ZJ-24Q/110×190, 210, 225 Post Insulators
Product Overview
ZJ-24Q/110×190/110×210/110×225 Post Insulators are indoor high-voltage epoxy resin cast-type post insulators. Manufactured using the Automatic Pressure Gelation (APG) process, these insulators combine high dielectric strength, superior mechanical performance, and excellent resistance to contamination and moisture. They require no special routine maintenance — periodic surface cleaning is sufficient to ensure stable long-term operation. These insulators serve as core components for supporting and insulating current-carrying parts in 24 kV class high-voltage power distribution systems.
Product Features
Materials and Manufacturing Process: Produced from premium epoxy resin using the APG automated casting process, the insulators exhibit high density, are void-free, and maintain stable dielectric properties. The metal fittings are firmly bonded to the insulating body, providing outstanding mechanical strength with a bending failure load of ≥7.5 kN, along with excellent impact resistance and aging resistance.
Electrical Performance: Rated voltage of 24 kV, with excellent power-frequency withstand voltage and lightning impulse withstand performance. Insulation resistance (measured with a 2500 V megohmmeter) is no less than 500 MΩ, meeting the requirements of GB 50150 and other applicable industry standards, effectively isolating high voltages and ensuring electrical safety.
Environmental Adaptability: Excellent resistance to contamination and moisture, suitable for demanding indoor environments such as high-dust or high-humidity locations. Capable of sustained operation at elevated temperatures (continuous operating temperature up to 140°C) and low temperatures (minimum operating temperature −40°C), providing a wide operating temperature range.
Ease of Installation: Standardized threaded mounting holes are pre-formed at both ends to accommodate standard high-voltage switchgear installation requirements. The design enables quick adaptation to various switchgear enclosures, reducing installation cost and time.
Maintenance-Free Design: The smooth, dense surface resists contamination buildup and aging. Only periodic cleaning is required during normal service; no additional maintenance measures are needed, resulting in low long-term operating costs.
Core Technical Parameters
| Parameter | Specification |
|---|---|
| Product Model | ZJ-24Q/110×190, ZJ-24Q/110×210, ZJ-24Q/110×225 |
| Rated Voltage | 24 kV |
| Shed Diameter | 110 mm |
| Overall Height | 190 mm, 210 mm, 225 mm |
| Material | Epoxy Resin |
| Mounting Thread Hole Specification | Standard configuration: M16/M10×3 (single hole); certain variants: 3-M10 |
| Operating Temperature Range | −40°C to 140°C |
| Lightning Impulse Withstand Voltage (Peak) | ≥75 kV |
| Bending Failure Load | ≥7.5 kN |
| Insulation Resistance (2500 V Megohmmeter) | ≥500 MΩ |
| Applicable Standards | Per national and industry standards for high-voltage insulators (GB/T 8287, GB 50150) |
Application Scope
Primary Applications: Primarily used in indoor high-voltage metal-enclosed switchgear and controlgear assemblies rated at 24 kV and below, serving as core components in high-voltage switchgear panels, ring main units (RMUs), and gas-insulated switchgear (GIS) enclosures. They are principally used for the mechanical support and insulated fixing of busbars, current-carrying bars, and electrical components.
Compatible Switchgear Types: Widely compatible with mainstream high-voltage switchgear enclosures including KYN2, XGN2, XGN66, and ASGN types, as well as high-voltage distribution panels, distribution boxes, and transformer auxiliary equipment.
Industry Sectors: Applicable across power transmission and distribution, new energy (photovoltaic, wind power), industrial manufacturing, rail transit, chemical processing, metallurgy, and other industries requiring high-voltage power distribution. Suitable for construction and renovation of power distribution systems in indoor substations, distribution rooms, and electrical equipment rooms.
Operating Conditions
Environmental Conditions: For indoor installation only. Operating environment must satisfy: altitude ≤1000 m (high-altitude variants available for ≤4000 m); ambient temperature −40°C to +40°C; relative humidity ≤95% (non-condensing); free from severe contamination, corrosive gases, and flammable or explosive substances.
Installation Conditions: Before installation, verify that the insulator surface is free from damage and cracks, and that the threaded hole specifications match the mounting hardware. During installation, ensure the insulator is mounted vertically with evenly distributed loading; avoid forced twisting or impact to prevent mechanical damage. After installation, perform electrical tests including insulation resistance and power-frequency withstand voltage tests; the insulator shall pass all tests before being placed into service.
Operation and Maintenance: During service, clean dust and surface contamination from the insulator periodically (recommended every 6 months) using a dry, soft cloth; avoid corrosive cleaning agents. Periodically inspect the insulator body and connection points for looseness, damage, or discharge marks; replace immediately upon detection of any anomaly.
Packaging, Transportation, and Storage
Packaging: Packed in moisture-proof, impact-resistant cartons or wooden crates. Each package is labeled with product model, specifications, quantity, date of manufacture, and manufacturer information. Internal cushioning materials such as foam and EPE (expanded polyethylene) padding are used to prevent transit damage.
Transportation: Handle with care during transport; avoid severe jolting and compression. Exposure to rain and moisture is strictly prohibited. Long-distance shipments must be protected against rain, moisture, and impact.
Storage: Store in a dry, well-ventilated warehouse free from corrosive gases. Products must be stored upright and must not be stacked under compression. Storage temperature: −10°C to +40°C. Keep away from ignition sources and heat sources. Products in long-term storage must be inspected periodically to ensure no moisture absorption, deformation, or damage has occurred.
Quality Assurance
All products undergo rigorous factory inspection and comply with relevant national quality standards. ISO 9001 quality management system certification and associated inspection reports are available. Within the warranty period, product quality issues not caused by user misuse will be addressed by the manufacturer through free repair or replacement service, along with technical support and installation guidance.
Appendix: Product Dimensional Drawing
