Emerson ADTS Transfer Switch Interlocked Shafts Interlocked Weights, Shaft Indicators, Position

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INSTALLATION (continued)

Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.

Table C. Maintenance handle positions on 150–1200 amp. transfer switches. .

 

J–design 150---600 A

H–design 800---1200 A

 

 

Transfer Switch

Interlocked Shafts 1

Interlocked Weights 2

Maintenance

Shaft Indicators

Position

Link between contact

Lobes prevent

 

Handle

 

 

 

shafts prevents closing

closing both N & E

 

 

 

both N & E contacts

contacts

 

 

 

 

hub

weight

hub

up

 

E

 

 

 

 

E = O

 

 

 

 

upper contacts open

 

 

 

 

 

Normal

t

lobe

lobe

up

 

 

contact shafts

 

 

 

N

link

 

 

 

N = C

hub

 

hub

 

lower contacts closed

 

 

 

 

 

 

 

 

 

weight

 

 

 

 

 

 

 

up

 

E

 

 

 

 

E = O

 

 

 

 

upper contacts open

Load

 

 

 

 

 

 

 

 

 

Disconnected

 

 

 

 

N = O

N

 

 

 

 

 

 

 

 

lower contacts open

 

 

 

 

 

 

 

 

 

down

 

E

 

 

 

 

E = C

 

 

 

down

upper contacts closed

 

 

 

 

Emergency

 

 

 

 

 

 

 

 

 

N

 

 

 

 

N = O

 

 

 

 

lower contacts open

 

 

 

 

 

 

 

 

 

down

 

Note 1: The hub and contact shaft turn in opposite directions through a cam follower mechanism.

Note 2: The hub and contact shaft turn in the same directions.

Note: If Normal and Emergency connections are reversed this operation is also reversed.

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Contents Rating Label Table of ContentsNameplate 4ADTS a Catalog Number IdentificationInstallation Auxiliary Circuits InstallationController Ground HarnessesManual Operation Test Installation Functional TestDesign 800-1200 amp Design 150-600 ampHandle Transfer Switch Interlocked Shafts Interlocked WeightsShaft Indicators PositionClosed Normal contacts Contact position Indicators left sideVoltage Checks 14. Standard controls and indicatorsElectrical Operation How to unlock the User ControlsDisconnecting the Controller Testing & ServicePreventive Maintenance Replacement PartsTROUBLE-SHOOTING Testing & ServiceManual Load Transfer See Controller User’s Guide Index