Du/dt-limiting reactors
Function
ED3dU limiting reactors play a key role in protecting the insulation of motors supplied from PWM inverters. Their purpose is to limit the voltage rise rate (du/dt) generated by the converter output pulses, preventing winding damage and undesirable electrical overloads.
ED3dU limiting reactors play a key role in protecting the insulation of motors supplied from PWM inverters. Their purpose is to limit the voltage rise rate (du/dt) generated by the converter output pulses, preventing winding damage and undesirable electrical overloads.
These reactors are particularly effective in systems where:
- the length of motor supply cables is short,
- the switching frequencies of the inverter are relatively low,
- minimal yet necessary motor protection against the effects of converter pulse operation is required.
- preserve formatting, only translate to English They constitute a basic protective component that should be considered by the user to ensure durability and proper operation of the entire drive system.
Benefits
- Reduction of voltage rise rate (du/dt) at motor terminals
- Lower motor operating temperature
- Extended lifetime of winding insulation
- Motor protection while maintaining high control precision
- Reduction of disturbances caused by the inverter switching process
- More stable and safer operation of drive systems
Applications
- Heavy industry
- Renewable energy sources
- Power electronics and drive systems
- Power quality improvement systems
- Installations with PWM inverters requiring minimal du/dt filtering
Custom Design
Manufacturing a transformer with parameters other than those specified in the catalogue is possible upon prior consultation.
Typical application diagram
Special execution
Manufacturing a transformer with parameters other than those specified in the catalogue is possible upon prior consultation.
Download catalogue cards
Product for:
Details:
| Rated current | 6-2250 A |
|---|---|
| Rated voltage |
380-500 V |
| Rated frequency | 50/60 Hz |
| Switching frequency | ≥2kHz |
| Overload capability | 110% In (continuous) 160% In 1 min/h (momentary) |
| Cooling | AN – air natural |
| Ambient temperature | 40°C – land design 45°C – maritime design ≥50°C – heavy duty design or derating |
| Insulation class | F (155°C) |
| Winding material | Aluminium, copper |
| Standard equipment | NC temperature switch |
| Mounting | Standing, vertical |
| Degree of protection | IP00 |
| Standards compatibility | PN-EN 61558-20, PN-EN 60076-6 |
*- UL approved insulation system
