51
The two negative copper busbars collect and parallel the current from the individual
negative PV current inputs. All four hex nuts in the negative copper busbars must be
properly tightened regardless of whether there is a wire connected to it or not. Always
wire the negative copper busbars whose input terminal blocks do contain wires.
Wires connected to the negative copper busbars must be terminated with M6 tubular
cable lugs. Examples of proper cable lugs are Cembre’s A3-M6 for 16 mm², A5-M6 for
25 mm² and A9-M6/15 for 35 mm².
WARNING
Only the hex nuts of the negative copper busbars need to be tightened.
The remaining non-hex nuts are factory-tightened and shall neither be
retightened nor untightened. When selecting tubular cable lugs please make
sure there is enough contact surface between the negative copper busbar
and the lug; moreover the cable lug shall not contact the non-hex nuts of
the negative copper busbars (do not use lugs wider than 15 mm). Failure
to observe these requirements will create a fire hazard in the equipment.
It is required to wire one of these Weidmüler surge protective devices to the negative
copper busbars (for more information please check CLC/TS 50539–12:2010 or
equivalent local standard). If in the combiner box the negative copper busbars are
connected to a DC switch-disconnector, it is fine to wire the SPD to the switch-
disconnector instead.
1351270000 VPU II 3 PV 1000V DC
1351290000 VPU II 3 R PV 1000V DC
1351340000 VPU II 2 PV 600V DC
1351370000 VPU II 2 R PV 600V DC
1351520000 VPU I 2+0 PV 600V DC
1351490000 VPU I 2+0 R PV 600V DC
WARNING
Surge protection is required on the PV side. Failure to observe this
requirement will create an electric shock hazard as the double insulation
barrier could break down due to excessive voltage surges.
Содержание Transclinic 14i+
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