
Single-phase electrical fire-limiting circuit protector is mainly used for protecting against short-circuit and overload faults in the terminal lighting circuits of places with high fire hazards, reliably eliminating arc sparks from short-circuit or overload fault points, and preventing short-circuit fires from occurring at their source. It is particularly suitable for: various professional markets, large shopping malls, cultural heritage units, religious places, etc.
Product Features
Short-circuit breaking capacity: 0.00015 seconds
Real-time current measurement
Fan design to prevent equipment overheating
Track installation, enhance work efficiency
Application fields cover various sectors
Feature Description
Fault Protection Function: In the event of a product malfunction, a fault indicator will be activated, and the self-protection function will be initiated.
Overload Protection Function: Cuts off the overloaded circuit after continuous overload for 3 seconds to prevent fires caused by overload.
Short-circuit protection function: In the event of a short circuit in the protected power distribution circuit, the circuit power is cut off within 150 microseconds to prevent fires caused by the short circuit.
Real-time current measurement function: Measures the current magnitude in the protected distribution circuit in real time.
Communication Function: Supports connection to electrical fire monitoring equipment for remote monitoring.
Real-time temperature measurement function: Monitors the cable temperature within the protected power distribution circuit in real time. If the cable temperature exceeds the set threshold, an alarm message is sent to the host computer, and the alarm status remains until reset.
Technical Specifications
| Technical Specifications | Index | |
| Rated Voltage | AC220V/50Hz | |
| Work schedule | On-site power supply, 24/7 operation | |
| Power Consumption | Self-consumption power ≤ 3W (no load) | |
| Port rate | 9600 (default) | |
| Communication Methods | RS485 | |
| Communication Protocol | MODBUS-RTU | |
| Work environment | Workplace | Areas with weatherproof and dustproof conditions |
| Ambient Temperature | -25℃~+50℃ | |
| Relative Temperature | 10% to 95% (non-condensing) | |
| Poster Height | No more than 5,000 meters | |
Dimensions and wiring diagram

Front View Side View
Wiring Diagram






























