IB 6.1.12.1-1C
3
1
ABB
Table A6 - Maximum Allowable Current Path Resistance for K-Line Circuit Breakers as Non-Automatic or
With Solid-state or Microelectronic Trip Systems
Circuit breakers with an OD trip system must add the applicable coil assembly resistance (Table A5) to the non-
OD resistance in Table A6 below.
Maximum Allowable Resistance
a,b
Frame Size
New or Restored As-found
Maximum Test
Current
c
[A]
[µΩ] [µΩ]
[A]
225 120 200 100
600 63 100 200
800 63 100 200
1600 28 50 200
2000 24 50 200
a
Measure between upper and lower terminals exclusive of the primary disconnects.
b
Double the allowable values for breakers with a Cd plated current path.
c
When testing OD circuit breakers, do not inject a test current through the current path above the
maximum test current for the coil assembly shown in Table A5.
Courtesy of NationalSwitchgear.com
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