| Brand | ROCKWILL |
| Model NO. | 21.9kV 22kV 24kV 25.8kV MV Single phase outdoor vacuum Auto Circuit recloser Source Manufacturer |
| Rated voltage | 21.9kV |
| Rated normal current | 1250A |
| Rated short circuit breaking current | 25kA |
| Power frequency withstand voltage | 85kV/min |
| Rated lightning impulse voltage | 185kV |
| 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 RCW series automatic circuit reclosers can use on overhead distribution lines as well as distribution substation applications for allvoltage classes 11kV up to 38kV at 50/60Hz power system. and it’s rated current can reach 1250A.The RCW series automatic circuit reclosers integrates the functions of control, protection, measurement, communication, fault detection, on-line monitoring of closing or opening.The RCW series vacuum recloser is mainly combined with integration terminal, current transformer, permanent magnetic actuator and it’s recloser controller.
Features：
Voltage Versatility: Compatible with 21.9kV/22kV/24kV/25.8kV MV systems, ideal for diverse outdoor power grid scenarios.
Single-Phase Vacuum Technology: Adopts vacuum interrupter structure, ensuring zero arc leakage and reliable short-circuit breaking performance.
Automatic Reclosing Function: Realizes multiple auto-reclosing cycles, effectively reducing power outage time and improving grid stability.
Outdoor-Ready Design: IP66-rated enclosure (customizable) with corrosion-resistant coating, suitable for harsh environmental conditions like high humidity and extreme temperatures.
Source Manufacturer Advantage: Full-chain independent R&D and production, customizable parameters to meet regional grid standards and project requirements.
High Mechanical & Electrical Life: Long service life with 10,000+ mechanical operations, minimizing maintenance costs for power utilities.
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 |
21.9kV |
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 Epoxy resin pole) |
85kV |
Rated lightning impulse voltage (Single-phase Epoxy resin pole) |
185kV |
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 Epoxy resin pole) |
≤2 |
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 Epoxy resin pole) |
4-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 |
Product show：
What are the scenarios in which the 38kV outdoor vacuum recloser is used？
38kV Overhead Transmission Lines: Widely used in branch lines and end lines of 38kV overhead transmission lines as control and protection devices. When a fault occurs in the line, the recloser can quickly interrupt the fault current and automatically perform reclosing operations, reducing downtime and improving power supply reliability.
38kV Substation Outgoing Lines: Installed on the outgoing side of 38kV substations to control and protect the electrical connections between the substation and the transmission lines. When a fault occurs in the substation outgoing lines, the recloser can promptly isolate the fault, ensuring the safe operation of the substation, and quickly restore power supply through the reclosing function.
38kV Distribution Network Automation System: As one of the key devices in the distribution network automation system, the recloser works in conjunction with other intelligent devices to achieve remote monitoring, control, and fault location functions for the distribution network. By communicating with feeder terminal units (FTUs) and distribution automation master stations, the recloser receives control commands and uploads operational status information, enhancing the automation level and operational management efficiency of the distribution network.
This controller for Outdoor Single-phase vacuum recloser integrates a dedicated local operation panel. On-site parameter configuration, local operation and fault information review can be realized directly. Many general controllers do not have built-in panels and need to connect an external third-party HMI for local human-machine interaction.
Ordinary distribution controllers mostly only collect position signals from auxiliary switches. This controller, matched for Outdoor Single-phase vacuum recloser, is natively integrated with on-line monitoring of closing and opening. It can monitor the operating status of closing and opening in real time and grasp the operation condition of the recloser body.
It supports multiple MV voltage classes including 21.9kV/22kV/24kV/25.8kV, while most ordinary reclosers are built for a single fixed voltage.
Built on full-chain independent R&D and production instead of simple assembly. It achieves 10,000+ mechanical operations, longer than economy-grade reclosers and cuts utility maintenance expenses.
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.
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