How to Contact Us
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Omiran Limited
Springvale
Police Station Square
Mildenhall
Suffolk. IP28 7ER
UK
Tel: +44 (0) 1638 716 748
Fax: +44 (0) 1638 716 779
Design:
- Up to 200 A (or approx. 2.5 kW) table-top cases or plug-in units
- Units with higher current or power are supplied as 19" cabinets with castors. The side walls can be removed and the rear door can be locked
- All cabinets have removable crane-eyes
- Racks with 600 mm width, and larger, are suitable for fork lift transport
Cooling:
- Up to approx. 1000 A (or approx. 5 kW de-energizing power), air cooling. For higher currents, or higher powers, water cooling with thermostatic valves for the control of the water flow is used (depending on the power)
Output isolation:
- The output is floating. Operating voltage with respect to earth: for air cooled units max. ±300 V DC. For water cooled units max. ±100 V DC.
Output terminals:
- Up to 100 A, clamps on the rear. For higher currents the outputs are bolts or copper bars.
Technical Data:
- Mains connection: Up to approx. 200A nominal current or approx. 1000W: 230 V ±10% 47 Hz to 53 Hz; For higher current or power: 400 V ±10% 47 Hz to 53 Hz 3-phase
- Ambient temperature: 0°C to +40°C
All the following data are sample values and depend upon the actual specification.
(For explanations please refer to the Terms & Definitions page)
- Setting range for current: from approx. 0.1% to 100%
- Setting range for voltage: from -100% to +100%
- Reproducibility: ±1 x 10-4 to ±1 x 10-6
- Setting resolution (potentiometer): 1 x 10-3
- Residual ripple (Voltage): approx. 1 x 10-3pp
- Residual ripple (Current): ±1 x 10-4pp to ±1 x 10-6pp depending upon the inductance of the load
- Run-up time: from 1 sec. to 100 h
- Deviation:
for ±10% mains voltage variation: <± 1 x 10-5
for no load / full load: <2 x 10-4
over 8 h under constant conditions: <±1 x 10-4 to ±1 x 10-5
within the temperature range: <±1 x 10-4 to ±5 x 10-6 / K
Available Options:
- Analogue programming
- Analogue programming, floating
- DVM with higher resolution
- Computer interface - USB, IEEE 488, RS 232, RS 422, Ethernet (LAN), Profibus (DP)
- Higher stability
- Current control by electronic ramp with digital control; rise and fall times are adjustable manually or via computer interface
- Current limit setting either manually or via computer interface. Resolution up to 1 x 10-5 for external setting
- High speed turn-off input with adjustable threshold
- Quench detector to monitor the magnet
- Fast de-energizing in the event of quench or mains failure: A DC conductor or a semiconductor switch disconnects the power supply from the magnet. De-energization takes place with a power resistor, actuated at quench, or via an external circuit
- Short circuit switch (Current source 100mA for heating a sector of the superconducting circuit)
- Water cooling
Further options and customer specific solutions on request.
Advice or Questions?
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If you have any questions concerning either our products or services, or simply want advice on how to best solve your particular problem, please don't hesitate to contact us.
Additional Information
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DC Power Sources
The NTS family of Power supplies are designed specifically for use in superconducting Magnet applications.
The power supply design is based upon a series regulator stage, comprising a set of parallel transistors, which is driven from a pre-regulator stage utilizing phase controlled thyristors. This design means that the power lost across the output transistors is reduced to a minimum and thus the final control stage always has a low power dissipation - both when energizing the magnet as well as during static constant current operation.
During magnet de-energization the transistor stage operates as a current sink and the power is dissipated by means of either air or water cooling.
Superconducting Magnet Power Supplies - Up To > 10 kA / 65 V
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