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
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