OEM GNM1E Electronic Plastic Case Circuit Breaker Manufacturers, Factories

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OEM GNM1E Electronic Plastic Case Circuit Breaker Manufacturers, Factories

GNM1E series electronic plastic shell circuit breaker (hereinafter referred to as circuit breaker) is suitable for AC 50Hz/60Hz, its rated insulation voltage is 800V, rated working voltage 690V and below, and the rated working current is used for infrequent conversion and infrequent motor start in the circuit of 16~800A.

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Product Description

Purpose and scope of use

GNM1E series electronic plastic shell circuit breaker the circuit breaker has overload long delay reverse time limit, short circuit short delay reverse time limit, short circuit short delay time limit, short circuit instantaneous and under voltage protection function, residual current protection (optional), phase loss protection function (optional), can protect the line and power supply equipment from damage, circuit breaker protection characteristics are complete and accurate, can improve the reliability of power supply, avoid unnecessary power outages.

Circuit breakers are divided into two types: M type (high breaking type) and H type (high breaking type) according to their rated limit short-circuit breaking capacity. The circuit breaker has the characteristics of small size, high breaking capacity, short arc and vibration resistance. The circuit breaker should be installed vertically (i.e., vertically).

The circuit breaker has an isolation function, and its corresponding symbol: "/ | X".

The circuit breaker cannot be reversed, that is, only 1, 3, and 5 are allowed to be connected to the power line, and 2, 4, and 6 are allowed to be connected to the load line.

Model meaning

Note 1: Z indicates the operation of the rotating handle, and P indicates the operation of the electric mechanism.

Note 2: The specification code consists of six digits.

Note 3: Operation mode: no code for direct operation of the handle, Z for rotating the handle operation, and P for electric operation.

Note 4: The rated current of the shell level is divided into 125, 250, 400, 630 and 800.

Normal working conditions

Altitude: ≤2000m;
Ambient temperature: -5°C~+40°C, and the average value of 24 hours does not exceed +35°C;
Able to withstand the influence of humid air;
Able to withstand the influence of salt spray and oil mist;
The installation category of the main circuit breaker is III, and the installation category of the rest of the auxiliary circuits and control circuits is II.
When the maximum temperature is +40°C, the relative humidity of the air does not exceed 50%, and a higher relative humidity can be allowed at a lower humidity.
In a medium without explosion hazard, and the medium is not enough to corrode the metal and destroy the insulation of the gas and conductive dust;
In a place where there is no rain or snow.

Structural features

It has the characteristics of small size, high breaking capacity, short arc and anti-vibration;
The circuit breaker has an isolation function, and its rated insulation voltage is 800V;
According to the rated limit short-circuit breaking capacity, it is divided into two types: M type (higher breaking type) and H type (high breaking type);
It has the functions of overload long delay reverse time limit, short circuit short delay time limit, short circuit instantaneous and Under voltage protection, residual current protection (optional) and phase loss protection function (optional), which can protect the power supply equipment of the line from damage;
The protection characteristics are complete, accurate, and can improve the reliability of power supply.

The circuit breaker is in accordance with the standard

IEC 60947-1 & GB/T14048.1

General provisions for low-voltage switchgear and control equipment

IEC 60947-2 & GB/T14048.2

Low-voltage switchgear and control equipment Low-voltage circuit breakers (Appendix F Additional Requirements for Circuit Breakers with Electronic Overcurrent Protection)

IEC 60947-5.1 & GB/T14048.5

Low-voltage switchgear and control equipment, control circuits, electrical appliances and switching components

Optional features

Temperature monitoring and protection function: when the ambient temperature exceeds the set value (the default setting is 85°C), the controller will output an alarm photoelectric signal or open the circuit breaker;
Dual-channel passive signal output function: for signal (or alarm), AC230V5A capacity;
Overload thermal memory function: overload thermal memory function, short-circuit (short-delay) thermal memory function;
Fire spitting function: overload alarm does not trip (provide a pair of passive contacts) and provides shunt tripping function;
Communication function: standard RS232, RS485, Modbus fieldbus protocol;
Hand-held programmer connection: set various protection parameters of the circuit breaker and perform nearly 10 fault inquiries and various status displays;
Intelligent control module connection: converts the signal output of the optically isolated contact, including the programmer DO output function, and the high-end model has a liquid crystal display module.

Main functions and features

The intelligent controller is the core component of the molded case circuit breaker, which is used for motor protection or power distribution protection, to realize the measurement, protection, control and communication functions in the body, so that the line and power supply equipment are protected from overload, short circuit, grounding and other fault hazards.

Stable MCU microprocessor controller: the intelligent controller can self-supply power supply. As long as the phase is energized and the current is not less than 20% of its rated value, it can ensure the normal operation of the protection function;
Three-stage protection selective fit: the circuit breaker classified as class B and other short-circuit protection devices connected in the same circuit have selective fit under short-circuit conditions. Includes overload long delay anti-time limit, short-circuit delay (anti-time limit, fixed time limit), and short-circuit instantaneous configurations;
Adjustable parameter settings: features three protection parameter settings for action current and action time, adjustable in 4-10 steps according to load requirements (custom turn-off options available upon ordering);
High-current instantaneous tripping function: when closed, if encountering a short-circuit and large current (≥20Inm), the magnetic tripping mechanism trips directly for enhanced safety;
Tripping test function: the action characteristics of the circuit breaker are tested by the DC 12V voltage;
Fault self-diagnosis: continuously monitors the working status and operation of the intelligent controller itself;
LED status indications: pre-alarm indication (yellow LED) when load current reaches/exceeds setting value; overload indication (red LED) when limits are exceeded;
Flux exchanger double air gap technology: ensures stable work, eliminates malfunction, guarantees reliable tripping, and operates with small power;
High protection accuracy: overload protection and short-circuit short-delay protection action time accuracy is within ±10%, and short-circuit instantaneous protection action value accuracy is within ±15% depending on action current.

Frequently Asked Questions (FAQ)

What are the main protection functions of the GNM1E series electronic circuit breaker?

It features comprehensive protection capabilities including overload long delay reverse time limit, short circuit short delay reverse time limit, short circuit short delay time limit, short circuit instantaneous, and under-voltage protection. Optional functions include residual current protection and phase loss protection.

What is the difference between M type and H type models?

The distinction is based on their rated limit short-circuit breaking capacity, where M type indicates the high breaking type and H type represents the high breaking type. Both types maintain features like small size, short arc, and high vibration resistance.

What are the installation requirements and working conditions?

The circuit breaker should be installed vertically. It operates normally at altitudes ≤ 2000m, ambient temperatures between -5°C and +40°C (with a 24-hour average not exceeding +35°C), and in environments free from rain, snow, explosion hazards, or corrosive gas/conductive dust.

Can the protection parameters of the controller be adjusted?

Yes. The intelligent controller features three protection parameter settings for action current and action time, which can be adjusted in 4 to 10 steps. This allows users to configure the controller precisely according to specific load current requirements.

Does the circuit breaker support remote communication and monitoring?

Yes, optional communication features support standard RS232, RS485, and Modbus fieldbus protocols. It can also connect to a hand-held programmer for parameter configuration and fault inquiries, or to an intelligent control module with liquid crystal displays.

How does the high-current instantaneous tripping function protect the system?

If the circuit breaker encounters a severe short circuit and large current (≥20Inm) during closure, the magnetic tripping mechanism trips directly to isolate the fault immediately, providing reliable double protection.