PHEP 34 Flashcards
THE TRANSFER OF INTELLIGENCE
CAN BE ACCOMPLISHED EITHER BY SOLID WIRE OR THROUGH SPACE
AN INTRAPLANT TELEPHONE CIRCUIT WHICH IS ARRANGED SO THAT EITHER THE TRANSMITTER OR THE RECEIVER CAN BE SWITCHED FROM THE CIRCUIT WHEN NOT IN USE IS CALLED
A PUSH TO TALK ARRANGEMENT
CARRIER CURRENT
IS A RADIO FREQUENCY SIGNAL MODULATED BY ANOTHER SIGNAL AT AN AUDIO FREQUENCY RATE AND THUS CARRIES THE INTELLIGENCE OF THE SECOND SIGNAL
A DEVICE INSTALLED ON CARRIER COMMUNICATION EQUIPMENT WHICH MAKES IT POSSIBLE FOR TRANSMITTER AND RECEIVER TO OPERATE CONTINUOUSLY AND WITHOUT SWITCHING OPERATIONS IS CALLED
AN AUDIO HYBRID UNIT
CARRIER FREQUENCIES
MAY RANGE AS HIGH AS 200KHZ AND AS LOW AS 30KHZ
ON THE INTERMITTENT CARRIER RELAY SYSTEM
TRANSMITTED SIGNALS ARE USED TO PREVENT RELAYS ON UNFAULTED SECTIONS FROM TRIPPING WHILE RELAYS ON THE FAULTED SECTION ARE TRIPPED BY NOT RECEIVING SIGNALS
CARRIER EQUIPMENT IS ISOLATED AND PROTECTED FROM THE HIGH VOLTAGE LEVELS OF POWER TRANSMISSION CONDUCTORS THROUGH THE USE OF
COUPLING CAPACITORS
A CARRIER RELAYING ARRANGEMENT WHEREBY SIGNALS ARE TRANSMITTED CONTINUOUSLY AND RECEIVERS ARE USED TO BLOCK THE CIRCUIT BREAKER TRIP CIRCUITS IS CALLED
A CONTINUOUS SYSTEM
A CARRIER DRAIN COIL WOULD BE USED WITH
A COUPLING CAPACITOR
A WAVE TRAP WOULD NOT BE USED TO
INCREASE IMPEDANCE AT THE POWER FREQUENCY
THE LINE TUNING UNIT IN A CARRIER COMMUNICATION ARRANGEMENT
PROVIDES ADJUSTABLE INDUCTANCE TO COMPENSATE FOR REACTANCE DEVELOPED IN COUPLING CAPACITORS
WHEN A CARRIER CIRCUIT IS COUPLED TO A SINGLE CONDUCTOR OF A 3 PHASE POWER LINE WITH GROUND AS THE RETURN PATH THE ARRANGEMENT IS CALLED A LINE TO GROUND COUPLING. ALL OF THE BELOW STATEMENTS DEALING WITH THIS METHOD OF COUPLING ARE TRUE EXCEPT
ALL LINE NOISE IS ELIMINATED
A METHOD OF COUPLING WHERE THE CARRIER SIGNAL IS COUPLED TO THE SAME PHASE OF 2 CIRCUITS WHICH PROVIDES FOR UNINTERRUPTED CARRIER SERVICE DURING PERIODS OF MAINTENANCE IS CALLED
DOUBLE CIRCUIT GROUND RETURN COUPLING
WHERE IT IS DESIRED TO COUPLE THE CARRIER SIGNAL TO SEVERAL TRANSMISSION LINES SIMULTANEOUSLY AT A GIVEN LOCATION THE TYPE OF COUPLING USED IS
BUS COUPLING
VHF AND UHF RADIO ARE BOTH USED AS A COMMUNICATION CHANNEL
ALL THREE OF THE ABOVE
