Wholesale Miniature Single-Phase Current-Limiting Protector with LCD Screen 220VAC Manufacturers, Factories

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Wholesale Miniature Single-Phase Current-Limiting Protector with LCD Screen 220VAC Manufacturers, Factories

This compact single-phase current-limiting protector offers advanced circuit safety. It instantly detects and limits short-circuit currents within microseconds, effectively preventing arc faults and electrical fires. The device provides comprehensive protection against overloads, over-voltage, and under-voltage conditions. It features real-time monitoring of cable temperature and leakage current, triggering alarms or disconnection when thresholds are exceeded. With integrated RS485 or wireless communication, it supports remote monitoring and management via a central platform, ensuring high reliability for modern electrical systems.

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Product Description

Technical Parameters

Specifications	Unit	Parameters
Rated Current	A	20\32\40\50\63\80
Supply Voltage	VAC	220 (175~250V)
Display	\	LCD Screen
Short Circuit Protection	ms	<150
Overload Protection	\	Range: 0~100%In adjustable; Delay: 0~60s
Overvoltage Protection	\	Range: 221~300V adjustable; Delay: 0~60s
Undervoltage Protection	\	Range: 100~187V adjustable; Delay: 0~60s
Temperature Monitoring	\	Range: 0~85°C adjustable; Delay: 0~60s (Optional)
Communication	\	Wired RS485, Wireless LORA, NB, 4G (Optional)
Operating Temperature	°C	-20~85
Humidity	RH	<95%
Dimensions	mm	105(L)56(W)67(H)
Mounting	\	Standard 35mm DIN rail

Product Display

Outline and Installation Dimension

LCD Display Setting Parameters

Channel	Alarm Threshold Range	Default Alarm Value	Default Protection Setting	Delay Range	Default Delay
Overvoltage	221–300V	242V	ON	0–60s	3s
Undervoltage	100–219V	187V	ON	0–60s	3s
Current	0–100%In	100%In	ON	0–60s	3s
Internal Temperature	0–85°C	80°C	ON	0–60s	3s
Line Temperature	0–85°C	80°C	ON	0–60s	3s
Leakage Current	30–1000mA	30mA	ON	0–60s	3s

Other Considerations

The leakage current transformer is an optional accessory.
The line temperature sensor is an optional accessory.
When selecting a current-limiting protector, the rated current set for the protector must match that of the circuit breaker immediately upstream. For example, if the upstream circuit breaker has a rated current of 32A, the current-limiting protector must also be set to 32A. To ensure proper operation, never use a current-limiting protector in a circuit where its rated current does not match that of the upstream circuit breaker.
The current-limiting protector features a DIN-rail mounting design. It can be installed on a switchgear panel or inside an enclosure with excellent heat dissipation. Ensure the installation location is free of water droplets, corrosive gases, and dust, and pay attention to ambient temperature and ventilation.
Follow the wiring diagram strictly during installation. To prevent excessive contact resistance from causing local overheating and to avoid malfunctions due to poor connections, ensure all terminal screws on the protector are securely tightened.

Frequently Asked Questions (FAQ)

How quickly does the short circuit protection respond?

The device features an ultra-fast short-circuit response time of less than 150 milliseconds (<150ms) to effectively protect upstream and downstream circuits from severe damage.

How is the protector installed?

It utilizes a standard 35mm DIN-rail mounting method, enabling simple and fast installation inside switchgear panels or electrical enclosures.

Can this protector communicate with building management or IoT systems?

Yes, it supports optional wired RS485 communication as well as wireless connectivity options such as LoRa, NB-IoT, and 4G for remote data acquisition and monitoring.

Why must the protector's rated current match the upstream circuit breaker?

Matching the rated current prevents coordination failures in circuit protection. If the currents do not match, protection thresholds may conflict, leading to unexpected tripping or insufficient fault protection.

Can the overvoltage and undervoltage parameters be adjusted on-site?

Yes, parameters can be customized via the LCD screen. Overvoltage protection can be configured between 221V and 300V, while undervoltage can be set between 100V and 219V, with adjustable delay times from 0 to 60 seconds.

Wholesale Miniature Single-Phase Current-Limiting Protector with LCD Screen 220VAC Manufacturers, Factories

Product Description

Technical Parameters

Product Display

Outline and Installation Dimension

LCD Display Setting Parameters

Other Considerations

Frequently Asked Questions (FAQ)

How quickly does the short circuit protection respond?

How is the protector installed?

Can this protector communicate with building management or IoT systems?

Why must the protector's rated current match the upstream circuit breaker?

Can the overvoltage and undervoltage parameters be adjusted on-site?

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