance of transformer oil is good for heat

dissipation, it also has self recover ability for the failure of partial

discharge caused by air bubble and dust.

• It has three secondary windings, which has individual

measuring and protection winding.

• Hermetically sealed stainless steel metallic bellows is installed on

the top, which protect the transformer oil from moisture and extend

the life time, also there is a oil level gauge on the bellows for

observing the changing of oil volume.

• There is a multi function oil drain valve on the base, which

make it more convenient for sampling draining and refilling.

• The secondary terminal board is made of epoxy casting, the seal

performance is more reliable.

• The base use DACRAL(Zinc/chormate coatings) for resistance

to corrosion, which gives a high degree of corrosion resistance.

Add: Meichi Industrial Zone.Yunlong town, Ningbo City, zhejiang Pronice, P.R.China HTTP://www.top-electric.com

TEL: +86 ( 574 ) 88079260 FAX: +86 ( 574) 88079270 E-MAIL: huayuan@top-electric.com

page 9