JPH0436747U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a cutaway side view of essential parts showing an embodiment of this invention, Fig. 2 is a perspective view showing the test button of Fig. 1, Fig. 3 is an external perspective view showing the conventional one, and Fig. 4 is a perspective view showing the test button of Fig. 1.
The figure shows the cover opened in the direction of the arrow with respect to the base, Figure 5 is a diagram with the electronic circuit section removed from the cover of Figure 4, Figure 6 is a partial sectional view taken along the line - in Figure 5, FIG. 7 is a partially cutaway side view of the cover shown in FIG. 6 attached to the base, and FIG. 8 is a perspective view showing a test button. In the figure, 1 is a molded case, 5 is a zero-phase current transformer, 8 is a built-in relay, 9 is an amplifier device, 10, 1
1 is a buttonhole, 13 is a test button, 13a is an outer flange, 15 is a reset button, 19 is an annular groove, 2
0 indicates an annular rib. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] A molded case containing a zero-phase current transformer, an amplifier, a built-in relay, etc. has a buttonhole on the front, and operation buttons such as a test button and a reset button are inserted into this buttonhole from the inside. In the earth leakage relay which is inserted and prevented from coming off by an outer periphery flange, an annular groove is provided around the button hole on the front inner surface of the molded case, and an annular rib protruding in the counter-operation direction is provided on the outer periphery flange. An earth leakage relay characterized in that an annular rib is always fitted into the annular groove in a mounted state.