secondary unit substations

Siemens Industry, Inc. SPEEDFAX™ 2011 Product Catalog14-40

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For more information, please visit http://automation.usa.siemens.com/consultant/ or contact your local sales office.

Siemens / Speedfax Previous folio: 13-49

Secondary Unit SubstationsOverview GeneralSiemens offers a wide variety of unit substation designs to meet customer requirements. A unit substation consists of one or more transformers mechanically and electrically connected to and coordinated in design with one or more switchgear or switchboard assemblies. A secondary unit substation is defined as a unit substation whose outgoing section is rated below 1000 volts.

A typical secondary unit substation consists of three sections:n Primary: an incoming section that

accepts incoming high voltage (2400 to 13,800 volts) line

n Transformer: section that transforms incoming voltage down to utilization voltage (600 volts or less)

n Secondary: an outgoing section that distributes power to outgoing feeders and provides protection for these feeders (600 volts and less)

Standard secondary unit substations consist of:n Medium Voltage Primaryn Transformern Low Voltage Secondary

Siemens also offers low voltage unit substations with:n Low Voltage Primaryn Transformern Low Voltage Secondary

The primary reason for using a secondary unit substation is to bring power as close as possible to the center of the loads. Another reason is that it provides a system design concept incorporating a wide variety of components that permits tailoring equipment to the needs of the application. A secondary unit substation providesn Reduced power lossesn Better voltage regulationn Improved service continuityn Increased functional flexibilityn Lower installation costn Efficient space utilization

Every component and assembly of secondary unit substations are designed and engineered as an integral part of a complete system.

PrimarySwitch

PrimarySwitch

PrimarySwitch

LiquidFilledTransformer

LiquidFilledTransformer

SwitchboardwithWLEncasedSystemsBreakers

TypeSB3SwitchboardwithFusibleSwitches

TypeWLLowVoltageSwitchgear

DryTypeTransformer

Siemens Industry, Inc. SPEEDFAX™ 2011 Product Catalog 14-41

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Siemens Unit Substation Solutions5–27.6 kV Type SIMOSEC Metal-Enclosed Load Interrupter Primary Switch

Dimensions

Cable switch CS Fused switch FS Duplex switch

WidthSinglecableorfuseThreecablesordouble-barrelfuseTwocables+SAor3-barrelfuse

14.8”(375mm)19.7”(500mm)29.6”(750mm)

14.8”(375mm)19.7”(500mm)29.6”(750mm)

19.7”(500mm)+19.7”(500mm)29.6”(750mm)+19.7”(500mm)

Depth 48.4”(1,230mm)

Height 88.6-100.4”(2,250-2,850mm)dependingonarrangement

Technical DataRatedvoltage 5kV 8.25kVand15kV 27.6kV

Ratedfrequency 50/60Hz 50/60Hz 50/60Hz

Ratedshort-durationpower-frequencywithstandvoltage 19kV 36kV 60kV

Ratedlightning-impulsewithstandvoltage(BIL) 60kV 95kV 125kV

Ratedshort-timewithstandcurrent,twoseconds Upto25kA Upto25kA Upto20kA

Fusedshort-circuitcurrentrating(FSpanelsonly)SinglefuseFS-1DoublefuseFS-2TriplefuseFS-3

63kA(to450E)63kA(totwo350E)63kA(tothree200E)

63kA(to200E)63kA(totwo200E)63kA(tothree200E)

20kA20kA20kA

Maximumfusedcontinuouscurrent(notequaltofuseErating)

SinglefuseFS-1 325A 165A 65A

DoublefuseFS-2 575A 305A 117A

TriplefuseFS-3 600A 430A 156A

SwitchdisconnectorContinuous 600A 600A 600A

Interrupting 600A 600A 600A

Mainbuscontinuouscurrentrating 1,200A 1,200A 1,200A

n Standard capacitive voltage indicators to show whether the cable side is energized or not

n Integrated mechanical interlockingn Animated mimic diagram (mimic bus)n Main bus at top or bottom to suit

applicationn Configurations: individual feeder switches,

transformer primary switches and switch line-ups

n Ideal for utility, construction and industrial applications

n Over 20 years of field experience with more than 350,000 switch-disconnector units installed

n Switch-disconnector contacts maintenance free and sealed for life.

n Main bus continuous current rating” (row title) (blank 2nd column from left) and “1,200 A” in each of three columns on right

SIMOSEC Specificationsn Extremely compact footprintn Meets ANSI/IEEE C37.20.3n UL or C-UL listing availablen Seismic compliant up to IBC 2003n High switching capacity - 100 operations

at 600A - five times higher than ANSI requirements

n Gas-insulated, three-position switch\disconnector, hermetically sealed for life inside a stainless steel vessel

n Switch-disconnector combines the functions of a load-interrupter switch(with CLOSED-OPEN indication) and an optional grounding switch (with OPEN-GROUND indication)

n Front accessible fuses and outgoing cables, which means type SIMOSEC switches can be placed against the wall and maximize the use of available space

n Convenient viewing window for visible verification of primary contact position (visible break)

Siemens / Speedfax Previous folio: New page from TRSA-SIMOSC-0810 SS 2/08/11


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High-voltage (HV) Fuse Selection Table

Allowable continuous current (A)

Maximum voltage (kV) Fuse typeE -rating (open air) FS-1 FS-2 FS-3

5.5 55GDMSJ10ES 10E 10

5.5 55GDMSJ15E 15E 15

5.5 55GDMSJ20ES 20E 20

5.5 55GDMSJ25ES 25E 25

5.5 55GDMSJ30ES 30E 30

5.5 55GDMSJ40ES 40E 40

5.5 55GDMSJ50ES 50E 50

5.5 55GDMSJ65ES 65E 65

5.5 55GDMSJ80ES 80E 80

5.5 55GDMSJ100ES 100E 100

5.5 55GDMSJ125ES 125E 120

5.5 55GFMSJ150ES 150E 150

5.5 55GFMSJ175ES 175E 164

5.5 55GFMSJ200ES 200E 183 327

5.5 55GFMSJ250ES 250E 220 390

5.5 55GFMSJ300ES 300E 241 429 598

5.5 55GFMSJ350ES 350E 269 478 600

5.5 55GFMSJ400ES 400E 302 536 600

5.5 55GFMSJ450ES 450E 325 575 600

17.5 175GDMSJ10ES 10E 10

17.5 175GDMSJ15ES 15E 15

17.5 175GDMSJ20ES 20E 20

17.5 175GDMSJ25ES 25E 25

17.5 175GDMSJ30ES 30E 30

17.5 175GFMSJ40ES 40E 40

17.5 175GFMSJ50ES 50E 50

17.5 175GFMSJ65ES 65E 59

17.5 175GXMSJ80ES 80E 73

17.5 175GXMSJ100ES 100E 85

17.5 175GXQSJ125ES 125E 112 207

17.5 175GXQSJ150ES 150E 123 238 336

15.5 155GXQSJ175ES 175E 167 310 420

15.5 155GXQSJ200ES 200E 165 305 430

Siemens Unit Substation SolutionsHigh-voltage (HV) Fuse Selection Table General


Example:n 5,000 kVA, 12.47 kV transformern Full-load current 231.5 An Multiplier 1.33n Current for fuse-size selection =

1.33 x 231.5 A - 308 An Multiplier of 1.33 for transformer with fan-cooled rating

125% of self-cooled rating (adjust multiplier for differing fan-cooled transformer capability)

n Fuse rating = 2 x 175E/phase (FS-2).

FS-1:Onefusebarrelperphase FS-2:Twofusebarrelsperphase FS-3:Threefusebarrelsperphase


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Siemens offers a wide variety of unit substation designs to meet virtually any customer requirement. A unit substation consists of one or more transformers mechanically and electrically connected to, and coordinated with, one or more switchgear or switchboard assemblies. A secondary unit substation is defined as a unit substation whose outgoing section is rated below 1,000 volts.

A typical secondary unit substation consists of three sections:n Primary: depending on the specific

application, this section accepts medium voltage (2,400 to 27,600 volts) incoming power

n Transformer: reduces incoming voltage to utilization voltage (600 volts or less)

n Secondary: distributes power to, and provides protection for, outgoing feeders (600 volts and less).

The key benefit of a secondary unit substation is that it economically brings power as close as possible to the loads, minimizing power loss and maximizing voltage regulation. It also enhances flexibility, using a system design concept that integrates a wide variety of components to tailor the equipment to the specific needs of each application.

Every component or assembly utilized in secondary unit substations is engineered to be an integral part of a complete system.

A secondary unit substation helps you:n Reduce power lossesn Enhance voltage regulationn Improve service continuityn Increase functional flexibilityn Lower installation costsn Minimize space utilization.

SIMOSEC Primary Switch Dry-Type Transformer Type SB3 Switchboard

SIMOSEC Primary Switch Liquid Filled Type Transformer Type SB3 Switchboard

Siemens Unit Substation SolutionsOverview



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Siemens Unit Substation SolutionsTransformers: Dry Type — VPI/VPE

N.P.

Plan view

W

Fancontrol

when req.

18 in.(457 mm)

Std.

LVair

terminalchamber(optional)

HVair

terminalchamber(optional)

Front viewindoor

18 in.(457 mm)

Std.

D

H

Danger

Front

Fancontrolpanel

Groundbus

W

Front viewoutdoor

HV-terminal

4 in. 4 in.


Type = VPI/VPE

Primary Volts = 2400-13800

Sec_Volts = 208-600

Temperature Rise = 150C for Aluminum Windings, 80/115C for Copper Windings

Standard kV BIL (HV/LV) = 60/30 for Aluminum Windings, 95/30 for Copper Windings

Table 1 Low Voltage Switchgear or Switchboard Coordination

Winding Material KVAHeight(Inches)

Width(Inches)

Depth(Inches)

Weight(Pounds)

Aluminum 300 90 90 54 4600Aluminum 500 90 90 54 4800Aluminum 750 90 90 54 5800Aluminum 1000 90 102 60 7000Aluminum 1500 96 102 60 9200Aluminum 2000 102 102 60 11000Aluminum 2500 108 112 60 12200Aluminum 3000 108 118 60 14100Aluminum 3750 112 126 66 15800Aluminum 5000 118 132 66 17000Copper 300 90 90 54 6000Copper 500 90 96 60 6400Copper 750 90 102 60 8000Copper 1000 96 102 60 9700Copper 1500 102 108 60 13200Copper 2000 108 112 60 17400Copper 2500 118 126 60 19000Copper 3000 118 132 60 22000Copper 3750 126 132 66 27000Copper 5000 132 138 66 30000


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Siemens Unit Substation SolutionsTransformers: Dry Type — Cast Coil


Type = Cast Coil

Primary Volts = 2400-13800

Sec_Volts = 208-600

Temperature Rise = 80/115C for Both Aluminum & Copper Windings

Standard kV BIL (HV/LV) = 60/30 for Aluminum Windings, 95/30 for Copper Windings

Table 2 Low Voltage Switchgear or Switchboard Coordination

Winding Material KVAHeight(Inches)

Width(Inches)

Depth(Inches)

Weight(Pounds)

Aluminum 300 90 90 54 5500Aluminum 500 90 90 54 6300Aluminum 750 90 96 60 7800Aluminum 1000 96 102 60 9500Aluminum 1500 102 108 60 11500Aluminum 2000 108 112 60 13800Aluminum 2500 112 126 60 16200Aluminum 3000 118 132 60 19200Aluminum 3750 126 138 66 25000Aluminum 5000 132 144 66 28000Copper 300 90 90 60 6200Copper 500 90 96 60 7000Copper 750 90 102 60 9100Copper 1000 96 112 60 10600Copper 1500 102 118 60 14300Copper 2000 108 118 66 18200Copper 2500 118 126 66 19500Copper 3000 126 132 66 23500Copper 3750 126 144 66 28000Copper 5000 132 160 66 35000


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Siemens Unit Substation SolutionsTransformers: Liquid Filled Type

X3X2X1X0

H3

H2

H1

D

C

J

H

G

B

A

8

E F

Top view Elevation

Weights,gallonsoffluidanddimensionsareforreferenceonly,andnotforconstruction.PleasecontactSiemensIndustryInc.forexactdimensions


Aluminum Windings Copper Windings

Drawing Dimensions (in.) Gallons Of Fluid

Approx. Total Weight (lbs.) (With Fluid)

Gallons Of Fluid

Approx. Total Weight (lbs.) (With Fluid)kVA A B C D E F G H J

500 66 51 26 52 45 45 30 60 35 300 5600 310 5900750 75 59 26 52 55 55 34 68 35 360 7000 370 7400

1000 75 67 26 52 55 55 38 76 35 420 8400 430 88001500 75 59 59 80 55 55 34 68 35 400 9500 420 100002000 85 67 67 90 55 55 38 76 39 520 12000 500 128002500 85 75 68 92 55 55 42 84 41 570 14600 590 149003750 85 75 70 120 65 65 42 84 45 790 20500 830 215005000 99 87 72 144 65 65 48 96 49 1050 26000 1090 280007500 99 95 74 148 75 75 52 104 53 1320 35000 1360 37000

10,000 99 103 76 152 75 75 56 112 57 1740 43000 1780 4500012,000 99 103 82 164 75 75 56 112 61 1850 49000 1880 50000

Unit Type Substation Transformer Primary Volts = 25kV and below, Secondary Voltage = 5kV and below

Table 3 Liquid-Filled 55/65 °C Rise


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Siemens Unit Substation SolutionsType WL Low Voltage Switchgear Substation Secondaries

Siemens type WL low-voltage, metal-enclosed switchgear is designed, constructed and tested to provide superior power distribution, power monitoring and control. At the heart of the type WL low voltage switchgear is the world class Siemens type WL breaker. Siemens type WL low-voltage switchgear can be utilized in the following applications:n Industrial n Institutionaln Critical powern Utility and co-generationn Commercial.

Product Scopen Equipment ratings:

635 Vac maximum

Three-phase, three-wire

Three-phase, four-wire

50/60 Hz

6,000 A maximum horizontal bus

5,000 A maximum vertical bus.n Enclosure options:

NEMA 1 indoor

NEMA 3R outdoor walk-in

NEMA 3R outdoor non walk-in.

Exclusive featuresGenerator/utility protection sets24/7/365 power availability is critical for some systems. On-site generation capabilities are becoming more and more common. Type WL digital electronic trip units allow the system designer to precisely tailor trip settings for the most demanding requirements.

The Siemens type WL 776 trip unit allows one set of trip settings for a fully loaded utility feed and, with a simple contact closure, the trip unit toggles to a second trip set tailored to provide optimal generator protection. The wide range of settings allows the type WL to provide protection for a minimal generator capacity for only essential loads, through full backup for an entire facility. This dual utility/generator protection capability in a single circuit breaker allows the system designer unparalleled, cost effective flexibility.

Extended instantaneous protection (EIP)This patent pending type WL trip unit feature allows the system designer to achieve full selective trip coordination up to the short-time rating of the frame, while also allowing application of the circuit breaker up to the interrupting rating of the frame. EIP allows the type WL breaker to be applied up to the full withstand rating of the circuit breaker, for complete coordination, with a minus 0% short-time band tolerance up to 85 kA on Frame Size II and 100 kA on Frame Size III.

Above fault currents of 20-percent higher than the full short-time rating, the type WL circuit breaker is self-protecting, and the EIP function will trip the circuit breaker instantly to protect the frame and the system from these extremely high currents (as high as 150 kA on Frame Size III). An added benefit is that arc flash energy is greatly reduced in this high- current region due to EIP’s instantaneous trip response.

Industry standardsType WL switchgear with power circuit breakers are designed, tested and constructed in accordance with: n UL 1558—Metal-Enclosed Low-

Voltage Power Circuit Breaker Switchgear

n ANSI C37.20.1—Metal-Enclosed Low- Voltage Power Circuit Breaker Switchgear.

Type WL drawout circuit breakers are designed for continuous operation at 100-percent of their current rating without the need for external heat sinks, and are in accordance with:n UL 1066—Low-Voltage AC and DC

Power Circuit Breakers Used in Enclosures

n ANSI C37.13—Low-Voltage AC Power Circuit Breakers Used in Enclosures.

Switchgear SecondaryNote: See Pages 14-52 to 14-61 for complete details concerning WL Low Voltage Switchgear unit substation secondaries.


For more information, visit our web site at: www.usa.siemens.com/switchgear.


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Siemens Unit Substation SolutionsSwitchboard Substation Secondaries


Product OverviewSiemens modular front connected switchboard design provides a broad range of features and capabilities for a wide range of applications.

Every aspect of design of Siemens switchboards has been aimed at improving layout convenience, reducing installation costs and minimizing the impact and cost of changes to the system.

Siemens switchboards provide a rugged design and the flexibility necessary in electrical systems for all types of applications, some examples are:

n Industrial plantsn High-rise complexesn Hospitalsn Commercial buildings

Standards and CertificationsSiemens switchboards are designed, tested and constructed in accordance with:

n UL891 – Switchboardsn NEMA PB-2n Seismially qualifiedn Other equipment is UL listed as

applicable

Features & BenefitsSiemens switchboards ratings and features include:

n Up to 6000 ampere main bus ratingn Up to 600 volts ACn Bus bracing up to 200KAICn Copper or aluminum bussingn Temperature or density rated bussingn Type 1 and Type 3R enclosuresn Main and branch circuit breakers and

fusible switchesn Thermal magnetic and solid state

circuit breakersn Surge protective devicesn Utility metering provisions

n ACCESS power monitoring on mains and branches

n Ground fault protection on mains and branches

n Busway and transformer connectionsn Protective relayingn Two and three device autothrowover

scheme

Further Switchboard InformationSee Section 13 for complete details concerning SB3 front-connected switchboard unit substation secondaries.


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Transformer

38.0 38.0

AreaRestricted

conduitTop and bottom

48.4

19.7 W

�

D 58.0�

Section #1 Section #2

Unit space

38" (965 mm)

Type SB3 switchboard digital meter type SPD module

90" (2,286 mm)

38" (965 mm)

19.7" (500 mm)

100.4" (2,550 mm)

PrimaryluglocationSeepage5fortransformerdimensions.

PrimarySwitchrequiresfrontaccessfortopcableentryterminations.Transformerrequiresaccessfromthefrontand12”(305mm)onthebacksideforventilationspace.

Plan view

Front view

Siemens Unit Substation SolutionsIndoor Dry Type Transformer Sketch Page



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Plan view

Front view

Siemens Unit Substation SolutionsIndoor Liquid Filled Transformer Sketch Page

Section #2 Section #3 Section #1

Primary Switch requires front access for top cable entry terminations. Transformer requires access from the front and 12" (305 mm) on the back side for ventilation space.

Liquid filledtransformer 100.4”

(2,550 mm)

Main breaker

Metering/SPD

X3

X2

X1

X0H1

H2

H3

19.7”(500 mm)

48.4”(1,229 mm)

spac

e in

top

or

bott

om

for

cust

omer

's c

able

s.

Max

imu

m a

vaila

ble

Space for secondary leads from above.

31.5” (800 mm)


for

cust

omer

's c

able

s.sp

ace

in t

op o

r bo

ttom

M

axim

um

ava

ilabl

e


Space for secondary leads from below.

spac

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top

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bott

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for

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's c

able

s.

Max

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vaila

ble



�

32.0”(813 mm)

22.0”(559 mm)

22.0”(559 mm)

D

Transformer

W

� 70.0”(1,778 mm)

102.2”(2,596 mm)

31.5” (800 mm)

31.5” (800 mm)

32.0”(813 mm)

22.0”(559 mm)

22.0”(559 mm)

Primaryluglocations.Seepage6fortransformerdimensions.

PrimarySwitchrequiresfrontaccessfortopcableentryterminations.Transformerrequiresaccessfromthefrontand12”(305mm)onthebacksideforventilationspace.



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Section #1

103.1”(2,619 mm)

Outdoor type

SIMOSEC switch

30.2”(767 mm)

76.8”(1,951 mm)

W

Walk-in aisle Door

113.9”(2,893 mm)

Door

Section #2 Section #3

X0

X1

X2

X3H1

H2

H3H3

H2

H1

42.7”(1,085 mm)

59.9”(1,521 mm)

Allow 6” clearancefor door swing

124.0”(3,150 mm)

Low voltage switchgear

�

D

Liquid filledtransformer

�

Primaryluglocations.Seepage6fortransformerdimensions.

Plan view

Front view

Siemens Unit Substation SolutionsOutdoor Liquid Type Transformer Sketch Page


secondary unit substations

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