Page 3 - MINISTACK Fuse Switch Disconnector Unit

Ministacks

ALSTOM Industrial Products Division The fuse switch disconnectors are
is continually developing the Ministack defined as follows:
range of switches to provide for the
requirements of consulting engineers, CMS
contractors and switchboard builders. Standard types which have been
The latest range of Ministacks include: tested with the arc being initiated
on the load side terminals.
Uprated busbar (910A) for 100A
& 200A stacks, 2 to 10 high. CMSE
New style sandwiched copper Special types tested where the arc
cable connectors fitted to the rear was initiated within the fuse switch
moulding of 100A & 200A units. disconnectors and substantial 3-phase

3&4 high 400A & 630A Ministacks. arcing currents were not interrupted CMS
by the fuse links for the full duration
NEW comprehensive range of
of test time nominated.
mixed stacks.
The Ministack now offers industry a Service Requirements and
clear choice in low voltage switchboard Temperature Rise Guidelines
design. This design suits Form 1 to (CL.6.1.1) – AS3947.1
Form 4 types of separation. With the Under normal service conditions as
addition of optional terminal shrouds defined in AS3947-1 (i.e. “The ambient
plus the necessary barriers provided air temperature does not exceed
by the switchboard builder, Form 4 +40°C and its average over a period
separation is achievable.
of 24 hrs does not exceed +35°C”),
Fuse switch disconnector units are individual switch units in a stack are
available which have been successfully fully rated. Derating is however
tested, and meet the requirements of necessary when switch ratings exceed
the standard test as indicated by the assigned main busbar rating. CMSE
Clause EE3 in Appendix EE of AS3439.1 Load diversity to be taken into account.
or special test as specified in Clause
EE6 of Appendix EE. For reliable operation, regular main-
tenance is required. Refer page 22.

Range:
Main Busbar Incomer Direction
Switch Rating Amps Outgoing Terminal Connection Types Height of Stack Above Below Above & Below Busbar Rating Amps
100 & 200 Front Connected – Right Hand 2-10H Above Below Above & Below 910
Front Connected – Left Hand
Back Connected
400 & 630 Front Connected – Right Hand 2-4H Above Below Above & Below 1000
Front Connected – Left Hand
Back Connected
800 Front Connected – Right Hand 1&2H Above Below Above & Below 1000
Front Connected – Left Hand
Back Connected
Mixed Stacks Front Connected – Right Hand See page 4 Above Below Above or Below 1000/910
Front Connected – Left Hand
Back Connected

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