JPS6282546U - - Google Patents

Description

[Brief explanation of the drawing]

1A and 3A and 3A and 3B each show an embodiment of the present invention, and FIGS. 1A and 1B are a plan view and a partially cutaway side sectional view of a main part of an earth leakage switch and disconnector, respectively. , Figure 2 is a wiring diagram, Figure 3 A and B
are a plan view and a side view of the earth leakage alarm unit, respectively, FIG. 4 is a side sectional view showing a conventional device, FIGS. 5 to 7 A and B show different conventional examples, and FIG. 5 is a wiring diagram. , FIG. 6A and FIG. 6B are a plan view and a side sectional view of the main part, respectively, and FIG.
Figures A and B are a plan view and a side view, respectively, of the rating change unit. 1: Main body case, 2: Opening/closing section, 80: Earth leakage alarm unit, 82: Connector, 101: Earth leakage alarm section, 102: Sensitivity current adjustment circuit, 103: Alarm circuit.

Claims (1)

[Scope of utility model registration request] a zero-phase current transformer that detects earth leakage in the warning circuit; a sensitivity/operation time adjustment section connected to the secondary coil of the zero-phase current transformer; a tripping circuit operated by the output of the sensitivity/operation time adjustment section; It is equipped with an opening/closing section that is cut off by the tripping circuit, and a main body case that houses each of the above components, and a part of the circuit, mainly the sensitivity/operation time adjustment section, is configured as an independent rating changing unit. However, in the earth leakage and disconnection circuit in which the rating changing unit and the circuit inside the main body case are electrically connected by a connector provided on the rating changing unit, and the rating changing unit is detachably attached to the main body case, the zero phase change The sensitivity current adjustment circuit connected to the secondary coil of the flowmeter and the alarm circuit that lights up the indicator light by the output of the sensitivity current adjustment circuit are formed as an earth leakage alarm unit, and the earth leakage alarm unit is activated by the connector provided on this earth leakage alarm unit. and a circuit in the main body case are electrically connected, and this earth leakage alarm unit is configured to be detachably attached to the main body case in place of the rating change unit.