Three-phase dv/dt limiting reactor ED3du

Function
Limiting reactors are basic elements for motor protection. Insulation system of the motor is protected against high steepness of PWM voltage pulses generated by a frequency converter. ED3du reactors are the most effective with short to medium length of motor cables. They are the minimum necessary that the user should provide for the purpose of long, failure-free operation of the AC motor.

Benefits	Application
Reduction of the steepness of voltage rise dv/dt Lower motor temperature Prolonged motor life High control precision with simultaneous motor protection Limiting EMC disturbances caused by transistors switching	Drive systems with frequency converters AC motors with lowered insulation strength Motor cables of short to medium length

Typical application schematic

Special execution
Products with parameters exceeding the catalogue card can be made upon prior contact.

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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