1. Introduction:

DW45 series intelligent universal circuit breaker 1. Scope of application NA1 (DW45) series intelligent universal circuit breaker is suitable for distribution of electric energy and protection in power distribution networks with AC 50Hz, rated voltage 380V, 660V, and rated current 630A-2000A. Lines and power equipment are protected from overload, under-voltage, short circuit, single-phase grounding and other faults. The circuit breaker has a variety of intelligent protection functions, which can achieve selective protection and precise action to avoid unnecessary power outages and improve power supply. reliability.

2. Intelligent functions:

a. It has overload long delay inverse time limit, short delay inverse time limit, short delay fixed time limit, and instantaneous various functions, which can be set by the user to form the required protection characteristics;

b. Single-phase grounding protection performance;

c .Display function: setting current Ir display, operating current display;

d. Ammeter function: detects main circuit current;

e. Alarm function: overload alarm;

f. Self-checking function: overheating protection, equivalent contact wear, microcomputer self-diagnosis;

g. Test function: test the action characteristics of the release.

 3.Function and scope of application

Overload protection: When the current flowing in the circuit exceeds the rated current, the circuit breaker automatically cuts off the circuit to prevent the wire from overheating and damaging the equipment.

Short circuit protection: When a short circuit occurs in the circuit, the circuit breaker can quickly cut off the current to avoid equipment damage and fire risk.

Under-voltage protection: When the voltage is lower than the set value, the circuit breaker will automatically disconnect the circuit to protect the equipment from voltage instability.

Isolation function: It can be used as an isolation switch for the circuit to ensure safety during equipment maintenance or inspection.

Scope of use

Industrial and commercial facilities: Used in power distribution systems to protect various electrical equipment and facilities.

Public buildings: such as office buildings, hospitals, shopping malls, etc., used to protect and manage power systems.

Data center: Provide high-reliability power protection to ensure the normal operation of key equipment.

Infrastructure: Provide power protection and management in large-scale power distribution places such as subway stations and airports.

The wide application of DW45 universal circuit breaker benefits from its high performance and reliability, and it is suitable for various occasions requiring power protection.

4.Normal working conditions

Ambient temperature: -5°C to +40°C, average temperature within 24 hours does not exceed +35°C.

Altitude: no more than 2000 meters.

humidity:

Relative humidity does not exceed 50% at maximum temperature +40°C.

Higher relative humidity is allowed at lower temperatures, for example up to 90% relative humidity at +20°C.

Condensation may occasionally occur due to temperature changes.

Pollution level: Pollution level 3.

Atmospheric conditions: There is no obvious dust, corrosive gas, flammable gas, steam or salt spray.

5.Installation conditions

1. Installation location: It should be installed in a place without severe vibration and impact, and the inclination of the installation site should not exceed 5 degrees.

2. Protection level: Select the corresponding protection level as needed, usually installed in a power distribution cabinet with a protection level of IP30 or higher.

3. Wiring: The wiring of cables or busbars should be firm and reliable to avoid loosening.

4. Installation method: Vertical or horizontal installation can be used, but the installation location must be ensured for easy operation and maintenance.

5. Ventilation conditions: The installation site should have good ventilation conditions to ensure that the circuit breaker can effectively dissipate heat during operation.

6. Electrical clearance: Ensure there is sufficient electrical clearance between the circuit breaker and other electrical equipment to prevent electrical interference and the risk of short circuit.