Neutral Grounding Resistor
Performance characteristics: This series of products is made of imported stainless steel alloy resistance elements from abroad, with low temperature rise coefficient, small resistance change rate, high stability performance, bolt connection, easy disassembly, reliable connection, can be matched with intelligent monitoring devices, can effectively monitor grounding fault current and voltage, and provide switch values and alarm contacts.
Product application:
A neutral point grounding resistor is a current limiting electrical protection device connected between the neutral point of a generator or transformer and the ground. When a fault occurs in the power grid, the neutral point voltage of the power supply will be offset, especially in cable powered power grid systems. When the capacitance current to ground is large, arc grounding overvoltage will be generated when the current is greater than the specified value, which greatly increases the ground voltage of the non fault phase and causes insulation damage to the equipment, resulting in two-point or multi-point grounding short circuit and power outage accidents. The purpose of using neutral point resistance grounding method is to inject resistive current into the fault point, making the grounding fault current have resistance capacitance properties, reducing the phase difference with voltage, lowering the reignition rate of the fault point current after zero crossing and arc extinguishing, limiting the overvoltage within a certain level, improving the sensitivity of relay protection equipment to achieve tripping, rapid search for fault lines and backup switching, and effectively protecting the normal operation of the system.
Neutral point grounding resistance is widely used in transformer secondary and generator stator side neutral points. After connecting a resistor in series with the neutral point of the equipment (or using a grounding transformer to lead out the neutral point), intermittent arc overvoltage electromagnetic energy is discharged, and the neutral point potential decreases. Therefore, the speed of fault recovery voltage rise also slows down, thereby reducing the possibility of arc reignition, suppressing the amplitude of grid overvoltage, and enabling selective grounding protection.
Product Features:
Technical Features:
Optional Accessories:
Application Environment:
Ambient air temperature: +40°C— -15°C
Altitude: 1000m, 3000m
Minimum rated creepage distance: ceramic material not less than 18mm/kV
Organic material not less than 20mm/kV
Ambient air temperature: +40°C— -35°C
Altitude: 1000m, 3000m
Minimum rated creepage distance: Level II: 20mm/kV, Level III: 25mm/kV, Level IV: 31mm/kV
Note: When normal usage conditions are exceeded, it shall be determined through consultation between the user and the manufacturer.
Ordering Notice:
We are willing to serve you with our professionalism, sincerity, and integrity.
Comprehensive Ground Fault Protection
ZHIYOU Neutral Grounding Resistors are engineered to limit transient fault currents in grounded systems, reducing arc flash hazards and equipment damage. Widely used in Transformer Neutral Grounding Resistor and Generator Neutral Grounding Resistor applications, they ensure network safety and operational continuity.
Broad Product Compatibility and Application Range
Our resistors serve multiple functions including Filter Resistor, Damping Resistor, Load Resistor, Braking Resistor, and Starting Resistor, making them adaptable to motor starting systems, generator testing, and harmonic filtering. They also integrate into Grounding Protection Devices, Neutral Grounding Resistor Enclosures, and Load Banks for comprehensive system coverage.
High-End Materials and Long-Term Stability
Each unit is crafted with precision-welded stainless steel alloy grids that maintain consistent resistance across temperature fluctuations. This ensures low deviation rates and secures long-term durability in electrical equipment grounding environments.
Customizable Designs for Global Projects
Available in low to ultra-high voltage filter resistor configurations, ZHIYOU provides flexible solutions ranging from 0.005Ω to 11.7Ω in resistance and up to 8.3kV in voltage ratings. Whether you need an indoor panel or a High Voltage Grounding Resistor Cabinet, our products are tailored to meet diverse global standards.
About Us
Shanghai Zhiyou Electric Manufacturing Co., Ltd. is a leading manufacturer of power transformers, reactors, resistors, and complete electrical equipment, serving a diverse range of industries worldwide.
Core Manufacturing Capabilities and Quality Assurance
Production Strength
Global Reach: Our products are exported to 86 countries and regions, including North America, South America, Europe, Southeast Asia, the Middle East, and Africa.
Sustainability Initiatives
Environmental Commitment: We adhere to ISO 14001 environmental management standards, reflecting our dedication to sustainable manufacturing practices.
Customer Collaboration Process
Global Service Capability
Headquartered in Shanghai, China's economic hub, we leverage our strategic location to deliver efficient and reliable services to clients worldwide. Our international certifications and extensive export experience underscore our commitment to global standards and customer satisfaction.
Partner with Shanghai Zhiyou Electric Manufacturing Co., Ltd. to experience excellence in electrical solutions tailored to your needs.
Frequently Asked Questions (FAQ)
Who are we?
We are Shanghai Zhiyou Electric Manufacturing Co., Ltd., a factory established in 2007, specializing in the production of power transformers, reactors, resistors, and complete electrical equipment. Our factory is located in Shanghai, China.
How can we guarantee quality?
We have obtained ISO 9001 international quality management system certification and ISO 14001 international environmental management system certification. All products undergo testing and certification by authorized institutions, ensuring compliance with or exceeding national and international standards.
What can you buy from us?
Our product range includes:
Why should you buy from us and not from other suppliers?
With over 18 years of manufacturing and R&D experience, we offer high-quality products at competitive prices. Our products have been exported to 86 countries and regions, and we have established a reputation for reliability and excellence.
What services can we provide?
We offer comprehensive services, including:
