TH45996B - Leak detection method for electrical equipment - Google Patents

Abstract

DC60 (31/10/43) Leak detection method for electric motor supplied electrical equipment consists of a voltage detection procedure that is generated in a voltage divider resistor at Is provided between the motor winding unit and the earthing terminal. During the absence of energy Excitation of the motor To detect a leakage occurring in the motor, the leak detection method for the electrical equipment supplied by the electric motor consists of a voltage sensing procedure being generated in a voltage divider resistor. that Is provided between the motor winding unit and the earthing terminal. During the absence of energy Excitation of the motor To detect a leak that occurs in the motor by that part

Claims (9)

1. The leak detection method for electric equipment supplied with electric motors consists of a voltage detection procedure that is generated in a voltage divider resistor. Is provided between the motor winding unit and the earthing terminal. During the absence of energy Excitation of the motor To detect a leak that occurs in the motor by that part 2. Leak detection method according to claim 1, in which leak detection is performed. After the electrical equipment is connected to the power source and before the motor is used. 3. Leak detection method according to claim 1, in which the motor integrates a coil unit. A number of phase wires and a number of voltage divider resistors are provided for Corresponding series of phase windings 4. Leak detection method according to claim 1, in which the motor has a number of phase winding units, the voltage divider includes a number of the first resistor segment that is Arranged on the input side of the corresponding phase winding unit And the second resistor A single set of grounded terminals that is connected to the first resistor. 5. Leak detection method according to claim 1, in which the motor is energized. From the DC power source which is obtained by converting the AC power source, the method remains It consists of a judging procedure that determines the voltage that is generated in the shunt resistor. Voltage at a DC waveform or a pulsating waveform The procedure for determining the voltage Based on the results of the decision. And comparison of the generated voltage In resistors divide the voltage with the reference value. To detect leaks by that part 6. Leak detection method according to claim 5, in which the voltage is converted by the A / D conversion in a short cycle sufficiently than the cycle time of the AC source. Collect electricity bills so waveform detection is performed. 7. The leak detection method according to claim 1, which still contains the Connect the earthing detection circuit which has a series circuit of the switching elements. And the resistors between the electrical enclosures or the grounded wires that are provided on the Casing and feeding side of the coil unit Turning on the switching element to determine whether the voltage generated in the voltage divider resistor has a DC waveform or a pulsating waveform. And warning when the voltage has a pulsating waveform 8. The leak detection method according to claim 5, which still includes the Connect the earthing detection circuit which has a series circuit of the switching elements and A resistor between the electrical enclosures or the grounded wires provided on the frame. Cover and input side of the coil unit Turning on the switching element to judge Determine whether the voltage generated in a voltage divider resistor has a DC waveform or a pulsating waveform. And warning when the voltage has a pulsating waveform 9. The leak detection method according to claim 1, in which the voltage divider resistor is to be supplied. To occur on a set of coils that are one phase