11kv Spool Type Porcelain Insulator for Station Post（BS)

Porcelain insulators,also named ceramic Insulators are made from clay, quartz or alumina and feldspar, and are covered with a smooth glaze to shed water. Insulators made from porcelain rich in alumina are used where high mechanical strength is a criterion. Porcelain has a dielectric strength of about 4–10 kV/mm.It also has perfect dielectric performance.Porcelain insulators are widely used in overhead transmission lines to provide mechanical support and electrical protection, as well as in distribution lines and substations. Depending on voltage considerations, different kinds of insulators are used in power systems,we have Pin insulator,strain insulator,suspension insulator.post insulator,long rod insulator,horizontal post insulator,Railway insulator,shackle insulator,stay insulator.

Availability:



Inquire Add to Basket

Model:
Pw-11-Y

Description

Product Overview

Our 11kV Spool Type Porcelain Insulator for Station Post is a BS-compliant, high-performance insulation component engineered for reliable electrical insulation and mechanical support in medium-voltage power systems. Crafted from premium alumina-rich porcelain blended with clay, quartz and feldspar, this spool type porcelain insulator features a smooth water-repellent glaze, delivering a dielectric strength of 4–10 kV/mm and exceptional dielectric stability. The flagship Pw-11-Y model is optimized for 11kV-15kV systems, with 22kV and 33kV variants available to meet diverse project needs. Designed to withstand electromechanical stresses from environmental and load fluctuations, this porcelain station post insulator prevents flashover and mechanical failure, safeguarding long-term stable operation of overhead transmission and distribution lines and substations.

Technical Specifications

Main dimensions and standard particulars
Fig			1	2	3
Class BS			Pw-11-Y	Pw-22-Y	Pw-33-Y
Main Dimensions (mm)	H		185	255	320
	h		32.65	32.65	32.65
	D		170	205	240
	d		76	76	76
	d1		27.78	27.78	27.78
	R1		16	16	16
	R2		16	16	16
Nominal Voltage (kV)			15	22	33
Creepage Distance (mm)			432	673	851
Minimum Flashover Voltage	Power-frequency	Dry (kV)	100	125	140
	Power-frequency	Wet (kV)	65	95	110
	50% Impulse Positive		150	190	210
	50% Impulse Positive		150	190	210
Withstand Voltage	One minute power- frequency	Dry (kV)	90	110	125
	One minute power- frequency	Wet (kV)	60	90	100
	impulse (kV)		140	180	200
Radio- Inﬂuence- Voltage Data	Test Voltage to Ground (kV)		22	30	44
Radio- Inﬂuence- Voltage Data	Maximum RIV at 1000kHz (uV)		12000	16000	25000
Cantilever Failing Load(kN)			11	11	11
Weight (kg)			5	10	13

Core Performance Advantages

High-Strength Mechanical & Dielectric Performance

The alumina-rich porcelain formula delivers a stable 11kN cantilever failing load, withstanding long-term mechanical stress from overhead lines. Its industry-leading dielectric strength ensures reliable insulation against operating voltage, lightning overvoltage and internal overvoltage, eliminating breakdown and surface flashover risks.

Weather & Pollution Resistant Design

The dense, smooth glaze effectively sheds rainwater and resists environmental fouling, reducing leakage current and maintaining stable insulation in harsh outdoor conditions. Optimized creepage distance adapts to both normal and heavy-pollution grid environments.

Low Radio Interference & BS Compliance

Strictly controlled radio-influence voltage (RIV) performance avoids corona discharge under rated voltage, preventing interference with surrounding radio and television reception. All high voltage porcelain spool insulators are fully compliant with BS standards, with interchangeable fittings for simplified on-site installation and maintenance.

Target Applications

This 11kV porcelain spool insulator is tailored for power utility companies, electrical engineering contractors, substation equipment integrators and railway power infrastructure operators, with core applications including:

11kV-33kV overhead transmission and distribution lines

Substation and station post fixed installations

Railway electrification power supply systems

Industrial medium-voltage power distribution networks

Rural power grid upgrade projects

Customization & Bulk Supply Services

We offer flexible customization for dimensions, creepage distance and design modifications to match unique project requirements. Sufficient stock of standard models supports bulk orders, with fast global shipping and dedicated order tracking for bulk purchasers. OEM and ODM services are available to align with your brand and technical specifications.

Why Choose HAIVOL

HAIVOL is a trusted manufacturer of power insulation components, with decades of experience serving power system operators and engineering partners worldwide. All our station post porcelain insulators undergo strict electrical, mechanical and environmental testing before delivery, ensuring consistent quality. We offer competitive factory-direct pricing, reliable bulk supply capacity, professional technical support and responsive after-sales service, making us your ideal long-term partner for power insulation solutions.

FAQs

What standards do your spool type porcelain insulators follow?

Our insulators are fully manufactured and tested in accordance with BS standards, with all performance indicators meeting or exceeding medium-voltage power system requirements.