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Circuit breaker is a very important control and protective equipment in the field of grid system. When the electric equipment or circuit are in accident, the relay protection and circuit breaker will cut the fault section from grid rapidly and guarantee the grid running safely. However, there are a mount of high voltage circuit breakers. According to the traditional planned overhaul model to inspect circuit breaker, there will be some phenomenons such as large workload, high expense and so on. At the same time, different circuit breakers need different signal sources. During maintenance, this character will lead to the waste of human resource and cause artificial errors. Therefore, the paper presents a new standard signal source of circuit breaker. It realized the integrated, informational and intelligent reform for the various kinds of signal sources. Utilize standard signal source to realize the calibration for common equipment can reduce the maintenance workload and improve the pertinence of maintenance. It is very helpful for improving the running reliability and economy of electric equipment.

Transformation equipment on-line monitoring device aims at monitoring substation equipment operation parameters. Through internal network, the data will be transported to the on-line monitoring platform of electric power internal network to provide maintenance basis for maintenance department. While the existing calibration method needs professional personnel carrying relevant calibrators and conducting contrast calibration on site. In order to make up for deficiency of existing substation on-line monitoring device calibration, such as instruments isolated with each other, instrument control and data management low automation, data contrast, retrieval and archiving is inconvenient, personnel requirement large and so on. This paper presents a new method for intelligent check of transformation equipment condition monitoring device based on wireless communication technology and computer control technology. It can promote the accuracy of calibration greatly and provide a powerful guarantee to grid reliable operation.

The calibration of SF6 gas density on-line monitoring device needs to simulate different pressure environment to calibrate the data accuracy of the on-line monitoring device. At present, the simulation of different pressure environment is conducted by artificial cranking bar to change the stroke of cylinder piston to realize the aim of change the gas pressure. Generally, technical personnel take calibration device to the field, select a suitable pressure, connect the checked device to test button and conduct the contrast calibration. Based on above operation, multi-group data of the checked on-line monitoring device can be obtained. While this method depends on artificial manual operation, squander time and vigour and can not set pressure value exactly. In order to make up for deficiency of existing problems, the paper presents a calibration device on SF_6 gas density monitoring equipment. The calibration device can make the calibration procession conducted automatically through controlling the pressure and its lasting time automatically. The use of the device can effectively complete calibration and improve the quality of work.Facts show that it can provide a powerful guarantee to grid equipment reliable operation.

Aiming at the existing problems such as heavy workload and low efficiency of intelligent substation state monitoring device calibration, combined with the current information technology and intelligent technology, his paper presents a vehicle-borne intelligent verification system. The system adopts vehicle as the platform and transport data through GPRS/3G and MIWAVE wireless network. From the point of function optimization, information interaction and intelligent monitoring, the system realizes the integrated, information and intelligent transformation of kinds of standard signal source device and monitoring equipment for calibration. The use of the system can effectively complete calibration and improve the quality of work. The system has completed the calibration of many 500kV, 220kV substations monitoring devices successfully. Facts show that it can provide a powerful guarantee to grid equipment reliable operation.