H3C S7500 Series Ethernet Switches Installation Manual

Installation Manual
H3C S7500 Series Ethernet Switches Appendix B N68 Cabinet Installation
B-64
 Note:
z This diagram is for S7500 AC cabinets only.
z The Brown wire is the live wire L; Blue wire is the neutral wire N; Yellow green wire is
the earth wire PE.
z An AC cabinet supports dual 220 VAC inputs. Each input first connects to one 32 A
bipolar NCB and then to three 16 A bipolar NCBs to supply power to devices.
z 220 VDC power is dangerous. When the cabinet is in operation, the cabinet door
should be locked by professional maintainers, and the maintainers should pay
attention not to touch any of the power terminals during maintenance.
z Point 1, 2, 3 in the diagram each represents a device.
z If you use dual AC power outputs (with out-phase L, N), and the device in the
cabinet support dual-input power supply, you are recommended to connect the two
inputs of the device to two NCBs with different AC input. If there are more than three
devices in the cabinet, you can parallel connect several devices to one NCB, with
proper consideration of the device power.
z If your device power is small, the device is protected by its own power protection set
or the superior air breaker rather than the NCB. You can change the NCB, but H3C
does not provide NCBs of various capacities.
z Two sets of power distribution components locate at the front and rear of the cabinet
respectively.