Open tender · Notice 085988-2026
UKRI-6064 ISP-1157 Replacement of Large ISIS Power Supply System
- Value
- £3m
- Closes
- 23 Nov 2026 (15 days)
- Where
- South East
- Lots
- 1
- Suitable for SMEs
- Yes, says the buyer
- Contract
- 12 Mar 2027 – 12 Feb 2029
In plain English
UKRI's ISIS Neutron and Muon Source at STFC wants a replacement 1200 kVA three-phase AC magnet power supply system, including a control system that holds the magnet load current to a set point with high stability. The contract runs from March 2027 to February 2029 and is valued at around fffffffc2a33 million.
Good fit for: Specialist power electronics manufacturers building high-precision, high-power AC supplies.
- Equipment must be intrinsically safe by design and fully compliant and marked with the relevant standards
- Tight technical tolerances, including 0-250 V line-neutral output at fffffffc2b150 mV accuracy
- Must work with a facility-supplied DCCT -10/+10 V load current signal
Written with AI from the official notice. Check the notice before relying on it.
What the buyer says
The ISIS Neutron and Muon Source Facility, part of UKRI’s Science and Technology Facilities Council, are looking to procure a replacement three-phase Alternating Current (AC) Magnet Power Supply System to make up the losses in a resonant magnet circuit. The requirement is for a modular 1200 kVA three-phase AC voltage source power supply that includes a control system capable of regulating the designated magnet load current to a given setpoint and to a high level of stability. It is important to emphasise that the magnet load current to be regulated is not the same as the AC power supply output current and the measurement signal for the load current will be provided by the facility in the form of a DCCT with a -10/+10 V signal representative of the load circuit current. The three-phase output shall have a variable voltage output from 0 V to 250 V line-neutral and an output voltage accuracy of ±50 mV. The system shall be fed from a nominal 400 Vrms AC, 3-phase 50 Hz sinusoidal supply, intrinsically safe by design, with high efficiency, high reliability, high maintainability and fully compliant and marked with relevant standards.
Getting the documents
ukri2--prospend.vf.force.com (linked from the notice).
Procedure: Open procedure (Open: anyone can bid, in one stage). Published 10 Sep 2026.
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