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High-Quality Single phase small electrical fire-resistant current limiting protector Supplier, Manufacturer
High-Quality Single phase small electrical fire-resistant current limiting protector Supplier, Manufacturer
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High-Quality Single phase small electrical fire-resistant current limiting protector Supplier, Manufacturer
High-Quality Single phase small electrical fire-resistant current limiting protector Supplier, Manufacturer

High-Quality Single phase small electrical fire-resistant current limiting protector Supplier, Manufacturer

This compact single-phase current-limiting protector rapidly interrupts short-circuit faults within microseconds to prevent electrical fires. It features adjustable overload, temperature, and voltage protection, alongside cable temperature and leakage monitoring. Supporting RS485 wired and optional wireless LoRa, NB, or 4G communication, it enables remote system integration. Designed for DIN-rail mounting in a 100x72x70mm housing, it operates reliably from -20°C to 85°C. Ideal for low-voltage residential and commercial circuits, it enhances safety through fast fault response and real-time monitoring, helping to mitigate arc faults and other electrical hazards.

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Product Description

Technical Parameters

Technical Specifications Unit Parameters
Rated Current A 20 / 32 / 40
Supply Voltage VAC 220
Display Mode - LCD Screen
Short-Circuit Protection μs < 150
Overload Protection %In/s Action range: 0-100%In (configurable); Delay: 0-60
Temperature Monitoring ℃/s Action range: 0-85 (configurable); Delay: 0-60
Communication Mode - Wired RS485; Wireless LORA, NB, 4G (optional)
Ambient Temperature ℃ -20 to 85
Ambient Humidity %RH < 95
Product Size mm 100(L) * 72(W) * 70(H)
Installation Method - Standard 35mm DIN Rail Mounting

Product Display

Single phase electrical fire-resistant current limiting protector
small electrical fire-resistant current limiting protector

Outline and Installation Dimension

Installation Dimension

Basic Functions

This device provides comprehensive electrical safety solutions, including:

  • Short-circuit Protection: 100μs ultra-fast current-limiting with alarm.
  • Overload Protection: 3–60s adjustable delay with alarm.
  • Temperature Management: Integrated over-temperature current-limiting and alarm.
  • Line Monitoring: Tracks over/under-voltage, line temperature, and leakage (optional current-limiting).
  • Remote Connectivity: Supports RS485 and wireless (LORA, NB, 4G) for platform-based monitoring.

Important Information

Safety Notes:

  1. The protector utilizes non-mechanical contacts. When in current-limiting mode, output terminals still carry voltage. Never touch live terminals; always disconnect power before maintenance.
  2. Overheating caused by high ambient temperatures or restricted airflow will trigger protection. Allow the unit to cool and ensure adequate ventilation before resuming use.

Installation & Usage:

  • Leakage transformers and wire temperature sensors are optional accessories.
  • The protector's rated current must match the upstream breaker (e.g., 32A breaker requires a 32A protector setting).
  • Install in well-ventilated, non-corrosive environments. Avoid humidity and dust.
  • Strictly follow wiring diagrams and ensure terminals are tightened to prevent overheating.

Frequently Asked Questions

Q1: How fast does the short-circuit protection respond?
The device features an ultra-fast current-limiting response of less than 150μs to prevent electrical fires.
Q2: Can I monitor the device status remotely?
Yes, the protector supports RS485 wired communication and optional wireless modules like LORA, NB-IoT, and 4G for remote platform monitoring.
Q3: Is it safe to touch the device while it's in protection mode?
No. Since it uses non-mechanical contacts, the output may still carry voltage even when current-limiting is active. Always power off before inspection.
Q4: What mounting method is required?
The device is designed for standard 35mm DIN rail mounting, making it compatible with most industrial and residential distribution boxes.
Q5: What should I do if the over-temperature alarm triggers?
Ensure the installation area has proper ventilation and check if the ambient temperature is within the -20 to 85℃ range. Let the device cool down before resetting.
Q6: Are the leakage and temperature sensors included?
Leakage transformers and wire temperature sensors are optional components and can be added based on your specific monitoring requirements.

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