Unregulated Power Supplies

5A ac/dc

Simultaneous use of ac and dc up to 5A continuous. Short term current up to 7A. Safety features include a keyswitch which inhibits voltages above 6V. Housed in a rugged steel case.

2 models - the 2-12V has a push button reset and the 1-12V has an internal, solid state cut-out.

5A ac/dc 2-12V, 2V steps         £87.40

5A ac/dc 1-12V, 1V steps         £97.00

6A ac/dc Keylock                    £103.00

Voltage selection is via a removable key - the key is a common profile type allowing one key to operate all the power supplies. 2, 4, 6, 8, 10, 12V ac and 1, 3, 6, 8, 11 and 13V capacitor smoothed dc. Simultaneous use of ac and dc up to 6A continuous. Sophisticated overload/short circuit trip which isolates the output under fault conditions and gives an audible/visual alarm.

8A ac/dc 2-12V                  £115.00

A solid general purpose power supply giving 2, 4, 6, 8, 10 and 12V ac/dc at up to 8A continuous. Apart from our standard automatic short circuit protection, the unit contains a unique electronic locking system. By inserting a screwdriver into a slot on the underside of the case, the maximum available output voltage may be limited. The maximum output is clearly displayed on a bank of leds on the front panel. ac or dc is available through two pairs of terminal posts - ac/dc selection is made via a removable key.

 

8A ac/dc 1-24V                  £175.00

This rugged unit offers voltages between 1 and 24 volts in 1V steps. This is achieved by using a heavy duty rotary switch and a +1V toggle switch. A clamp is included to lock the rotary switch setting. Short circuit protection is via an internal thermal cut-out. The unit is capable of delivering ac and dc simultaneously up to a total current of 8A. For short term operation up to 10A may be drawn.

0-12V d.c.  0-16V a.c.

0-25V d.c.  0-30V a.c.

£150.00

£163.00

 

Rugged power supplies designed to meet the demands of Physics, Chemistry and Technology departments. 

 

Unit 1 offers a continuously variable output from 0-16 volts a.c. @10A and 0-12 volts fwr d.c. @ 8A. It is fitted with a dc LCD meter and adjustable voltage limit lock.

 

Unit 2 offers a continuously variable output from 0-30 volts a.c. @8A and 0-25volts fwr d.c. @ 7A. It is fitted with a dc LCD meter and adjustable voltage limit lock.

 

The units are housed in a custom designed, powder coated steel case with carrying handle and four heavy duty feet which make the units easy to store as they are stackable.

 

Complete with fixed mains lead, these units will find a ready home in Physics, Chemistry and Technology departments everywhere.

 

Powerswitch                                £73.00

A compact power supply offering 2, 4, 6, 8, 10,and 12 volts at currents of up to 5A. Both dc and ac outputs may be used simultaneously up to the rated output. The output is protected by a push button cut-out. The unit is 2A fused on the back panel and comes complete with a moulded mains lead and plug.

4 units are designed to fit in a shallow Gratnell tray.

12V 2A dc                                    £33.00

Specifically designed for use with ray boxes, ripple tank illuminants, low voltage microscope lamps, smoke cells, pcb drills etc. This versatile unit is unregulated and unsmoothed. Short circuit protected.

 

Powerlock                                   £85.00

Similar to the above unit but voltage selection is made using a keyswitch.  The key may be removed in any position. This makes it impossible for a student  to alter the voltage. A single profile key is used which means that one key can be used to operate all the units. Comes supplied with two keys.

8A Continuously Variable PSU                           £95.00

A continuously variable power supply with an output of  0 - 12Volts d.c. @ 8A continuous. The output is protected by an automatically resetting thermal trip switch.  The output is shown as 0-100% on the dial.

 

 

 

 

 

 

12V3A ac                                     £36.00

 

This unit is specifically designed to power ray boxes up to 36W e.g. Griffin, Philip Harris etc.  Short circuit protected.

Westminster Power Supply         £55.00

This unit will deliver up to 12A ac or dc through colour coded terminal posts. Ideal for electromagnet investigations.