The invention relates to equipment for monitoring the switching-off and on time of a high-
voltage circuit breaker on line, comprising monitoring devices, a main control panel, a communication front-end
machine and an upper computer. The equipment is characterized in that the monitoring device I is provided with the main control panel, a high-speed
data processing unit, a DSP2812 and a logic-
signal processing unit which is a CPLD (
complex programmable logic device), the output interface of the main control panel is connected with a host computer, a waveform output, a
network communication interface and a watchdog, the current measuring port and the
stroke measuring port of the monitoring device I are connected with a
circuit breaker I, the current measuring port and the
stroke measuring port of the monitoring device II are connected with a
circuit breaker II, and the monitoring device I and the monitoring device II are connected with the communication front-end
machine and the upper computer through CAN buses. A photoelectric
current sensor is adopted to monitor various current signals in real time, the current signals are transferred to a digital
processing unit module through
optical fiber communication under the protocol IEC61850, the
internal object-oriented language C++ is adopted to programme, and the switching-off and on time of the high-
voltage circuit breaker is monitored on line so that the fault of the circuit breaker can be diagnosed.