JPS62189666U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram showing an embodiment of the electric energy measuring device according to this invention, Fig. 2 is a front view showing an example of the electric energy measuring device according to this invention, and Fig. 3 is a cutaway of the main part of Fig. 2. 4 is a bottom view of the weighing display body, FIG. 5 is an example of a holder with a power supply wire wrapped around it, FIG. 5a is a top view, and FIG. 5b is a top view. Fig. 6 is a plan view showing an example of a feeder cable to explain the action of winding the feeder line around the holder; Fig. 7 is a cross-sectional view taken along line 5b-5b of
- 7 is a cross-sectional view taken along line 7. 1...Metric display section, 3...Power pulse train conversion circuit,
4... Counting display circuit, 5... Power supply circuit, 6... Holder,
7R, 7S, 7T...Power supply line of the circuit under test, 8a,
8b... Primary side feeder line of voltage transformer, 9a, 9b...
Power supply lines on the secondary side of the current transformer, 10a, 10b...
Magnetic core, 10a1, 10a2, 10b1, 10
b2... 2-split magnetic core, 11... Power supply cable,
12a, 12b, 12c...Terminal pin, 21...Measuring display unit main body, PT...Voltage transformer, CT...Current transformer, ET...Voltage transformer for power supply, R1, R2... Winding diameter. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A voltage transformer that converts the load voltage of the circuit under test into a voltage proportional to it, a current transformer that converts the load current into a current proportional to it, and the outputs of both transformers. A power pulse train conversion circuit that converts a signal into a multiplication pulse train, a counting display circuit that counts and displays the pulses from this power pulse train converting circuit, and a DC voltage obtained from the voltage of the circuit under test and the power pulse train converting circuit and counting display. A power supply circuit that supplies direct current voltage to the circuit is set in the main body of the power consumption display unit, and a plurality of power supply lines of the circuit under test are wrapped around a holder, and this holder is attached to the main body of the measurement display unit. The current transformer is removably connected to the holder, and the current transformer is divided into two at the joint between the holder and the weighing display main body, and the power supply line on the primary side of the voltage transformer and the power supply line wound around the holder are connected to each other. An electric energy meter characterized by being electrically connected. (2) A current transformer is constructed by dividing a ring-shaped magnetic core into two, which passes through the primary and secondary power supply lines.
The electric power meter according to claim 1, which is a registered utility model, wherein one of the two divided magnetic cores is fixed to a holder and the other magnetic core is fixed to the main body of the metering display section. (3) Wrap the three feeder wires separated from one feeder cable in parallel on the holder with a predetermined interval, and adjust the winding diameter of the center feeder wire to the winding diameter of the feeder wires on both sides. The electric energy measuring device according to claim 1 or 2 of the utility model registration claim, which is made larger than the diameter. (4) A terminal pin electrically connected to the power supply line on the primary side of the voltage transformer is provided protruding from the weighing display body at the joint between the holder and the weighing display body, and the terminal pin is connected to the holder. A power consumption measuring device according to claim 1, 2, or 3 of the utility model registration claim, which is electrically connected by being inserted into a power supply line wrapped around a power supply line.