TANK 3261146 - Caterpillar

Illustration 1 g00538257
Digital Voltage Regulator (1) Display (2) Keypad (3) J1 connector (4) Screw terminalsDisplay (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, over excitation protection, fault detection, over voltage protection, under voltage protection, diode monitor, reverse power relay and system parameter monitoring.The digital voltage regulator parameters that can be configured are listed below.
Voltage versus frequency (V/Hz) characteristic
Fine voltage level adjustment
Droop adjustment
Over voltage trip point with adjustable trip time
Under voltage 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 levelThe protective functions that the digital voltage regulator provides are listed below.
Over voltage protection
Under voltage protection
Loss of sensing
Rotating diode monitor
Over excitation protection
Reverse VAR detection
Under frequency protection
Instantaneous field over current trip
Optional reverse power relay
Loss of frequencyThe digital voltage regulator can be set up for a specific application by using the parameters that can be configured. 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.