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Transformer Bushings of 12, 17.5 KV

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MOQ : 10 Pieces

Transformer Bushings of 12, 17.5 KV Specification

Dimension (L*W*H)
Standard as per IS/IEC, varies with type

Cooling Type
Air cooled / Natural

High Voltage
17.5 kV (max)

Operating Temperature
-40°C to +40°C

Rated Voltage
12-17.5 Volt (V)

Low Voltage
12 kV (min)

Standard
IS 3347/IEC Standard

Product Type
Transformer Bushings of 12, 17.5 KV

Material
Porcelain

Frequency (MHz)
50 Hertz (HZ)

Usage
Transformer

Weight
Approx. 2.5-6.8 kg (depending on bushing size)

Color
Brown/Light Grey

Test Voltage (Power Frequency Withstand)
28/38 kV

Creepage Distance
245-430 mm (as per bushing rating)

Insulation Level
Porcelain Insulated

Mounting Type
Flange or stud type

Current Rating
250-1250 Amps (varies by type)

Application
Indoor and Outdoor Transformers

Arcing Horn
Provided (Optional depending on model)

Terminal Type
Copper/Brass

Transformer Bushings of 12, 17.5 KV Trade Information

Minimum Order Quantity
10 Pieces

Supply Ability
100 Pieces Per Month

Delivery Time
10 Days

About Transformer Bushings of 12, 17.5 KV

Transformer Bushings

(Porcelain Parts) Voltage Class - 12, 17.5 KV

For Heavily Polluted Area

Standard Particulars
Product No.		SC/11/0006	SC/11/0007	SC/11/0008	SC/11/0009
Bushing Rating	KV/AMP	12,17.5kV/250Amp.	12,17.5kV/400-630Amp.	12,17.5kV/1000Amp.	12,17.5kV/2000-3150Amp.
Dimensions	Dia. A (mm)	135	145	165	190
	Dia. B (mm)	140	150	170	190
	Dia C Max (mm)	111	128	163	183
	Dia. D max (mm)	74	88	108	131
	Dia. E min (mm)	32	39	58	74
	Dia. F (mm)	70	85	100	125
	Dia. G (mm)	15+1	24.5+5	32	50
	S (mm)			12	17
	T (mm)	22+1	30.5+5	46+2	62+2
Visible Discharge Voltage		12	12	12	12
Power Frequency	Dry	38	38	38	38
One minute withstand voltage	Wet	38	38	38	38
Impulse withstand voltage		95	95	95	95
Creepage Distance (min)	Mm	280	280	280	280

Reliable Insulation and Safety

Featuring porcelain insulation and test voltages of up to 38 kV, these transformer bushings ensure safe and consistent operation. The creepage distance, tailored as per rating, minimizes leakage and corona discharge. Optional arcing horns further protect against transient overvoltages, enhancing service life and safety.

Flexible Installation Options

Choose between flange or stud mounting types for seamless integration into indoor or outdoor transformer setups. Copper or brass terminals ensure efficient connectivity, while color options in brown and light grey allow for aesthetic compatibility with various installations.

FAQs of Transformer Bushings of 12, 17.5 KV:

Q: How do Transformer Bushings with porcelain insulation improve performance?

A: Porcelain insulation provides excellent mechanical strength and electrical resistance, protecting transformers from environmental factors such as moisture, dust, and pollution. This ensures reliable performance and minimizes maintenance needs.

Q: What is the recommended usage for these bushings?

A: These bushings are specifically designed for transformers with voltage ratings of 1217.5 kV and are suitable for both indoor and outdoor applications. Their construction allows them to handle currents between 250 and 1250 Amps, meeting diverse operational requirements.

Q: When should an arcing horn be provided on the bushing?

A: Arcing horns are optional features recommended for installations where theres a higher risk of transient overvoltages or in outdoor environments. They offer an added layer of protection during electrical surges, enhancing the lifespan of the bushing.

Q: Where are these bushings typically installed?

A: They are typically installed in power distribution and industrial transformers, both indoors and outdoors, across utilities, substations, and manufacturing units throughout India.

Q: What is the manufacturing process for porcelain insulated bushings?

A: The manufacturing process involves shaping high-grade ceramic materials, firing them at elevated temperatures, and then assembling with metallic fittings (copper or brass) for terminals, ensuring a strong, dependable product for high-voltage applications.

Q: How does the creepage distance affect bushing reliability?

A: A greater creepage distance, ranging from 245 to 430 mm, reduces the risk of surface leakage currents and flashovers, especially under high pollution or humidity conditions, thereby increasing operational safety.

Q: What are the benefits of choosing a flange or stud type mounting?

A: Flange or stud mounting types provide flexibility for installation, making it easier to match the bushing to the transformers design requirements, simplifying the replacement process, and ensuring long-term stability.

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