초록 ▼

An on-site test unit is for an electric motor having an electronic timer having motor control contacts and a parallel capacitor completing a power connection with the opposite power connection being common. The test unit includes a portable housing with a fused power cable and an output connector. A

An on-site test unit is for an electric motor having an electronic timer having motor control contacts and a parallel capacitor completing a power connection with the opposite power connection being common. The test unit includes a portable housing with a fused power cable and an output connector. A switch, with a parallel test lamp, connects the power cable to connector output terminals. An internal test load lamp in parallel with a capacitor is connected in series to a control terminal and to a power terminal. A selection switch selectively supplies power to the terminals. For testing, the normal power supply is disconnected and the common connection to the motor and timer is opened. The connector may include a plurality of leads with terminal clips or releasable plug-in connectors in the motor and test unit. A dummy connector provides normal motor operation. In a motor test, the motor is connected by the selection switch to the power switch and cable. If the motor is inoperative and the power lamp lit, the motor needs repair. Momentary turn-on of the lamp indicates opening of the fused cable and a short-to-ground condition. In the timer position, power is connected to the timer and to the test lamp in series with the timer contacts, lights the test lamp if operative.

대표청구항 ▼

A motor fault unit for testing a motor having a controller selectively connecting said motor winding to an incoming power supply, said controller having an electrical operator for a controller connecting means between said motor winding and said power supply, comprising a separate power supply unit

A motor fault unit for testing a motor having a controller selectively connecting said motor winding to an incoming power supply, said controller having an electrical operator for a controller connecting means between said motor winding and said power supply, comprising a separate power supply unit having a first line and a second line, a power switch unit having a first switch in said first line and a second switch in said second line, a power switch indicator energized with said switch closed, a control state indicator connected to said first line downstream of said power switch, a test connector including a first power connector and a second power connector and a control test connector connected to said control state indicator, and said test connector having first connection means connecting said first and second lines directly to said motor winding for operating said motor from said separate power supply unit, and said test connector having a second connection means connecting said first and second lines directly to said controller for energizing said operator and connecting said control state indicator in circuit with the first connecting means across said first and second lines for monitoring the state of said controller.