Warnings; Ac Wiring; Cable Type To Be Used For Ac Wiring; Ac Wiring Options - Eaton Flexi-3G Installation & Commissioning Manual

Flexi -3G Installation & Commissioning Manual

Chapter 6. Installation of AC Cables

6.1. Warnings

• Ensure that the AC supply cable is isolated. It should be either not connected to the

distribution panel or the fuses must be pulled/MCBs switched off on each live line

and the distribution panel must then at all times be under the control of the installer.

• Hazardous voltages are retained on the AC input after power down due to filtering

capacitors on the rectifier magazines.

• Proceed with caution and test AC input terminations before touching. Check that the

cable is dead (no potential exists).

• Ensure that insulated bootlace ferrules are fitted to Fuse Board ends of cables.

Cables constructed with cores to BS6004 class 2 (H07V-R), or similar according to local regulations.

Refer to the AC Installation section for the Power Box type

1. Each phase to the cabinet must be fed via a BS88 fuse or equivalent. Select the

fuse rating appropriate to the local regulations accounting for maximum number of

rectifiers per feed, cable sizing, length of AC run, containment methods and

thermals etc.

This fuse type is necessary to ensure adequate discrimination with the internal

fuses of the rectifiers (fast-acting 15A fuse in both the phase and neutral). If there is

insufficient discrimination between these fuses and any upstream AC supply

disconnect device then the upstream AC supply-disconnect device will operate

when a rectifier fuse blows. This will disconnect the AC supply to all rectifiers.

2. Label the distribution board.

6.2.4. For all other conditions and arrangements a design to BS7671 must be

undertaken by :

Eaton Power Solutions Ltd. or

A suitable qualified electrical designer to BS7671.

Page 54 of 94

Document No: - 4493-CM-EN-10989402

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