Intelligent molded case circuit breaker with undervoltage protection for rail transit, current 250A

Intelligent molded case circuit breaker with undervoltage protection for rail transit, current 250A

1 Scope of application

The rated insulation voltage of molded case circuit breakers is specified as 1000V, suitable for three-phase four wire direct grounding (TT) distribution networks with AC 50Hz, rated voltage 400V, and rated current up to 630A. Used to provide indirect contact protection; Prevent fire hazards caused by grounding fault currents due to equipment insulation damage; And it can be used to distribute electrical energy and protect against overloading and short circuits in power lines; It has a protective function against overvoltage, undervoltage, and phase loss in the circuit. Product compliance standards:
GB/T14048.2 "Low voltage switchgear and control gear";
GB/T22710 "Electronic Controllers for Low Voltage Circuit Breakers".

2 Main functions and features

Intelligent molded case circuit breaker with undervoltage protection for rail transit, current 250A

Adopting high-performance 32-bit ARM microprocessor for real-time signal processing and intelligent control.

LCD display in Chinese/English, user-friendly interface, easy to operate.

Long delay, short delay, and instantaneous three-stage protection, using electronic tripping, independent of power supply voltage, with high breaking capacity, ensuring the reliability of line short-circuit protection.

Overvoltage protection, undervoltage protection, phase loss protection, and zero loss protection.

Real time display of three-phase power supply voltage and load current.

The protection function and parameters can be set and modified online.

● Identification and display of trip types (lockout, short circuit, overload, undervoltage, overvoltage, loss of voltage, phase loss, zero break, etc.), which can be stored, queried, and deleted.

● Support remote signaling, telemetry, remote control, and remote adjustment functions

HPLC pluggable module and low-power Bluetooth wireless communication.

0.05In-1.2ln measurement can reach 0.5s level.

Real time measurement of active power, reactive power, apparent power, power factor and other parameters,

Accumulated three-phase active power,

● Time control, cost control and other modes are available for better flexibility in application

Supports DL/T645 protocol and Modbus protocol, and automatically recognizes them.

Real time monitoring of the temperature of the incoming and outgoing wiring terminals (optional).

● Support online remote upgrades for easy maintenance and upgrading of accuracy levels.

The accuracy of current and voltage can reach up to 0.5 seconds; The accuracy of active and reactive power can reach up to level 1.

● Support active power demand exceeding limit, reactive power demand exceeding limit, current sudden change event, interruption, voltage harmonic content, current harmonic content, voltage waveform distortion, current waveform distortion, and islanding protection.

● It has passive island protection.

● Equipped with terminal and contact over temperature protection

● Equipped with power generation quality monitoring and protection.

● Equipped with three-phase unbalanced monitoring and protection for power generation current.

● Possess self recognition of characteristic current physical topology.

3 Product models and meanings

4. Operating environment

The installation site should be free of conductive dust, corrosive gases, flammable and explosive gases, and no rain or snow invasion;

● Altitude ≥ 2000m;

The ambient temperature ranges from -5 ℃ to+40 ℃, with a daily average maximum temperature of ≤+35 ℃;

Relative humidity ≤ 50% (when the ambient temperature is+40 ° C);

The external magnetic field strength of the installation site shall not exceed 5 times that of the geomagnetic field in any direction,

The installation location should have good ventilation and heat dissipation conditions:

When HPLC (broadband carrier) communication is required, it is essential to ensure that all communication equipment operates under one transformer

5 Technical Parameters

6 Installation dimensions