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Tenfell
Closed tender
Published 08 Jun 2026

Rotary Frequency Converter

KBS Maritime Ltd · South East

Key facts

Estimated value
£2,000,000
Closing date
10 Jul 2026
Contract starts
10 Jul 2026
Contract ends
31 Jul 2027
Procedure
Restricted procedure
Buyer type
Central government

Description

We require a rotating machine manufacturer to design, build and install a 5MVA 11kV 50Hz to 6.6kV 60Hz Rotary Frequency Convertor. Both machines shall be synchronous with a mechanical coupling joining the 10-pole motor to the 12-pole generator. There is a requirement to be able to physically rotate the generator stator to enable manipulation of the phase and load angle via racking motor or actuator. The machine should come complete with a starting reactor and contactor connected to the neutral point of the motor, to limit the inrush current on startup to approximately 400A. Control of the machine starting reactor and racking equipment shall be by an external control system, which shall not form part of the machine scope of supply.

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