W-F-1814/570
Part or Identifying Number (PIN): The Government PIN shall consist of the prefix "WF1814/57-" followed by the PIN designation shown in table I.
TABLE I. Current rating and PIN designation.
Current in amperes |
PIN designation |
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RK5 |
RK1 |
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Instantaneous |
Time delay |
Instantaneous |
Time delay |
|
35 40 45 50 55 60 |
F535 F540 F545 F550 F555 F560 |
0535 0540 0545 0550 0555 0560 |
F135 F140 F145 F150 F155 F160 |
0135 0140 0145 0150 0155 0160 |
TABLE II. Peak let-thru and I2T current.
Between threshold and 50 kA |
100 kA |
200 kA |
||||
RK1 |
RK5 |
RK1 |
RK5 |
RK1 |
RK5 |
|
Maximum acceptable peak let-thru current (I x 103) p |
10 |
20 |
12 |
21 |
16 |
26 |
Maximum clearing I2T (amperes squared seconds) (I2T x 103) |
40 |
200 |
40 |
200 |
50 |
200 |
Referenced documents. In addition to W-F-1814, this document references the following: UL 4248-12
The margins of this specification sheet are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue.
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