Revised_Switchboard_Drawings_(E-02_-_Addendum_No.1_(062026)).pdf
PDF 273 KB Posted
- Solicitation number
- 202636
- Issued by
- Miami-Dade County, Florida
About this file
This document is a revised switchboard drawing (Addendum No. 1, dated June 2026) for the City of Homestead's Wastewater Treatment Plant Backup Generators project, prepared by Hazen and Sawyer engineering firm under contract 41210-000 for A&E services. The drawing depicts a comprehensive electrical single-line diagram and elevation specifications for a low-voltage switchboard distribution system serving three 600kW, 480V, three-phase, four-wire backup generators. The system includes a 1500kVA, 13.2kV to 480/277V pad-mounted liquid-filled transformer sourced from utility, with automatic transfer control and switchboard sections (SWBD-GEN and SWBD-DIST) configured at 480V with 3000A and 2000A capacities respectively. The design incorporates multiple distribution sections with various circuit breakers rated at 100kA, 250kA, and 400kA short-circuit ratings, ultraviolet (UV) bank motor control centers (MCC-1 through MCC-5), and provisions for portable generator connection. Switchboard elevations indicate physical dimensions and component placement across multiple sections, with electrical specifications including power monitors, LSIG (long and short-delay, instantaneous and ground) protection devices, and auxiliary equipment connections.
The drawing specifications establish the technical requirements for the procurement of two complete and operable low-voltage switchboard assemblies as outlined in the related Invitation to Bid (ITB #202636). The project is federally funded through the Florida Department of Commerce and the U.S. Department of Housing and Urban Development's Community Development Block Grant Mitigation Program (CDBG-MIT). Compliance with multiple regulatory frameworks is mandatory, including Presidential Executive Order 11246, Title VII of the Civil Rights Act of 1964, the Copeland Anti-Kickback Act, the Contract Work Hours and Safety Standards Act, and federal procurement standards under 2 CFR 200 and applicable CFR parts. The selected vendor is responsible for furnishing all necessary equipment, materials, transportation, delivery services, and post-delivery training and installation support for the switchboard assemblies and ancillary equipment.
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Text version
DESIGNED
DRAWN
CHECKED
PROJ. ENGR.
DATENo. ISSUED FOR BY
CAD REFERENCE:
ENGINEERS PROJECT:
CLIENTS PROJECT:
CONTRACT:
41210-000
REF. No.
DRAWING:
SHEET:
DATE:
OF
DRAWING.
THE SCALE BAR
SHOWN BELOW
MEASURES ONE
INCH LONG ON
THE ORIGINAL
MARCH 2026CITY OF HOMESTEAD
HAZEN AND SAWYER
999 PONCE de LEON BLVD, SUITE 1150
CORAL GABLES, FLORIDA 33134
LICENSE No.: 2771 O
W N
ER
F
U R
N
IS
H
ED
E Q
U
IP
M
EN
T
PA
C
KA
G E
XX
JOSE ANGEL CANO DIAZ
PE NO. 92167 41210-000
A&E SERVICES FOR WASTEWATER TREATMENT PLANT BACKUP GENERATORS----
E-02----
E-02.DWG
E-02
J. CANO
SWBD-DIST SINGLE LINE DIAGRAM
600kW 480V,3Ø,4W
GENERATOR NO. 1
P-1010 P-1011 P-1012 P-1013
600kW 480V,3Ø,4W
GENERATOR NO. 2
P-1015 P-1016 P-1017 P-1018
600kW 480V,3Ø,4W
GENERATOR NO. 3
P-1020 P-1021 P-1022 P-1023
SWBD-DIST
ELEVATIONS
PMTX-WWTP
1500kVA 13.2kV-480/277V
3P/4W
LIQUID FILLED
PAD MOUNT
HES
UTILITY
METER
C-1001
SECTION 2 SECTION 3 SECTION 4
100%
AF
AT
AF
AT
AF
AT
AF AT
K
AF
AT
KSWBD-GEN
480V, 3000A, 3PH, 4W, 100kA
2000AF
2000AP
2000AT
LSIG
ARMS
E.O.
N.O.
100%
2B AUTOMATIC
TRANSFER
CONTROL
2000:5 (3)
POWER
MONITOR
SPD
250kA
2000AF
2000AP
2000AT
LSIG
ARMS
E.O.
N.C.
100%
4B
2000:5 (3)
POWER
MONITOR
SPD
250kA
3A
4A2A
2C 4C
100% 3B
SWBD-DIST-A
480V, 2000A, 3PH, 4W, 100kA
SWBD-DIST-B
480V, 2000A, 3PH, 4W, 100kA
UV BANK B MCC-5MTS-MCC-1 UV BANK DMCC-2MCC-4UV BANK CMCC-3UV BANK AMTS-MCC-1
SPARE
SWBD-DIST
SINGLE LINE DIAGRAM
1H1G1F1E1D1C1B1A 5A 5B 5C 5D 5E 5F 5G 5H
SPARESPARE SPARE SPARESPARE
120:480
(3)
480:120
(3)
P-1025 P-1026 P-1027 P-1028
P-1029 P-1030 P-1031 P-1032
P-1001 P-1002 P-1003 P-1004
P-1005 P-1006 P-1007 P-1008
PORTABLE
GENERATOR
CONNECTION
1A
2A 3A 4A
1E
1B 1F
1C 1G
1D 1H
5A 5E
5B 5F
5C 5G
5D 5H
2B 3B
2C
4B
4C
SECTION 5
SWBD-GEN
ELEVATIONS
SECTION 1
36" 30" 30" 30" 36"
54"
1A
1A 1B 2A
2B
3A
3B
SECTION 1 SECTION 2 SECTION 4
36"
48"
36" 36"
SWBD-DIST
S.E. RATED
ETU
400AF
300AP
300AT
LSIG
ETU
400AF
300AP
300AT
LSIG
ETU
400AF
300AP
300AT
LSIG
ETU
1200AF
1200AP
1200AT
LSIG
ARMS
ETU
400AF
400AP
400AT
LSIG
ETU
1200AF
1200AP
1200AT
LSIG
ARMS
ETU
400AF
300AP
300AT
LSIG
ETU
400AF
400AP
400AT
LSIG
ETU
400AF
300AP
300AT
LSIG
ETU
1200AF
1200AP
1200AT
LSIG
ARMS
ETU
400AF
300AP
300AT
LSIG
ETU
400AF
400AP
400AT
LSIG
ETU
400AF
400AP
400AT
LSIG
ETU
1200AF
1200AP
1200AT
LSIG
ARMS
ETU
400AF
300AP
300AT
LSIG
ETU
400AF
300AP
300AT
LSIG
1 06/2026 ADDENDUM NO. 1 JC
2000:5 (3)
SECTION 3
1B
2A
2B
PHASE MONITOR
SPD
250kA
AF
AT
4A 4B
3A
3B
4A
4B
36"
1200AF
1000AP
1000AT
LSIG
ARMS
E.O.
N.O.
100% 1200AF
1000AP
1000AT
LSIG
ARMS
E.O.
N.O.
100% 1200AF
1000AP
1000AT
LSIG
ARMS
E.O.
N.O.
SWBD-GEN-M
SWBD-GEN-P
ALTERNATE
SOURCE
BREAKER
UTILITY
SOURCE
BREAKER
ET
U
2000AF
2000AP
2000AT
LSIG
ARMS
N.C.
1 1
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