Name: QS11404 QS11405 IEC Pin Post Insulator 22kV 12.5kN
Brand: Pingxiang Risheng Electric Porcelain Co., Ltd.

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QS11404 QS11405 IEC Pin Post Insulator 22kV 12.5kN

Product Overview

A 22 kV pin post porcelain insulator supplied in two catalogue numbers, QS11404 and QS11405, both rated 12.5 kN cantilever. The QS11404 gives 520 mm creepage with 260 mm protected and a 260 mm dry arcing distance at 10 kg. The QS11405 gives 599 mm creepage with 200 mm protected and a 240 mm dry arcing distance at 9.2 kg. Both share 90 kV dry and 65 kV wet power frequency withstand and 150 kV impulse withstand.

Why Buyers Choose This Part

Two creepage options at the same 12.5 kN cantilever rating
150 kV impulse withstand on both catalogue numbers
Protected creepage published separately so the choice is informed
RIV held to 100 µV at 1000 kHz tested at 22 kV to ground

Where It Is Used

22 kV distribution lines on pin post construction
Sites where total creepage and protected creepage trade off differently
Compact line designs needing rigid conductor support
Projects specified against the QS catalogue numbers

Who It Suits

Line engineers choosing between creepage profiles at 22 kV
Contractors building 22 kV pin post lines
Distributors supplying QS series pin post insulators

What Goes Wrong Without The Right Part

Choosing insulation by total creepage alone when the shed profile matters
Weight limits on structures that a 10 kg unit would exceed
Radio interference constraints near communication installations
Mixed catalogue numbers within one line project

How It Is Built

QS11404: 520 mm creepage, 260 mm protected creepage, 260 mm dry arcing distance, 10 kg
QS11405: 599 mm creepage, 200 mm protected creepage, 240 mm dry arcing distance, 9.2 kg
12.5 kN cantilever strength on both
90 kV dry power frequency withstand voltage
65 kV wet power frequency withstand voltage
150 kV impulse withstand voltage
22 kV test voltage to ground
Maximum RIV 100 µV at 1000 kHz

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.

Cantilever Strength On Both	12.5 kN
Dry Power Frequency Withstand Voltage	90 kV
Wet Power Frequency Withstand Voltage	65 kV
Impulse Withstand Voltage	150 kV

Materials

Electrical porcelain body
Galvanised metal base fitting

Process

Forming
Glazing
Firing
Base fitting assembly
Cantilever and RIV testing

Testing

Cantilever proof test at 12.5 kN
Impulse withstand verification at 150 kV
RIV measurement at 22 kV to ground

Certification

ISO 9001 quality management system

Customisation Options

Choice of QS11404 or QS11405 profile
Base fitting matched to your bracket
Produced to drawing or sample

How It Compares

QS11404 against QS11405	The 11405 has 79 mm more total creepage but 60 mm less protected creepage, and is 0.8 kg lighter. Where rain washing is unreliable, the higher protected figure of the 11404 is usually the safer choice.
ZS-600 pin post	The ZS-600 gives 600 mm creepage at 24 kV and 13 kN. Comparable duty on a different catalogue, so match to whichever your specification quotes.

Before You Order And After It Arrives

Compare protected creepage, not just total creepage, when choosing between the two
Keep cantilever load within 12.5 kN on both versions
Note the weight difference when planning structure loading
Confirm the catalogue number on the order to avoid a mixed delivery