QBN/QBJ/QBG series porcelain post-type insulator
Single/Double insulation 25kV
Specifications
| Model | QBN/QBJ/QBG |
|---|---|
| Standard | GB/T 11030-2008, TB/T 3199 series (Insulators for electrified railway OCS) |
| Rated Voltage | 25kVOCS systems |
| Operating Temperature | -40℃~+70℃ |
| Altitude | <4000m |
| Materials | highstrengthporcelain/composite silicone-rubber insulator, zinc-sleeve steel pin |
| Installation | cantilever, positioning and suspended installation at tensioning points |
Other common porcelain post-type insulator models, covering single-insulation and double-insulation classes, for 25kV electrified railway OCS, Standard TB/T 3199.1-2018 and GB/T 11030-2008.
Single insulation: QBN-25/8-1400, QBN-25/12-1400, QBN-25/16-1400, QBN-25/20-1400; QBJ-25/8-1400, QBJ-25/12-1400, QBJ-25/16-1400, QBJ-25/20-1400; QBG-25/8-1600, QBG-25/12-1600, QBG-25/16-1600, QBG-25/20-1600.
Double insulation: QBSN-25/8-1600, QBSN-25/12-1600, QBSN-25/16-1600, QBSN-25/20-1600; QBSJ-25/8-1600, QBSJ-25/12-1600, QBSJ-25/16-1600, QBSJ-25/20-1600; QBSG-25/8-1600, QBSG-25/12-1600, QBSG-25/16-1600, QBSG-25/20-1600.
Product Overview
The porcelain post-type insulators (QBN/QBJ/QBG series) produced by Henan Chuangwit Railway Equipment Co., Ltd. — QBN/QBJ/QBG single-insulation and QBSN/QBSJ/QBSG double-insulation series for 25kV OCS, cantilever load 8-20kN, creepage distance 1400/1600mm.
Key Features
- antipollution flashoverperformanceverified in long-term line service
- porcelain/composite/double insulation full series
- Creepage distanceperpollution classselection matching
- mechanical load classcomplete
Compliance & Quality Control
Complies with GB/T 11030-2008 and the TB/T 3199 series (Insulators for electrified railway OCS) with full 8-20kN cantilever load classes; each porcelain body passes an individual mechanical load test and composite types are impact-proof without shattering.Dry/wet power-frequency withstand voltage, lightning impulse withstand voltage and creepage distance meet TB/T 3199 — double-insulation types offer higher reliability.The company holds CRCC railway product certification and ISO9001 quality management system certification; every piece (batch) is delivered only after passing factory inspection.
Operating Conditions & Typical Applications
for different pollution class sections, bearing both mechanical load and electrical insulation duties. Typical applications include: Mainline cantilever suspension:, Heavily polluted coastal sections:, Tensioning insulation: and Cold regions: etc..
Selection & Service
We provide selection verification and non-standard customization based on line conditions and operating parameters, Products follow CRCC railway product certification and ISO9001 quality management system requirements; key parameters are verified by factory inspection and type tests. For selection consulting and quotations, please call 0375-6051688.
Performance
Operating Conditions
for different pollution class sections, bearing both mechanical load and electrical insulation duties.
Mechanical Performance
Cantilever load8~20kN classcomplete, each porcelain body passes an individual mechanical load test; composite type is impact-proof without shattering.
Electrical Performance
Dry/wet power-frequency withstand voltage, lightning impulse withstand voltage and creepage distance meet TB/T 3199 — double-insulation types offer higher reliability.
Applications
Mainline cantilever suspension:
mainline cantilevers use porcelain post-type insulators (QBN/QBJ/QBG series) to insulate live parts from masts.
Heavily polluted coastal sections:
large-creepage porcelain post-type insulators (QBN/QBJ/QBG series) prevent pollution flashover in coastal heavily polluted sections.
Tensioning insulation:
at tensioning points, porcelain post-type insulators (QBN/QBJ/QBG series) bear tension and provide insulation.
Cold regions:
porcelain post-type insulator bodies (QBN/QBJ/QBG series) resist freeze-thaw stably in cold regions.
