NLDW1-2000~6300 series intelligent universal circuit breakers (hereinafter referred to as circuit breakers) are suitable for AC 50Hz distribution networks with rated voltage of AC400V/690V and below, and rated current ranging from 200A to 1600A. They are mainly used to distribute electrical energy, and protect circuits and power equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. Under normal conditions, it can also be used for infrequent switching of lines. The circuit breaker has intelligent protection function, precise selective protection, can improve power supply reliability and avoid unnecessary power outages. At the same time, it has an open communication interface and can be used for "four remotes" to meet the requirements of the control center and automation system.

Compliant standards: GB/T14048.2, IEC60947-2.

◻Classification:

Classified by installation mode

a. Fixed type

b. Draw-out type

Classified by number of poles: three poles, four poles

Classified by operation mode

a. Electrical operation

b. Manual operation (for maintenance and repair)

◻Release type:

Intelligent controller, undervoltage instantaneous (or delay) release, shunt release.

◻Intelligent controller performance:

a. Intelligent controllers are classified into: M-type, 3M type, H-type, 2H type and 3H type;

b. It is equipped with overload long delay inverse time limit, short delay inverse time limit,definite time limit, instantaneous function, which can be set by the user to form the required protection characteristics;

c. Single phase grounding protection function;

d. Display function: setting current display, action current display, and voltage display of each phase (voltage display should be proposed when ordering);

e. Alarm function: overload alarm;

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

g. Test function: it tests the action characteristics of the intelligent controller.

Note: The breaking capacity in the table is the same for the upper and lower incoming lines