In this paper

such issues as type and selection in the design of high voltage shunt capacitor device

parameters selection and improvement of the device protection are discussed

including careful demonstration the limit of total shunt capacity of capacitor in current China National Standard and selection of rectangular wave current for arrester only as per the capacity of capacitor bank in the present current electrical industrial standard

the optimized correction is made in the General specification of capacitor in the latest issued National Standard and the lack of effective protection of dry type series reactor is analyzed and demonstrated in detail.Moreover

the addition of fire alarm and extinguishing system for the indoor installation and the necessity on the development of new protection through modification of the reactor proper are recommended.Such idea as the form of capacitance protection and protection coordination setting（fault criteria） is proposed through the discussion of online monitoring system of shunt capacitor.It is expected that sort-out of the problem in question and to be improved in the design and application of the device is conductive to the design and development in the future.