Intermediate and station arresters protect medium and high-voltage electrical systems by diverting voltage surges from lightning strikes, switching operations, or equipment malfunctions to ground. Station arresters handle heavy-duty applications with higher energy absorption (up to 6.1 kJ/kV), lower discharge voltages, and fault withstand capacity of 80 kA rms symmetrical, making them suitable for large substations. Intermediate arresters provide moderate protection (up to 5.0 kJ/kV energy capability and 50 kA fault withstand) for small substations, underground cable networks, and dry-type transformers.
These arresters use metal oxide valve elements, primarily zinc oxide discs, enclosed in polymer or porcelain housings with fiberglass-reinforced epoxy and silicone rubber seals. The zinc oxide discs exhibit high impedance under normal voltages, allowing minimal leakage current. During surges, resistance drops rapidly to conduct excess current to ground, then returns to high-impedance state for continuous operation.
Maximum Continuous Operating Voltage (MCOV) ranges from 2.55 kV to 158 kV for station types and 2.55 kV to 115 kV for intermediate types. Duty cycle ratings span 3 kV to 198 kV for station and 3 kV to 144 kV for intermediate arresters. Designs comply with Institute of Electrical and Electronics Engineers (IEEE) Std C62.11 and International Electrotechnical Commission (IEC) 60099-4 standards, with hollow core configurations for directional venting and increased creepage distance for polluted environments.
Applications include generation, transmission, and distribution substations, Alternating Current (AC) and Direct Current (DC) traction systems, High Voltage Direct Current (HVDC) networks, and series capacitor banks. Selection requires matching MCOV to system line-to-ground voltages and grounding practices per IEEE C62.22, with system fault levels exceeding 20 kA typically necessitating intermediate or station class protection.
Authoritative Wholesaler of High-Quality Intermediate and Station Arresters
RaxPower, established in 2003, has over 21 years of expertise in manufacturing high-quality power hardware, including Intermediate and Station Arresters. Our commitment to innovation, reliability, and service is driven by decades of experience and a customer-focused approach. Trust your lines, substations, and reputation to RaxPower’s arresters for dependable surge protection against lightning, switching, and equipment failures.
Our arresters benefit from the following key features:
- Advanced manufacturing processes like hot forging, which ensures greater strength and precise sizing for enhanced durability
- Strict quality control with raw material selection and multi-stage testing, including load and gauge tests per IEC standards, guaranteeing 100% quality
- Automation and sophisticated technology for uniform production and on-time delivery, supported by a team of professional engineers and technicians
- Compliance with international standards, validated through SGS tests and authoritative research institutes
With a focus on continuous improvement, we leverage our robust production capabilities—spanning 17,000 square meters of workshops—to deliver arresters that meet your specific system requirements. For expert consultation on selection and application, contact RaxPower.
| Parameter | Intermediate Class | Station Class |
|---|---|---|
| Standards Compliance | IEEE C62.11, IEC 60099-4 | IEEE C62.11, IEC 60099-4 |
| MCOV Range (kV) | 2.55 – 115 | 2.55 – 158 |
| Duty Cycle Rating Range (kV) | 3 – 144 | 3 – 198 |
| Nominal Discharge Current (kA) | 10 | 10 |
| Energy Capability (kJ/kV) | 5.0 | 6.1 |
| Fault Withstand Capability (kA rms sym) | 50 | 80 |
| Pressure Relief Capability (kA) | 40 | 63 |
| Cantilever Bending Strength (in-lbs) | 4,000 | 10,000 |
| Minimum Mounting Spacing – Phase to Ground (in at sea level) | 6.2 | Varies by model |
| Minimum Mounting Spacing – Phase to Phase (in at sea level) | 7.6 | Varies by model |
| Maximum Operating Altitude (ft) | 12,000 | 12,000 |
Frequently Asked Questions (FAQS)
What are intermediate and station arresters, and how do they differ in performance?
Intermediate and station arresters are devices that safeguard medium and high-voltage electrical systems from power surges and lightning strikes. Station arresters offer higher energy absorption (6.1 kJ/kV with duty cycle ratings from 3 kV to 198 kV), lower discharge voltages, and robust pressure relief, making them ideal for large substations and sites with intense surges. Intermediate arresters provide lower protection and energy discharge capacity, suitable for underground cable protection, small substations, and dry-type transformers. RaxPower's arresters use metal oxide valve elements with fiberglass winding and feature UltraSIL silicone rubber housing for superior insulation performance.
In which sectors are these arresters commonly used?
RaxPower arresters are applied in the electric power sector to protect distribution and transmission systems from overvoltages, and in the transportation sector (including AC and DC traction systems for railway electrification) to safeguard transit and rail systems against voltage fluctuations, constant vibration, and harsh weather conditions.
What are the key design features of RaxPower arresters?
Key features include moisture-impervious wrap, UltraSIL silicone rubber housing for superior insulation and resistance to environmental stresses, hollow core design for enhanced directional venting and cantilever strength, availability with additional creepage for extreme atmospheric pollution conditions, and the ability to withstand short-duration currents of 100 kA crest. Mounting options include small top/tripod base configurations with slotted bolt circles for secure installation.
What international standards do RaxPower arresters meet?
RaxPower arresters are designed and tested to meet IEEE Std C62.11 and IEC 60099-4 standards, ensuring compliance with industry performance and safety guidelines for reliable overvoltage protection of critical grid infrastructure and railway systems.
What makes RaxPower arresters a cost-effective choice for OEM clients and large EPC projects?
Our arresters undergo multi-stage testing, including load tests, ensuring perfectly consistent quality and performance. This results in significant cost savings compared to in-house production while protecting your brand. For large-volume orders, we offer a comprehensive range with duty cycle ratings from 3 kV to 198 kV, covering applications below 35 kV, between 35-110 kV, and above 110 kV. Our automated manufacturing and efficient warehousing enable us to handle bulk orders and ensure on-time delivery for major infrastructure projects.
Get A Quick Quotation Today
