Claire
Mr.Fu
Claire
250A Three Phase Electrical Fire Prevention Current Limiting Protector - Reliable Safety Solution from China Suppliers and Factory
Key Features
In addition to core short-circuit current limiting protection, this device integrates multiple intelligent functions to form a comprehensive electrical safety monitoring system.
- Overload Protection: Triggers current limiting when line current exceeds the rated value for a sustained period.
- Overtemperature Protection: Monitors the unit's own temperature or cable temperature, activating protection when overheating occurs.
- Multifunction Monitoring: Real-time detection and display of various electrical parameters including three-phase voltage, current, frequency, and residual current (leakage).
- Smart Alarm: Features audible and visual alarms; uploads fault information to cloud platforms or backend systems via 4G, WIFI, or RS485 for remote monitoring.
- Additional Protections: Some models include over/under voltage protection, phase loss protection, and arc fault detection.
Technical Parameters
| Item | Specification |
|---|---|
| Rated Current | 200A / 250A |
| Supply Voltage | 220VAC (175~250V) |
| Display | Chinese LCD Screen |
| Short Circuit Protection | <150us |
| Overload Protection | Range: 0~100%; Delay: 0~60s |
| Overvoltage Protection | Range: 221~300V; Delay: 0~60s |
| Undervoltage Protection | Range: 100~219V; Delay: 0~60s |
| Wire Temperature Monitoring | Range: 0~85℃; Delay: 0~60s |
| Leakage Current Monitoring | Range: 30~1000mA; Delay: 0~60s |
| Communication | RS485, Wireless LORA, NB-IoT, 4G (Optional) |
| Operating Temperature | -20~85℃ |
| Ambient Humidity | <95%RH |
| Product Dimensions | 550(L)*288(M)*200(H) mm |
| Installation | Bottom Screw Mounting |
Product Display
Outline and Installation Dimension
550(L)*288(M)*200(H) mm
Application Scenarios
Thanks to its superior short-circuit protection, this three-phase device is widely used in high-risk commercial and industrial environments where electrical safety is critical.
- Commercial Buildings: Malls, wholesale markets, and warehouses.
- Public Institutions: Schools, hospitals, hotels, and entertainment venues.
- Special Facilities: Electric vehicle charging stations, historic buildings, and dormitories.
Frequently Asked Questions
What is the response time of the short-circuit protection in this device?
The short-circuit protection responds in less than 150 microseconds (<150µs), ensuring extremely fast interruption of fault currents to protect connected equipment and wiring.
What rated current options are available for this current limiter?
This device is available in two rated current versions: 200A and 250A, suitable for high-capacity three-phase electrical distribution systems in commercial and industrial environments.
What communication methods does the device support for remote monitoring?
The device supports RS485, Wireless LORA, and NB-IoT as standard communication options. 4G connectivity is available as an optional upgrade, enabling fault data to be uploaded to cloud platforms or backend management systems in real time.
What types of protection does this device provide beyond short-circuit protection?
In addition to short-circuit protection, the device offers overload protection, overtemperature protection, leakage current monitoring, and optional features such as overvoltage/undervoltage protection, phase loss protection, and arc fault detection.
Where is this three-phase current limiting protector typically installed?
It is widely used in commercial buildings (malls, warehouses), public institutions (schools, hospitals, hotels), and special facilities such as electric vehicle charging stations, historic buildings, and dormitories — anywhere requiring reliable electrical safety management.
What are the installation dimensions and mounting method for this device?
The device measures 550(L) × 288(W) × 200(H) mm and is mounted using bottom screw installation. It is designed for panel or enclosure mounting in standard electrical distribution environments.