Enhancing Electrical Network Safety and Continuity with VOLTAK's Neutral Earthing Solutions

VOLTAK, as a leading supplier in the electrical industry, presents advanced Neutral Earthing Resistor (NER) systems, crucial for managing fault currents and enhancing safety in AC distribution networks. These systems, also known as Neutral Grounding Resistors, are instrumental in limiting transient overvoltages during fault events, thereby protecting both equipment and personnel.

What is a Neutral Earthing Resistor (NER)?

Neutral Earthing Resistors (NERs), also known as Neutral Grounding Resistors, are critical components in AC distribution networks. They serve to limit transient overvoltages and fault currents during a fault event, ensuring the safety of both equipment and personnel. NERs are typically connected between the ground and the neutral of transformers, effectively reducing fault currents to a pre-determined safe value. This allows for the activation of protection devices to locate and clear faults without necessitating a network shutdown or causing damage to equipment.

NERs are designed to absorb and dissipate significant energy during a fault event, adhering to temperature limitations specified in IEEE32 standards. The careful selection and design of NERs are vital for ensuring the safety of equipment and personnel, as well as maintaining continuity of supply.

Key Applications of VOLTAK's NER Systems:

• Power generation sectors, including thermal, nuclear, and renewable energy sources.
• Critical infrastructure like hospitals, data centers, and industrial plants.

Technical Specifications and Standards:

• Compliance with IEEE-C57.32 and IEC 60529 standards.
• Nominal voltage capabilities up to 110/√3 kV.
• Fault current handling up to 5000 A, with durations tailored to customer needs.
• Resilient stainless steel elements and a variety of resistor types.

Advantages of VOLTAK's NER Solutions:

• Robust design, offering easy access and maintenance.
• High insulation and mechanical resistance, suitable for challenging environments.
• Customizable enclosure protection degrees and materials.
• Comprehensive accessory options, including transformers, switches, and surge arresters.

High Resistance Neutral Grounding Systems:

VOLTAK's High Resistance Neutral Grounding Systems (HRG) are designed for applications where uninterrupted energy supply is critical. These systems effectively limit short-circuit fault current and facilitate fault detection.

Generator Neutral & Leads Cubicle:
These specialized cubicles combine three phases from generators, providing a safe and efficient neutral grounding solution. They're equipped with internal current transformers for fault detection, ensuring maximum safety and operational efficiency.

VOLTAK's commitment to safety and reliability is evident in the meticulous design and comprehensive range of their Neutral Earthing Resistor systems. By choosing VOLTAK, network operators and end users benefit from reduced equipment damage, enhanced safety, and improved network resilience.