ED3N / ED3S / ED3dU — line, motor and du/dt reactors for frequency converters
Country: Poland · Model: ED3N / ED3S / ED3dU
Three-phase low-voltage reactors for drives with frequency converters. The line reactors ED3N take up to 1 250 A at 400 V, the motor reactors ED3S and du/dt reactors ED3dU 6–2 250 A at 380–500 V. The former are installed at the input, the latter at the output of the converter.
- ED3N (line)
- 400 V, 4 % Un, up to 1 250 A, 50 Hz
- ED3S (motor) and ED3dU (du/dt)
- 6–2 250 A, 380–500 V, 50/60 Hz, switching frequency ≥ 2 kHz
- Overload
- 110 % continuous; 160 % 1 min/h
- Cooling
- AN
Technical specifications
| ED3N (line) | 400 V, 4 % Un, up to 1 250 A, 50 Hz |
|---|---|
| ED3S (motor) and ED3dU (du/dt) | 6–2 250 A, 380–500 V, 50/60 Hz, switching frequency ≥ 2 kHz |
| Overload | 110 % continuous; 160 % 1 min/h |
| Cooling | AN |
| Insulation class | F (155 °C) |
| Windings | aluminium, copper |
| Protection | IP00, class I; NC temperature sensor |
| Standards | PN-EN 61558-2-20, PN-EN 60076-6 |
Replacement for
no direct GOST analogue; closest — 0.4 kV line and motor reactors for frequency converters (general type)
selected by purpose and main parameters, please confirm with the manager
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The ED3N line reactor increases the impedance at the connection point. The current drawn by the rectifier has a lower THDi and a lower RMS value, and the amplitude and steepness of pulses during transients are limited, so the rectifier semiconductors are protected. A reactance of 4 % is recommended for drives without a DC link choke. The ED3dU limit the voltage rise rate at the motor terminals and give basic protection with short cables and low switching frequencies. The ED3S have higher inductance, compensate cable capacitance better, suppress overvoltage and interference, and are recommended for medium-length cables and motors sensitive to overvoltage. The motor runs cooler, the insulation lasts longer, and noise is lower. The switching frequency must be not lower than 2 kHz, and overload is 110 % continuous and 160 % for 1 minute per hour. Cooling is natural, ambient temperature 40 °C (onshore), 45 °C (marine) or from 50 °C (special version), insulation class F, aluminium or copper windings, NC sensor. The magnetic cores are made using multi-gap core technology, the protection rating is IP00, protection class I, with compliance to PN-EN 61558-2-20 and PN-EN 60076-6.
How to choose
The reactor is chosen by installation location. At the drive input the ED3N is taken, and for drives without a DC link choke a reactance of 4 % is advised. At the output the ED3dU is used when the cable is short and the switching frequency low. If the cable is of medium length or the motor is afraid of overvoltage, the ED3S with higher inductance is needed. The current is selected by the converter rating within 6–2 250 A. For long cables and high-speed motors there is the EF3LC sine filter.
Request a price and lead time
ED3N / ED3S / ED3dU — line, motor and du/dt reactors for frequency converters. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does the ED3S motor reactor differ from the ED3dU du/dt reactor?
The ED3dU only limits the voltage rise rate and suits short cables. The ED3S has higher inductance, compensates cable capacitance and limits overvoltage and interference.
What is the ED3N line reactor needed for?
It reduces the THDi of the consumed current, limits the amplitude and steepness of pulses and protects the rectifier semiconductors. The catalogue card covers up to 1 250 A at 400 V.
What current and voltage are ED3S and ED3dU made for?
Rated current 6–2 250 A, voltage 380–500 V, frequency 50/60 Hz, switching frequency not lower than 2 kHz.
What reactance does a line reactor for a drive without a choke have?
For drives without a built-in DC link choke, reactors with a reactance of 4 % are especially advised.
What overload do the ED3S and ED3dU reactors withstand?
110 % continuous and 160 % for 1 minute per hour. Protection rating IP00, protection class I.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.