Use and scope of application

NMDW1 series intelligent universal circuit breaker (hereinafter referred to as circuit breaker is suitable for AC 50Hz, rated voltage 400V, 690V, rated current is 630A-6300A, mainly used in distribution network to distribute power and protect lines and protect power equipment from Hazard of overload, under voltage, short circuit, single phase grounding, etc. The circuit breaker has a variety of intelligent protection functions, which can achieve selective protection and precise operation, avoid unnecessary power failure, improve power supply reliability, and open The communication interface can be used to meet the requirements of the group center and the automation system. The circuit breaker has a pulse withstand voltage of 8000V at an altitude of 2000 meters (the standard calibration of different altitudes is up to 12000V). The circuit breaker does not have intelligence. Controller and emotion device can be used as isolators, marked as “”

Futai standard: has passed the national mandatory CCC certification

GB14048.2 "Low-voltage switchgear for low-voltage switchgear and control equipment" and IEC60947-2 "Low-voltage switchgear and control equipment breaker" and other standards.

Model meaning

Functional classification

▲Classified by installation method

a. Fixed

b. drawer type

▲ according to the number of poles: three poles, four poles

▲ according to the operation method

a. Electrically operated

b. Manual operation (for maintenance and maintenance)

●Retractor type

Intelligent controller, undervoltage instantaneous (or delay) trip unit, shunt trip unit.

●Intelligent controller performance:

a. The intelligent controller is divided into: H type (communication type), M type (general intelligent type), and most commonly used type L (economic type);

b. With overload long delay inverse time limit, short delay inverse time limit, time limit, instantaneous function. The protection characteristics required for the composition can be set by the user;

C. Single phase ground protection function;

d. Display function: setting current display, action current display, voltage display of each phase (voltage display should be made at the time of ordering);

e. Alarm function: overload alarm;

f. Self-test function: overheating self-test, microcomputer self-diagnosis;

g. Test function: Test the action characteristics of the controller.

Note: When ordering, please indicate that the function is not with undervoltage and the control voltage is 220V or 380V.

Technical Parameters

Installation size, dimensions and mounting pitch