The XM3L series intelligent residual current circuit breaker adopts advanced numerical control technology to protect the motor from faults such as short circuit, locked rotor, overload, underload, and leakage, and has functions such as measurement, operation control, diagnosis and maintenance, alarm output, etc; This device has powerful functions and is versatile. It can replace ammeters, current transmitters, thermal overload relays, time relays, leakage relays, etc. The human-machine interface is clear, with good operability and high detection accuracy, ensuring the accuracy and reliability of actions.
Suitable for industrial motors and three-phase power feeding systems in chemical, petrochemical, building materials, metallurgy, municipal, environmental protection, and power industries.
Model and its meaning

main features
Adopting high-performance, low-power digital circuits with high computing speed and stable performance.
The overall mold has a small volume and is easy to install.
Using digital processing technology, it has high measurement accuracy, good linearity, fast fault diagnosis speed, and is precise and reliable.
High definition LED display, with intuitive and convenient parameter settings and fault display.
One machine is versatile and can replace ammeters, current transmitters, thermal overload relays, time relays, leakage relays, etc.
Technical Parameter
Rated working voltage Un: AC220V 50Hz/AC380V 50Hz
Rated working current le: can be set arbitrarily within the allowable range shown in the table below.

● Overcurrent protection function
The rated operating current value can be set arbitrarily within the 'rated protection current le setting range' in the table above.
The factory default is ln overcurrent inverse time limit protection curve code: 1-6 can be set.
When the current value is greater than the overcurrent protection setting value, the protection device operates according to the action characteristic curve.
Delay action schedule for overcurrent inverse time limit fault:

Note: lw in the table represents the working current, and ln represents the rated operating current.
● Locking protection:
When the operating current of the motor is greater than 5 times the rated protection current Ie, the protection device will operate within 1 second.
● Short circuit protection:
When the operating current of the motor is greater than 8 times the rated protection current Ie, the protection device will operate within 1 second.
● Leakage protection:
The leakage protection value can be set between 20~999mA, and the factory default is 100mA. When the leakage current value is greater than the set value, the protection device will operate within 1 second.
● Phase interruption/loss protection:
When the motor is running, if one or both phases have zero current, the protection device will activate within 1 second.
● Fault shielding words:

● Electrical parameters/climatic conditions

major function
Function settings: Rated protection current le, overcurrent curve code, leakage action current, and fault shielding mode control word can be set.
Protection functions: phase failure protection, overcurrent reverse time limit protection, locked rotor protection, short circuit protection, leakage protection.
Display function: cycle or directional display of phase A, B, C current, leakage current; Press the button to query the fault record data; Press the button to display the setting parameters.
Fault recording function: It can continuously record the latest 10 fault states and fault data.
Operating instructions
◇ Parameter settings
Press the 'Settings' button continuously for 3 seconds, all indicator lights will light up, and the digital display will show the serial number shown in the' Parameter Settings Table '.
Operate the buttons to set parameters.
Among them, the 'setting key' selects operation items in ascending order according to the 'parameter setting table'
Modify the data of the flashing bit with the 'data key' (press the number once plus 1, cycle from 0 to 9)
The 'shift key' flashes to select the data bit to be modified
The 'reset button' saves the set parameters and exits the parameter settings, putting it into normal monitoring mode.
● Parameter Setting Table

◇ Parameter query
Press the 'Settings' button, the parameter indicator light will turn on, and search for parameters according to the serial number shown in the' Parameter Settings Table '.
Among them: "Data key" incrementally selects parameter number
Shift key "decrements the selection parameter number
Reset button "exits parameter query and enters normal monitoring state.
When there is no button operation within 20 seconds, it will automatically exit the "parameter setting" state.
Real time data display
The digital tube displays the current real-time three-phase current value and leakage current value in a loop.
When a fault occurs, the LED displays the fault status and the digital display shows the fault data. When multiple faults occur simultaneously,
The digital tube displays various fault states and fault values in a loop at intervals of seconds.
Display

Installation and wiring
Wiring diagram
The product appearance and installation dimension diagram are the same as XM1
Schematic diagram of external terminal connection:
precautions
The installation environment should comply with the requirements of GB13955-2005 for low-voltage power grids.
After the leakage protector is put into operation, a leakage test should be conducted at least once a month and experimental records should be kept.
This product does not provide protection against contact leakage between phases or between phases.