Eaton ATC-900 - General Switch Problem Solving

IB140015EN For more information visit: www.Eaton.com
Instructional Booklet
Effective: August 2014 Page 29
ATC-900 Magnum Tranfer Switch O & M Manual
Figure 38. Transfer from Normal Switching Device to Normal Bypass Switching Device, Steps 1-8.
Rack Out and
Inspect/Maintain
Switch
Place Generator
In OFF Position
Cutler-Hammer
Digitrip 3000
Operational
High Load
Communications
Trip
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Pickup (x In)
Time
Program
Phase
Ground
I
I
I
RMS Amperes
Settings/Test Time/Trip Cause
Test
Program
Test
Pickup (x In)
Instantaneous
Short Delay
Amp Demand
I
Cutler-Hammer
Phase
Phase
Phase
Phase
Ground
Digitrip 3000
Operatio
High
Commun
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Time
Program
Phase
Ground
RMS
Settings/Test
Time/Trip Cause
Short Delay
Cutler-Hammer
Digitrip 3000
Operational
High Load
Communications
Trip
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Pickup (x In)
Time
Program
Phase
Ground
I
I
I
RMS Amperes
Settings/Test Time/Trip Cause
Test
Program
Test
Pickup (x In)
Instantaneous
Short Delay
Amp Demand
I
Cutler-Hammer
Phase
Phase
Phase
Phase
Ground
Digitrip 3000
Operatio
High
Commun
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Time
Program
Phase
Ground
RMS
Settings/Test
Time/Trip Cause
Short Delay
Cutler-Hammer
Digitrip 3000
Operational
High Load
Communications
Trip
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Pickup (x In)
Time
Program
Phase
Ground
I
I
I
RMS Amperes
Settings/Test Time/Trip Cause
Test
Program
Test
Pickup (x In)
Instantaneous
Short Delay
Amp Demand
I
Cutler-Hammer
Phase
Phase
Phase
Phase
Ground
Digitrip 3000
Operatio
High
Commun
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Time
Program
Phase
Ground
RMS
Settings/Test
Time/Trip Cause
Short Delay
2
Source 1
3 to 5
Rack Source 1
Switch Back
into Its
Location
Switch Will
Automatically
close
Cutler-Hammer
Digitrip 3000
Operational
High Load
Communications
Trip
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Pickup (x In)
Time
Program
Phase
Ground
I
I
I
RMS Amperes
Settings/Test Time/Trip Cause
Test
Program
Test
Pickup (x In)
Instantaneous
Short Delay
Amp Demand
I
Cutler-Hammer
Phase
Phase
Phase
Phase
Ground
Digitrip 3000
Operatio
High
Commun
Time Overcurrent
Curve Shape
Pickup (x In)
Time Multiplier
Time
Program
Phase
Ground
RMS
Settings/Test
Time/Trip Cause
Short Delay
6 to 8