Outdoor Auto Circuit vacuum recloser/reclosure Direct Supply-38kV
Key attributes
| Brand | ROCKWILL |
| Model NO. | Outdoor Auto Circuit vacuum recloser/reclosure Direct Supply-38kV |
| Rated voltage | 38kV |
| Rated normal current | 400A |
| Rated short circuit breaking current | 12.5kA |
| Power frequency withstand voltage | 90kV/min |
| Rated lightning impulse voltage | 195kV |
| manual closing | Yes |
| Mechanical lock | No |
| Series | RCW |
Description
Pioneer of China’s recloser track and the first specialized source manufacturer — that’s who we are after decades of focused efforts. We’ve strengthened our foundation via tech breakthroughs, guided the industry through standard-setting, and built a fully independent full-chain system from core R&D to mass production and delivery.
The RCW series automatic circuit reclosers are designed for use on overhead distribution lines and distribution substation applications at a voltage class of 38kV, 50/60Hz power systems, with a rated current up to 1250A. They integrate control, protection, measurement, communication, fault detection, and online monitoring of closing/opening operations. The RCW series vacuum recloser is mainly composed of an integrated terminal, current transformer, permanent magnetic actuator, and its recloser controller.
RCW automatic circuit reclosers Magnetic actuator
Product Showcase Video
Features
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Full-Vacuum Arc Extinguishing System：Utilizes longitudinal magnetic field vacuum interrupters and epoxy-cast poles, with a short-circuit breaking capacity of 16kA/25 cycles and a mechanical lifespan exceeding 10,000 operations, suitable for frequent switching scenarios.
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Integrated Intelligent Control Platform：Equipped with FTU and edge computing modules, supports GOOSE communication, fault waveform recording, and seamless SCADA system integration, enabling remote iterative updates of protection logic via cloud platforms.
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Industrial-Grade Environmental Endurance Design：Features an IP67-rated enclosure, operates across a wide temperature range (-45℃ to +70℃), and is validated for both salt spray corrosion (Kesternich 1440h) and seismic resistance (intensity 8).
Parameters
|
Rated maximum voltage |
38kV |
|
Rated maximum current |
1250A |
|
Rated frequency |
50Hz |
|
Rated short circuit breaking current |
12.5kA |
|
Rated peak value withstand current |
31.5kA |
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Rated 1min power frequency withstand voltage (Three-phase Epoxy resin pole) |
90kV |
|
Rated lightning impulse voltage (Three-phase Epoxy resin pole) |
195kV |
|
Operation sequence |
C-0.5-CO-2-CO-5-CO (Magnetic actuator) |
|
Mechanical life |
n:30000 (Magnetic actuator) |
|
Power supply and operating voltage |
110/220V (Customized) |
|
Ratio of current transformer |
400/1A (Customized) |
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Number of voltage sensors (Three-phase Epoxy resin pole) |
≤6 |
|
Opening time |
≤30ms (Magnetic actuator) |
|
Closing time |
≤40ms (Magnetic actuator) |
|
Minimum creepage distance |
31, level4 (mm/kV) |
|
Minimum distance between phases |
360mm |
|
Potential transformer |
110/220V (Customized) |
|
Cable length |
6,8,12m (Customized) |
|
Cable clamp (Three-phase Epoxy resin pole) |
4-hole NEMA |
|
Lightning arrester |
≤6 |
|
Mounting type |
Single / double column |
Note：This Outdoor Auto Circuit vacuum recloser/reclosure is available in multiple configurations for 38kV distribution projects. As a High Voltage Recloser Manufacturer, we support customization of rated current, short-circuit breaking current, CT ratio, operation mode, and operating voltage.
The Pole Mounted Recloser design also supports Outdoor Recloser/Reclosure OEM/ODM China services. Please specify the required parameters when ordering.
Recloser Controller Panel
The controller panel integrates relay protection, communication protocols, measurement functions, reclosing interval settings, and event recording. As a Smart Recloser China Manufacturer, we support customized protection logic and communication options for different distribution automation projects.
Optional relay protection & logics for user choice
- Instantaneous over-current protection
- Timing over-current protection
- Negative sequence over-current protection
- Directional over-current protection(⁽¹⁾)
- Over-voltage protection / Under voltage protection
- Programmable protection relay curves (total 10 nos ANSI/IEC curves)
- Cold load pickup protection TCC + Hot line tag
- Earth protection E/F SEF + Zone- Sequence Co-ordination
- More relay functions can be customized
Optional functions for use
- RS-232 and RS-485 ports supporting
- DNP3.0 communication protocol support
- Modbus communication protocol is optional
- IEC 60870-501 communication protocol support
- IEC 60870-5-104 communication protocol support
- The recloser can communicate through GPRS(or) GSM(or) GPRS/GSM module with English or Specified language
Optional functions for use
- Rated currents, System phase current,
- Rated voltages, System phase voltage and secondary low voltage power supply voltage Frequency
- power (kWh), reactive power (kVarh), power factor
Optional reclosing interval for user pre-program
- reclosing times setting support
- Dead time setting support
Events recording function
- SOE 10000 operations record
- Fault record and normal operation record
Note：mean should customized by manufacturer if needed
Structural characteristics
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Vacuum Arc Quenching Chamber: The core component that uses a vacuum environment to extinguish arcs. It offers advantages such as strong breaking capacity, fast dielectric recovery, and long contact life, effectively ensuring the reliability of the equipment when interrupting fault currents.
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Insulating Pillars: Typically made from high-strength, weather-resistant insulating materials such as epoxy resin, these pillars provide reliable insulation support for the vacuum arc quenching chamber and other components, ensuring the insulation performance of the equipment in harsh outdoor environments.
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Operating Mechanism: Common types include spring-operated mechanisms and permanent magnet-operated mechanisms. Spring-operated mechanisms are simple in structure, highly reliable, and easy to maintain. Permanent magnet-operated mechanisms, on the other hand, offer advantages such as fast action, low energy consumption, and long mechanical life, enabling quick and precise opening and closing operations of the recloser.
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Current Transformers and Voltage Transformers: Some reclosers are equipped with current transformers and voltage transformers to measure current and voltage signals in the line. These transformers provide data support for protective devices and control devices, enabling the monitoring and protection functions of the power system.
Actual Photo
Installation Diagram
Environmental requirement
|
Maximum temperature: |
+40°C |
|
Minimum temperature: |
-30°C |
|
Monthly average humidity |
95% |
|
Humidity: |
90% |
|
Above sea level: |
2500m or higher |
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Ambient air Not apparently polluted by corrosive and flammable gas, vapor |
|
Solutions for Auto Circuit vacuum recloser
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Saudi Arabia Distribution Network Automation Upgrade Project Solution: Recloser Application and Technical Synergy1.Project Background and Demand Analysis1.1 Saudi Distribution Network Upgrade RequirementsSaudi Arabia is advancing its "Vision 2030" energy transition plan, aiming to achieve 40% distribution network automation by 2025. Key initiatives include deploying 33,000 intelligent ring main units (RMUs) and reclosers in 11 cities like Riyadh and Dammam to enhance grid reliability and renewable energy integration. Current challenges include: Aging Infrastructure: Existing RMUs and pole-mounted circuit b -
Adaptive Recloser Solution for Indonesia's Volcanic Geothermal Plants: Enhancing Grid Resilience in Extreme EnvironmentsProject BackgroundIndonesia possesses approximately 40% of the world's geothermal resources, with a geothermal power generation potential of 23–28 GW. However, by 2022, only about 2.3 GW had been developed. The government aims to achieve 5,000 MW of installed capacity by 2025 but faces multiple challenges: Grid Stability Issues: Geothermal plants are predominantly located in remote volcanic zones (e.g., Sumatra, Java), where frequent geological activity causes earthquake- and landslide-induced d -
Philippines Vacuum Recloser — Typhoon Failure Analysis and Wind-Resistant Remote O&M Solution for 13.2kV/34.5kV Distribution NetworksI. Core Challenges Facing the Philippine Distribution Network1.1 Frequent Typhoons — Mechanical Impact and Post-Disaster RestorationDimensionDataImpact on Distribution NetworkAverage annual typhoon landfalls20 (PAGASAdata)Lines endure continuous mechanical stress during the May-December typhoon seasonSuper typhoon maximum wind speed>250 km/h (e.g., 2024 Typhoon Gaemi)Broken conductors, collapsed poles, hardware fatigue fracturePost-typhoon area outage duration3-14 days (industry survey
Reference Projects for Auto Circuit vacuum recloser
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DTEK Grid Upgrade: Operation of Rockwill 10kV Smart Recloser in -40°C Extreme Cold Environment Ukraine Case StudyAs a benchmark for Chinese‑manufactured medium‑voltage distribution equipment going global, Rockwill established in‑depth cooperation with DTEK Kyiv Power Grid, Ukraine. Tailored outdoor vacuum recloser solutions were mass‑deployed to address existing weaknesses in local 10 kV distribution networks, comprehensively improving regional power supply reliability and automation to build a flagship distribution grid modernization project in Kyiv.01 Project Background: Core Pain Points of DTEK Kyiv Dis -
Rockwill Ukraine 186 Units 12kV Outdoor Vacuum Recloser Project Success CaseIn response to the operational characteristics of Ukraine’s local power grid and targeting harsh high-latitude outdoor working conditions, we rely on core technologies of intelligent reclosing and self-healing to precisely adapt to the complex grid environment with frequent thunderstorms and drastic diurnal temperature variations, steadily promoting the automatic and intelligent upgrade of regional rural power grids and suburban distribution networks.01 Project Overview1.1 Project BackgroundIn 2 -
Successful Case of 170 Sets of 11kV Automatic Recloser Project in KenyaAgainst the backdrop of quality upgrading for Kenya’s urban and rural power grids, 11kV auto-reclosers deliver reliable performance to suit local climates and grid conditions. It enables rapid fault isolation and efficient operation and maintenance, forming a core safeguard for the upgrading of Kenya’s urban and rural distribution networks.01 Project Overview1.1 Project BackgroundIn May 2023, 170 sets of 11kV Automatic Reclosers (Model: RCW12M) were officially supplied and applied to the medium-
Documentation Resource Library Auto Circuit vacuum recloser
Certifications Auto Circuit vacuum recloser
FAQ for Auto Circuit vacuum recloser
The Rockwill standard smart recloser offers high precision with a wide measuring range (2A–16,000A). Simply ensure your normal current is within this standard range when making a selection.
Yes. In addition to the standard 2A–16,000A range, Rockwill provides custom-configured units for ultra-low current measurement and protection in the 0.1A–2A range.
The controller supports SOE with 10,000 operations record, fault record, and normal operation record. This helps utilities analyze fault events, verify protection operations, and improve maintenance planning. It is suitable for Circuit Recloser applications where event traceability is important.
Yes. The controller supports reclosing times setting and dead time setting, allowing users to pre-program the reclosing interval based on different protection schemes. This flexibility is important for Automatic Recloserprojects that require adaptive reclosure strategies.
Yes. We support customized protection, communication, CT ratio, cable length, and mounting type. we also provide Outdoor Recloser/Reclosure OEM/ODM China services.
Yes. The RCWP, a cost-optimized option in the RCW+ series, features dual sensors, flagship controller, and 30,000 operations with permanent magnet three-phase linkage, while offering downgrade options (lock box removal, lockout removal, sensor/controller downgrade) so customers pay only for what they need.
The ZW32-type VCB is a basic circuit breaker or demarcation switch without built-in auto-reclosing logic, whereas the RCW vacuum recloser is specifically engineered as a full-function recloser with integrated protection, sensors, and communication for smart grid applications.
Unlike the ZW32, which requires an external controller for automation, the RCW series complies with IEC 62271-111 and ANSI C37.60, and is supported by complete type test reports.With silicone rubber or epoxy insulation offering superior aging resistance and low water absorption, the RCW series is the professional choice for international distribution automation projects.
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