Dynamic Braking Unit

The LN series braking resistor units are often used with AC VFD's to produce a braking torque in the motor during overhauling conditions. The dynamic braking resistor is connected across the DC bus and will see voltages as high as 800 volts.They can divert the regenerative energy which is produced in the process of braking of the motor, into a braking resistor, converting that energy into heat.

The external design of the expansion modules is identical to the compact case of the LN series so that the installation can be performed easily in the switch cabinet next to the main module.

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Rated power: 7.5KW-132KW, based on 25℃ free air rating
Maximum braking current: 200A
Minimum resistance value: 3.8Ω( to R05 on request)
IP protection: IP00,IP20, IP23 or as required
Chopper voltage: DC660V±5V(Jump line), DC760V( to 1200V on request)
System voltage grade: 400V,
Terminal type:M4/M5/M8
ED(The efficiency of duty): 20%-80%,
Temperature Coefficients: 50,100 and 400ppm/℃ or as required
Operating Temperature:-55℃ to +65℃
Insulation Resistance: >1000MΩ (500V 25℃ 75% relative humidity)
Dielectric strength: >3.0KV 50Hz 1min(25℃ 75% relative humidity)
Safety: the tripping function against IGBT short circuit breakdown can avoid the fire caused by IGBT breakdown of resistor after overload running.
Wide compatibility: compatible with general resistance rather than non-inductive resistance if it is special design. Adjustable chopper voltage DC 630V-DC760V.
Economical feature: high ratio of performance to the rensonable price. Effective and practical for braking circuits of inverter's
Installation: It adopts a book-shape design and can be installed in parallel connection with zero clearance. It is recommended that up to 3 units can be connected in parallel.

Voltage range: 220V/400V/660V, suitable for all low-voltage frequency inverters (three phase asynchronous motor, permanent magnet synchronous motor).
Safty: using advanced power electronic technology and high-power IGBT as contactor, autotracking voltage, just need active resister, no need to use noninductive resister.
Economy: using high quality materials and a series of adapter power for inverters to choose. One machine can satisfy all need among the adapter power range in 400V.
Simple for operation, reliable and safe. Can be matched with all type of inverters.
Intelligent digital control pannel, using advanced electronic technologh and high-power IGBt AS SWITCH ACCESSORY, using PWM pulse width modulation technology, the output phase is accurated and it can prepress high order harmonic wave, using DSP CPU with high speed, high precision ,goods reliablility, strong anti-jamming ability. Force-air cooling, high over current capacity.
Long term high stability and wide compatibility for light duty
Simple connecting using a plug and can be installed in parallel.
Conformity with CE FCC
No configuration or commisioning required
Discharge resistor on board.

Simulation load testing, like generator, engineer, motor, etc
Automation control, braking circuits of low-wattage inverter's
Crane&elevator systems, various steel mill applications and transit applications.

Servo System