The load is a variable rheostat with series resistor as short-circuit protection. It is suitable for use when recording transformer characteristics to establish the class of accuracy.
Rheostat: 1 to 11kohm (smoothly variable)
Power rating: 20W
Inputs/Outputs: 4mm safety sockets
Dimensions: 297 x 114 x 140mm (HxWxD)
Weight: 1kg