CXM1L series leakage circuit breaker
1. Product use and scope of application
CXM1L series residual current operating circuit breaker (hereinafter referred to as circuit breaker)，Mainly suitable for AC 50Hz，The rated operating voltage is 400V，Distribution network with rated current up to 800A，Used to protect people from indirect contact，It can also be used to prevent damage due to equipment insulation，Fire hazard caused by generating ground fault current，And can be used to distribute power and protect lines and power equipment overload and short circuit，It can also be used for the infrequent conversion of the line and the infrequent start of the motor。
The circuit breaker is suitable for isolation, and the symbol is
This product complies with GB/T14048.2-2008 "Low voltage switchgear and control equipment - Part 2: Circuit breakers" standard。
Two, CXM1L plastic shell type circuit breaker display
Conditions for normal use, installation and transportation
Normal service condition
The ambient air temperature does not exceed +40 ° C, and the average value within 24 hours does not exceed +35 ° C, and the lower limit is not less than -5 ° C。
Note: Circuit breakers used at ambient air temperatures above +40 ° C or below -5 ° C should be consulted with the manufacturer。
● The elevation of the installation site does not exceed 2000m。
The relative humidity of the atmosphere does not exceed 50% at +40 ° C of the highest ambient temperature。Higher relative humidity can be allowed at lower temperatures, such as up to 90% at +20 ° C。Special measures should be taken for condensation that occasionally occurs on the product due to temperature changes;
● Pollution level 3;
● In a medium without explosion risk, and the medium is free of gases and conductive dust sufficient to corrode metal and destroy insulation。
Normal installation condition
● Install in a place where there is no impact vibration and no rain or snow attack, and the inclination of the mounting plate and all directions does not exceed 5°;
● The installation category of the main circuit of the breaker is Ⅲ, and the installation category of the auxiliary circuit and control circuit that are not connected to the main circuit is Ⅱ;
● The external magnetic field near the circuit breaker installation site should not exceed 5 times the Earth's magnetic field in any direction;
● The electromagnetic environment for circuit breaker installation is environment B。
Four, circuit breaker type classification
● The models and their meanings are as follows
Shanghai People Electrical switch factory conventional models are:CXM1L-125,CXM1L-250,CXM1L-400,CXM1L-630
备注：
Only 4-pole products B and C have 240, 250, 218, 248, and 340, 350, 318, 348 specifications attachment code;
② Only CXM1L-400 and 630 chassis 4-pole products Type B and C have 260, 270, 268 and 360, 370, 368 specification attachment codes。
Classification of circuit breakers
● It is divided into two poles, three poles and four poles according to product level, of which two poles only provide CXM1L-125/2300 one specification。
● According to the wiring method, it is divided into three kinds: front wiring, back wiring and insert type;
● Divided into power distribution and motor protection according to use;
● According to the overcurrent release type of thermal moving-electromagnetic (compound) type, electromagnetic (instantaneous) type two;
● According to the remaining current segment time is divided into non-delay type and delay type two;
● According to the mode of operation, it is divided into: handle direct operation, motor operation (represented by P), rotating handle operation (represented by Z for switchgear).。
Five, main technical parameters
● This series circuit breaker Ui is 690V,Uimp is 8kV。The main technical parameters are shown in Table 3
● The remaining current action protection time of circuit breaker is shown in Table 4
● The overcurrent release device is composed of a thermal long-delay release device with inverse time-limit characteristics and an electrical release device with instantaneous action。
● Technical data of accessory devices
1，The ratings of alarm contacts for auxiliary contacts are shown in Table 6
2，The rated control supply voltage (Us) and rated operating voltage (Ue) of the control circuit releaser and motor are shown in Table 7
When the applied voltage of the shunt trip is between 70% and 110% of the rated control power supply voltage, it can reliably segment the circuit breaker.
When the power supply voltage drops to the range of 70% to 35% of the rated operating voltage of the undervoltage release，The undervoltage release device can reliably segment the circuit breaker.When the supply voltage is less than 35% of the rated operating voltage of the undervoltage release，The undervoltage release prevents the circuit breaker from closing;When the supply voltage is higher than 85% of the rated operating voltage of the undervoltage release，The undervoltage release ensures reliable closure of the circuit breaker。
Warning: The undervoltage release must be energized before the circuit breaker can be switched on and off, otherwise the circuit breaker will be damaged
The electric operating mechanism can reliably close the circuit breaker when the power supply voltage is between 85% and 110% at the rated frequency。
● Leakage alarm module
Specifications: P5-P6 input power supply is AC50Hz, 230V or 400V。
The contact capacity of P1-P2 and P3-P4 is AC230V 5A。
注意：1、Mode II is to meet the needs of special occasions, users should be carefully considered when using this function to protect electrical appliances。
2、For the circuit breaker with leakage alarm module, when the leakage alarm occurs, the reset button on the module must be reset, so that the circuit breaker leakage protection module can work normally。
Six, the main technical parameters
● Circuit breaker dimensionsThe installation dimensions are shown in Figure 2 and Table 8
Key words: Shanghai People Electrical Switch Factory,CXM1L-125,CXM1L-250,CXM1L-400,CXM1L-630,CXM1L plastic-case leakage circuit breaker
Vii. Instructions for ordering
The order must state:Product name, model, specification, number of poles, blurting mode and name, protection characteristics, rated current, rated remaining operating current, order quantity。
例如：CXM1L-250, four pole B type distribution protection circuit breaker, multiple release, rated current 225A, rated residual current 100mA, a total of 100 sets。
Should read:CXM1L-250/4300B 225A 100mA 100 PCS。
If the user has special requirements for the circuit breaker, the contract can be signed only after consultation with the technical department。
