FIELD: engineering of high-frequency communications along electric power lines, possible use for transmitting dispatch control signals, counter-emergency automatics and relay protection of power objects.
SUBSTANCE: connecting device at input and output has voltage surge protection devices, and consists of first inductiveness coil and adjustment node in the latter parallel relatively to each other. Connecting device additionally includes third protective device in form of power surge limiter. In case of occurrence of dangerous power surge in adjusting node aforementioned third protective device activates and transition process fades due to misalignment and decreased quality of circuit. Also to improve safety first inductiveness coil is utilized as grounding valve and together with capacitor component of power surge limiter connected on the side of device input, forms a parallel oscillation contour. Because resonance frequency of contour is positioned within pass band of device, as a result required value of inductiveness of protective valve is decreased and broadband capacity of connecting device is increased for both transformer and automatic-transformer variants of realization of resistance synchronization means into adjustment node.
EFFECT: improved reliability during operation under conditions of internal transition processes, improved safety and improved broadband capacity of connecting device.
2 cl, 2 dwg
