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| Illustration 1 | g01222249 |
Digital Voltage Regulator (1) Display (2) Keypad (3) J1 connector (4) Screw terminals | |
Display (1) of the digital voltage regulator, shows numbers that represent different parameters of the digital voltage regulator system. Keypad (2) is used to change the information that is shown on display (1). J1 connector (3) is used to join the digital voltage regulator to a personal computer. Screw terminals (4) are used to join the digital voltage regulator to the generator and various customer options.
The digital voltage regulator is a microprocessor based voltage regulator. The main purpose of the digital voltage regulator is to regulate output voltage of a generator which is used with an engine generator set. Service personnel can modify (configure) certain regulation characteristics. The modifications will allow the engine generator set performance to be optimized. The digital voltage regulator can also integrate into one package many options that were previously panel mounted. The options include KVAR/PF controller, overexcitation protection, fault detection, overvoltage protection, undervoltage protection, diode monitor, reverse power relay and system parameter monitoring.
The configurable parameters of the digital voltage regulator are listed below.
- Voltage versus frequency (V/Hz) characteristic
- Fine voltage level adjustment
- Droop adjustment
- Overvoltage trip point with adjustable trip time
- Undervoltage trip point with adjustable trip time
- Gain
- Single-phase or three-phase true RMS sensing
- Underfrequency trip point
- Knee frequency
- Performance gains
- Generator set parameters
- Minimum voltage
- Diode monitor ripple level
- Reverse VAR trip time
- Reverse power trip point with adjustable trip time
- Optional KVAR level
- Optional power factor level
The protective functions that the digital voltage regulator provides are listed below.
- Overvoltage protection
- Undervoltage protection
- Loss of sensing
- Rotating diode monitor
- Overexcitation protection
- Reverse VAR detection
- Underfrequency protection
- Instantaneous field over current trip
- Optional reverse power relay
- Loss of frequency
The digital voltage regulator can be set up for a specific application by using the configurable parameters. Parameters are preset at the factory. Parameters may need to be adjusted in order to meet the specific requirements of a site. The digital voltage regulator also detects faults and sets the appropriate alarm or caution. Certain system parameters can also be monitored on the display of the digital voltage regulator.