AC-PRO Retrofit................................................................................... AKR-30/50
Page 2
2.0 Initial Breaker Tests
Before starting the retrofit, perform a visual/mechanical
inspection and an electrical test of the breaker to determine
its condition.
Refer to the breaker manufacturer's instruction manual and
accepted test standards such as the NETA Maintenance
Specifications or PEARL reconditioning standards to verify that
the breaker is in acceptable mechanical and electrical operating
condition.
As a minimum, perform the following:
a)
Close and trip operation of the breaker.
b)
Measure contact resistance of each pole.
c)
Measure insulation resistance from pole to pole, from pole
to frame and across open contacts.
d)
Check contact compression.
e)
Check for sufficient finger cluster spring tension at the
rear stabs.
Rectify any abnormalities found. Clean and lubricate the breaker
as required.
3.0 Remove Existing Trip Unit
1)
Remove the old trip unit.
2)
Remove the CT wires. The CTs will be removed later.
3)
Save the MicroVersa Trip mounting bracket and hardware if
it is to be re-used to mount the new trip unit.
Summary of Contents for AC-PRO AKR-30
Page 20: ...AC PRO Retrofit AKR 30 50 Page 16 FIGURE 1 Front View Blue Front Breaker...
Page 21: ...AC PRO Retrofit AKR 30 50 Page 17 FIGURE 2 Trip Unit Mounting Blue Front Breaker...
Page 22: ...AC PRO Retrofit AKR 30 50 Page 18 FIGURE 3 Front View Black Front Breaker...
Page 23: ...AC PRO Retrofit AKR 30 50 Page 19 FIGURE 4 Trip Unit Mounting Black Front Breaker...
Page 24: ...AC PRO Retrofit AKR 30 50 Page 20 FIGURE 5 CT Installation...
Page 26: ...AC PRO Retrofit AKR 30 50 Page 22 FIGURE 7 Mechanical Reset Actuator Pre Assembly...
Page 28: ...AC PRO Retrofit AKR 30 50 Page 24 FIGURE 9 Wiring Diagram...
Page 29: ...AC PRO Retrofit AKR 30 50 Page 25 FIGURE 10 Front View Blue Front Breaker With Communications...
Page 30: ...AC PRO Retrofit AKR 30 50 Page 26 FIGURE 11 PT Module Installation Blue Front Breaker...
Page 31: ...AC PRO Retrofit AKR 30 50 Page 27 FIGURE 12 Front View Black Front Breaker With Communications...
Page 32: ...AC PRO Retrofit AKR 30 50 Page 28 FIGURE 13 PT Module Installation Black Front Breaker...
Page 33: ...AC PRO Retrofit AKR 30 50 Page 29 FIGURE 14 Wiring Diagram For Communications...
