Project/ElectricalWorks/DB3aRework: Difference between revisions
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Revision as of 08:55, 6 June 2021
Introduction
A project to re-work DB3A.
Objectives :
- Bring the Emergency Top control into use for the 3-phase tools (as appropriate)
- Separate the 16A sockets for the Bandsaw and Welder onto individual circuits
- Separate the Pillar Drill and Pedestal Grinder onto individual circuits
- Provide a new 16A socket for the Planer Thicknesser
- Provide capacity for a new 16A socket in future
Current State
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Overview
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Top section detail
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Bottom section detail
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Top left detail
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Top right detail
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Bottom left detail
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Bottom right detail
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DB3A dimensions
The existing board is based on 2 25mm DIN rails, each of 250mm length. These are mounted on a removeable back plate. Three 4-pole NC contactors are fitted, but only being used as junction blocks at present. The primary cable entry is via the trunking at the bottom of the box, with a single armoured cable entering on the top-right side.
Planned Work
- Test Emergency Stop contactor power is working and correct.
- Strip existing board
- Strip back armoured cable sheath to ~20mm from point of entry
- Move lower DIN rail down on baseplate to make room for wiring between DIN rails
- Install Schneider 63A 4-pole contactor, connected to E-Stop system
- Replace MCB 4L1/L2/L3 in Main Board with Schneider 32A Type-C breaker.
- Wire new 32A breaker to new E-Stop contactor with 10mm conduit cable
- Install new earth block onto wall of DB3A. Bond cabinet and door to earth block.
- Connect metal lathe wiring directly back to MCB 5L1/L2/L3 in Main board - 4-pole junction / 20A
- Install new 16A 3-phase RCBO's for Piller Drill and Pedestal Grinder
- Install new 16A 1-phase RCBO's for Welder, Planer Thicknesser and spare circuit
- Install new 6-way DIN rail terminal block for neutral connections
- Install new 4-way DIN rail terminal blocks for L1, L2 and L3 switched connections
- Pull new 2.5mm cable through for Welder socket. Remove old wiring from shared 16A box.
- Install new 20mm conduit in ceiling to centre pillar.
- Pull new 2.5mm cable through for Planer Thicknesser socket. Install new 16A surface socket on centrel pillar.