HomeMy WebLinkAboutExhibit E - Equipment Specifications . . . I�i�i--� �
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WALZ CSG
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Prepared for:
Innovative Power Systems
2670 Patton Rd,
Roseville, MN 55113
Location: St Joseph, MN
Date: March 15, 2017
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EVS Project No.: 2017-024.1
WALZ 972KW PROJECT: EQUIPMENT SPECS& CALCULATIONS
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TABLE OF CONTENTS
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1. SYSTEM DESCRIPTION............................................................... ....ar.�., ..�........��,..:Z
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2. STEP—UP TRANSFORMER SPECS...............................................�� .............�,�................3
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3. SWITCHBOARD SPECS.....................................................�.......................................4
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4. ZIG—ZAG GROUNDING TRANSFORMER SPECS......................::.......................................5
5. ZIG—ZAG GROUNDING TRANSFORMER CALCULATIONS ................................................6
6. ONE—LINE DIAGRAM ..............:.,...................:...............................................................7
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3/15/2017 Page 1
WAIZ 972KW PROJECT: EQUIPMENT SPECS& CALCULATIONS ���
3- LOW VOLTAGE SWITCHGEAR SPECS:
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Item Description '
General Low Voltage switchboard
Standards UL Standard 891,NEMA PB-2(Switchboard Standards)
Voltage 480V 3P,4W
BIL 30 kV
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Frequency 60 Hz � �
Main Bus 1600A Copper =-
Design Outdoor, NEMA 3R, Non-walk-in,Service Entrance Rated
Fault Rating 65 kA
Main CB 1600A,42kA,Draw-out, insulated case, LSIG Trip to be visible, lockable,readily
accessible. Provide arc flash maintenance switch
Utility Production Metering Section per Xcel Energy TR-40 requirements(Xcel will supply the
Metering Section metering sockets and everything.We just need a section per TR-40 requirements)
Isolation Switch 1600A with lockout provision, UL 98,65 kA minimum i
(unfused)
480V Feeder molded case w/electronic trip,35 kA, LOTO provisions.
Circuit Breakers 3x400 Amps& 1x350 Amps, per drawing.
Aux Transformer 10 kVA,single-phase,480 L-L-120/240V. Primary fused(25A)
Aux Power Panel 120/240V,40A, MCB, 10 kA, Feeders as shown on schedule.
Heaters Provide(1)condensate heater per section-250W, 120V-powered by aux panel.
Provide adjustable thermostat.
Color ANSI#70 light gray
Misc. Provide top lifting provisions.
Provide(2) 120V,20A,GFI outlets.
Provide exterior padlock provisions.
Provide nameplates per equipment section
� Circuit CB Size(A) #Poles
Main 40 2
�� One Heater/section 20 1
DAS System 20 1
GFI Outlet#1 20 1
GFI Outlet#2 20 1
�:�, Spare 20 1
���`� ` Spare 20 1
Spare 20 1
Spare 20 1
3/15/2017 Page 4
WALZ 972KW PROJECT: EQUIPMENT SPECS&CALCULATIONS �/��+�+
4- GROUNDING TRANSFORMER SPECS:
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Item Description
General Low Voltage, Dry-Type,Zig-Zag,Grounding Transformer
Standards ANSI C57, UL
Voltage 480V,3P �u��
BIL 30 KV
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Frequency 60 Hz "
Windings Aluminum
Enclosure 3R powder coat painted enclosure
Zero Sequence Reactance(XO)-per phase 0.1422 ohm+/-10%(On a 0.972 MVA,480V base)
XO/RO Ratio Must be>_4
Zero Sequence Current(10) Must exceed 78.34 A,per phase
Neutral Current(In) Must exceed 235 A continuous
5 second Withstand Rating 2770.1 A
Relay SEL-751 In Cabinet Relay
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NOTE: Don't proceed with the procurement of the Zi�-zag grounding transformer before having the calculations
document approved by XceL
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