Emerson 7000 Manuel D’Utilisation

 

381333-395 

                                                                   Installation  1-1

 

The ASCO 7000 Series Medium-Voltage Automatic 
Transfer Switch (ATS) is factory wired and tested.  

The supporting foundation for the enclosure must be 
level and straight.  Refer to the applicable enclosure 
outline drawing included with the transfer switch for 
all mounting details including door opening space. 

 

Refer to the outline and mounting diagram and mount 
the automatic transfer switch according to details and 
instructions shown on the diagram. 

 

 
 
Protect the transfer switch from construction grit and 
metal chips to prevent malfunction or shortened life 
of the transfer switch. 

 

Do not connect the power conductors to the transfer 
switch until they are tested.  Installing power cables in 
conduit, cable troughs, and ceiling-suspended hangers 
often requires considerable force.  The pulling of 
cables can damage insulation and stretch or break the 
conductor’s strands.  For this reason, after the cables 
are pulled into position, and before they are connected, 
they should be tested to verify that they are not 
defective or have been damaged during installation. 

 

Refer to the wiring diagram provided with the transfer 
switch.  All wiring must be made in accordance with 
the National Electrical Code and local codes. 

 

 

 

De-energize all conductors, open all circuit 
breakers, and rack out all voltage transformers 
before making any connections.  De-energize any 
UPS, station battery system, or any similar 
system providing standby control power.  Be sure 
that the Normal and Emergency line connections 
are in proper phase rotation.  Place the engine 
generator starting control in the OFF position.  
Make sure engine generator is not in operation. 

All customer connections, including the engine control 
contact connections, are located on terminal block TB. 
This terminal block is located on the interior left side 
of the control section.  Refer to the wiring diagram 
provided with the automatic transfer switch.  Connect 
the engine start wires to the appropriate terminals.  See 
Figure 1-1 and Table A. 

Table A. Engine-generator control contacts 

contact closes 

TB1 and TB2 

contact opens 

TB1 and TB3 

 

 

 
 
 

Connect auxiliary circuit wires to appropriate 
terminals on terminal block TB as shown on the wiring 
diagram provided with the automatic transfer switch. 

 
 
 

Figure 1-1.  Customer terminal block TB in controls section.

Refer to the manual from the manufacturer of 
the metal-clad switchgear for section handling, 
installation, power connections, and testing. 

engine- 
generator 
control 
contacts 

    DANGER