UL 2831-2013 pdf download
UL 2831-2013 pdf download.oUTLINE OF INVESTIGATION.
7.3 Test program 02
7.3.1 General
7.3.1.1 One (1) cIrcuit beaker sample of maximum continuous current rating of each frame size and applicable 120 VAC or 125VDC accessories and functional components shall be subjected to Test Program 02 as defined by this Outline and in the order shown in Table 7.2.
7,3.2 Electromagnetic interference
7.3.2.1 Circuit breakers with electronic devices shall meet and demonstrate compliance with the Electromagnetic Interference (EMI) requirements of MIL-STD-461 for surface ship, below deck, metallic hull installations. Testing shall not cause mal•operahon of the circuit breaker including accessories and functional components.
7,3.2.2 EMI test procedures shall be written in accordance with Dl-EMCS-80201 and submitted to Naval Sea Systems Command (NAVSEAI EMI Technical Warrant Holder (‘TWH) and 1’WH representative prior to the start of testing NAVSEA EMI TWH or TWH representative shall provide final approval of test procedures prior to the start of testing.
7.3.2.3 EMI test reports shall be written in accordance with Dl-EMCS-80200. NAVSEA EMI TWH or TWH representative shall provide final approval/disapproval of test results.
7.3.2.4 CircuIt breakers failing to meet the EMI requirements of MlL-ST461 and this Outline may be conditionally accepted via a Deviation From Specification (DFS) request providing technical justification of low risk for those failures in its intended installation. Manufacturers shall submit DFS requests to UL NAVSEA EMI TWH. and TWH represenlative. NAVSEA EMI TWH shall provide final approvaLdisapproval of DFS requests.
7.3.2.5 Manufacturers may submit extension requests for families of circuit breakers that have the same electronics design. If approved, extension requests will allow manufacturers to perform EMI testing on one circuit breaker from the family. Manufacturers shall submit extension requests to UL, NAVSEA EMI TWH, and TWH representative. NAVSEA EMI TWH shall provide final approval/disapproval of extension requests.
7.3.4 Power frequency withstand voltage (full voltage)
7.3.4.1 Power frequency withstand voltage testing of primary conductors shall be conducted in accordance with ANSINEMA C37.54 at the applicable value from Table 5.1 with the exception that the circuit breaker shall be installed in the test switchgear for conductors greater than 1 kV.
7.3.5 Verification of accessories and functional components
7.3.5.1 Verification of accessories and functional components shall be conducted in accordance with
7.2.5.
7.3,6 Vacuum interrupters integrity
7.3.6.1 Vacuum interrupters integrity testing shall be conducted in accordance with 7.2.9.
7.4 Test program 03
7.4.1 General
7.4.1.1 One (I) circuit breaker sample of maximum continuous current rating of each frame size and applicable 120 VAC or 1 25VDC accessories and functional components shall be subjected to Test Program 03 as defined by this Outline and in the order shown in Table 7.3.
7.4.2 Shock fragility
7.4.2.1 Shock fragility testing shall be conducted in accordance with MIL-STD.202, Method 213B, half-sine, 11 ms. 3 axis. Circuit breakers shall be Installed in stationary elements and/or switchgear interfaces during testing. The circuit breaker with applicable accessories shall be tested in both the ‘closed” and open” positions. The fragility rating in g’s shall be determined using the following criteria:
a) Circuit breakers shall not change position/state from closed” to open or from open to
closerf during the test.
b) Main and auxiliary contacts shall not close when open.
C) Circuit breaker main and auxiliary contacts shall not open when closed. Momentary opening
of the main and auxiliary contacts of less than 0,020-second is acceptable.
d) Open circuit breakers shall be cycled “closed’ to “open” after each shock impulse to verify correct operation. Closed circuit breakers shall be cycled open” to ‘closed” after each shock impulse to verity correct operation.
e) No components or pieces of components shall become adrift,
7.4.2.2 Main contacts on each phase shall be monitored during each shock blow. One a” contact and one ‘b auxiliary contact shall be monitored during each shock blow. Contacts shall be energized with at least 12 volts at any convenient current in order to clearly determine bounce and chatter during shock. Main and auxiliary contacts shall be monitored by oscillograph or suitable digital data acquisition system. All equipment shall have a minimum frequency response and sampling rate of 2 KHz, Digital signal processing of acquired data shall be capable of producing suitable waveform plots with 0.5 millisecond minimum resolution, and for analysis purposes shall be able to expand contact events with graphical editing to determine time increments of the individual sample points.
