Eaton DS-206S series Instructions Manual

Contents

13Instruction Booklet IB 33-790-1JEffective November 2010Instructions for Low Voltage PowerCircuit Breakers Types DS and DSLEaToN CorPoraTIoN www.eaton.comSection 4 - Basic Operating Instructions4.0 GENERALThe breaker is now ready for trial mechanical operation.Keep the breaker standing on the compartment rails, outin front of the compartment. Examine it externally for anysigns of obvious damage or foreign material. Wheneverything appears to be in order, perform the followingoperations as “dry run” practice. If any malfunctioning isfound during these operations, see that it is correctedbefore further operations or before placing the breaker inservice.Fig. 9 Method Used to Press Trip Plate and LowerShutter with One Hand, Preparatory toInserting Crank.4.1 LEVERING DEVICEIf the circuit breaker was shipped in a separate package,the levering device was probably left in the REMOVEposition. If not it will be necessary to return it to this posi-tion. Push in the TRIP plate and depress the shutter overthe levering shaft, using one hand, as shown in Figure 9,and insert the levering crank as shown in Figure 3. Turnthe crank counterclockwise until the position indicator isin the REMOVE position, at which time the load on thecrank handle increases because a stop has beenreached. Now rotate the crank clockwise to simulatelevering the breaker inward toward the CONNECT POSI-TION. Watch the movement of the levering device arms.At the start of cranking the arms are horizontal, with roll-ers toward the rear, Figure 6. As the crank is turnedclockwise the levering device arms rotate downward.When they have moved approximately 40° from the hori-zontal, the shutter will rise until it touches the cranksocket. The position indicator will be opposite “DISC”which is the DISCONNECT position wherein the breakeris held in its compartment with both main and secondarycontacts disengaged. If the crank is withdrawn, the shut-ter will close completely, and the breaker may be lockedin this position as later described in Section 5.1.8.5 of thisinstruction book. There is very little movement of thebreaker into its compartment between the REMOVE andDISCONNECT positions.Continued rotation of the crank in the clockwise directionmoves the arms downward to the vertical position, andthe indicator will show “TEST” as in Figure 7. The shutterwill rise.Further clockwise rotation of the crank handle rotates thearms to the CONNECT position. This is about 65degrees from the test position, as shown in Figure 8.When this position is reached, the crank suddenlybecomes hard to turn. At this point, stop turning thecrank, as the worm shaft bottoms in the tapped hole ofthe stop nut.Note: Further turning effort is useless. The breakerwill be secure, even if the stop is only lightlytouched. Remember this when actually levering thebreaker into the connect position.Rotation of the crank counterclockwise will turn the lever-ing device arms to withdraw the unit from the CONNECTposition to the TEST position and then to the DISCON-NECT and REMOVE positions. Then, when the crank isremoved from the worm shaft, the shutter will remaindown and the trip plate will remain trapped by the shutter.Note: If the breaker is levered out from the TESTposition to the REMOVE position with the closingsprings charged, a trip-free “closing” operation auto-matically will be performed but the breaker contactswill not close. When a power-operated breaker isremoved from cell, it must go through a trip-freeoperation.4.2 CHARGE THE CLOSING SPRINGSThe closing springs must be charged before the breakercan be closed. To manually charge the closing springs,