Vanguard Instruments CBPS-300 Operating Instructions Manual
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CBPS-300 OPERATING INSTRUCTIONS41.0 INTRODUCTION1.1 General DescriptionVanguard Instruments Company producesthe CBPS-300 as a microprocessor-controlled circuit breaker DC power supply.This device was designed to replace thesubstation batteries during circuit breakertesting.The CBPS provides a ripple free, DC powersource to operate utility circuit breakers forcontact-timing and other breaker operations.The CBPS-300 allows the user to operatethe OPEN and CLOSE coils of a circuitbreaker during tests under differentselectable operating conditions such as fullvoltage or minimum voltage operations.External trigger input allows the CBPS-300to be used with the Vanguard Instrumentscircuit breaker timers.A separate DC supply is also available todrive the breaker mechanism chargingmotor.All CBPS-300 supply outputs are overcurrent and short circuit protected. Thisfeature protects the CBPS-300 power-supplies and eliminates the use ofconventional fuses or circuit breakerprotection circuitry.The CBPS-300 test voltage is selectablefrom 24Vdc to 250Vdc. The voltage controlknob on the CBPS-300 front panel allowsthe operators to select test voltages.Coil or charging motor voltage reading isdisplayed on a 2 line by 16-character back litLCD screen. Push button switches markedOPEN, CLOSE and MOTOR are used tooperate the breaker’s respected coils andcharging motor1.2 Functional DescriptionThe CBPS-300 is a variable voltage DCpower supply designed specifically toperform maintenance test on circuitbreakers. The CBPS-300 DC voltage isselectable for 24Vdc to 250Vdc. Its ripplefree DC output voltage is regulated up to 2%voltage variation under-load; making it anideal device for testing circuit breaker coilsunder different operating voltages.A built-in initiate circuit allows the user toOPEN or CLOSE breakers from the CBPS-300 control panel.The CBPS-300 will energize the breaker tripor close coil for one-second duration. Thisinitiate circuit is over current and shortcircuit protected. Reset key on the frontpanel allows the user to clear the faultcondition.An unfiltered DC supply is also available todrive the breaker mechanism chargingmotor.A voltage control knob allows the user to setcoil or motor test DC voltage. DC voltageoutput is shown on the 2 lines by 16characters back-lighted LCD.1.3 Furnished AccessoriesThe CBPS-300 is shipped with six 10-foottest cables with “quick disconnect” type testplugs on the unit end, and alligator clips atthe test load end. The following cables shallalso be included with the CBPS-300: Onepower cord, One ground cable and a cable-carrying bag. |
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