TH26602U - Electrical system verification equipment - Google Patents

Abstract

The OCR (On-Screen Receiver) is an electrical system testing device consisting of three pairs of voltage meters: phase-to-neutral, neutral-to-ground, and phase-to-ground, to display the electrical potential difference between all pairs and the ground. It features a three-way on/off switch to detect current in the phase and neutral wires, along with contact-sensing lights for the phase, neutral, and ground wire sockets. A primary indicator light shows a complete connection between the phase and ground wires. Furthermore, there are sockets to be tested, allowing current to flow into the device. When a user touches the contact-sensing light, it illuminates if current is flowing, reducing the time required for electrical system testing without causing damage to the premises or equipment.

Claims (3)

ocr 1. Electrical system verification device consisting of a phase-neutral voltage meter (1), a neutral-ground voltage meter (2), a phase-ground voltage meter (3) to show the potential difference between all pairs of wires and the ground, with a first switch (4) that is open-closed to catch the current in the phase and neutral wires, and providing one contact detection light (5) as the socket for the phase wire, a second contact detection light (6) as the socket for the neutral wire, a third contact detection light (7) as the socket for the ground wire, and a first status indicator light (8) that shows the complete connection status between the phase and ground wires, and a socket to be checked (17) to allow current to flow into the electrical system verification device. It has the following characteristics: the first switch (4) is used as a switch for the phase and neutral wires relative to the ground, which is initially set to the closed position. If the first switch (4) is pushed to the open position, it will connect the circuit to the first indicator light (8), and turn on the phase-to-ground voltage meter (3) and the neutral-to-ground voltage meter (2) to check for a voltage difference that exceeds the value the first indicator light (8) can handle. Turning on the phase-to-ground voltage meter (3) will cause current to flow through the phase-to-ground voltage meter (3), resulting in a current difference between the phase and ground currents, which will cause the residual current device (RCD) to trip. At the same time, it will also turn on the neutral-to-ground voltage meter (2). If the outlet to be checked (17) has the phase-to-neutral pairs reversed, the neutral-to-ground voltage meter (2) will act as the phase-to-ground voltage meter (3), which will also cause the RCD to trip. The phase-to-ground voltage meter (3) is used for checking for a voltage difference. This is correct in the event that the neutral wire is not connected to the ground or the neutral wire is broken, which requires a decision based on the phase-to-ground voltage difference of the voltage meter (3). The first indicator light (8) is used to check for the presence of the ground wire, while the first contact light (5), the second contact light (6), and the third contact light (7) are used to detect the current of the outlet to be checked (17). When the user touches the first contact light (5), the second contact light (6), or the third contact light (7) with their finger, the contact light will illuminate as current flows through the user's body, an amount of current that does not affect the user. 2. Electrical system verification equipment in accordance with claim 1, which includes a phase-to-neutral voltage meter (1), a neutral-to-ground voltage meter (2), and a phase-to-ground voltage meter (3) that shows the electrical potential difference. If the electrical potential difference is high, it means that the outlet to be checked (17) has current flowing through it, but if the electrical potential difference is low, the ground is used as a reference point. 3. Electrical System Verification Devices in accordance with Claim 1, where the phase-to-neutral voltage meter (1), the neutral-to-ground voltage meter (2), and the phase-to-ground voltage meter (3), upon detecting an error in the internal wiring of the outlet to be checked (17), will switch on the second switch (9), the third switch (10), the fourth switch (11), the fifth switch (12), and the sixth switch (13) respectively, along with a second indicator light (15) and the electrical system verification device outlet (16).