| Brand | ROCKWILL |
| Model NO. | Customization 10kV 10.5kV 11kV 11.5kV 15.6kV Single-phase outdoor Automatic Smart recloser/reclosure |
| Rated voltage | 15.6kV |
| Rated normal current | 1250A |
| Rated short circuit breaking current | 25kA |
| Power frequency withstand voltage | 60kV/min |
| Rated lightning impulse voltage | 125kV |
| manual closing | Yes |
| Series | RCW |
Description
As a pioneering original equipment manufacturer (OEM) in China’s recloser industry, we have accumulated decades of R&D expertise, taken the lead in establishing the original industry standards, built a fully independent end-to-end production system, and delivered reliable product solutions for power grid construction.
The 10kV 10.5kV 11kV 11.5kV 15.6kV Single-phase outdoor Automatic Smart recloser/reclosure is an intelligent outdoor switching device specifically designed for medium-voltage distribution networks. Using vacuum as the arc-extinguishing medium, this equipment can quickly interrupt fault currents and effectively isolate short-circuits, overloads, and other faults in the distribution grid. It features an automatic reclosing function that restores power supply automatically after fault elimination, significantly reducing power outage time and improving power supply reliability. With its compact and rugged outdoor structure design, it adapts to various harsh natural environments—stable operation in high temperatures, severe cold, high humidity, or sandy conditions—making it a vital device for ensuring safe and efficient operation of medium-voltage power lines.
Key Features
High-efficiency Arc Extinguishing Performance
Adopting vacuum arc extinguishing technology, it features strong insulation and rapid arc extinction. It prevents arc reignition, extends the equipment's service life, and reduces maintenance costs.
Precise Automatic Reclosing
Automatically closes the circuit according to the preset program. It can distinguish between transient and permanent faults. For transient faults, it restores power supply rapidly; for permanent faults, it locks immediately to minimize the power outage scope.
Excellent Environmental Adaptability
With a high-strength and corrosion-resistant outer shell and internal protective treatment, it can operate stably in harsh environments, adapting to temperatures ranging from -40°C to +70°C.
Intelligent Monitoring and Remote Control
It can monitor key parameters such as current and voltage in real-time and upload data. Supporting remote opening and closing operations, it improves fault handling efficiency and the intelligent level of grid operation and maintenance.
High Safety and Reliability
Equipped with complete mechanical and electrical interlocking devices to prevent misoperation, it has a long-life design with tens of thousands of mechanical operation cycles, ensuring stable power supply.
Parameters
The voltage classes of some of these Automatic Reclosers include 6kV, 6.3kV, 6.6kV, 6.9kV, 7.2kV, 10kV, 10.5kV, 11kV, 11.5kV, 12kV, 13.2kV, 13.8kV, 14.5kV, 14.4kV, 15kV, 15.5kV, 15.6kV, 17.5kV, 20kV, 21.9kV, 22kV, 24kV, 30kV, 33kV, 33.5kV, 34.5kV, 35kV, 36kV, 38kV, 38.5kV, 40.5kV, 44kV, 45kV, 46kV, 66kV and 69kV. Rated Short-Circuit Breaking Current includes 8kA, 12.5kA, 16kA, 20kA, 25kA, 31.5kA and customization is available.
Rated maximum voltage |
15.6kV |
Rated maximum current |
1250A |
Rated frequency |
50Hz |
Rated short circuit breaking current |
12.5kA |
Rated peak value withstand current |
31.5kA |
Rated 1min power frequency withstand voltage（Single-phase Silicone rubber pole (unable the gas)） |
60kV |
Rated lightning impulse voltage（Single-phase Silicone rubber pole (unable the gas)） |
125kV |
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) |
Number of voltage sensors（Single-phase Silicone rubber pole (unable the gas)） |
≤1 |
Opening time |
≤20ms（Magnetic actuator） |
Closing time |
≤30ms（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（Single-phase Silicone rubber pole (unable the gas)） |
2-hole NEMA |
Lightning arrester |
≤6 |
Mounting type |
Single / double column |
With 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 |
With optional communication protocols & I/O port for user choice |
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 |
With 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 |
With optional reclosing interval for user pre-program |
reclosing times setting support Dead time setting support |
With events recording function |
SOE 10000 operations record Fault record and normal operation record Note：mean should customized by manufacturer if needed |
Environmental requirement：
Maximum temperature: |
+40°C |
Minimum temperature: |
-30°C |
Monthly average humidity |
95% |
Humidity: |
90% |
Above sea level: |
2500m or higher |
Ambient air Not apparently polluted by corrosive and flammable gas, vapor |
What are the technical parameters of the outdoor vacuum recloser?
Rated Voltage: 38kV, indicating the voltage level at which the recloser can operate normally. This ensures that the insulation and electrical performance of the device meet the required standards at this voltage.
Rated Current: Available in various specifications, such as 800A, 1200A, etc. This represents the maximum current that the recloser can carry continuously during normal operation. The appropriate rated current value should be selected based on the load current of the line.
Rated Short-Circuit Breaking Current: Reflects the breaking capability of the recloser during short-circuit faults. Common specifications include 16kA, 20kA, etc. A higher short-circuit breaking current indicates that the recloser can more reliably interrupt short-circuit currents, protecting the safety of the power system.
Rated Short-Circuit Making Current: Represents the maximum peak current that the recloser can close during a short-circuit fault. This value is typically greater than the rated short-circuit breaking current to ensure that the recloser can reliably close and withstand the impact of short-circuit currents at the moment of fault.
Reclosing Time Interval: Generally adjustable between 0.5 seconds and several seconds. Depending on the requirements of different power systems and types of faults, an appropriate reclosing time interval can be set to enhance the reliability and continuity of power supply.
Distribution network faults occur occasionally with long data accumulation cycles. RCW single-phase vacuum reclosers are installed on overhead poles and may only encounter faults once every several months or years.
Conventional controllers can only store hundreds of records and old data will be overwritten by new events. The 10,000-point large-capacity SOE storage prevents the loss of early fault records, preserving complete time-sequenced event logs for later analysis.
Yes, Rockwill provides comprehensive OEM/ODM programs for the RCW single-phase vacuum recloser. To maintain our high quality standards, we partner exclusively with regional manufacturers and distributors who possess robust engineering expertise and local service capabilities.
Our goal is to build strategic alliances that deliver not just premium hardware, but exceptional local technical support for smart grid modernization.
While the ZW32 is a basic circuit breaker requiring an external controller, the RCW is a fully integrated smart grid recloser with built-in protection, sensors, and communication.
Furthermore, the RCW strictly complies with IEC 62271-111 and ANSI C37.60 standards, featuring premium insulation tailored for international distribution automation projects.
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