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OLTC Distribution Transformer

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MOQ : 1 Unit

OLTC Distribution Transformer Specification

Cooling Type
ONAN (Oil Natural Air Natural)

Low Voltage
433 V

Standard
IS 1180 (Part-1)/IEC 60076

Dimension (L*W*H)
Approx. 2100 x 950 x 1700 mm

Capacity
100 kVA - 2500 kVA

Rated Voltage
11 kV

Coil Material
Electrolytic copper

Load Loss
As per IS 1180/IEC standards

Operating Temperature
-25C to +50C

Voltage Booster Type
On Load Tap Changer (OLTC)

High Voltage
11000 V

Product Type
OLTC Distribution Transformer

Material
Copper

Output
Product wise

Frequency (MHz)
50 Hertz (HZ)

Efficiency
99.9%

Phase
Three Phase

Usage
Voltage regulation and distribution in power networks

Coil Structure
Layered coil

Coil Number
Two (Primary and Secondary)

Power Scope
Up to 2500 kVA

Weight
Approx. 2500 kg

Paint Finish
PU Paint with anti-corrosive finish

Noise Level
< 60 dB at 1 meter

Cooling Oil Type
Mineral insulating oil

Protection Grade
IP 54

Impedance Voltage
As per client specification (usually 4-6%)

Insulation Level
HV: 28kV/75kVp, LV: 3kV/10kVp

Tapping Range
+5% to -15% in 17 steps

Winding Connection
Dyn11 or as specified

Regulation
Automatic via remote or local control

Bushings
Porcelain or polymer

Mounting Type
Pole mounted or platform mounted

Accessories
Oil level indicator, Buchholz relay, Temperature gauge, Conservator, Radiators, Breather, Lifting lugs, Earthing terminals

Thermal Class
Class A/FA

Service Condition
Outdoor/Indoor

OLTC Distribution Transformer Trade Information

Minimum Order Quantity
1 Unit

Supply Ability
100 Units Per Month

Delivery Time
2-3 Months

About OLTC Distribution Transformer

Established in the year 1991, we have been betrothed in manufacturing, exporting and supplying top quality Transformer with OLTC. This transformer is manufactured with the use of quality-checked components and cutting-edge techniques by our technical experts. Provided transformer is widely used for proper voltage regulation at several residential, commercial and industrial places. Besides, our valuable patrons can avail this Transformer with OLTC from us at market leading prices.

Key Points of Transformer with OLTC:

Sturdiness
Longer service life
Excellent performance
Noise free functioning

Exceptional Voltage Regulation

The OLTC Distribution Transformer incorporates an On Load Tap Changer (OLTC) providing seamless voltage adjustments in 17 steps within a +5% to -15% range. This ensures network stability and steady voltage delivery, even under fluctuating load conditions. Automatic control options-both local and remote-enhance operational flexibility and help minimize manual intervention for improved management.

Durability and Protection

Built to withstand challenging environments, this transformer features a PU anti-corrosive paint finish and an IP54 protection grade, safeguarding it from moisture, dust, and corrosion. It supports both pole and platform mounting options, with robust porcelain or polymer bushings, ensuring longevity and reliable performance in outdoor or indoor settings.

Efficient and Reliable Performance

With an efficiency rating of 99.9%, the transformer minimizes losses and maximizes energy transfer. Its construction-using electrolytic copper windings and high-grade insulation-ensures compliant operation at 50 Hz frequency and within temperature extremes of -25C to +50C. The cooling system utilizes mineral oil with ONAN type, ensuring optimal thermal management.

FAQ's of OLTC Distribution Transformer:

Q: How does the OLTC transformer regulate voltage within a network?

A: The OLTC Distribution Transformer uses an On Load Tap Changer mechanism that adjusts voltage in 17 steps over a +5% to -15% range. This allows it to maintain a consistent output voltage despite variations in the input supply or load, with regulation controlled remotely or locally for maximum flexibility.

Q: What are the main benefits of using this transformer in power distribution systems?

A: Key benefits include high energy efficiency (99.9%), superb voltage regulation, minimal maintenance due to automatic controls, robust protection against environmental hazards, and compliance with international standards (IS 1180/IEC 60076). These features ensure reliable and cost-effective operation in commercial and utility applications.

Q: When should I choose pole-mounted versus platform-mounted installation?

A: Pole mounting is ideal for compact, outdoor installations where space is limited and distribution lines are elevated. Platform mounting is generally used for larger units or when additional stability and accessibility for maintenance are required, such as in substations or indoor settings.

Q: Where can this OLTC transformer be operating effectively?

A: This transformer is engineered for both indoor and outdoor environments, operating reliably in ambient temperatures from -25C to +50C. Its IP54 rating and anti-corrosive finish make it suitable for harsh industrial or utility installations across urban and rural settings.

Q: What process ensures the safety and protection of the transformer during operation?

A: The transformer includes a range of safety accessories such as an oil level indicator, Buchholz relay, temperature gauge, conservator, radiators, breather, and earthing terminals. These components monitor and protect against overtemperature, oil leaks, and insulation failures, while the IP54 enclosure guards against environmental ingress.

Q: How is the transformer's noise level managed during operation?

A: The transformer is engineered to operate quietly, with a maximum noise level below 60 dB at a distance of 1 meter. This design consideration makes it suitable for installation in populated areas, reducing acoustic disturbances.

Q: What are the typical applications and usage scenarios for this transformer?

A: Primarily used for voltage regulation and distribution in power networks, this transformer is ideal for utility substations, industrial plants, commercial complexes, and rural electrification projects, helping ensure steady power delivery and optimal network management.

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