Automatic Reclosing Miniature Circuit Breaker

The Automatic Reclosing Miniature Circuit Breaker supplied by China-based manufacturer Zhejiang Soutya New Energy LLC.It features a miniature circuit breaker as the main switch, equipped with an ultra-small intelligent electrical operator with a microprocessor. It has functions for overvoltage, undervoltage, voltage loss, and time delay actions, with automatic reconnection after voltage recovery. It complies with the technical specifications for distributed photovoltaic grid-connected circuit breakers: GB/T 10963.1, IEC/EN 60898-1, and Q/GDW 1972.

Characteristic

Short Circuit Protection
Over/Under/Loss of Voltage Protection
after voltage recovery
10kA Rated Breaking Capacity
Automatic closing time:7s-10s

Technical Parameter

Operating Environment

Altitude:≤2000m;
Installation Category:Ⅱ、Ⅲ;
Installation Method: Embedded vertical DIN rail mounting
Pollution Degree:2.

Wiring Diagram

Appearance and Installation Dimensions

Application scenarios

1. Rooftop & C&I String PV Systems

400 V/230 V, single-phase or three-phase residential and commercial rooftop arrays; mounts inside the AC junction box that sits between the string inverter and the utility meter to give overload, short-circuit and automatic re-closing after grid-voltage recovery.

2. Grid-tie Inverter AC Output

Factory-fitted by inverter OEMs as the standard AC protector on 5-15 kW single-phase or 10-30 kW three-phase models; 10 kA breaking capacity covers the high prospective fault current seen at the distribution board.

3. Distributed-energy Metering Boards

Used as the main isolating/MCB device inside the “PV meter box” required by State-Grid / China Southern Power utility standards; under-voltage trip <150 V and over-voltage trip >290 V guarantee automatic disconnection when the grid drifts outside the anti-islanding window.

4. Car-port & Agrivoltaic Strings

Outdoor combiner pillars where manual reset is inconvenient; 20 000-cycle mechanical life and –25 °C…+60 °C rating allow maintenance-free, seasonal operation.

5. Small Battery-based Storage Systems

AC-coupled Li-ion or LiFePO₄ retrofits; breaker opens on battery-inverter over-current and recloses once the BMS signals normal voltage, eliminating customer call-outs.

6. Street-lighting & EV-charging Kiosks

Feeds the 32 A/40 A lighting branch or Level-2 charger from the same PV circuit; compact 1P+N or 3P+N 54 mm/90 mm footprint saves precious enclosure space.

7. Farm & Telecom Shelter Distribution

Provides undervoltage protection for motor-driven pumps or telecom rectifiers that must shut down when the rural weak grid collapses, then automatically restarts when the line recovers >185 V.

8. Portable PV Skid & Rental Units

Quick-setup rental generators for festivals or construction sites; plug-and-play reclosure avoids manual intervention every time the grid or genset hiccups.