Send Message

300 Kva Three Phase Pad Mounted Oil Immersed Distribution Transformer 25Kv

Basic Information
Place of Origin: CHINA
Brand Name: WINLEY
Certification: CE,ISO
Model Number: S-300/25
Minimum Order Quantity: 1unit
Price: $5000-$150000
Packaging Details: Plywood case
Delivery Time: 30days
Payment Terms: T/T
Supply Ability: 1000set/month
Detail Information
Transformer Feed Type: Loop Feed Capacity: 300KVA
Primary Voltage: 24940GrdY/14400 Secondary Voltage: 208Y/120
Vector Group: YnYn0 Phase: Three Phase
Temperature Rise: 65°C Efficiency: 99.00%
High Light:

Oil Immersed Distribution Transformer 25Kv


300Kva Oil Immersed Distribution Transformer


3Phase Pad Mounted Transformer

Product Description

300 Kva Three Phase Pad Mounted Oil-Immersed Distribution Transformer 25Kv





The three phase pad mounted transformer immerses the load switch and fuse on the high voltage side of the transformer with the core and windings of the transformer in the same oil tank, has the advantages of advanced structure, reliable performance, energy saving and consumption reduction, flexible use, strong adaptability, and economical advantages.


Main data

Transformer Type Pad Mounted, Compartmental-Type
Transformer Feed Type Loop Feed
Operation Step-Down Operation
Phase Three Phase
Capacity 300 KVA
Vector Group YnYn0
Primary Voltage 24940GrdY/14400
Primary Voltage Class 25 kV Class
Primary Phasor Grounded Wye
Primary BIL 125 KV
Secondary Voltage 208Y/120
Frequency 60 Hz
Temperature Rise 65°C
Insulation Rating Class E Insulation - 120°C, 248°F
Cooling Class KNAN; Self-Cooled
Impedance 3.10-5.75%
Load Break Switch Rating 200-Amp, 25 kV
Winding Material Copper
Ambient Temperature Rating 40°C
Ambient Operating Temperature Range -40°C to +40°C (-50°F to +104°F)
Sound Level 55 dBA
Dimensions 61-W x 54-D x 69-H
Efficiency 99.00%
Based on transformer operating at 50% of nameplate base kVA.  
Load Losses Based on 85°C Reference Temp.  
No Load Loss (in watts) +/- 500W
Full Load Loss (in watts) at 100% +/- 3,000W




1) 3 Phase Pad-mounted Transformer has strong overload capacity. It allows 2 times of overload for 2 hours. It can even be overloaded 1.6 times for 7 hours without affecting the service life of the 3 Phase Pad-mounted Transformer.
2) 3 Phase Pad-mounted Transformer adopts elbow plug connector. It can be very convenient for the connection of high-voltage incoming cables. Used as a load switch in emergencies. It can be plugged and unplugged under power.
3) The 3 Phase Pad-mounted Transformer is protected by double fuses. The plug-in fuse (BAY-o-net) is a dual sensitive fuse (temperature, current) to protect the short-circuit fault that occurs on the secondary side of the 3 Phase Pad-mounted Transformer. The backup current-limiting protection fuse (ELSP) protects the internal faults of the 3 Phase Pad-mounted Transformer and is used to protect the high-voltage side.
4) The 3 Phase Pad-mounted Transformer can use Fr3 vegetable oil or mineral oil. It can be selected according to its situation.
5) 3 Phase Pad-mounted Transformer adopts a fully enclosed structure design. It places windings, iron cores, fuses, and high-voltage load switches in the oil tank.


Technical drawings

150KVA Three Phase Pad Mount electrical  Transformer Oil Immersed 13.8KV 3




Rated Capacity Loss(w) Dimension(mm) Weight(kg)
No-load Loss(W) On-load Loss W D H Oil Weight (L) Total Weight (KG)
45kVA 160 1000 1730 990 1270 416 950
75kVA 180 1250 1730 990 1270 435 1020
150kVA 280 2200 1730 1245 1270 473 1225
300kVA 480 3650 1830 1295 1270 605 1655
500kVA 680 5100 2260 1345 1270 720 2110
750kVA 980 7500 2260 1448 1628 1022 2950
1000kVA 1150 10300 2260 1500 1625 1325 3720
1500kVA 1640 14500 2210 1470 2150 1552 4672
2000kVA 2160 20645 2380 1600 2220 1855 5670
2500kVA 2680 27786 3070 1650 2330 2006 6580
3000kVA 3300 30300 3260 1850 2460 2336 7500
3750kVA 4125 37875 4080 2060 2680 2650 8450


Production process


150KVA Three Phase Pad Mount electrical  Transformer Oil Immersed 13.8KV 4

150KVA Three Phase Pad Mount electrical  Transformer Oil Immersed 13.8KV 5

150KVA Three Phase Pad Mount electrical  Transformer Oil Immersed 13.8KV 6




1. Q: Can I have a sample order?

A: Yes, we welcome sample order to test and check quality.

2. Q: What is the lead time?

A: Mass production time 15-25 days.

3. Q: How long is the warranty?

A: 24 monthes from B/L. If there are any accessory problems,just provide the photos of damaged accessory,then we will provide free service. According to the number of products,we will provide easily damaged accessories for free. we also can provide technical support if you need.

4. Q: Is OEM/ODM available?

A: Yes,it is! We are manufacturer with our own R&D team, we can customize products according to customer's drawing or requirements.

Customized services:

a. Customized color and special function.

b. Customized box.

c. Print customer's logo.

d. Your other ideas about product, we can help you design and put them into production. The above customized services must be confirmed before production.

5. Q: How to control the products quality?

A: Our company owns the core technology ,all kinds of products hold CE certificate. We have professional engineers. Workers are strictly required to make products according to the drawings. Each process has technical instructors.The QC supervisors will regularly inspect the production. We will do products performance tests during production, and comprehensive quality tests when the products is completed.

Contact Details

Phone Number : 86-18650108051

WhatsApp : +8618650108051