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Help CenterGW4-40.5 Outdoor High Voltage Isolator With Earth Blade 1250A Manual
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Jinhua Dika Electrical Equipment Co., Ltd., a professional manufacturer based in Jinhua, Zhejiang, China, presents the GW4-40.5 Outdoor High Voltage Isolator with Earth Blade 1250A Manual. This disconnector is engineered to ensure reliable isolation and grounding of high-voltage circuits in outdoor substations and power distribution systems. With a robust design and manual operation, it offers a cost-effective solution for safe maintenance and switching operations. Backed by decades of manufacturing expertise and a broad export portfolio spanning over 15 global regions, our isolator meets rigorous international standards and is trusted by utility companies worldwide.
The GW4-40.5 series is specifically designed for 40.5 kV rated voltage and 1250 A rated current, making it ideal for medium-voltage power networks. The integrated earth blade provides an additional safety layer by allowing visible earthing during line disconnection, preventing accidental energization. Our manual operating mechanism ensures simple, reliable actuation even in harsh outdoor environments, requiring minimal maintenance. Each unit undergoes strict quality control procedures to guarantee long service life and consistent performance.
Key features of the GW4-40.5 Outdoor High Voltage Isolator with Earth Blade 1250A Manual include:
- Robust Construction: High-strength aluminum alloy or galvanized steel base frame resists corrosion and mechanical stress; silicone rubber or porcelain insulators provide excellent creepage distance.
- Reliable Interlocking: Mechanical interlock prevents incorrect operation sequence between main switch and earth blade, ensuring operator safety.
- Easy Installation: Compact footprint and modular design allow quick mounting on steel structures; suitable for both new projects and retrofits.
- Low Maintenance: Self-lubricating bearings and sealed operating box reduce routine service intervals; all moving parts are treated for long-term outdoor use.
- Visible Break: Clear opening gap provides visible isolation confirmation, complying with safety regulations for work on de-energized lines.
Technical specifications are summarized in the table below:
| Parameter | Value |
| Rated Voltage (kV) | 40.5 |
| Rated Current (A) | 1250 |
| Rated Short-Time Withstand Current (kA/4s) | 31.5 |
| Rated Peak Withstand Current (kA) | 80 |
| Insulator Type | Porcelain / Silicone Rubber (customizable) |
| Operating Mechanism | Manual (hand crank or lever) |
| Creepage Distance (mm) | ≥1050 (anti-pollution level optional) |
| Weight (approx., kg) | 120–180 depending on configuration |
The GW4-40.5 is suitable for a wide range of applications including:
- Outdoor substations (HV/MV distribution)
- Switchyards and transformer bays
- Industrial power plants and mining operations
- Renewable energy substations (solar, wind)
- Railway electrification networks
Our product offers distinct advantages to customers:
- Safety First: The earth blade ensures a secure grounding path, drastically reducing risk of electric shock during maintenance. Visual isolation eliminates ambiguity.
- Durability in Extreme Conditions: Designed to operate in ambient temperatures from -30°C to +50°C, with optional anti-frost and anti-salt fog coatings for coastal or cold regions.
- Customization Flexibility: Poles, base frame dimensions, terminal connectors, and operating accessories can be tailored to match your specific grid requirements.
- Cost-Effective Operation: Manual mechanism eliminates need for auxiliary power supply; low spare parts cost due to standardized components.
Jinhua Dika Electrical Equipment Co., Ltd. is a reliable partner with an annual export value of USD$1 million to USD$1.5 million and a dedicated team of 11–50 skilled professionals. Our manufacturing facility is certified under ISO9001, ISO14000, OHSAS18001, and other management systems (including TL900, SA8000, and TS16969 upon request), reflecting our commitment to quality, environmental responsibility, and occupational health. We ship through major ports: Shanghai, Tianjin, Guangzhou, and Ningbo, ensuring efficient global logistics. Our products have been successfully deployed in markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. With a strong domestic market presence and a proven track record, we invite you to experience the reliability of our outdoor isolators. Contact our sales team for a quote or technical consultation—let us help you energize your network safely.
Frequently Asked Questions (FAQ)
-
Q: What is the main function of the earth blade on this isolator?
A: The earth blade provides a visible grounding path when the main switch is open. It safely discharges any residual voltage or induced current, protecting personnel working on the line. -
Q: Can the GW4-40.5 be operated under load?
A: No. This is a disconnector designed to isolate circuits only after the load current has been interrupted by a breaker. Operating it under load may cause arcing and damage. -
Q: What type of insulator material is used?
A: Standard units use porcelain insulators with high creepage distance. Silicone rubber insulators are available as an option for improved pollution performance and lighter weight. -
Q: Is the manual mechanism easy to operate in cold weather?
A: Yes. The mechanism is designed with low-friction bearings and can be fitted with anti-icing grease. For extreme cold, a heated box is available upon request. -
Q: What certifications does Jinhua Dika hold for this product?
A: The company holds ISO9001, ISO14000, OHSAS18001, and other management system certifications. Product type tests conform to relevant IEC/GB standards. Specific certificates can be provided upon request. -
Q: Can the isolator be integrated with remote monitoring?
A: While this model is manual, our custom solutions can include auxiliary contacts for position indication. For full remote operation, please inquire about motorized versions. -
Q: What is the typical lead time?
A: Standard configurations have a lead time of 3-5 weeks after order confirmation. Customized orders may require 6-8 weeks depending on complexity. -
Q: Do you provide installation and commissioning support?
A: Yes, detailed installation manuals are included. On-site technical support can be arranged for large projects or upon request (travel expenses apply).
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