ODM Single phase small electrical fire-resistant current limiting protector Supplier, Companies

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ODM Single phase small electrical fire-resistant current limiting protector Supplier, Companies

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	-	Chinese 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

small electrical current limiting protector-2

Basic Functions

This device provides short-circuit protection (100μs fast current-limiting + alarm), overload protection (3–60s adjustable delay + alarm), and over-temperature protection (current-limiting + alarm). It also monitors over/under-voltage, line temperature, and leakage (alarm + optional current-limiting). RS485/wireless (optional) enables remote monitoring via platforms.

Important Information

Important Notes:

The protector uses non-mechanical contacts: when in current-limiting mode, its output still carries voltage — never touch terminals while live; always power off before inspection/maintenance.
Overheating (from high ambient temperature or poor ventilation) will trigger protection: let it cool down before reuse; ensure good ventilation.

Other Notes:

Leakage transformers and wire temperature sensors are optional.
Match the protector’s rated current to the upstream breaker (e.g., 32A breaker → set protector to 32A); never use mismatched ratings.
Install in non-corrosive, well-ventilated areas (or heat-dissipating enclosures); avoid humidity and dust.
Follow wiring diagrams; tighten terminals to prevent poor contact or overheating.

Frequently Asked Questions

How fast does the short-circuit protection trigger?

The short-circuit protection features a ultra-fast current limiting speed within 100μs (action time <150μs) combined with an alarm to effectively isolate faults and prevent electrical fires.

Can I safely touch the output terminals when current-limiting is activated?

No. Since the device utilizes electronic non-mechanical contacts, voltage is still present at the output terminals during current-limiting operation. Always turn off the upstream power before maintenance.

How do I correctly set the protector's rated current?

The device's rated current (20A, 32A, or 40A) must strictly match the upstream circuit breaker's rated value. For example, if you are using a 32A breaker, configure the protector to 32A.

What communication methods does this protector support?

The unit provides standard wired RS485 communication, along with optional wireless solutions such as NB-IoT, 4G, and LoRa for seamless cloud and platform-level remote monitoring.

How is this device installed in an electrical cabinet?

The protector features a compact enclosure measuring 100(L) * 72(W) * 70(H) mm and supports standard 35mm DIN rail mounting for quick and convenient cabinet integration.

ODM Single phase small electrical fire-resistant current limiting protector Supplier, Companies

Product Description

Technical Parameters

Product Display

Outline and Installation Dimension

Basic Functions

Important Information

Frequently Asked Questions

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