CXM1LC reclosing protects circuit breakers
First, the use of CXM1LC
CXMILC residual current operating circuit breaker (hereinafter referred to as circuit breaker) is a circuit breaker that integrates residual current relay, contactor and plastic-case circuit breaker，Suitable for three-phase four-wire neutral ground power supply system，Protection against connection faults, overcurrent, short circuit, phase deficiency and overvoltage of lines or electrical equipment，It can also prevent electrical fire and electrical equipment damage caused by electrical wiring or electrical equipment grounding fault and provide contact protection against human horn insect electrical danger。The product conforms to GB148.2-2008, GB/T22387-2008 standard。
CXMILC residual current circuit breaker overcurrent release is electronic. The rated current of the circuit breaker can be adjusted according to the line load, and the section protection curve can be adjusted. It can cooperate with the lower circuit breaker to realize the classification of households。The electronic overcurrent changer has high protection accuracy and is less affected by ambient temperature and installation position. It is an upgrade product of the thermal overcurrent release device。
The CXMILC residual current circuit breaker is equipped with RS485 serial interface, which can set the protection characteristic parameters through the programmer, and can meet the requirements of communication networking。
Second, circuit breaker type classification
●CXM1LC reclosing protection circuit breaker model and its meaning
Shanghai People Electrical switch factory conventional models are:CXM1LC-125,CXM1LC-250,CXM1LC-400, CXM1LC-630。
Third, product characteristics
● The ambient temperature is between -5℃ and +40℃, and the altitude is not more than 2000 meters。
● Relative air humidity: ≤ 50% (ambient temperature +40℃)。
● The external magnetic field of the installation site does not exceed 5 times the geomagnetic field in any direction, and the product is near to avoid large electromagnetic interference (such as high-power motor or inverter), no explosive, flammable, corrosive gas, no rain and snow attack, should be dry and ventilated。
● Pollution level: Level 3;Installation category: III
Four, the main technical indicators
●Symbol specification
●Protective characteristic
●The main prime number parameters
Fourth, residual current protection function
●Set the working mode
Leakage current alarm value: greater than or equal to 0.61An
Action time
●Automatic tracking mode
Automatic tracking shift conditions: Down gear: less than 0.51△n for 2 minutes;Up-shift: greater than 0.51△n for one minute。In the automatic tracking mode, the initial power-on operation is at the highest remaining current gear。When the shift "down" condition is met, that is, the actual remaining current is less than 0 of the value of the next gear.5 times and for 2 minutes, the gear is automatically adjusted to the next gear: if the gear is full。
When the full gear is "up" condition, that is, the actual remaining current is greater than 0 of the gear value.5 times and for 1 minute, the gear will be shifted to the upper gear。At a certain gear (except the highest), when the residual current is greater than 0.751△n, switch delay after the action of opening, re-closing after the remaining current gear up to the upper gear。
●Reclosing/locking
Leakage reclosing function on: leakage action time is set to 0.5s gear (open by default);
Leakage reclosing time: 20S-60S。
Lockout time: 5s。That is, when the leakage fault occurs again within 5s after reclosing, it is delayed tripping
The rear controller enters the lock state and does not reclosing。
Five, communication function
According to the specified communication protocol, it can realize the functions of telemetry, remote control, remote adjustment and remote communication。
Communication parameter
The DI input can be used as a common control input, can also be set as an alarm or fault input or other logical state input, the function is programmable。
6. CXM1LC outline and installation dimensions
Key words:Shanghai People Electrical Switch Factory,CXM1LC-125,CXM1LC-250,CXM1LC-400, CXM1LC-630,CXM1LC reclosing protection circuit breaker,
