| 摘要 |
<p>PURPOSE:To permit detection of a transformer for a gauge by providing an insulating spacer supporting a bus bar with an intermediate electrode connected through a capacitor to an amplifier and comparing the output of the amplifier and the output of the transformer for the gauge. CONSTITUTION:A branch bus bar 2 is supported on an insulating spacer 8 and is connected to a transformer 3 for a gauge, and an intermediate electrode 9 is provided on the insulating spacer 8 on the outer periphery of the bus bar and is connected in parallel with a capacitor 11 connected through an amplifier 12 to a relay 13. Thus, normally a switch 13a of the relay 13 is ''off'', and a switch 14a of a relay 14 is ''on''. When the output voltage vanishes with a trouble in the gauge transformer 3, the switch 14a of the relay 14 is caused to operate a relay 15 so as to cause an alarm 16 to deliver an alarm. Thus, it is possible to reduce the number of parts capable of withstanding high voltage, simplify the construction and reduce the cost.</p> |
