Use and scope of application

NMB1-□80R automatic reclosing miniature circuit breaker (hereinafter referred to as circuit breaker), suitable for AC 50Hz, rated working voltage to 400V, rated current to 80A, long-distance automatic closing and opening control of line Or the automatic signal control closing, opening, and the effect of overload and short circuit protection on the line can also be used as the infrequent operation conversion of the line. At present, it is widely used in conjunction with IC card prepaid meter to control the disconnection of lines, occasions where personnel are difficult to access, occasions where maintenance personnel cannot be in place, unattended occasions, and occasions where power supply continuity is high. .

In line with the standards: GB10963.1, IEC60898-1, with international advanced level.

Model and meaning

Structural features

◆The circuit breaker has automatic reclosing and opening device, which has the following characteristics:

◆All poles have over current protection and short circuit protection;

◆rated segmentation capacity up to 10KA;

◆The circuit breaker operating mechanism is a free-locking mechanism with energy storage type. The contacts are quickly closed and fast segmented, and the circuit breaker is overcome.

◆In the process of automatic reclosing and automatic opening, the adverse effect caused by the speed of the handle is greatly improved, and the product is greatly improved.

◆Service life; in normal working conditions, the contact can only stay in the closed or open position;

◆Automatic reclosing and opening device, composed of thyristor, integrated chip, motor and gear to form the driving component;

◆The shell and parts are made of high flame retardant, high temperature resistant and impact resistant plastic.

Normal working conditions and installation conditions

◆ Ambient temperature: -25 ° C ~ +60 ° C;

◆ Altitude: The altitude of the installation site does not exceed 2000m;

◆Installation category: II, III;

◆Installation method: Install with TH35-7.5 steel mounting rail.

Technical Parameters

Main specifications:

◆ rated current In: 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, B0A;

◆ pole number: 1P+N, 2P or 3P+N, 4P.

The main technical parameters:

◆ Instantaneous trip type: C type

◆Rated working voltage Ue: 230V (1P+N, 2P), 400V (3P+N, 4P);

◆ Rated short-circuit capability lcn, running short-circuit segmentation capability lcs (see Table 1).

Shape and installation dimensions