The cable identifier is a special instrument developed according to the needs of the power industry. It is used to identify the operating status of cables during the installation, relocation, maintenance, and fault handling of power cables, to identify the specific cable to be found among multiple cables of the same type, and also to accurately locate the short-circuit point of a short-circuited cable (where the short-circuit resistance is approximately zero).
The cable identifier consists of three parts: a signal generator, a receiving identification clamp, and an indicator meter. It is currently a new type of tester with advanced technology and superior performance among similar testers in China. When using the receiving identification clamp signal detector, the signals detected on other cables are much smaller and in the opposite direction. By indicating the amplitude and direction through the meter, the cable under test can be easily determined. Due to the dual discrimination of direction and magnitude, the identification accuracy of this cable identifier reaches 100%.
In the installation, relocation, maintenance, and fault handling of power cables, it is used to identify a specific cable to be found among a bundle of cables. This cable identifier has the characteristics of accurate cable identification (dual discrimination of direction and amplitude), fast operation, simple use, and wide application range.
The transmitter and receiver of the cable identifier use microcontroller-based encoding and decoding technology and PSK technology widely used in the communication field. A phase-encoded signal with an average value of zero is transmitted on the transmitting clamp. The microcontroller in the receiver performs hardware and software filtering on the received signal before phase identification. Connect the red wire of the transmitter to the cable and the black wire to ground. The arrow of the receiving clamp points to the cable terminal. When the receiving clamp clamps onto a certain cable, the receiver's ammeter deflects to the right, accompanied by audible and visual indication. When clamping other cables, the ammeter deflects to the left, and the current direction is opposite to that of the identified cable, with no audible or visual indication. This reflects the uniqueness of the target cable to be identified, making it easy to distinguish the identified cable from multiple cables. Moreover, since the signal current intensity on the identified cable is the same along the entire line, the electromagnetic signal intensity received by the receiving clamp along the cable is consistent, and the identified cable is not limited by its length.
