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Step 1.
Carry out all works in line with HSE requirements using MS/RA for each installation.
Step 2.
Remove tap-off from packaging and ensure no damage is visible to the device.
Step 3.
Off er the tap off box up to the housing and visually line up the earth/ground strip and
the interlock channel on the iMPB casing. Insert the ground strip as shown. Pull back the
mechanical interlock and rotate the box into position, then release the mechanical interlock
when parallel with the busbar. Ensure the box is fully supported during this procedure. Verify
that the ground strip has rotated within the interlcok channel and the machanical interlock
Tap off Enclosure
Busbar
Ensure earth/ground strip and
interlock channel are correctly aligned
has released. Verify the Tap Off box is in place. Note the box cannot be inserted in the
wrong polarity as the design of the ground strip, interlock and housing prevent this.
Step 4.
The cutout for the contacts on the claw and the contact guard line up when the tap
off is fi tted to the busbar. To engage the contacts the engager handle is rotated 90
degrees.
Step 5. (optional)
If the Tap off boxes have meteringethrenet ports on the front of the boxes need
populated with RJ45 connections and cables which run up the side of the busbar
and daisy chain from box to box. For more detailed assistance please contact the
Powerbar engineering team.
Rotary handle
www.powerbarsystems.com
Spring loaded interlock
Tap Off Modules
The Powerbar iMPB range of tap-off modules comprise an arrangement of enclosure, circuit breaker, monitoring device, on load isolator and safety interlocks which provide a unique
set of safety features for installation
and allow the tap-off modules to be installed or removed while the busbar is energized.
The proprietary spring loaded mechanical interlock ensures that the tap-off box can only be inserted on to the iMPB busbar system with the on-load isolator in the off position.
The proprietary spring loaded mechanical interlock is a defi nitive locating mechanism that ensures the tap-off module is correctly located and fi xed to the busbar frame.
The proprietary spring loaded mechanical interlock ensures that the tap-off is fully grounded/earthed to the iMPB case prior to any phase contact operation.
The proprietary spring loaded mechanical interlock ensures that the tap-off conductors can be inserted onto the iMPB bar whilst ensuring no conductors are exposed to the installer.
The busbar housing, earth strip and mechanical housing ensure that the tap-off cannot be inserted the wrong way with reverse polarity.
The rotary handle of the on-load isolator has a further positive engagement tab which must be operated to allow the rotary handle to be operated.
The
tap-off box is fully grounded/earthed before any phase connections are made and the earth/ground remains intact after any phase connections are broken in the event of Tap-
off box isolation/withdrawal. This safety features ensures electrical safety throughout the operation.
Engagement Tab
Earth/Ground Strip
Interlock Channel
Note: The Sprung Engagment Tab on the
rotary handle is fully pushed in before
rotating the handle 90 degrees to engage or
disengage the tap off box.
Содержание iMPB
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