Contact Platform Support
Help Center24kV Motorized Grounding Switch for Power Plant Safety Systems
Product Spotlights
Related Products
-
126kV GW4 Outdoor Isolator 630A Copper-Aluminum Contacts IEC CompliantUS$ 300MOQ: 1 Unit -
Disconnecting Switch GW4 40.5kV Outdoor High Voltage Isolator 1250A 3000 Mechanical CyclesUS$ 300MOQ: 1 Unit
-
GW4 Type Outdoor HV Disconnecting Switch 72.5kV 2000A Electric Motor OperatorUS$ 300MOQ: 1 Unit
-
GW4-40.5 Outdoor High Voltage Isolator With Earth Blade 1250A ManualUS$ 300MOQ: 1 Unit
-
252kV GW4 Disconnecting Switch 2500A Self-Cleaning Contacts Spring OperatingUS$ 300MOQ: 1 Unit
As a specialized manufacturer with over a decade of experience in electrical safety equipment, Jinhua Dika Electrical Equipment Co., Ltd. is proud to present our 24kV Motorized Grounding Switch, engineered specifically for the rigorous demands of modern power plant safety systems. Our commitment to precision engineering and stringent quality control, reflected in our adherence to multiple international management standards, ensures that every switch we produce offers reliable, fail-safe grounding to protect personnel and high-value equipment from hazardous voltages during maintenance and fault conditions. This product represents a critical component in creating a safer working environment, combining robust construction with advanced motorized operation for seamless integration into automated safety protocols.
The core function of this grounding switch is to provide a visible, secure earth connection for isolated sections of a 24kV electrical circuit. This is not a simple disconnect device; it is a safety interlock mechanism. Its motorized actuator allows for remote operation from control rooms or integration with Supervisory Control and Data Acquisition (SCADA) systems, eliminating the need for manual, potentially hazardous, switching at the equipment location. This feature is crucial for large-scale power plants where switchgear may be located in hard-to-access or dangerous areas.
Key Design Features & Technical Advantages:
- Motorized Actuator with Feedback: Equipped with a high-torque, reliable motor drive system that ensures positive switching action. The actuator includes position indication contacts (open/close/earth) that provide clear feedback to the control system, confirming the switch's status and enhancing safety interlocks.
- Robust Contact System: Features silver-plated or copper alloy main contacts with high short-time withstand current (Ik) rating. The design ensures low contact resistance for effective grounding and minimizes heating during fault current conduction.
- Mechanical & Electrical Interlocking: Can be supplied with integrated interlocking mechanisms to prevent incorrect operation sequences, such as closing the grounding switch while the main circuit breaker is closed. This is a fundamental safety feature to prevent catastrophic errors.
- Durable Enclosure & Insulation: The switch is housed in a corrosion-resistant enclosure (options include painted steel or stainless steel) suitable for the environmental conditions found in power plants. High-grade insulation materials are used for bushings and barriers to maintain dielectric integrity at 24kV.
- Flexible Control Options: Supports various control voltages (e.g., 24VDC, 48VDC, 110VAC, 220VAC) to match your plant's auxiliary supply. Local manual operation capability (via a crank or lever) is typically provided as a backup for maintenance or emergency use.
- Enhanced Safety Visibility: Often includes a clearly visible "earthing" position indicator, sometimes with a bright colored target, providing a visual confirmation of the grounded state to personnel on-site.
Primary Technical Specifications:
| Parameter | Specification / Value |
| Rated Voltage (Ur) | 24 kV |
| Rated Frequency | 50/60 Hz |
| Rated Short-Time Withstand Current (Ik) | 25 kA / 31.5 kA / 40 kA (selectable) |
| Short-Time Duration | 3 seconds |
| Rated Peak Withstand Current (Ip) | Corresponding to Ik rating |
| Operating Mechanism | Spring-assisted motorized actuator |
| Control Voltage | DC 24/48/110V or AC 110/220V (customizable) |
| Operating Time (Close/Open) | Typically 3-6 seconds |
| Mechanical Life | ≥ 10,000 operations |
| Degree of Protection (Enclosure) | IP4X (standard), higher ratings available |
| Ambient Temperature Range | -25°C to +40°C (operational) |
Direct Benefits for Power Plant Operators:
- Personnel Safety Assurance: Creates a verified safe-to-work zone by securely grounding circuit sections, drastically reducing the risk of electrical shock to maintenance crews.
- Operational Efficiency: Remote operation capability saves time and labor. Switching commands can be executed from a central control room, streamlining maintenance scheduling and switching procedures.
- Asset Protection: Provides a safe discharge path for induced or trapped charges, protecting transformers, cables, and other expensive equipment from damaging overvoltages during work.
- Process Integration & Compliance: The motorized operation and feedback signals allow for easy integration into computerized safety and maintenance management systems, helping to enforce proper Lock-Out/Tag-Out (LOTO) procedures and meet regulatory safety standards.
- Reduced Operational Risk: The inherent reliability and interlocking features minimize human error during complex switching sequences, contributing to overall plant reliability and safety culture.
FAQ (Frequently Asked Questions)
-
Q: What is the main difference between a motorized grounding switch and a manual one?
A: A motorized switch can be operated remotely via electrical signal, allowing integration into control systems for safer, faster switching without personnel being physically present at the switch location. Manual switches require an operator to be on-site. -
Q: Can this switch be integrated with our existing SCADA or plant DCS?
A: Yes, typically. The switch provides dry contact feedback signals for "Open," "Closed," and "Earthed" positions, and accepts standard control voltages. Interface requirements should be specified during ordering for seamless integration. -
Q: What short-circuit current rating should I choose (25kA, 31.5kA, etc.)?
A: This depends on the fault level (short-circuit capacity) of your specific 24kV busbar or circuit. You must select a rating equal to or greater than the maximum prospective fault current at the installation point, as calculated by your system studies. -
Q: Is local manual operation possible if the motor or control power fails?
A: Most designs include a manual operating mechanism (e.g., a socket for a crank handle) as a backup. This allows personnel to manually open, close, or earth the switch for maintenance or in an emergency when motor power is unavailable. -
Q: What type of interlocking is available to prevent unsafe operation?
A: Mechanical interlocking with the associated circuit breaker or isolator is common, preventing the grounding switch from closing unless the main breaker is open and isolated. Electrical interlocking via auxiliary contacts is also used for control system logic. -
Q: What is the typical delivery lead time for a custom-configured unit?
A: Lead times vary based on configuration complexity and order volume. Standard configurations may have shorter lead times. Please contact us with your specific requirements for an accurate production schedule. -
Q: Are these switches suitable for outdoor substation installation?
A: Yes, with appropriate specifications. You would need to specify an outdoor-rated enclosure (e.g., with higher IP protection like IP54 or IP65) and consider materials suited for your local environmental conditions (corrosion, pollution, temperature extremes). -
Q: Do you provide technical support for installation and commissioning?
A: We provide detailed installation manuals, wiring diagrams, and technical data sheets. For complex projects, on-site support or commissioning guidance can be discussed and arranged based on project needs.
Trust in a product backed by a manufacturer with a proven global footprint, serving markets from North America and Western Europe to Southeast Asia and Africa. Jinhua Dika's operational framework, guided by a suite of recognized management standards including ISO 9001 for quality and OHSAS 18001 for occupational health and safety, is intrinsically linked to the reliability of this 24kV Motorized Grounding Switch. Our capability to ship from major Chinese ports like Shanghai, Tianjin, Guangzhou, and Ningbo ensures efficient logistics for your project timelines. Choose a safety component that delivers more than just a connection—it delivers confidence, operational control, and a tangible commitment to protecting your most valuable assets: your people and your power generation infrastructure. Contact us today to discuss your specific application and receive detailed technical documentation.
Send Inquiry to This Supplier
You May Also Like
-
GW4-126 Double Column Horizontal Rotary Disconnector 2000A High AltitudeUS$ 300MOQ: 1 Unit
-
33kV 35kV Drop Out Fuse 100A 200A IEC Standard Outdoor InstallationUS$ 180MOQ: 3 Units
-
100A 200A High Voltage Fuse Switch 33kV 35kV With Zinc Oxide ArresterUS$ 180MOQ: 3 Units
-
33kV 35kV Drop Out Fuse 100A 200A With Galvanized Steel BaseUS$ 180MOQ: 3 Units
-
100A 200A High Voltage Fuse Switch 33kV 35kV Compliant With IEC 60282-1US$ 180MOQ: 3 Units
-
100A 200A High Voltage Fuse Switch 33kV 35kV With Mill Test ReportUS$ 180MOQ: 3 Units
-
100A 200A High Voltage Fuse Switch for Overhead Power Line ProtectionUS$ 180MOQ: 3 Units
-
33kV 35kV Drop Out Fuse 100A 200A With 10-Year WarrantyUS$ 180MOQ: 3 Units
-
100A 200A High Voltage Fuse Switch 33kV 35kV for Transformer ProtectionUS$ 180MOQ: 3 Units
-
33kV 35kV Drop Out Fuse 100A 200A for Rural Electrification ProjectsUS$ 180MOQ: 3 Units
