FEDERAL PACIFIC DST 5-75 Instructions For Installation Manual Download | Manualshive

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Summary of Contents for DST 5-75

Page 1: ...JJ MED VOLTAGE INSTRUCTIONS FOR INSTALLATION Type DST 5 15 KV Magnetic Air Circuit Breakers IN DST November 1959 Courtesy of NationalSwitchgear com...

Page 2: ...Arc Chute Installation Installation of Inter Phase Barriers Electrical Operation Check Safety Precautions Installing Circuit Breaker in Cell 5 5 5 6 6 7 7 7 8 General Information 5KV and 15KV Magnetic...

Page 3: ...omes necessary to contact the factory concerning a breaker As each breaker is carefully factory adjusted before it is shipped no field adjustment should be necessary The following information has been...

Page 4: ...ER ACCESSORIES CLOSING LOCKOUT SWITCH 5 KV toggle switch 5 KV momentary switch 15 KV toggle switch 15 KV momentary switch 1551 0534 1551 0533 1551 0529 1551 0528 FIGURE 2 CINCINNATI RECORDER ATTACHMEN...

Page 5: ...my Dummy 1551 1680 1552 1680 5 Do not install arc chutes and barriers until ready to push the breaker into its cell 2000 6 First operate the breaker by means of its maintenance operating handle This i...

Page 6: ...nes at A and B should be 1 8 1 32 apart Remove from crate Clean and blow out with dry air if necessary Inspect for damage a Broken porcelain plates small chips not objectionable b Broken splitter plat...

Page 7: ...J on each side of bracket 14 Fasten both coil leads at H with screws B removed in step 4 Note These leads are in parallel Other end of coil is connected internally to arc runner 15 Check operation of...

Page 8: ...anel forward until its contacts engage contacts in the cell The breaker can now be operated electrically in the Test position c Insert racking in handle Rotate handle counter clockwise until lever and...

Page 9: ...operating mechanism provides positive visual indication of contact position Veeder counter is supplied to record number of oper ations GROUNDING Figure 10 Ml Breaker frame substantially grounded in b...

Page 10: ...ints near the close of the closing stroke 1 Breaker contacts are closing against considerable spring pressure and 2 The breaker may be required to close against fault currents within its full capabili...

Page 11: ...heat from the arc thereby increasing the electrical resistance of the arc path At an early current zero the arc is interrupted The arc path is so long and arc gases have been so cooled that re ignitio...

Page 12: ...combining them into the best possible compromise Federal Pacific engineers have succeeded in pro ducing a material which we believe has the best properties available today FIGURE 17 Heat shock resist...

Page 13: ...se marks coincide with the edge of the blade castings on both positions The distance between the two marks should measure 1 8 to 1 32 To alter this adjustment it is necessary to alter the effective le...

Page 14: ...in shaft is then free to move to the open position Mechanism Adjustments 1 Adjust roller to closing lever face a Tangent point of roller 1 8 from bottom comer b Adjust by varying spacers in latch 2 Ad...

Page 15: ...poles b Make certain the two bolts at each end of the insulating support are tight X 3 Latch must have at least 1 32 clearance 4 At least 1 8 clearance between closing lever and trip free roller Note...

Page 16: ...e Fig 19 A b Should be free to align to stud that is 3 16 off center in any direction without reducing contact pressure Interlocking must be adjusted to insure tripping of the breaker before the racki...

Page 17: ...FIGURE 24 FIGURE 22 FIGURE 25 FIGURE 23 17 Courtesy of NationalSwitchgear com...

Page 18: ...surface to be 1 8 approximately from lower comer of surface Pig 25 B 12 Adjust roller to closing lever by moving latch assembly Pig 25 C Suppressor Rectifier This rectifier is shown across the soleno...

Page 19: ...a d c tripping battery be supplied A constant reliable source of tripping power is essential for a well designed dependable substation Rectified AC Closing This type of operation finds its greatest ap...

Page 20: ...DC 125 DC 250 DC 25 6 1551 0409 1554 0409 1551 1003 14 30 28 60 70 140 180 260 12 3 5 2 5 125 DC 190 250 1551 1003 WIRING DIAGRAMS Symbol With Latch Check and Lockout Scheme Without Latch Check 1501 1...

Page 21: ...tes and interphase barriers in position and from phase to phase and phase to ground Note Conditions of switching of arc furnaces or capacitors may require special consid eration All parts of a breaker...

Page 22: ...loaded and in the open position the contact surfaces may not seat parallel No current is interrupted by the main contacts and little or no pitting should be expected Racking in Mechanism Any good gra...

Page 23: ...COIL DST 15 500 CLOSING VOLTAGE RANGE TRIP VOLTAGE Remove circuit breaker from cell and tip forward as shown in Figure 28 Disconnect the two coil leads for the terminal block Polarity is unimportant...

Page 24: ...l approximately 80 lbs noting that leads emerge from coil on right hand side of solenoid frame as seen from rear of breaker Insert new coil have leads emerge in proper direction Reassemble carefully i...

Page 25: ...TS MAIN CONTACT ALIGNMENT AUXILIARY SWITCH SECONDARY DISCONNECTS PRIMARY DISCONNECTS LUBRICATION TRIP MECHANISM CLOSING MECHANISM RACKING IN MECHANISM PRIMARY DISCONNECTS OPERATIONAL INSPECTION MANUAL...

Page 26: ...ol wiring continuity check Wiring Diagram No Rev No j Stop clearance to main shaft 1 8 3 16 Ga 1 2 3 Resistance of coils Closing Coil ohms ohms Trip CoU k Closing armature overtravel clearance to plat...

Page 27: ...h only 6 Auxiliary Switches Auxiliary Contacts 15 times at minimum voltage a Trip Coil MA AM contacts make 3 4 1 before arcing contacts touch b Normally open A contacts make 0 1 4 before arcing contac...

Page 28: ...0B 0C g Stop clearance to main shaft 1 8 3 16 Ga 1 2 16 High Potential Test h Closing armature overtravel clearance to plate 3 32 1 8 Primary Hi Pot for one minute Ga 2 3 If any changes in above re a...

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