Name: C4-80 II 10kV Porcelain Post Insulator GOST
Brand: Pingxiang Risheng Electric Porcelain Co., Ltd.

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C4-80 II 10kV Porcelain Post Insulator GOST

Product Overview

A GOST-pattern solid-core post insulator for 10 kV switchgear, used to support the live parts of disconnectors and circuit breakers inside distribution assemblies. Test voltage is 80 kV against a 10 kV rating, minimum breaking force is 4 kN, and a unit weighs 2.75 kg. The ceramic body is group 120 electrotechnical porcelain to GOST 20419-83, with AK12 aluminium alloy or nodular iron fittings.

GOST

Why Buyers Choose This Part

Built to the GOST material specifications Russian and CIS buyers ask for by clause
80 kV test voltage against a 10 kV rating leaves clear dielectric margin
4 kN cantilever strength with 100 N.m torsion strength for switch operating loads
Silicone sealant on the cement joints keeps water out of the armature seam

Where It Is Used

10 kV disconnectors and circuit breakers in distribution switchgear
Indoor switchgear assemblies built to GOST and UKhL1 climatic classes
Replacement of aged C4-80 II units during switchgear refurbishment
Switchgear manufacturers exporting to CIS markets

Who It Suits

Switchgear manufacturers building to GOST specifications
Utilities in Russia and CIS countries maintaining 10 kV assemblies
Distributors supplying GOST-pattern electrical porcelain

What Goes Wrong Without The Right Part

Finding a supplier that will hold the GOST material clauses, not just the dimensions
Post insulators that loosen at the cement joint after a few switching seasons
Torsion failures when the insulator is used as the operating shaft support
Long procurement lead times on discontinued GOST part numbers

How It Is Built

Rated 10 kV with 80 kV test voltage
Minimum mechanical breaking force 4 kN
300 mm creepage distance
100 N.m torsion strength
UKhL1 climatic execution
2.75 kg unit weight

Published Figures For This Product

Every value below comes from the manufacturer data for this item. Figures not listed are confirmed against the drawing before an order is placed.

Minimum Mechanical Breaking Force	4 kN
Creepage Distance	300 mm
Torsion Strength	100 N.m
Unit Weight	2.75 kg
Cantilever Strength	4 kN
Rated Voltage	10 kV
Test Voltage	80 kV

Materials

Group 120 electrotechnical ceramic to GOST 20419-83
AK12 aluminium alloy fittings to GOST 1583-93, or nodular iron
PTs-500 DON Portland cement bonding to GOST 10178-85
Silicone sealant on the cement joint

Process

Body extrusion and turning
Glazing
Firing
Cement bonding of fittings
Joint sealing
Electrical test

Testing

Cantilever load proof test to the 4 kN figure
80 kV test voltage applied on routine test
Cement joint and sealant inspection before despatch

Certification

Material specifications to GOST 20419-83, GOST 1583-93 and GOST 10178-85
ISO 9001 quality management system

Customisation Options

Aluminium alloy or nodular iron fittings as your specification requires
Produced to customer drawings and samples
Marking to your part numbering

How It Compares

IEC pattern post insulator	Same job, different dimensional and material standard. Specify the C4-80 II when the switchgear drawing calls out GOST clauses.
Cast resin post insulator	Porcelain keeps its surface in UV and does not creep under sustained cantilever load, which matters where the insulator carries an operating shaft.