Fuse testing device for use by electrician, has four contacts and two LEDs, where contacts are short circuited by fuse ends and one LED is illuminated if fuse is defective, else contacts are not short circuited and other LED is illuminated

摘要

#CMT# #/CMT# The device has four helical contacts (2, 2A, 3, 3A), each made of tinned copper wire wound on an insulating support and arranged on a printed circuit board (6). Ends of a fuse (1) to be tested, short circuit the contacts (2, 2A) and the contacts (3, 3A) and a light emitting diode (LED) (4A) is illuminated, if the fuse is defective, and the ends do not short circuit the contacts and a LED (4) is illuminated if the fuse is not cut. #CMT#USE : #/CMT# Used by an electrician for testing the state of a fuse in domestic applications. #CMT#ADVANTAGE : #/CMT# The arrangement of the device is such that one LED is illuminated if the fuse is defective and the other LED is illuminated if the fuse is not cut, and hence the fuse is not considered to be bad when the fuse is rusted or when the user does not properly place the fuse. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows an overview of a fuse testing device. 1 : Fuse 2, 2A, 3, 3A : Contacts 4, 4A : LEDs 5, 5A : Batteries 6 : Printed circuit board.