Seismic capabilities – Rockwell Automation 2500 CENTERLINE Motor Control Centers Installation Manual User Manual
Page 38
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Rockwell Automation Publication 2500-IN001C-EN-P - April 2014
Chapter 3
Install Columns
Seismic Capabilities
Actual CENTERLINE 2500 MCC units have been seismically qualified by
dynamic (triaxial multi-frequency testing) seismic tests by using ICC–ES
AC156
(1)
acceptance criterion that covers general equipment and supports the
seismic certification of electrical systems such as Motor Control Centers
(MCCs). The testing was carried out in accordance with ICC–ES AC156
criteria and supports data for the following qualification requirements:
•
2006 and 2009 International Building Code, International Code Council
•
1997 Uniform Building Code, Structural Engineering Design Provisions,
Zone 4
•
ASCE Standards SEI/ASCE 7-05 and SEI/ASCE 7-10, Minimum Design
Loads for Buildings and Other Structures
The range of the ICC–ES AC156 testing enveloped (fulfilled and exceeded) is in
the following table.
CENTERLINE 2500 MCC units demonstrated compliance with the following:
•
100% g level of Uniform Building Code 1997 (UBC) Zone 4
(the maximum UBC Zone)
•
100% g level of the International Building Code 2009 (IBC),
(SEI/ASCE: S
DS
≥ 1.5 g @ 5 Hz and S
D1
≥ 2 g @ 1 Hz) when subjected to
a UBC Zone 4 earthquake or the IBC seismic event
Throughout the seismic testing, the MCC units were under power and operated
before, during, and after the seismic tests.
To obtain a IBC or UBC seismic withstandability, each individual CENTERLINE
2500 MCC line-up (including those in double-front applications) must be
mounted on an adequate seismic foundation. Installation must be carried out per
the anchoring requirements as indicated in this instruction manual. All columns
in the MCC line-up must also be bolted together per instructions in
.
In the CENTERLINE 2500 MCC line-up, mounting channels are incorporated
in the standard design. As an alternative to bolt down anchoring, these mounting
channels can be welded to an adequate seismic foundation. For seismic weld
down applications, see
(1) Acceptance Criteria for Seismic Certification by Shake-Table of Non-structural components (AC156), International Code of Council
Evaluation Service (ICC-ES), October, 2010.
Test Criteria
S
DS
(1)
(g)
(1) Equipment is qualified for S
DS
and z/h values shown. Qualifications can be valid for higher S
PS
where z/h is less than 1.0.
z/h
(1)
Horizontal
Vertical
Rp/Ip
A
FLEX
(1)
A
RIG
(1)
A
FLEX
/A
RIG
A
FLEX
(1)
A
RIG
(1)
A
FLEX
/A
RIG
ICC-ES-AC156
1.0
1.0
1.6
1.2
1.33
0.67
0.27
2.5
1.0
ICC-ES-AC156
1.5
1.0
2.4
1.8
1.33
1.005
0.402
2.5
1.0