Following the change of time and technical measures,some hidden troubles in the hydropower station transformer,such as the malpractices and its harmful aftermath in the main connection mode and the transformer operation,and the overtension of the terminal voltage and the auxiliary power,were emerged,it is necessary to reform aiming at deferent status.

Practice and ponder on changing mode of connection of rectiformer;

The principles for the mode of connection of whole compensating device and how to choosing the parameter of capacitor and current-limiting reactor are analyzed.

It gives technical characteristics about the construction of capacitive winding, mode of connection and circuit protection in 3phase capacitance lowloss energysaving power transformer.

Several DCS-based wiring methods for connection of auxiliary units in medium and small sized power stations into the DCS control system are introduced.

The wiring errors methods of voltage loop will eliminate by multimeter and phase angle table;the wiring methods of electric current loop will judge though moment way or phase volt-ampere way.

Parameter selection,protection and wiring mode of the series reactor were analyzed.

The problems in the aspects of design type selecting and wiring mode for HV electric energy measuring device were pointed out.

The principle and method for judging 48 wiring modes of the three-phase and three-wire Watt-hour meter by using pincers power factor meter are discussed in this paper.

Selection of connection mode of 10 kV distribution network in central urban area;

Analysis of typical connection modes of urban middle voltage distribution network;

The main wiring forms brings a series of new problems to configuration & operation of relay protection.