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5. OPTIONAL COMPONENTS
5.1 MECHANICAL OPERATIONS COUNTER
A FIVE DIGIT MECHANICAL COUNTER CAN BE SUPPLIED,
MOUNTED IN THE FACEPLATE Of THE BREAKER (FIG. 3.3.2, ITEM 7).
THIS DEVICE IS MECHANICALLY DRIVEN BY THE "CHARGED/DIS-
CHARGED" INDICATOR. THE COUNTER OPERATES ONCE FOR EACH
CHARGING OF THE BREAKER MAIN SPRING. NO ADJUSTMENT OR
MAINTENANCE IS REQUIRED FOR SUCCESSFUL COUNTER OPERATION.
OPERATIONS COUNTERS ARE RECOMMENDED WHERE BREAKERS
WILL BE SUBJECTED TO FREQUENT OPERATIONS AS AN INDICATOR OF
THE RECOMMENDED MAINTENANCE INTERVALS.
5.2 CELL SWITCHES
CELL SWITCHES MOUNTED IN THE CRADLE CAN BE PROVIDED
WHEN REQUIRED TO SERVE AS POSITION INDICATORS OR AS
INTERLOCK BYPASSES. THE SWITCHES ARE OPERATED BY A BRACKET
ATTACHED TO THE BREAKER FRAME WHEN BREAKER IS CRANKED
INTO THE "OPERATING" POSITION.
EACH SWITCH CONTAINS ONE NORMALLY CLOSED AND ONE
NORMALLY OPEN ELECTRICALLY SEPARATE CONTACT. A TOTAL OF
SIX SWITCHES CAN BE SUPPLIED. THESE CONTACTS ARE RATED 10
AMPERES UP TO 300V A.C.
ON BREAKER FRAME SIZES 14 INCH AND 21 INCH (UP TO
2000 AMP), CELL SWITCHES MOUNT ON TOP OF THE CRADLE
BACKPAN. ON LARGER FRAME BREAKERS THEY MOUNT IN LINE
WITH THE SECONDARY DRAWOUT CONTACTS.
FIG.
5.2.1 CELL SWITCHES
1.
CELL SWITCH OPERATING BRACKET
2.
BREAKER FRAME
3.
CELL SWITCH
4.
CRADLE BACKPAN
5.3 ANTIPUMP RELAY
BREAKERS CONTROLLED BY LONG TIME OR PERMANENTLY
MAINTAINED CLOSE CONTACTS INCORPORATE TWO CLOSE COIL (CC)
LIMIT SWITCHES AND AN ANTIPUMP RELAY (A.P.R.). WHEN THE
CLOSING COIL IS ENERGIZED, BOTH "CC" SWITCHES ARE OPERATED. A
CLOSING CONTACT OF ONE "CC" SWITCH NOW ENERGIZES THE A.P.R.
COIL. ONE OF THE CLOSING A.P.R. CONTACTS PARALLELS THE "CC"
SWITCH CONTACT PROVIDING A.P.R. SEAL IN FUNCTION. A CLOSING
CONTACT Of THE SECOND "CC" SWITCH PARALLELS A NORMALLY
CLOSED A.P.R. CONTACT IN THE CLOSING COIL CIRCUIT MAINTAINING
CONTROL POWER TO THE CLOSING COIL UNTIL THE CLOSING SPRING
IS FULLY RELEASED AND THE BREAKER CLOSED. SPRING RELEASE
CAUSES DE-ENERGIZATION AND RESET OF THE CLOSING COIL AND
"CC" SWCHES WHILE THE A.P.R. REMAINS ENERGIZED AND ITS HELD
OPEN CONTACT IN THE CLOSING COIL CIRCUIT BLOCKS RE-
ENERGIZATION OF THE SAME UNTIL THE MAINTAINED CLOSING
CONTACT IS OPENED. THIS OPTION ALLOWS SPRING CHARGING
MOTOR RE-ENERGIZATION IMMEDIATELY AFTER CLOSING SPRING
DISCHARGE REGARDLESS Of OPEN OR CLOSED BREAKER POSITION
THEREBY PROVIDING FOR FAST TRIP - RECLOSE OPERATION.
THE ANTIPUMP RELAY AND ITS CONTACTS ARE IDENTIFIED
ON THE WIRING DIAGRAM BY THE SYMBOL "Y".
FIGURE 5.3 ANTIPUMP RELAY
5.4 UNDERVOLTAGE TRIP DEVICE
THE UNDERVOLTAGE TRIP DEVICE IS A SPRING LOADED
RECTANGULAR SOLENOID WHICH WILL TRIP THE BREAKER WHEN
ITS SUPPLY VOLTAGE TO THE SOLENOID DROPS BELOW A
PREDETERMINED LEVEL AND HOLDS THE BREAKER IN A TRIP FREE
STATE UNTIL SUPPLY VOLTAGE RETURNS. THE UNDERVOLTACE
TRIP WILL DROP TO TRIP THE BREAKER WHEN SUPPLY VOLTAGE
DROPS BELOW APPROXIMATELY 50% AND WILL PULL IN OR RESET
WHEN VOLTAGE RISES ABOVE 85%.
THIS DEVICE CAN BE SUPPLIED TO OPERATE
INSTANTANEOUSLY OR WITH THE ADDITION OF A MECHANICAL
ESCAPEMENT MECHANISM, CAN HAVE AN ADJUSTABLE 0 TO 5
SECOND TRIPPING DELAY.
