YDSM1 molded case circuit breaker ( hereinafter referred breaker ) , rated insulation voltage of 690V, suitable for AC 50Hz, rated working voltage 400V and below , rated current up to 800A for frequency conversion and infrequent start motor with . Breaker with overload, short circuit and under voltage protection function, can protect the circuit and power supply equipment from damage .
Breaker according to its rated ultimate short-circuit breaking capacity (Icu) level , divided into L -type ( standard type ), M -type ( high breaking type ), H -type ( high breaking type ) categories. The circuit breaker has small size , high breaking arcing short ( part of the specification zero arcing ) , anti- vibration features, is ideal for land and marine use.
● The circuit breaker can be installed vertically ( ie, vertical loading ) , can be installed horizontally ( ie, transverse) .
● The circuit breaker can not be poured into the line, that can only be connected to power lines 1,3,5 , 2,4,6 then load line .
● The circuit breaker with isolation , symbols marked as : .
● The circuit breakers perform the following criteria :
IEC60947-2 and GB14048.2 Circuit Breakers
IEC60947-4 and GB14048.4 contactors and motor starters
IEC60947-5.1 and GB14048.5 Electromechanical control circuit devices
● Altitude 2000m and below;
● The ambient temperature is not higher than +40 ℃ (for marine products is +45 ℃) and not lower than -5 ℃;
● able to withstand the impact of moist air;
● can tolerate salt spray, mist impact;
● can withstand the impact of mold;
● The maximum inclination of ± 22.5 °;
● when subjected to normal ship vibration can work reliably;
● In the case of the earthquake (4g) can work reliably;
● In the absence of explosive medium, and medium without enough to corrode metal and damage the insulation of gas and conductive dust place;
● In the absence of rain and snow. Pollution degree 3;
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