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Ohio Magnetics

Heavy-Duty DC Power Supplies

Lifting Magnet and Industrial-Strength Power Supplies

Ohio Magnetics’ DC Power Supplies for lifting magnets are available in both a fixed voltage output and a variable voltage output. Fixed Voltage output DC power supplies (usually 230 VDC or 115 VDC) are used in most general magnet applications. Variable Voltage supplies (usually 0-230 VDC or 0-280 VDC) are used in applications of fanning,
boost/carry, flux reduction, contant flux regulation and similar applications.

Voltage outputs can be set via potentiometers for voltage limit-current regulation or current-limit regulation.

Because the cold current of the magnet is 30%-50% greater than the operating current, the power supply must be sized for the cold rating of the magnet at 25°C.

(Note: Ohio also offers Low Voltage DC Power Supplies for smaller magnets.)

Features

• 120/240 V single phase AC input

• 12-120 VDC variable output voltage

• NEMA 12 (IP-65) enclosure natural convection

• North American or international input voltages; 3-phase; 50 or 60 Hz

• 480 V or 240 VAC input voltage; 3-phase; 60 Hz

• Magnetic line starter with 3-phase overload relay protection

• Adjustable taps on power transformers to match input line conditions

• Fast-acting fuse protection for diode bridge

• Transient surge protection

• DC output fuses for short circuit protection

• AC "power on" indicator light (neon)

• Wall-mounted enclosures to 10 kW; floor-mounted enclosures above 10 kW

• 110 / 120 V (North America) or 220 / 240 V (international) control voltage for input switching and operation of accessories

• 120 VAC control for input power switching

• Input and output power terminal blocks

• 120 V or 115 VDC output voltage (115 VDC output only to 25 kW)

• Modular diodes / SCRs for easy replacement

• Convection- cooled up to 6.5 kW (230 V) or 4 kW (115 V); fan-cooled above 6.5 kW (230 V) or 4 kW (115 V)

• Separate 230 V supply for controllers on all variable voltage supplies

Magnet DC Power Supply Specifications

For pricing information, please supply:

• Input Voltage and Frequency

• Input Line Equipment Desired (see options)

• DC Output Voltage

• Magnet Cold Current Rating at 25°C

• Enclosure IEC 529 Style

• Additional Options

• Quantity

(Note: Service, parts replacement and re-building are available on existing equipment. Call for cost-saving details!)

DC Power Supply Data for Fixed and Variable DC Power Supplies

^*: Add 12 in. (305 mm) to height for leg kit on floor-mounted models.

¹: On 0-280 V variable voltage output models, power output in kW is based on power delivered to load when voltage is set to 230 VDC.

Optional Features

• IP32, IP65, IP66 enclosures natural^* convection

• Latch lock on enclosures (where possible)

• 3-wire pushbutton “on/off” control or 2-wire selector switch type “on/off” control, both available as local or remote package

• Circuit breaker disconnect (local or remote)

• Variable voltage:

  • 0-230 V system for flux reduction, fanning, current/voltage regulation applications

  • 280 V systems for boost/carry, current/voltage regulation applications

• Power relay for operation of controller lift/drop coil from 110/220 V (North America) or 220/240 V (international) via pendant control

• Special requests available – please contact the factory

(*):

NEMA 1 = IP23

NEMA 3R = IP32

NEMA 12 = IP65

NEMA 4 = IP66

NEMA 4X = IP66