JPH0168638U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an operation control device for a shield breaker according to an embodiment of the present invention, FIGS. 2 and 3 are circuit diagrams showing the main parts of the circuit in FIG. 1, and FIGS. 4 and 5. 1 is an operational characteristic diagram of the device shown in FIG. 1, and FIG. 6 is a developed configuration diagram of the operating device for a shingle breaker to which the present invention is applied. CS1...Shiya breaker closing command switch, CS2
...Shrink breaker command switch, 52Y, 60...Repeat prevention relay, 52Yb...Repetition prevention relay normally closed contact, 52a, 52b...Shrink breaker auxiliary contact, 52c...Closing coil, 52T ...Trip coil, 100A...First voltage detector, 100
B... Second voltage detector, 102, 103... Light emitting element, 105... Phototransistor, 106...
...Photocoupler, 107...Mechanical slit, 108...Cover, 110...Time measurement circuit,
111...Nand gate, 112a...First timer, 112b...Second timer, 113a
...first comparator, 113b...second comparator,
114...And gate, A...Input circuit, B...
... Closing spring energy storage circuit, C... Shiya disconnection circuit.

Claims (1)

[Claims for Utility Model Registration] The cutting operation and the closing operation of the cutting switch are performed via a link mechanism by the spring forces of the cutting spring and the closing spring, respectively, and the stored energy of the closing spring is applied. A closing command switch that issues a closing command, a closing coil connected in series to the closing command switch, and a closing coil connected in series to the closing command switch.
A normally closed contact of a repeat prevention relay that is energized in response to a closing command, and a normally closed contact of a motor operating electromagnetic contactor that operates a closing spring energy storage motor for storing energy in the closing spring. a closing circuit that includes a contact circuit that is connected in series to the closing coil and is made up of auxiliary contacts of the closing coil, a closing circuit that controls the closing operation, a closing command switch that issues a closing command, and a closing circuit that issues a closing command; The switch includes a tripping coil connected in series through an auxiliary contact of a shunt breaker, and has a shunt disconnection circuit for controlling the shunt disconnection operation, and is connected in parallel to the closing command switch of the closing circuit and the closing coil. a first voltage detection circuit having a photocoupler that is connected in series with a photoelectric conversion element that converts an optical signal of an electrical/optical conversion element that converts an electrical signal into an optical signal into an electrical signal; an electrical/optical conversion element that is connected in parallel to the disconnection command switch and in series with the tripping coil and converts an electrical signal into an optical signal; and an optical signal of the electrical/optical conversion element. a second voltage detection circuit including a photoelectric conversion element that converts the voltage into an electrical signal; and a detection signal of the first voltage detection circuit and the second voltage detection circuit.
a NAND gate that receives as input the detection signal of the voltage detection circuit; a first timer that receives the output of the NAND gate and the output signal of the first voltage detection circuit as input; and the output of the NAND gate and the second voltage detection circuit. a second timer with inputs and a first timer with
, first and second comparators for comparing the output signal of the second timer and the reference time signal;
and a time measuring circuit having an AND gate receiving the output signal of the second comparator and the power supply voltage detection signal as input.