Article By: cpswitchgear.com
Circuit Breaker Description
The GE low voltage circuit breaker classification codes (also known as model number) can be divided into different codes. We’ll use General Electric type AK/AKR/AKF circuit breakers for this example.
General Electric type AK/AKR/AKF breakers can be divided into six codes as follows:
### # - # # - ### #
AKRU-6A-50-S is and example of a circuit breaker designation.
1. The first three characters of the breaker designation indicate the general breaker type; AK, AKR, AKS.
2. Additional characters may be added to the type descriptor when any of the following options are provided:
F = Field discharge breaker (AK only)
T = 2000A frame size (50 frame size model only)
U = Primary current-limiting fuses
3. The first digit of the center character of the breaker designation indicates the type of overcurrent trip device installed:
1 = EC-1 trip device
2 = EC 2/2A trip device
3 = Power Sensor trip device
4 = ECS trip device
5 = SST trip device
6 = MicroVersa Trip trip device
7 = RMS-9 MicroVersa Trip trip device
N = Non-automatic
4. The second digit of the center character of the breaker designation describes the mounting arrangement of the breaker:
Blank = stationary or drawout AKD switchgear
A = drawout AKD-5/AKD-6 switchgear
B = drawout AKR OEM substructure
C = drawout AKD-6 switchgear (AKR-75/100 only)
D = drawout AKD-8 and OEM switchgear
S = stationary breaker
W = wide stationary breaker (AKR-100 only)
5. The fifth set of characters of the breaker designation indicates the breaker frame size in amperes:
15 = 225 ac, 225 dc
25 = 600 ac, 600 dc
30 = 800 ac, 800 dc
50 = 1600/2000 ac, 2000 dc
75 = 3000/3200 ac, 4000 dc
100 = 4000 ac, 6000 dc
6. The last character of the breaker designation indicates the special features described below:
D = dc breaker (AKR only)
F = dc field breaker (AKR only)
H = 75,000 interrupting current (AK-50 only)
C = 100,000 interrupting current (AK-50/75 only)
S = 5-cycle “quick-close” mechanism (AK-50/75/100 only)
X = special factory design
If you have any questions about circuit breaker identifiers, please use our convenient Carolina Precision Switchgear contact form.
For more information on GE low voltage circuit breaker designation help, please visit www.cpswitchgear.com or call Carolina Precision Switchgear at 704-596-4242.
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CAN YOU SWAP OUT A G.E. AK-2A-50 WITH A AK-3A-50-S
ReplyDeleteBoth breakers are AK, so that much is fine.
ReplyDeleteThe 2A is the older type tripping device (OD's) and the 3A is with the power sensing trip unit. That will be ok also if you can get the same tripping times on both tripping units. Your engineer should be able to tell you the correct curves on both tripping units. The A is for drawout type breakers, so the racking mechanisms are the same.
Both breakes are 50 (1600/2000 ac, 2000 dc)so this will be fine also.
The only difference is the S on the back end of the 50 and that stands for quick close mechanism. This has more to do with the anti-pump feature, and depending on your engineering configuration will determine if you want this feature or not. The anti-pump is in the control circuit of the "S" type breaker and would not hinder the breaker opening and closing like the non "S" breaker.
I hope this helps.