Use and scope of application

Grid-power grid (E-type), grid-generator (F-type each required, automatic, manual compatible.

Undervoltage, overvoltage, phase failure, overload, short circuit protection, remote interface with fire protection, communication interface, full-featured.

One-piece, split-type is optional.

Two poles, three poles, four poles, high breaking, general breaking, complete specifications.

The operating parameter setting is adjustable, and the LCD displays the full Chinese menu operation.

Rated voltage 400V, rated current 10A-1250A.

It complies with the standard GB/T 14048.11-2016 national compulsory product CCC certification.

Model meaning

The main technical parameters

Electrical level: CB level (ie, the main contact of the circuit breaker can be connected to the breaking short-circuit current and equipped with an overcurrent release);

Use category: AC-33B (typical use: motor load, resistance and sub-blade load below 30%).

Rated working voltage: line voltage ~400v,

Rated frequency: 50Hz:

Undervoltage protection setting range value: 150V-180v adjustable; 1V step difference, factory setting 150V.

Undervoltage resumes normal value: undervoltage value +25V.

Overvoltage protection setting range value: 240V-280V adjustable; step difference 1V, factory setting value 280V.

Overvoltage recovery normal value: overvoltage value -10V.

Trip delay time: 1.2-60s adjustable: 1s step difference, factory set value 1.2s (1.2s display 12, 60s display 600)

Closing delay time: 1.2-60s adjustable, 1s step difference, factory setting 1.2s (1.2s display 12, 60s display 600),

Generator start delay time: 10s.

The voltmeter display accuracy: 2.5.

Note: The undervoltage value, overvoltage value and voltage supply of each phase are the voltage between the phase and the neutral line.

Error indication when writing E2ROM (eg EEPROM not soldered, damaged pen)

Save correctly

Automatically converts normal work display after 1 second

Performance characteristics

The NMQ2-Y/K series dual power automatic transfer switch has perfect detection and protection functions. It uses a high-speed single-chip embedded microprocessor as the main control chip to detect the power supply status of the power supply in real time, ensuring high-reliability operation of the power supply system.

It has double protection functions of mechanical interlock and electric interlock to prevent the two circuit breakers from closing at the same time.

There are six kinds of control operation methods: “manual control”, “self-return self-recovery”, “common power supply”, “backup power supply”, “power-off and re-deduction”, and “self-return without self-recovery”.

It has under voltage, over voltage and lack of equal protection functions to prevent faulty power supply from supplying power to the load.

Alarm or indication function with power failure, circuit breaker trip, etc.

It has the function of preventing secondary reclosing: (ie, after the load side is short-circuited, overloaded, and the breaker is automatically closed (tripped), it cannot be automatically closed by itself).

It has adjustable running parameter values (undervoltage value, overvoltage value, opening delay value, closing delay value), LCD displays two phase voltages at the same time; full Chinese menu operation, convenient for users to query in real time.

With fire interface, in case of emergency, as long as the fire control DC24V is connected (the control voltage is selected by the user), the controller will immediately output a control contact to quickly cut off the relevant circuit.

With RS485, RS232C serial communication interface, application MODEBUS communication protocol.

Installation method and shape installation size