TDK B86301U0180S000 180 A dv/dt Output Reactor, 520 V AC

A motor-side reactor that tames voltage rise at the drive output

The TDK B86301U0180S000 is a three-phase dv/dt output reactor rated 180 A at 40 C on 520 V AC. It is fitted between a frequency converter and the motor to reduce the steepness of the voltage edges produced by the inverter, which lowers the voltage stress on the motor winding and cable. According to the datasheet it reduces voltage stress at the motor, is optimised for motor cables up to 50 m, and is intended for converters with output frequencies from 0 to 400 Hz.

The 180 A code is the first busbar-connected size of the B86301U series. Below it the series uses finger-safe terminals (8, 12, 24, 45 and 112 A); from 180 A to 1500 A the terminals are busbars and the protection degree is IP00, which means the reactor is meant to be built into an enclosure.

Datasheet values for the 180 A reactor

Selecting the output reactor

Two numbers decide whether this code suits a drive: the maximum pulse frequency and the cable length. The datasheet gives 6 kHz as the limit for the 180 A to 320 A group, against 16 kHz for 8 to 24 A and 10 kHz for 45 A, so a drive running at 8 kHz or higher needs a different unit or a lower switching frequency. The motor cable limit of 50 m is stated as a guideline, with the actual permissible length depending on the application, and must be checked.

• Match rated current to drive output current, with margin for the 40 C reference temperature.
• The relative voltage drop of 0.78 % is small compared with a line reactor.
• The 250 A (B86301U0250S000) and 320 A (B86301U0320S000) types share the 6 kHz limit and the 20 x 3 or 30 x 3 busbar style.
• If cable lengths exceed the guideline, or the motor is old, ask the drive and motor makers about sine filters as an alternative.

Installation notes

With IP00 the unit must be mounted where nobody can touch live or hot parts. TDK warns that components can become very hot in operation and remain hot after switch-off, that the output frequency of the converter must stay in the specified range to avoid resonance and uncontrolled warming, and that the component temperature must be protected against exceeding its limit. Use only the fixing holes provided and keep any tension or pressure off the busbars. Only qualified persons should install it.

Typical GCC uses

Large pump and compressor drives in oil and gas and water plants, where the motor sits far from the drive room, are the classic case for dv/dt reactors to limit stress on motor insulation. Check the cable length in your installation against the 50 m guideline and the enclosure temperature in outdoor kiosks. See other drive-panel components in the electrical and power category.

Selection and installation notes

An EMC filter or reactor is selected from the rated current at the actual ambient temperature, the supply voltage and the drive or load it serves. Fit it as close as possible to the drive input, keep the cable between filter and drive short, bond the housing to the panel back plate with a clean metal contact, separate input and output cables, and check the leakage current against the protective earth requirements of the installation.

Information needed for a quotation

Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Frequently asked questions

What does a dv/dt output reactor do?

It reduces the rate of voltage rise at the converter output so that motor insulation and cable are less stressed. The datasheet lists a maximum dv/dt of 8 kV/us at the filter input.

What is the maximum pulse frequency for this code?

6 kHz for B86301U0180S000, as listed in the characteristics table.

How are the terminals made?

As busbars, 20 x 3 mm, and the protection degree is IP00 for the 180 A to 1500 A types.

What cable length is it optimised for?

Motor cables up to 50 m; the permissible length depends on the application and must be checked.

Who supplies this part in Oman?

Seven Star LLC is an independent supplier in Muscat and not the manufacturer. Confirm pulse frequency and cable length before ordering.