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Overview
Essential details：GV7-RS150 Thermal magnetic motor circuit breakers Schneider
In the article “How to interpret the motor protection circuit breaker”, we have actually simply compared the difference between the two, this article will be from the characteristics of the protection object, the circuit breaker itself protection characteristics and the principle of phase loss protection, temperature reduction and other aspects of the comparison, to facilitate the majority of engineers to understand the difference between the two.
Let’s first understand Schneider’s several low-voltage circuit breakers, GV2/GV3/GV4 in Figure 1 is a typical motor protection type circuit breaker, with thermal magnetic protection and single magnetic protection two kinds of release.
GV7-RS150
Whether NSXm/NSX MCCB is suitable for Motor protection or distribution protection depends on the type of electronic trip unit, such as Micrologic 2.2/2.3M and 6.2/6.3E-M trip units are motor protection type (M stands for Motor). With long delay protection, short delay protection, instantaneous protection, ground fault protection (only 6.2/6.3E-M), Micrologic 1.3M and MA only have instantaneous protection (magnetic protection), only to provide short circuit protection for the motor.
The Acti 9 microbreak and MT/MTZ frame circuit breakers in Figure 2 are typical distribution protection circuit breakers, the former is suitable for the end of the distribution line such as the home power circuit, the latter is suitable for the beginning of the line such as the low-voltage side of the distribution transformer. The release of NSXm/NSX distribution circuit breakers includes thermo magnetic TMD and electronic Micrologic 2.2/2.3/5.2/5.3/6.2/6.3 (without the suffix M).
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Superiority products GV7-RS150 Thermal magnetic motor circuit breakers Schneider
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