1. Regulations
  2. title 46
  3. chapter I-i3
  4. part 111
  5. subpart 111.51
  6. § 111.51-4

View all text of Subpart 111.51 [§ 111.51-1 - § 111.51-5]

§ 111.51-4 - Short-circuit calculations for systems 1500 kilowatts or above.

Short-circuit calculations must be submitted for systems with an aggregate generating capacity of 1500 kilowatts or more by utilizing one of the following methods:

(a) Exact calculations using actual impedance and reactance values of system components.

(b) Estimated calculations using IEC 61363-1:1998 for AC systems and IEC 61660-1:1997 for DC systems (both incorporated by reference; see § 110.10-1 of this subchapter).

(c) The estimated calculations using a commercially established analysis procedure for utility or industrial applications.

AUTHORITY: 46 U.S.C. 3306, 3703; DHS Delegation No. 00170.1, Revision No. 01.2. Section 111.05-20 and Subpart 111.106 also issued under sec. 617, Pub. L. 111-281, 124 Stat. 2905.

SOURCE: CGD 74-125A, 47 FR 15236, Apr. 8, 1982, unless otherwise noted.

CITE AS: 46 CFR 111.51-4