25/0.4KV DRY Power Distribution Transformer

Name: China Customized 25/0.4KV DRY Power Distribution Transformer Manufacturers, Suppliers - FENGYUAN
Brand: FENGYUAN
SKU: 190976379

Dry-type transformers refer to transformers whose iron cores and windings are not immersed in insulating oil. They are widely used in residential quarters, high-tech centers, factories and mines, airports, stations, schools and other places. This series of dry-type transformers are used to directly reduce 35KV electrical grid power supply to 400V distribution power supply for users and omits the stage of 10KV transmission and transformation., which significantly decreases operating costs and engineering construction costs of multi-level substation projects, and have significant social benefits. By optimizing the structure of the high-voltage coil, the distributions of voltage and capacitance between layers are improved, which greatly enhances the impact resistance of products to withstand atmospheric over-voltage and operating over-voltage, as well as improves the electric field distribution and further reduces the partial discharge volume of product.

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Description

25/0.4KV DRY power distribution transformer

Our Three-phase Epoxy-resin Dry-type Transformer is in conformity with the standard of IEC726, GB/T10228-1997, with features of low loss, compact and lightweight, low noise level, damp-proof, high mechanical strength, flame resisting, strong overload ability, and low partial discharge quality. They are applicable to power transmission and distribution systems, especially to heavy load centers and places with special fire protection requirements.

Dry-type transformer Type	Cast resin
Manufacturing Standards	IEC, ANSI,GB
Rated Capacity	Up to 25MVA
Rated Voltage	Up to 36KV
Phases	Single or Three Phase
Tapping	With tapping links or on-load tap changer
Frequency	50Hz or 60Hz
Vector groups	Dy, Yy, Yd as standard. Other on request
Class insulation	According to IEC 60085, Class F or Class H
Type of cooling	AN (natural air),AF, AFWF on request
IP Rate	IP00 to IP54
Environment Class	E2
Environment Class	C2
Fireproof Class	F1

Our SC(B) series epoxy resin cast dry transformer is cast under vacuum with thin insulating bands automatically.

The core is made of a high-permeable grain-orientated silicon sheet and cast with imported epoxy resin.

The coil is reinforced with glass fiber and cast under vacuum with filler epoxy resin. It has good mechanical properties, is free of crack and inner bubble, and has a low local discharge, high reliability, and long service life.

The high and low-voltage systems are cast under vacuum, thus the coil will not absorb moisture, the clamps of the core are subjected to corrosion-resistant treatment and it may run under high temperature or other serious environments.

Working Conditions:

No.	Conditions		Units	Parameter Values
1	Rated Voltage		kV	10
2	Highest Operating Voltage		kV	12
3	System Neutral Point Earthing Mode			Unearthed
4	Rated Frequency		Hz	50
5	Pollution Grade			d(Ⅲ)
6	System Short Circuit Current Level (High Voltage Side)		kA	20
7	Ambient Temperature	Maximum Daily Temperature	℃	40
		Minimum Daily Temperature	℃	-25
		Maximum Daily Temperature Difference	K	25
		Average Temperature of the Hottest Month	℃	30
		Maximum Annual Average Temperature	℃	20
8	Humidity	Average Daily Relative Humidity	%	≤95
8	Humidity	Average Monthly Relative Humidity	%	≤90
9	Altitude		m	≤1000
10	Solar Radiation Intensity		W/cm2	0.1
11	Maximum Icing Thickness		mm	20
12	Maximum average wind speed: keeping in good conditions for 10min at 10m from the ground level		m/s	35
13	Earthquake Resistance	Horizontal Ground Acceleration	m/s2	2
13	Earthquake Resistance	Safety Coefficient of 3 Since Resonance Cycles		≥1.67
14	Installation Site			Indoor
Note 1: Values about temperatures in the table must be adjusted accordingly if the lowest ambient temperature is above -25℃. Note 2: Pollution grade diagram must be provided if the pollution grade is grade IV.

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FAQ

Q5 : Is OEM/ODM available?

A: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.

Q6 : You are manufacturer or trading company?
A: We are factory, As a 100% professional manufacturer with 20 year's manufacturer experience, we could produce products according to customers' requirements and we could also control the quality of products 100%.

Q7 : Can the price be negotiated?

A: Yes, the price is negotiable. It can be changed according to your quantity or package

Q8 : How about inspection?

A: We have the whole inspection system from raw material to end products include temperature rise test,salt spraying test conductor type test,mechanical life test.

Q9 : What is payment terms?

A: T.T, Paypal,Western Union,Alibaba trade assurance and L/C is acceptable. 30% T/T in advance ,70% balance before shipment.

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Jiyuan Fengyuan Electrical Equipment Co., Ltd