CSA C22.2-NO.305:2016 pdf download.Molded-case circuit breakers, molded-case switches, and circuit-brea ker encl osures for use with photovoltaic (PV) systems
4.1 Products covered by this Standard shall comply with the referenced installation codes and standards noted in Annex B as appropriate for the country where the product is to be used. When the product is intended for use in more than one country, the product shall comply with the installation codes and standards for all countries where it is intended to be used.
6 General
6.1 The construction of a PV circuit breaker shall comply with the requirements as specified in Clause 6. 1 of Ref. No. 2 of Annex B, except as noted in Clauses 6- 8 of this Standard as applicable.
6.2 PV circuit breakers shall be considered as single poles for individual PV sources or strings that are permitted to use multiple sets of contacts in series, unless marked in accordance with 17.5. See also 9.9.
7 Spacings
7.1 The electrical spacings for PV circuit breakers rated 600V or less shall meet the requirements of Clause 6.1.6 of Ref. No. 2 of Annex B. Those PV circuit breakers rated 601一1500V shall meet the requirements of Ref. No. 2 of Annex B for 600V.
8 Wire Terminals
8.1 A field wiring terminal of a PV circuit breaker shall have a capacity acceptable for the number, wire size, and type of stranding associated with the circuit breaker and in addition shall be acceptable for at least the size indicated in Table 8.1.
9.4 When a PV circuit breaker is marked "line" and "load" in accordance with 17.11, the Endurance and Temperature Tests shall be conducted with the device wired in the normal (forward) direction. The Limited Fault Interrupting and Standard Fault Interrupting Tests shall be conducted in the reverse direction. The Calibration and Trip-out Tests may be conducted in any convenient direction.
9.5 When a PV circuit breaker is not marked "Iline" and "load" in accordance with 17.11, for Sequences A, B, and C, one representative of the test set, or an additional representative for each test set, shall be provided and tested with opposing line and load connections rather than as required in 9.4. When only one representative constitutes a set, a second representative is required for opposing line-load connection tests.
9.6 Notwithstanding 9.5, for a circuit breaker that is required to be wired in series such that the same number of poles (contacts) are exposed to the current in both directions simultaneously, testing in both the forward and reverse direction is not required.CSA C22.2-NO.305 pdf download.