Dehler
Dehler
Browse our standard and custom products designed for heavy-duty load breaking, power system switching, and isolation.
Modern electrical infrastructure demands safe, touch-proof isolation of circuits during routine maintenance or fault condition checks. An enclosed isolator switch (also known as a switch disconnector in an enclosure) isolates downstream electrical circuits from the power supply, preventing accidental start-ups and potential hazards under load.
Globally, industrial automation, massive solar PV fields, and offshore wind power installations are pushing switchgear requirements to their limits. Enclosures must withstand environmental variables such as intense UV exposure, corrosive ocean salinity, chemical washdowns in food processing plants, and explosive gases in mines. As a result, procurement engineers are steering away from generic products and aggressively sourcing custom enclosed isolator switches that fit exact environmental and electrical load parameters.
Sourcing departments analyze the total cost of ownership (TCO) of electrical isolation units. Crucial points of evaluation include:
Customization requires deep familiarity with mechanical designs, thermodynamics, and electrical conductivity metrics. Below are key engineering characteristics critical to isolator configurations.
Depending on the operating zone, enclosures are manufactured from polycarbonate (impact-resistant and UV stabilized), glass-fiber reinforced polyester (GRP for high mechanical stability), or marine-grade 316 stainless steel for chemical and offshore installations.
Our custom isolators utilize copper alloy contacts coated with silver/nickel plating to guarantee low contact resistance and prevent thermal degradation. In medium and high-voltage applications, specialized SF6 or vacuum arc-quenching chambers are implemented.
Products must strictly adhere to internationally recognized design codes including IEC/EN 60947-3 (for low voltage switchgear and disconnectors), UL 508 (industrial control equipment), and GB/T 14048.3.
| Technical Parameters | Standard Range | Custom Configurations Available |
|---|---|---|
| Rated Operational Voltage (Ue) | 230V - 1000V AC / 1500V DC | Up to 40.5kV for Medium/High Voltage Systems |
| Rated Current (Ie) | 16A - 1250A | High-capacity systems up to 3150A |
| Ingress Protection (IP) | IP65, IP66 | IP67, IP68, NEMA 4/4X Corrosion Resistant |
| Operating Temperature | -25°C to +60°C | Extreme environment setups (-40°C to +85°C) |
Established in 2016, Dehler Technology Co., Ltd. is positioned at the forefront of China's high and low voltage power equipment manufacturing sector. Our headquarters are located at No. 271, Weishiqi Road, Yanpan Economic Development Zone, Yueqing City. To bolster our industrial capability, our dedicated electrical complete equipment transformer division is situated at No. 178, Jingba Road, Economic Development Zone.
We are a high-technology enterprise seamlessly integrating research and development, high-precision production, global sales, and engineering support services. We specialize in producing complete sets of high & low voltage switchgear, prefabricated substations, cable branch cabinets, indoor & outdoor vacuum circuit breakers, disconnectors, earthing switches, load switches, and various critical electrical components.
Over the years, Dehler has diversified its industrial portfolio, continuously upgrading production methodologies and engineering services. We have built a robust reputation by nurturing long-term, stable partnerships with global raw material suppliers and distributors.
We leverage a systematic and highly standardized quality management system as a strong foundation to advance our design and deployment capabilities. By adhering strictly to national and international quality standards, we reinforce our global footprint and ensure every custom enclosed isolator switch meets the highest levels of reliability under load stresses.
"Survival through quality, development through technology, and efficiency through management." This core business philosophy drives us to address current challenges and pre-engineer solutions for the future of power systems.
“High-quality products, superior technology, and impeccable service” are the non-negotiable targets pursued by the team at Dehler.
Facing the rapid changes and high demands of international industrial electrical development, we have implemented a comprehensive development strategy, optimizing our custom design cycle and establishing a highly scalable production model. This allows us to supply both high-volume standardized components and highly specialized, low-volume custom enclosed switches.
In this dynamic new environment, we continuously innovate our management tools, expand our branding footprint, accelerate cross-department resource integration, and participate aggressively in competitive global markets to deliver value to our clients.
Custom enclosed isolator switches are the unsung heroes of safety and reliable operations across various critical global industries.
PV arrays generate high-voltage DC electricity. Specialized DC-PV2 enclosed isolator switches are critical to securely isolate high-voltage inverter banks, protecting maintenance staff from persistent arc-flash hazards.
Dust, mechanical shock, and moisture are constant threats. Custom explosion-proof or heavy-duty GRP isolators ensure circuit isolation for crushers, conveyors, and extraction equipment without risk of switch degradation.
Electrification networks require rapid, highly stable disconnectors. Dehler's specialized HV switches operate under intense vibration environments and deliver long, maintenance-free life-cycles.
As electrical grids transition into smart grids, the humble isolator switch is undergoing a major evolution. Traditional isolators are moving towards digitisation and sensory intelligence.
Integrated Telemetry: Future isolator switches are equipped with micro-sensors that measure contact temperature and humidity levels inside the enclosure. By routing this data through Modbus or wireless IoT channels, facilities can run predictive maintenance, reducing costly unscheduled outages.
Arc Mitigation & Eco-Friendly Design: R&D is heavily focused on replacing SF6 gases with clean air mixtures and vacuum insulation modules to reduce environmental footprint without compromising dielectric capabilities.
We are investing in smart monitoring modules for high-voltage earthing switches and switchgear assemblies. This ensures our switchboards seamlessly integrate with SCADA and industrial automation architectures.
Dehler cooperates with major electrical contractors, components companies, and industrial distributors around the globe.
Get expert answers to technical and commercial questions about custom enclosed isolator switches and power systems.
An isolator switch is designed to isolate a circuit exclusively when no current is running through it (off-load isolation). A load break switch, on the other hand, is specifically constructed to make, carry, and break currents under normal circuit operational conditions, including specified overload currents.
Marine settings expose switches to chlorides that induce pitting and crevice corrosion. Employing standard polycarbonate may result in UV degradation, while basic steel quickly rusts. 316-grade Stainless Steel or specifically engineered glass-reinforced polyesters (GRP) prevent environmental ingress and premature mechanical failure.
Yes. We specialize in engineering custom enclosures to meet unique dimensional limitations, mounting requirements, and pre-drilled cable entry layouts. This minimizes installation time and guarantees compatibility with existing industrial configurations.
Our custom switch designs incorporate lockout/tagout (LOTO) options accommodating up to three padlocks, door interlocks that prevent opening the enclosure when the switch is in the "ON" state, and auxiliary contact loops to signal PLC/SCADA control centers of switch positioning.
Explore additional industrial component solutions manufactured at our modern facility.
Key components engineered for high-voltage switchgear installations.
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Critical conductive components in the circuit breaker breaker system.
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Core contact components indispensable for switchboard structures.
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Special insulating components designed to resist electrical leakage.
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Robust, high-reliability low-voltage electrical cabinet system.
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Enhancing reactive power compensation and voltage profile stability.
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Ideal for power plants, substations, and industrial consumers.
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Advanced drawout design for quick maintenance and operations.
Learn MoreFull lifecycle products from engineering and production to final testing and deployment.
Based in China with a global perspective, Dehler sincerely collaborates with engineers, project managers, and distributors to build sustainable electrical safety architectures.
Whether you require standard enclosed isolator switches or complex custom distribution cabinets, our engineering department will formulate layouts to match your technical drawings.
No. 271, Weishiqi Road, Yanpan Economic Development Zone,
Yueqing City, Zhejiang Province, China
