Quick Answer: The Electromagnetics Power Unit is a short-circuit-proof supply giving a fixed 1-0-1V a.c. and 2V d.c. at 10A, for experiments on magnetic fields around electric currents.
Last updated: October 2026
Key Features
Fixed output 1-0-1V a.c. and 2V d.c. at 10A
Unconditionally short circuit proof
Digital display of current or voltage, a.c. or d.c.
Terminal posts take 4mm plugs and heavy-gauge bare wire
Thermal trip and time-delay fuse protection for the transformer
Technical Specifications
Specification
Value
Output
1-0-1V ac and 2V dc at 10A
Fuse
T250mA time delay
Ratings
230V ac 50Hz 70VA
Temperature range
10 - 40°C
Humidity
10 - 90 %RH
Dimensions
175 x 190 x 298mm (W x D x H)
Mass
3.4kg
About This Product
Investigations into the magnetic field of a current-carrying wire or coil need high current at low voltage, and a supply that tolerates being shorted. In this unit the current is limited only by the resistance and reactance of the attached coil plus the unit's own internal resistance. The ac and dc outputs can be used together within a combined 10A, and two membrane switches choose what the display shows. Export supply of the Electromagnetics Power Unit can be arranged to laboratories and schools in Malawi, Belgium, Bangladesh, Solomon Islands, Togo and Dominican Republic.
Frequently Asked Questions
Q1. Why can it be short-circuited safely? It is designed to be unconditionally short circuit proof, because magnetic field investigations need high current at low voltage. The attached coil's resistance and reactance, with the unit's internal resistance, limit the current.
