Overcurrent Tripping Device With Long Delay And Instantaneous Elements - Westinghouse DE-ION DB-75 Instructions Manual

MAIN TEN A N CE
LEGEND•
A-LONG DELAY STATIONARY MAGNET
B-LONG DELAY MOVING MAGNET
C-LONG DEL A Y FORCE LIMITING
D-DIAPHRAGM
E-AIR CHAMBER
F-LONG DELAY VALVE AND DIAL
G-LONG DELAY PICK-UP CALIBRATION
H-RESET VALVE
RESETTABLE
DELAY
CURRENT MAGNITUDE
TYPICAL TRIPPING CHARACTERISTICS
7B
FIGURE
FIG. 7- SCHEMATIC AND TYPICAL TIM E-CURRENT CHARACTE RISTICS OF
OVE RCURRENT TR IP PING DEV ICE WITH LONG DELA Y AND
16
J-TRIP CRANK
K-BREAKER TRIP FINGER
SPRING
L- INSTANTANEOUS STATION A R Y MAGNET
M-INSTANTANEOUS MOVING
Q-INSTANTANEOUS PICK-UP CALIBRATION SPRING
R-BREAKER MOVING CONTACT ARM
SPRING
W-SHAFT
ADJUSTMENT
INSTANT ANEOUS E LE MENTS
*
_j_
+
MAGNET
I
mJm_
1
-
SCHEMATIC DIAGRAM
FIGURE 7A
GUIDE BEARING
SOLID JOINT
PINNED JOINT
NO JOINT
STOP SURFACE
ADJUSTABLE
I. B. 35-240-1
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