NAREN Static Excitation Panel is designed to control the main field of the alternator directly without exciter. Excitation of the A.C. Generator should be suitably controlled to maintain a constant voltage against the load variation. Excitation current will depend on the design parameters and it will be in the order of 100 Amps to 500 Amps in case of higher rating generators. General construction of alternators are coupled with pilot exciter, where its output is connected to the main field generator and the pilot exciter field will be controlled by an AVR unit. In these types, regular attention is to be given to maintain the pilot exit or as it is rotary and wearing out of carbon brushes is a common feature. To over come this problem, static exciters are used which will eliminate the pilot exciter and control the main field directly.
It is designed with the latest semiconductor technology and is completely static in operation. This is available in different ratings to suit different makes of alternators.
Batteries are most essential to give emergency power to the equipment in the event of AC power failure. They are capable of storing the electrical energy by chemical process. This power is used to start a DG set or UPS to regain AC power. In telephone exchange and some other application like relay systems and electrical sub station batteries will float across AC to DC converter and supply the power to the equipment in the event of power failure. Some of the application are as below.
D.G Sets (for starting).
Telephone Exchange.
Electrical Sub Station.
U.P.S etc.
When ever the Battery supplies the power to the system it will be drained or discharged. The discharged batteries are to be charged the moment the power is resumed through a DC supply. The D.C source may be by D. C. generator driven by a AC to DC converter using power semi conductor. Battery Chargers are of two types namely Manual Control Type and S.C.R Control Type.
NAREN Static Excitation Panel is designed to control the main field of the alternator directly without exciter. Excitation of the A.C. Generator should be suitably controlled to maintain a constant voltage against the load variation. Excitation current will depend on the design parameters and it will be in the order of 100 Amps to 500 Amps in case of higher rating generators. General construction of alternators are coupled with pilot exciter, where its output is connected to the main field generator and the pilot exciter field will be controlled by an AVR unit. In these types, regular attention is to be given to maintain the pilot exit or as it is rotary and wearing out of carbon brushes is a common feature. To over come this problem, static exciters are used which will eliminate the pilot exciter and control the main field directly.
Batteries are most essential to give emergency power to the equipment in the event of AC power failure. They are capable of storing the electrical energy by chemical process. This power is used to start a DG set or UPS to regain AC power. In telephone exchange and some other application like relay systems and electrical sub station batteries will float across AC to DC converter and supply the power to the equipment in the event of power failure. Some of the application are as below.