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Related Manuals for Westinghouse CAS-8
Summary of Contents for Westinghouse CAS-8
- Page 1 I.B. 33-125-lA DESCRIPTION OPERATION MAINTENANCE • • INSTRUCTIONS PNEUMATIC OPERATING MECHANISM Type CAS-8 Oil Circuit Breakers WESTINGHOUSE ELECTRIC CORPORATION SWITCHGEAR DIVISION • EAST PITTSBURGH PLANT EAST PITTSBURGH, PA. EFFECTIVE FEBRUARY, 1949 SUPERSEDES 1.8. 33-125-1 Printed in U.S.A.
- Page 2 C UR RENT T R ANSFORMER BREAKER P ULL ROD TERM. B LOC KS ---- --..(CLOSED POSITION) OPER ATI ON COUNTER P AUX. SWIT CHES PNEUMATIC GOVERNOR SWITCH HINGED CONTROL MAG NETIC HEATER PILOT VALVE AUTO MATIC THROTTLE TRIP CO IL...
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Page 3: Safety Devices
1.8. 33-125 - lA CAS-8 OPERATING MECHANISM DESCRIPTION The Type CAS-8 Operating Mechanism is equipped connected by opening the AB breaker in the motor circuit, leaving the heaters energized. with single coil shunt trip, an exhaust valve with magnetic pilot, a magnetically operated pilot valve The closing equipment consists of an air com... - Page 4 MAGNET ADJUST ARMATURE fREE TRAVEL & � TOTAL TRAVEL RECTION FROM COMPRESSOR NOTE-ADJUST fOR MINIMUM BLEEDER OPENING SO THAT EXHAUST VALVE WILL NOT OPERATE ON NORMAL BREAI\ER AI R EXHAUST CLOSING. FIG. I. Cross-Sectional View of Type CAS-8 Operating Mechanism...
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Page 5: Manual Closing
INTAKE VALVE PILOT VALVE EXHAUST VALVE AIR EXHAUST FIG. 2. Type CAS-8 Operating Mechanism Manual Closing. Auxiliary Switches. For closing the mechanism A 10-pole and a 2-pole by hand, a manual closing device is available. To type W multi-contact rotary auxiliari switch, each in... -
Page 6: Receiving And Storage
Also large air duct into the cylinder above the main read the Westinghouse Air Brake Co. installation piston which is at the top of the cylinder in the fully and maintenance leaflet accompanying each com... - Page 7 � 1:':1 S CHEMATIC IIII I > � � <j> 60tv 115/230V. COMP R . MOT . SGR-12 RECLOSER (NOT SUPPLIED WITH BKR.l A UX. CONTA CT ADJUSTING BKR. RECLOSING 115/230 SPEED ALARM A�l � LOW PRESS HEATER'* CUTOUT (OPENS PRESS ALARM FOR L.P.l...
- Page 8 When the main piston approaches the end of its stroke, the roller on the trip end of the main lever strikes the sloping face of the latch, forcing it to rotate counter-clockwise about its fulcrum pin. As the main lever moves further down toward the closed position, it forces the pawl lever down thus freeing the trigger to rotate clockwise about its fulcrum pin so that as the roller clears the nose of...
- Page 9 CAS-8 OPERATING MECHANISM SCH E MATIC SEQUENCE OF OPERATION {BREAKER CLOSED BY AIR B OPENED BY SPR ING) MECHANISM IN OPEN POSITION NORMAL C 0 OPERATION AT ST AR T AND FINISH OF OPERATION MECHANICAL THROTTLE CONTROL---- -- -- -. .
- Page 10 RAPID OPERATION POSITION A ---- -- T RIP MAGNET ENERGIZED TO OPEN MECHANISM. TRIP EXHAUST PILOT -T - 1 MAGNETS DE-ENERGIZED MAGNETIC PILOT TO PERMIT RECLOSING. ENERGIZED TO ADMIT '" '0 """· "OCOSE MECHANISM OPENING IN POSITION TO RECLOSE WITH MECHANICAL THROTTLE CONTROL FULL OPEN POSITION B �...
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Page 11: Maintenance
CAS-8 OPERATING MECHANISM tween 1/32"-1/16", and may be adjusted by the left controls the differential. Another factor shimming or bending the stop (see Fig. 1) for the affecting the reclosing time is the amount of com latch. This is a high speed mechanism and these pression on the breaker accelerating spring. - Page 12 The first place to check for air leaks is the intake sively in closing. valve on the mechanism; a few operations of the An instruction leaflet from the Westinghouse Air breaker may dislodge any foreign material which Brake Co. is supplied with each compressor unit; it may be lodged at the valve seat.