Buck-Boost - American Rotary transformers are conventional low voltage, single phase distribution transformers, with standard primary voltages of 120, 240 or 480 volts, and secondary

Buck-Boost » Transformers

AmericAn rotAry N59W16600 Greenway Circle, Menomonee Falls, WI 53051

©2014 American Rotary. All Rights Reserved

AmericanRotary.com 888.743.6832

Buck-Boost Transformers - Questions & Answers

1. What is a buck-boost transformer?

Buck-boost transformers are small single phase transformers designed to lower (buck) or raise (boost) line voltage from 5-20%. The most common applications for buck-boost transformers include boosting 208 volts to 230 or 240 volts for air conditioning systems, boosting 110 to 120 volts and 240 to 277 volts for lighting applications, heating systems and induction motors of all types. Many applications exist where supply voltages are frequently above or below nominal.

Buck-boost transformers are conventional low voltage, single phase distribution transformers, with standard primary voltages of 120, 240 or 480 volts, and secondary voltages of 12, 16, 24, 32 or 48 volts. They are available in sizes ranging from 50 VA to 10,000 VA. The primary and secondary are wired together to form a single-winding autotransformer. Utilizing the additive and subtractive polarity, small amounts of voltage are either added or subtracted from a distribution circuit.

2. How does a buck-boost transformer differ from an isolating transformer?

A buck-boost transformer is manufactured as an isolating transformer, with separable primary and secondary, and is shipped from the factory in that configuration. When the end user at site connects it, the primary is connected to the secondary changing the transformer’s electrical characteristics to those of an autotransformer. This provides the smaller voltage correction that is typical of buck-boost. The primary and secondary windings are no longer isolated as they are connected together.

3. What is the difference between a buck-boost transformer and an autotransformer?

As noted above, when the primary and secondary are connected together to buck or boost voltage, the transformer becomes an autotransformer. If the connection between the primary and secondary winding is not made, then the unit remains as an isolation transformer.

Applications

4. Why are they used?A buck-boost transformer is a simple and effective way of correcting off-standard voltages. Electrical and electronic equipment is designed to operate within a standard tolerance of nominal supply voltages. When the supply voltage is consistently too high or low - typically more than 10%, the equipment will operate below peak efficiency.

5. Can buck-boost transformers be used to power low voltage circuits?

Installed as two-winding, isolation transformers, these units can be used to power low voltage circuits including control, lighting circuits, or other low voltage applications that require 12, 16, 24, 32 or 48 volts output, consistent with the secondary of these designs. The unit is connected as an isolating transformer and the nameplate kVA rating is the transformer’s capacity.





Single Phase Connection Diagrams


SECTION 2

93

SE

CTIO

N 2

BUCK-BOOST TRANSFORMERS

LowVoltage

HighVoltage

H4H2

H3

H1

X1

X3

X2

X4

LowVoltage

HighVoltage

H4H2

H3

H1

X1

X3

X2

X4

LowVoltage

HighVoltage

H4H2

H3

H1

X1

X3

X2

X4

LowVoltage

HighVoltage

H4H2

H3

H1

X1

X3

X2

X4

© Hammond Power Solutions Inc. Data subject to change without notice.

Single Phase Connection Diagrams

ConnectionDiagram #2







NEMA 3R Enclosure Dimensional Drawings


262

GENERAL INFORMATIONG

ENER

AL

INFO

RM

ATIO

N

CaseStyle Fig #

Dimensions in InchesA B C D E F G H J K1 L M N P R

NQ0 1 3.75 5.25 7.25 2.50 5.63 6.25 1.50 2.00 -- 0.88 -- -- 0.22 1.25 --NQ1 1 4.50 5.75 7.25 3.13 5.63 6.25 1.50 2.00 0.81 0.88 -- -- 0.22 1.25 --NQ2 1 5.00 4.75 9.25 3.88 7.75 8.25 1.50 2.00 1.00 0.88 X 1.13 X 1.38 -- -- 0.22 1.25 --NQ3 1 5.88 5.50 10.50 4.13 8.25 9.00 1.50 2.00 1.25 0.88 X 1.13 X 1.38 -- -- 0.28 1.25 --NQ4 1 7.00 6.50 11.75 5.38 9.50 10.25 1.75 2.00 1.50 0.88 X 1.13 X 1.38 -- -- 0.28 1.25 --NQ5 2 10.00 7.75 17.25 7.38 15.38 15.25 2.375 2.00 4.00 1.13 X 1.38 6.00 0.75 0.44 1.25 1.68

NQ6A 2 12.25 9.25 17.63 9.38 14.88 15.56 2.00 2.00 5.00 1.38 X 2.50 8.00 0.75 0.44 2.00 1.68NQ6 2 12.25 9.25 20.88 9.38 18.13 18.88 2.00 2.00 5.00 1.38 X 2.50 8.00 0.75 0.44 2.00 1.68NQ7 2 14.50 10.75 21.38 11.63 18.63 19.38 2.00 2.00 6.00 1.38 X 2.50 10.00 0.75 0.44 2.00 1.81NQ8 2 14.50 10.75 27.38 11.13 24.50 24.88 2.00 2.00 6.00 1.38 X 2.50 10.00 0.75 0.56 2.00 1.81


‘NQ’ SERIES ENCLOSURESNEMA 3R ENCLOSURE DIMENSIONAL DRAWINGS

OptiOnal StainlESS StEEl EnclOSurES arE availablE.1 Knockout (K) sizes are actual diameters of knockout, not conduit sizes. Refer to table on page 260 for conduit sizes.

A

C

G

F

BØM

H

.34

LØN

ØN D

J

E

K (K.O.)

K (K.O.)

P

R

FRONT VIEW SIDE VIEW BACK VIEW

BA

CK

Figure 2

A

C

B

F

G

K (K.O.)

.39

H

D

E

J

ØN

ØNK (K.O.)

P

A/2


BA

CK

Figure 1

‘NQ’ Series Enclosures




Single Phase Specification Tables


90

SECTION 2S

EC

TIO

N 2

HPS Universal™



PrimaryVoltageSecondaryVoltage

120 X 240

12 X 24

Group A

50/60 Hertz


120 X 240

16 X 32

Group B

50/60 Hertz

VA CatalogNumber

CaseStyle

(Pages 262)

Approx. Dimensions(Inches) Approx.

Weight(Lbs.)

Mtg TypeW - WallWidth Depth Height

50 QC05ERCB NQ0 3.75 5.25 7.25 6 W100 QC10ERCB NQ0 3.75 5.25 7.25 7 W150 QC15ERCB NQ0 3.75 5.25 7.25 8 W200 QC20ERCB NQ1 4.50 5.75 7.25 11 W250 QC25ERCB NQ1 4.50 5.75 7.25 13 W350 QC35ERCB NQ1 4.50 5.75 7.25 14 W500 QC50ERCB NQ2 5.00 4.75 9.25 15 W750 QC75ERCB NQ2 5.00 4.75 9.25 18 W1000 Q1C0ERCB NQ3 5.88 5.50 10.50 25 W1500 Q1C5ERCF NQ4 7.00 6.50 11.75 36 W2000 Q002ERCF NQ4 7.00 6.50 11.75 46 W3000 Q003ERCF NQ5 10.00 7.75 17.25 65 W5000 Q005ERCF NQ5 10.00 7.75 17.25 105 W

VA CatalogNumber

CaseStyle

(Pages 262)


Weight(Lbs.)


50 QC05ESCB NQ0 3.75 5.25 7.25 6 W100 QC10ESCB NQ0 3.75 5.25 7.25 7 W150 QC15ESCB NQ0 3.75 5.25 7.25 8 W200 QC20ESCB NQ1 4.50 5.75 7.25 11 W250 QC25ESCB NQ1 4.50 5.75 7.25 13 W350 QC35ESCB NQ1 4.50 5.75 7.25 14 W500 QC50ESCB NQ2 5.00 4.75 9.25 15 W750 QC75ESCB NQ2 5.00 4.75 9.25 18 W1000 Q1C0ESCB NQ3 5.88 5.50 10.50 25 W1500 Q1C5ESCF NQ4 7.00 6.50 11.75 36 W2000 Q002ESCF NQ4 7.00 6.50 11.75 46 W3000 Q003ESCF NQ5 10.00 7.75 17.25 65 W5000 Q005ESCF NQ5 10.00 7.75 17.25 105 W






SECTION 2

91

SE

CTIO

N 2

BUCK-BOOST TRANSFORMERS




240 X 480

24 X 48

Group C

50/60 Hertz

Three Phase Specification Tables


120 X 240

12 X 24

Group A

50/60 Hertz

VA CatalogNumber

CaseStyle

(Pages 262)


Weight(Lbs.)


50 QC05DTCB NQ0 3.75 5.25 7.25 6 W100 QC10DTCB NQ0 3.75 5.25 7.25 7 W150 QC15DTCB NQ0 3.75 5.25 7.25 8 W200 QC20DTCB NQ1 4.50 5.75 7.25 11 W250 QC25DTCB NQ1 4.50 5.75 7.25 13 W350 QC35DTCB NQ1 4.50 5.75 7.25 14 W500 QC50DTCB NQ2 5.00 4.75 9.25 15 W750 QC75DTCB NQ2 5.00 4.75 9.25 18 W1000 Q1C0DTCB NQ3 5.88 5.50 10.50 25 W1500 Q1C5DTCF NQ4 7.00 6.50 11.75 36 W2000 Q002DTCF NQ4 7.00 6.50 11.75 46 W3000 Q003DTCF NQ5 10.00 7.75 17.25 65 W5000 Q005DTCF NQ5 10.00 7.75 17.25 105 W

VA CatalogNumber

CaseStyle

(Pages 262)


Weight(Lbs.)


50 QC05ERCB NQ0 3.75 5.25 7.25 6 W100 QC10ERCB NQ0 3.75 5.25 7.25 7 W150 QC15ERCB NQ0 3.75 5.25 7.25 8 W200 QC20ERCB NQ1 4.50 5.75 7.25 11 W250 QC25ERCB NQ1 4.50 5.75 7.25 13 W350 QC35ERCB NQ1 4.50 5.75 7.25 14 W500 QC50ERCB NQ2 5.00 4.75 9.25 15 W750 QC75ERCB NQ2 5.00 4.75 9.25 18 W1000 Q1C0ERCB NQ3 5.88 5.50 10.50 25 W1500 Q1C5ERCF NQ4 7.00 6.50 11.75 36 W2000 Q002ERCF NQ4 7.00 6.50 11.75 46 W3000 Q003ERCF NQ5 10.00 7.75 17.25 65 W5000 Q005ERCF NQ5 10.00 7.75 17.25 105 W




Why Use Buck-Boost Transformers?


82

SECTION 2S

EC

TIO

N 2

HPS Universal™

BUCK-BOOST STANDARD SPECIFICATIONS


Why Use Buck-Boost Transformers?The advantages of using a buck-boost transformer over an equivalent standard isolation transformer are:

Advantages1) Used in a variety of applications2) Inexpensive3) Smaller and lighter4) More efficient 5) 5-10 times increase in kVA

Disadvantages1) No circuit isolation2) Cannot create a neutral3) KVA and voltages do not match what’s on the nameplate kVA and voltages.

Buck-Boost ApplicationBuck-boost transformers offer an economical solution to the adjustment of line voltages that are slightly

above or below normal. When a buck-boost transformer is connected as an autotransformer, only a portion of the load kVA is actually transformed. The majority of the load kVA is passed directly through to the source. For this reason a buck-boost transformer may be used to supply a much larger kVA load than is indicated on the nameplate.

Buck-boost transformers can be used to adjust stable voltages only.

UL Listed File: E50394 File: E50394

CSA Certified File: LR3902 File: LR3902

Frequency 50/60 Hz 50/60 Hz

Insulation System 130°C (80°C rise) 180°C (115°C rise)

Standard Design Single Phase, welded core construction Single Phase, welded core construction made with high quality, high permeability made with high quality, high permeability silicon steel laminations. Computer silicon steel laminations. Computer designed coils, accurately wound from designed coils, accurately wound from high quality copper magnetic wire. high quality copper magnetic wire.

Encapsulation All units from 50VA to 5kVA are All units from 50VA to 5kVA are encapsulated with electrical grade silica encapsulated with electrical grade silica sand and resin compounds. sand and resin compounds.

Enclosure Type Heavy Duty NEMA Type 3R Heavy Duty NEMA Type 3R (optional NEMA 4, 4X and 12 available) (optional NEMA 4, 4X and 12 available)

Enclosure Finish ANSI 61 Grey, UL50 ANSI 61 Grey, UL50

Termination Front accessible separate high and Front accessible separate high and low voltage lead wires or copper tabs. low voltage lead wires or copper tabs.

Conduit Knock-Outs Side and rear standard on all units. Side and rear standard on all units.

Mounting Standard Wall Mounting. Standard Wall Mounting.

50 to 1000 VA 1500 to 5000 VA

Single & Three Phase

» Transformers




General Purpose

Single & Three Phase » TransformersSEC

TION

7

For termination details see page 275.175

For accessories see pages 271 to 274.

SECTION 7 ENERGY EFFICIENT GENERAL PURPOSE DISTRIBUTION


15 to 37.5 kVA 50 to 167 kVA

EfficiencyExceeds DOE 10 CFR Part 431 and C802.2 efficiencies at 35% of the rated load.Efficiency performance will meet the NEMA Premium® guidelines; 30% lower losses than DOE 10 CFR Part 431 and (if applicable) C802.2 efficiency standards; when measured under a linear load profile.

UL Listed File: E112313 File: E112313

CSA Certified File: LR3902 File: LR3902

Frequency 60 Hz 60 Hz

Insulation System 220°C (150°C rise)(optional 115°C and 80°C rise available)

220°C (150°C rise)(optional 115°C and 80°C rise available)

Enclosure Type Heavy Duty Ventilated Type 3ROptional Type 4, 4X (stainless steel) and 12.

Heavy Duty Ventilated Type 3ROptional Type 4, 4X (stainless steel) and 12.

Enclosure Finish ANSI 61 Grey, UL50 ANSI 61 Grey, UL50

Standard Primary Taps Refer to wiring diagrams for details. Refer to wiring diagrams for details.

TerminationFront accessible separate high and low voltage terminals; connectors suitable for aluminum and copper are provided for easy cable installation.

Front accessible separate high and low voltage terminals; connectors suitable for aluminum and copper are provided for easy cable installation.

Conduit Knock-Outs Standard on all units. Standard on 50 kVA, 75 kVA & 100 kVA units.

Impedance Typically 2.5% to 6.5% Typically 2.5% to 6.5%

Mounting Floor or wall/ceiling mounting available.Refer to selection tables for details.

Floor or wall/ceiling mounting available.Refer to selection tables for details.

Seismic

Meets Occupancy Category III Ip=1.25 for Ss=1.0g per IBC 2006; section 1613, earthquake loads and NBCC 2005 for ground level installations only for all locations in North America.

Meets Occupancy Category III Ip=1.25 for Ss=1.0g per IBC 2006; section 1613, earthquake loads and NBCC 2005 for ground level installations only for all locations in North America.

Sound level Meets NEMA ST-20 standards.(Optional low noise units available)

Meets NEMA ST-20 standards.(Optional low noise units available)

Other voltages and kVA sizes not listed in this section are available upon request for both aluminum and copper wound units. Features as listed above may differ. Please contact customer service for details, price and availability.

15 to 37.5 kVA 50 to 167 kVA

ALUMINUM & COPPER, SINGLE PHASE STANDARD SPECIFICATIONS

600 VOLT CLASS SUPER ENERGY EFFICIENT GENERAL PURPOSE DISTRIBUTION TRANSFORMER

HPS SuperSentinel®




Electrical Schematics and Connection Diagrams

Single & Three Phase » Transformers

276


ENER

AL

INFO

RM

ATIO

N

H1 H3 H2 H4

X4 X2 X3 X1


ELECTRICAL SCHEMATICS AND CONNECTION DIAGRAMS

Primary Volts Connect lines to Inter-connect240 480 416 H1, H4 H2-H3120 240 208 H1, H4 H1-H3, H2-H4

SCHEMATIC CONNECTIONSSCD 1

Secondary Volts Connect lines to Inter-connect24 32 48 240 X1, X4 X2-X3

12/24 16/32 24/48 120/240 X1, X2, X4 X2-X312 16 24 120 X1, X2 X2-X4, X1-X3

X2H2

H1

H3

X1X3

X0

123

45

67

Primary Volts Connect lines to Inter-connect 630 H1, H2, H3 1-H1, 1-H2, 1-H3 615 H1, H2, H3 2-H1, 2-H2, 2-H3 600 H1, H2, H3 3-H1, 3-H2, 3-H3 585 H1, H2, H3 4-H1, 4-H2, 4-H3 570 H1, H2, H3 5-H1, 5-H2, 5-H3 480 H1, H2, H3 6-H1, 6-H2, 6-H3 456 H1, H2, H3 7-H1, 7-H2, 7-H3 432 H1, H2, H3 8-H1, 8-H2, 8-H3


Secondary Volts Connect lines to Inter-connect 208 480 X1, X2, X3 - 120 120 X1, X0 -

X2, X0 -X3, X0 -

HV HVH1 H2 H1 H2

OR

OR

7 8642135 7 8642135

X4 X1X3X2X4 X1X3X2LV LV LV

LV

Primary Volts Connect lines to Inter-connect 504 440 437 218 291 277 440 H1, H2 1-2 492 426 213 284 H1, H2 2-3 480 416 416 208 277 240 416 H1, H2 3-4 468 406 203 270 H1, H2 4-5 456 400 395 198 263 208 400 H1, H2 5-6 444 385 192 256 H1, H2 6-7 432 380 374 187 249 120 380 H1, H2 7-8

220 H1, H2 H1-2, H2-1 240 208 208 H1, H2 H1-4, H2-3 228 200 198 H1, H2 H1-6, H2-5 216 190 187 H1, H2 H1-8, H2-7


Secondary Volts Connect lines to Inter-connect 240 X1, X4 X2- X3 120 X1, X2 X2-X4, X1-X3 120/240 X1, X2, X4 X2-X3






277

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

H1 H2

X4 X3X2 X1

H1 H2

X4 X3X2 X1

3 421

H2

H3

H1 X1

X2

X0

X3

123


Primary Volts Connect lines to Inter-connect208 277 347 380 416 600 2400 3300 4160 4800 6600 7200 H1, H2 ---


Secondary Volts Connect lines to Inter-connect240 24 X1, X4 X2-X3

120/240 12/24 X1, X2, X4 X2-X3120 12 X1, X2 X2-X4, X1-X3


Primary Volts Connect lines to Inter-connect 120 208 240 277 380 416 480 600 H1, H2 1-2 114 198 228 263 361 395 456 570 H1, H2 2-3 108 188 216 249 347 374 432 540 H1, H2 3-4

SCHEMATIC CONNECTIONS

Secondary Volts Connect lines to Inter-connect 240 X1, X4 X2-X3 120/240 X1, X2, X4 X2-X3 120 X1, X2 X2-X4, X1-X3

HV HVH1 H2 H1 H2

OR

OR

6 4 2 1 3 5 6 4 2 1 3 5

X4 X1 X3 X2X4 X1 X3 X2LV LV LV

LV

SCHEMATIC CONNECTIONSPrimary Volts Connect lines to Inter-connect

218 277 291 437 504 630 2520 4368 H1, H2 1-2213 - 284 426 492 615 2460 4264 H1, H2 2-3208 240 277 416 480 600 2400 4160 H1, H2 3-4203 - 270 406 468 585 2340 4056 H1, H2 4-5198 208 263 395 456 570 2280 3952 H1, H2 5-6

Secondary Volts Connect lines to Inter-connect240 X1, X4 X2-X3

120/240 X1, X2, X4 X2-X3120 X1, X2 X2-X4, X1-X3

SCD 6

Primary Volts Connect lines to Inter-connect 208 218 242 252 437 480 483 504 604 630 H1, H2, H3 1 198 208 230 240 416 456 460 480 575 600 H1, H2, H3 2 187 198 219 228 395 432 437 456 546 570 H1, H2, H3 3


Secondary Volts Connect lines to 208 230 240 380 416 460 480 600 X1, X2, X3 120 133 139 220 240 265 277 347 X1, X0 X2, X0 X3, X0

SCD 5






278


ENER

AL

INFO

RM

ATIO

N

H2

H1

H3

X1

X2

X0

X3

12

345

H2

H1 H3

X0X1

X2

X3

64

213

5


Primary Volts Connect lines to Inter-connect 218 242 252 437 483 504 604 630 H1, H2, H3 1 213 236 246 426 472 492 589 615 H1, H2, H3 2 208 230 240 416 460 480 575 600 H1, H2, H3 3 203 224 234 406 449 468 561 585 H1, H2, H3 4 198 219 228 395 437 456 546 570 H1, H2, H3 5

Secondary Volts Connect lines to Inter-connect 208 380 416 480 600 X1, X2, X3 - 120 220 240 277 347 X1, X0 - X2, X0 - X3, X0 -



Secondary Volts Connect lines to Inter-connect 208 380 416 480 600 X1, X2, X3 - 120 220 240 277 347 X1, X0 - X2, X0 - X3, X0 -

Primary Volts Connect lines to Inter-connect

218 242 252 437 483 504 604 630 2520 4368 H1, H2, H3 1-2 213 236 246 426 472 492 589 615 2460 4264 H1, H2, H3 2-3 208 230 240 416 460 480 575 600 2400 4160 H1, H2, H3 3-4 203 224 234 406 449 468 561 585 2340 4056 H1, H2, H3 4-5 198 219 228 395 437 456 546 570 2280 3952 H1, H2, H3 5-6


H2 X2

X0

X3H3H1

X1

42

13

Primary Volts Connect lines to Inter-connect

218 242 252 437 483 504 604 630 2520 4368 H1, H2, H3 1-2 208 230 240 416 460 480 575 600 2400 4160 H1, H2, H3 2-3 198 219 228 395 437 456 546 570 2280 3952 H1, H2, H3 3-4


Secondary Volts Connect lines to 208 230 240 380 416 460 480 600 X1, X2, X3 120 133 139 220 240 265 277 347 X1, X0 X2, X0 X3, X0






279

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

H2 X2

H1 H3 X1 X3

12

3

4

X2H2

H1 H3 X1 X3X6

12

3

4

120 120

X2H2

H1

H3

X1X3

X0

1234

56

78910


Primary Volts Connect lines to Inter-connect 480 600 H1, H2, H3 1-2 456 570 H1, H2, H3 2-3 432 540 H1, H2, H3 3-4


Secondary Volts Connect lines to Inter-connect 240 X1, X2, X3 -

Primary Volts Connect lines to Inter-connect 480 600 H1, H2, H3 1-2 456 570 H1, H2, H3 2-3 432 540 H1, H2, H3 3-4


Secondary Volts Connect lines to Inter-connect 240 X1, X2, X3 - 120 X1, X6 - X3, X6 -


Primary Volts Connect lines to Inter-connect 630 H1, H2, H3 1-H1, 1-H2, 1-H3 615 H1, H2, H3 2-H1, 2-H2, 2-H3 600 H1, H2, H3 3-H1, 3-H2, 3-H3 585 H1, H2, H3 4-H1, 4-H2, 4-H3 570 H1, H2, H3 5-H1, 5-H2, 5-H3 504 H1, H2, H3 6-H1, 6-H2, 6-H3 492 H1, H2, H3 7-H1, 7-H2, 7-H3 480 H1, H2, H3 8-H1, 8-H2, 8-H3 468 H1, H2, H3 9-H1, 9-H2, 9-H3 456 H1, H2, H3 10-H1, 10-H2, 10-H3


Secondary Volts Connect lines to Inter-connect 208 480 X1, X2, X3 - 120 277 X1, X0 -

X2, X0 -X3, X0 -

X7

H1

H2

H3

X8

X9

H4

X4X1

H6X6

X3

H5

X5

X2

Connect to Step Down Step Up

Lines from Supply H1, H2, H3 X1, X2, X3

Lines to Load X1, X2, X3 H1, H2, H3







280


ENER

AL

INFO

RM

ATIO

N

H2

H3H1

X1

X2

X3

123

54

HV HVH1 H3 H2 H4 H1 H3 H2 H4

OR

OR

7 8 6 4 2 1 3 5 7 8 6 4 2 1 3 5


LV

HV HV

H1 H2H3

H4 H2H3

H4H1

OR

OR X4 X1X3X2X4 X1X3X2

LV LV LV

LV


Primary Volts Connect lines to Inter-connect 504 630 H1, H2, H3 1 492 615 H1, H2, H3 2 480 600 H1, H2, H3 3 468 585 H1, H2, H3 4 456 570 H1, H2, H3 5


Secondary Volts Connect lines to Inter-connect 240 X1, X2, X3

Primary Volts Connect lines to Inter-connect 504 H1, H4 1-H2, 2-H3, H2-H3 492 H1, H4 3-H2, 2-H3, H2-H3 480 H1, H4 3-H2, 4-H3, H2-H3 468 H1, H4 5-H2, 4-H3, H2-H3 456 H1, H4 5-H2, 6-H3, H2-H3 444 H1, H4 7-H2, 6-H3, H2-H3 432 H1, H4 7-H2, 8-H3, H2-H3 252 H1, H4 1-H2, 2-H3, H1-H3, H2-H4 240 H1, H4 3-H2, 4-H3, H1-H3, H2-H4 228 H1, H4 5-H2, 6-H3, H1-H3, H2-H4 216 H1, H4 7-H2, 8-H3, H1-H3, H2-H4



Primary Volts Connect lines to Inter-connect 218 252 277 291 437 504 630 H1, H4 - 208 240 240 277 416 480 600 H1, H3 - 198 228 208 263 395 456 570 H1, H2 -


Secondary Volts Connect lines to Inter-connect 240 X1, X4 X2-X3 120 X1, X2 X2-X4, X1-X3 120/240 X1, X2, X4 X2-X3


H1

H2

H3

H4

X1

H6X3

H5

X2










281

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

X2H2

H1

H3

X1X3

X0

123

45

67

X2H2

H1 H3

X1X3

X0

86

42

357

1

X2H2

H1

H3X1 X3X6

123

45

67

120V 120V

X2H2

H1 H3 X1 X3X6120V 120V

86

42

357

1


Primary Volts Connect lines to Inter-connect 218 504 630 H1, H2, H3 1-H1, 1-H2, 1-H3 213 492 615 H1, H2, H3 2-H1, 2-H2, 2-H3 208 480 600 H1, H2, H3 3-H1, 3-H2, 3-H3 203 468 585 H1, H2, H3 4-H1, 4-H2, 4-H3 198 456 570 H1, H2, H3 5-H1, 5-H2, 5-H3 193 444 556 H1, H2, H3 6-H1, 6-H2, 6-H3 188 432 542 H1, H2, H3 7-H1, 7-H2, 7-H3


Secondary Volts Connect lines to Inter-connect 208 480 X1, X2, X3 - 120 277 X1,X0 | X2,X0 | X3,X0 -

Primary Volts Connect lines to Inter-connect 218 504 630 H1, H2, H3 1-2 213 492 600 H1, H2, H3 2-3 208 480 570 H1, H2, H3 3-4 203 468 H1, H2, H3 4-5 198 456 504 H1, H2, H3 5-6 193 444 480 H1, H2, H3 6-7 188 432 456 H1, H2, H3 7-8


Secondary Volts Connect lines to Inter-connect 208 480 X1, X2, X3 - 120 277 X1,X0 | X2,X0 | X3,X0 -

Primary Volts Connect lines to Inter-connect 504 H1, H2, H3 1-H1, 1-H2, 1-H3 492 H1, H2, H3 2-H1, 2-H2, 2-H3 480 H1, H2, H3 3-H1, 3-H2, 3-H3 468 H1, H2, H3 4-H1, 4-H2, 4-H3 456 H1, H2, H3 5-H1, 5-H2, 5-H3 444 H1, H2, H3 6-H1, 6-H2, 6-H3 432 H1, H2, H3 7-H1, 7-H2, 7-H3




Primary Volts Connect lines to Inter-connect 504 H1, H2, H3 1-2 492 H1, H2, H3 2-3 480 H1, H2, H3 3-4 468 H1, H2, H3 4-5 456 H1, H2, H3 5-6 444 H1, H2, H3 6-7 432 H1, H2, H3 7-8








282


ENER

AL

INFO

RM

ATIO

N

H2

H3

H1

X1

X2

X3

1423

Primary Volts Connect lines to Inter-connect 630 H1, H2, H3 1-2 600 H1, H2, H3 2-3 570 H1, H2, H3 3-4



H2X2

H1

H3X1

X3

12

34

H0

X2H2

H1

H3

X1

X3

H2 X2

X0

X3H3H1

X1

42

13

H2X2

H1H3

X1X3

123

H0

54


Secondary Volts Connect lines to Inter-connect 460 480 600 H1, H2, H3 - 265 277 347 H1, H0 H2, H0 H3, H0 -

Primary Volts Connect lines to Inter-connect 218 252 X1, X2, X3 1 213 246 X1, X2, X3 2 208 240 X1, X2, X3 3 203 234 X1, X2, X3 4 198 228 X1, X2, X3 5


Primary Volts Connect lines to Inter-connect 208 240 416 480 600 H1, H2, H3 1-2 198 228 395 456 570 H1, H2, H3 2-3 187 216 374 432 540 H1, H2, H3 3-4

Secondary Volts Connect lines to Inter-connect

208 380 416 480 600 X1, X2, X3 - 120 220 240 277 347 X1, X0 X2, X0 X3, X0 -



Primary Volts Connect lines to Inter-connect 208 240 252 X1, X2, X3 1-2

198 228 240 X1, X2, X3 2-3188 216 228 X1, X2, X3 3-4


Secondary Volts Connect lines to 230 260 460 480 H1, H2, H3 133 139 265 277 H1, H0 H2, H0 H3, H0










283

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

H2

H3

H1

X1

X2

X3

1

64235

Primary Volts Connect lines to Inter-connect 630 504 H1, H2, H3 1-2 615 492 H1, H2, H3 2-3 600 480 H1, H2, H3 3-4 585 468 H1, H2, H3 4-5 570 456 H1, H2, H3 5-6


Secondary Volts Connect lines to Inter-connect 240 X1, X2, X3

H1

X4 X3 X2 X1

H2 H3 H4 H5 H6 H7 H8 H9 H10

Primary Volts Connect lines to Inter-connect 480 (60Hz) H1, H10 H5-H6 440 H1, H10 H5-H6 416 H1, H9 H4-H6 400 H1, H8 H3-H6 380 H1, H7 H2-H6 240 (60 Hz) H1, H10 H1-H6, H5-H10 220 H1, H10 H1-H6, H5-H10 208 H1, H9 H1-H6, H4-H9 200 H1, H8 H1-H6, H3-H8 190 H1, H7 H1-H6, H2-H7



HV HVH1 H3 H2 H4 H1 H3 H2 H4

OR

OR

7 8 6 4 2 1 3 5 7 8 6 4 2 1 3 5


LV

Primary Volts Connect lines to Inter-connect 440 H1, H4 1-H2, 2-H3, H2-H3 416 H1, H4 3-H2, 4-H3, H2-H3 400 H1, H4 5-H2, 6-H3, H2-H3 380 H1, H4 7-H2, 8-H3, H2-H3 220 H1, H4 1-H2, 2-H3, H1-H3, H2-H4 208 H1, H4 3-H2, 4-H3, H1-H3, H2-H4 200 H1, H4 5-H2, 6-H3, H1-H3, H2-H4 190 H1, H4 7-H2, 8-H3, H1-H3, H2-H4










284


ENER

AL

INFO

RM

ATIO

N

Primary Volts Connect lines to Inter-connect218 291 437 504 630 H1, H6 -213 284 426 492 615 H1, H5 -208 277 416 480 600 H2, H5 -203 270 406 468 585 H2, H4 -198 263 395 456 570 H3, H4 -



120/240 X1, X2, X4 X2-X3120 X1, X2 X2-X4, X1-X3

X4 X2 X3 X1

H1 H2 H3 H4 H5 H6

X4 X2 X3 X1

H1 H2 H3 H4 H5 H6

Primary Volts Connect lines to Inter-connect 480 H1, H4 1-H2, 2-H3, H2-H3 456 H1, H4 2-H3, 3-H2, H2-H3 432 H1, H4 3-H2, 4-H3, H2-H3 240 H1, H4 1-H2, 2-H3, H1-H3, H2-H4 216 H1, H4 3-H2, 4-H3, H1-H3, H2-H4



H1 H4H2H3

X4 X1X3X2

4213

Primary Volts Connect lines to Inter-connect208 277 416 480 600 H1, H4 -198 263 395 456 570 H1, H3 -188 249 374 432 540 H2, H3 -



120/240 X1, X2, X4 X2-X3120 X1, X2 X2-X4, X1-X3

X4 X2 X3 X1

H1 H2 H3 H4 H1 H2 H3 H4

X4 X2 X3 X1



Primary Volts Connect lines to Inter-connect380 H1, H3 -347 H1, H2 -



120/240 X1, X2, X4 X2-X3120 X1, X2 X2-X4, X1-X3

HV HV

H1 H2 H3 H2 H3H1

OR

OR X4 X1X3X2X4 X1X3X2

LV LV LV

LV






285

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION


H3

H2

H1

41

32

6

X0,Y0

Y3

Y2

Y1

X3

X2

X1

5

Angular Displacement

0°, -30°or

-15, -45

CENTURION 2

Primary Volts Connect lines to Inter-connect 218* 504 630 H1, H2, H3 1-2 213* 492 615 H1, H2, H3 2-3 208* 480 600 H1, H2, H3 3-4 203* 468 585 H1, H2, H3 4-5 198* 456 570 H1, H2, H3 5-6

Secondary Volts Connect lines to Inter-connect208 480 600 X1, X2, X3 -120 277 347 Y1, Y2, Y3 -

X1, X0/Y0 - X2, X0/Y0 - X3, X0/Y0 - Y1, X0/Y0 - Y2, X0/Y0 - Y3, X0/Y0 -

* Standard 2-2.5% FCAN and 2-2.5% FCBN primary taps for 208V H2EM units only available up to 75 kVA. Please consult factory for standard taps on 208V primary units over 75 kVA.

X2H2

H1

H3X1 X3

123

Primary Volts Connect lines to Inter-connect 218* 504 630 H1, H2, H3 1-H1, 1-H2, 1-H3

213* 492 615 H1, H2, H3 2-H1, 2-H2, 2-H3208* 480 600 H1, H2, H3 3-H1, 3-H2, 3-H3203* 468 585 H1, H2, H3 4-H1, 4-H2, 4-H3198* 456 570 H1, H2, H3 5-H1, 5-H2, 5-H3


Secondary Volts Connect lines to Inter-connect208 480 600 X1, X2, X3 -120 277 347 X1,X0 | X2,X0 | X3,X0 -

Angular Displacement

0° or -30°

CENTURION 1

H1 3 4

12

5

H2

H3

X1

X2

X3

X0

* Standard 2-2.5% FCAN and 2-2.5% FCBN primary taps for 208V H2EM units only available up to 75 kVA. Please consult factory for standard taps on 208V primary units over 75 kVA.



Primary Volts Connect lines to Inter-connect 480 H1, H2, H3 1 456 H1, H2, H3 2 432 H1, H2, H3 3








286


ENER

AL

INFO

RM

ATIO

N

X2H2

X1 X3

H1

123

45

67

H3

Primary Volts Connect lines to Inter-connect218 291 437 504 630 H1, H2 1213 284 426 492 615 H1, H2 2208 277 416 480 600 H1, H2 3203 270 406 468 585 H1, H2 4198 263 395 456 570 H1, H2 5

Primary Volts Connect lines to Inter-connect277 H1, H5 -240 H1, H4 -208 H1, H3 -120 H1, H2 -



120/240 X1, X2, X4 X2-X3120 X1, X2 X2-X4, X1-X3


120/240 X1, X2, X4 X2-X3120 X1, X2 X2-X4, X1-X3

HV HV

H1 H2

12345

H1

OR

OR X4 X1 X3 X2X4 X1 X3 X2

LV LV LV

LV

H2

12345

H2X2

H1H3

X1X3

123

H0

Primary Volts Connect lines to Inter-connect 208 240 X1, X2, X3 1 198 228 X1, X2, X3 2 188 216 X1, X2, X3 3


Secondary Volts Connect lines to 230 260 460 480 H1, H2, H3 133 139 265 277 H1, H0 H2, H0 H3, H0

HV HV

H1 H4H2H5H3

H4H2H5H3

H1

OR

OR X4 X1 X3 X2X4 X1 X3 X2

LV LV LV

LV



Primary Volts Connect lines to Inter-connect 504 H1, H2, H3 1 492 H1, H2, H3 2 480 H1, H2, H3 3 468 H1, H2, H3 4 456 H1, H2, H3 5 444 H1, H2, H3 6 432 H1, H2, H3 7









287

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

H1 H2

X2 X1

3 4 2 1

X4 X6 X5 X3


HV HVH1 H2 H1 H2

OR

OR

4 2 1 3 4 2 1 3


LV


X2H2

H1

H3X1 X3

123

45


Primary Volts Connect lines to Inter-connect380 H1, H2 1-2347 H1, H2 3-4


120/240 X1, X2, X4 X2-X3120 X1, X2 X2-X4, X1-X3

H1

X3 X1

H2 H3

X2



Primary Volts Connect lines to Inter-connect480 H1, H2 1-2277 H1, H2 3-4

Secondary Volts Connect lines to Inter-connect277 X1, X2 X5-X6208 X1, X2 X3-X4

Primary Volts Connect lines to Inter-connect 630 H1, H2, H3 1 615 H1, H2, H3 2 600 H1, H2, H3 3 585 H1, H2, H3 4 570 H1, H2, H3 5



Primary Volts Connect lines to Inter-connect480 H1, H3 -277 H1, H2 -

Secondary Volts Connect lines to Inter-connect277 X1, X3 -208 X1, X2 -






288


ENER

AL

INFO

RM

ATIO

N


Primary Volts Connect lines to Inter-connect347 H1, H2 H2-3 & 4380 H1, H2 H2-1 & 2

Secondary Volts Connect lines to Inter-connect240 X1, X4 X2-X3120 X1, X2 X1-X3, X2-X3

120/240 X1, X2, X4 X2-X3

H1 H2

X4 X2 X3 X1 X1X3X2X4

13

24 4 2

3 1H2H1



HV HVH1 H2 H1 H2

OR

OR

7 8642135 7 8642135

X4 X1X3X2X4 X1X3X2LV LV LV

LV

Primary Volts Connect lines to Inter-connect480 (60Hz) H1, H2 1-2

440 H1, H2 1-2416 H1, H2 3-4400 H1, H2 5-6380 H1, H2 7-8

240 (60Hz) H1, H2 H1-2, H2-1220 H1, H2 H1-2, H2-1208 H1, H2 H1-4, H2-3200 H1, H2 H1-6, H2-5190 H1, H2 H1-8, H2-7


Secondary Volts Connect lines to Inter-connect240 X1, X4 X2- X3120 X1, X2 X2-X4, X1-X3

120/240 X1, X2, X4 X2-X3

Primary Volts Connect lines to Inter-connect630 H1, H2, H3 1-H1, 1-H2, 1-H3615 H1, H2, H3 2-H1, 2-H2, 2-H3600 H1, H2, H3 3-H1, 3-H2, 3-H3585 H1, H2, H3 4-H1, 4-H2, 4-H3570 H1, H2, H3 5-H1, 5-H2, 5-H3480 H1, H2, H3 6-H1, 6-H2, 6-H3456 H1, H2, H3 7-H1, 7-H2, 7-H3432 H1, H2, H3 8-H1, 8-H2, 8-H3


Secondary Volts Connect lines to Inter-connect 480 X1, X2, X3 - 277 X1,X0 | X2,X0 | X3,X0 -

6

12

34

5

H1

H3

H2

8

X3X1

X2

X0






289

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION



1 - Main Breaker2 - Transformer3 - Panel Board4 - Panel Board Feed Breaker5 - Neutral6 - Bond When Required7 - Ground When Required

• The maximum continuous load current not to exceed 100% of the transformer nominal current.• The maximum continuous load current for the branch circuits not to exceed 80% of the ratings of the circuit

breakers employed in other than motor circuits.• Maximum short-circuit capacity 10,000 ampls

SCD 49 SCD 50






290


ENER

AL

INFO

RM

ATIO

N



1 - Main Breaker2 - Transformer3 - Panel Board4 - Panel Board Feed Breaker5 - Neutral6 - Bond When Required7 - Ground When Required

• The maximum continuous load current not to exceed 100% of the transformer nominal current.• The maximum continuous load current for the branch circuits not to exceed 80% of the ratings of the circuit

breakers employed in other than motor circuits.• Maximum short-circuit capacity 10,000 ampls

SCD 51






260

GENERAL INFORMATION

GEN

ERA

L IN

FOR

MAT

ION

CaseStyle

Dimensions in InchesA B B1 C D E H K1 L MA MB

NH3 26.00 25.00 24.00 38.00 24.00 2.50 14.00 2.00 X 3.00 2.50 21.50 19.00

NH4 32.00 29.50 28.50 41.00 24.00 2.50 12.00 2.00 X 3.00 2.50 23.50 23.50

CaseStyle

Dimensions in Inches

A A1 B B1 C D E F G H K1 L MA MBNH5 19.40 16.75 20.20 15.00 21.50 12.00 2.00 7.00 7.81 6.00 1.38 X 1.75 2.80 18.00 9.00

NH6 23.90 21.50 25.00 19.50 28.75 17.00 2.00 8.00 10.29 8.50 1.75 X 2.50 5.20 22.75 9.00

Note: Mounting hole dimension is 0.56” diameter.



‘NH’ SERIES ENCLOSURES

NEMA 3R ENCLOSURE DIMENSIONAL DRAWINGS

FRONT VIEW SIDE VIEW

F

BMAA

A1

MA

B1

D

H

MB

E

C

K

L

0.56 Dia.(4)

0.50KeyholeSlot (4)

BA

CK

All Dimensions in Inches

G

MA

FRONT VIEW SIDE VIEW

A

C

D

H

K

B1

MBL

E

0.56 Dia.(4)

BB

AC

K


OptiOnal nEMa 4, 12 and StainlESS StEEl EnclOSurES arE availablE.SEE pagE 266 & 267 fOr dEtailS.


1 Knockout (K) sizes are actual diameters of knockout, not conduit sizes. Refer to table on page 260 for conduit sizes.

1 Knockout (K) sizes are actual diameters of knockout, not conduit sizes. Refer to table on page 260 for conduit sizes.






261

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

CaseStyle


A B B1 C D E F G H L M MA MBNJ1 39.50 34.00 30.00 51.50 35.50 6.00 8.00 4.00 7.75 1.00 34.00 24.00 32.00

NJ2 48.50 38.40 34.00 59.00 40.00 8.00 8.00 4.00 10.50 1.00 38.00 27.50 36.00

NJ4 32.00 32.50 28.50 50.00 34.00 8.00 8.00 4.00 5.00 1.00 32.50 22.00 30.50

CaseStyle


A B B1 C D E F G H L M MA MBNJ3 51.50 43.40 39.00 66.00 47.00 10.00 8.00 4.00 8.75 1.00 43.00 34.00 41.00

NJ6 64.00 44.40 40.00 71.00 50.00 11.50 9.00 5.00 12.00 1.00 44.00 40.00 42.00

NJ7 64.00 51.40 47.00 75.00 54.00 11.50 9.00 5.00 12.00 1.00 51.00 40.00 49.00



‘NJ’ SERIES ENCLOSURES

NEMA 3R ENCLOSURE DIMENSIONAL DRAWINGS

FRONT VIEW SIDE VIEW All Dimensions in Inches

H MA 0.69 (4)

A

M

MBL

FG

2.0

E

2.0

C D

B1

B

Recommendedarea for cable cutout.

BA

CK

FRONT VIEW SIDE VIEW All Dimensions in Inches

BA

CK

Recommendedarea for cable cutout.

H MA0.69 (4)

A

M

MBL

F G

2.0

E

2.0

DC

B1

B









262

GENERAL INFORMATION

GEN

ERA

L IN

FOR

MAT

ION

CaseStyle Fig #


NQ0 1 3.75 5.25 7.25 2.50 5.63 6.25 1.50 2.00 -- 0.88 -- -- 0.22 1.25 --NQ1 1 4.50 5.75 7.25 3.13 5.63 6.25 1.50 2.00 0.81 0.88 -- -- 0.22 1.25 --NQ2 1 5.00 4.75 9.25 3.88 7.75 8.25 1.50 2.00 1.00 0.88 X 1.13 X 1.38 -- -- 0.22 1.25 --NQ3 1 5.88 5.50 10.50 4.13 8.25 9.00 1.50 2.00 1.25 0.88 X 1.13 X 1.38 -- -- 0.28 1.25 --NQ4 1 7.00 6.50 11.75 5.38 9.50 10.25 1.75 2.00 1.50 0.88 X 1.13 X 1.38 -- -- 0.28 1.25 --NQ5 2 10.00 7.75 17.25 7.38 15.38 15.25 2.375 2.00 4.00 1.13 X 1.38 6.00 0.75 0.44 1.25 1.68

NQ6A 2 12.25 9.25 17.63 9.38 14.88 15.56 2.00 2.00 5.00 1.38 X 2.50 8.00 0.75 0.44 2.00 1.68NQ6 2 12.25 9.25 20.88 9.38 18.13 18.88 2.00 2.00 5.00 1.38 X 2.50 8.00 0.75 0.44 2.00 1.68NQ7 2 14.50 10.75 21.38 11.63 18.63 19.38 2.00 2.00 6.00 1.38 X 2.50 10.00 0.75 0.44 2.00 1.81NQ8 2 14.50 10.75 27.38 11.13 24.50 24.88 2.00 2.00 6.00 1.38 X 2.50 10.00 0.75 0.56 2.00 1.81


‘NQ’ SERIES ENCLOSURESNEMA 3R ENCLOSURE DIMENSIONAL DRAWINGS


A

C

G

F

BØM

H

.34

LØN

ØN D

J

E

K (K.O.)

K (K.O.)

P

R


BA

CK

Figure 2

A

C

B

F

G

K (K.O.)

.39

H

D

E

J

ØN

ØNK (K.O.)

P

A/2


BA

CK

Figure 1






263

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

CaseStyle Fig #


NQT2 1 9.38 4.94 8.63 8.38 4.00 - 7.06 2.38 4.50 0.88 X 1.13 - - 0.28 1.81 2.44NQT3 1 12.38 5.44 11.13 11.38 6.50 - 9.50 2.38 5.50 0.88 X 1.13 - - 0.28 1.81 3.44NQT4 1 15.19 6.94 15.13 13.88 9.25 - 13.56 1.88 5.50 0.88 X 1.13 - - 0.28 3.06 4.19NQT5 1 16.63 10.25 16.63 14.50 8.25 - 13.88 2.69 10.00 1.38 X 1.75 - - 0.41 4.50 2.25NQT6 1 19.25 10.44 16.63 17.50 8.25 - 13.56 2.69 12.50 1.38 X 2.50 - - 0.41 4.50 2.50NQT7 2 20.25 13.00 23.38 12.00 11.75 11.38 17.94 2.50 13.75 1.38 X 2.50 4.25 17.94 0.56 - 2.13NQT8 2 22.25 13.00 28.38 14.00 11.75 11.38 21.94 2.50 15.75 1.38 X 2.50 4.25 21.94 0.56 - 2.13NQT9 2 31.25 16.00 29.88 18.00 14.75 14.13 23.94 2.75 22.75 2.00 X 3.00 6.50 23.94 0.56 - 3.13

NQT9A 2 34.63 18.50 36.75 22.50 17.25 16.50 30.38 4.69 27.25 2.00 X 3.00 6.50 30.38 0.56 - 3.31NQS10 2 21.88 18.50 31.00 13.50 17.25 16.50 24.63 4.91 13.13 1.75 X 2.50 6.50 24.63 0.56 - 4.00NQT10 3 38.44 26.00 39.13 23.50 24.00 20.80 32.50 6.40 24.75 2.50 X 3.63 8.00 32.50 0.69 - 6.84NQT11 3 37.38 30.00 45.63 23.50 28.00 22.00 39.00 6.95 24.75 2.50 X 3.63 8.00 39.00 0.69 - 6.31


‘NQT & NQS’ SERIES ENCLOSURESNEMA 3R ENCLOSURE DIMENSIONAL DRAWINGS

FRONT VIEW REAR VIEWSIDE VIEWθ N(4)

BA

CK


A

B

C

D E

G

FJL H

0.56 Typ.

M

R

0.63 Typ.

K (K,O)(4)

3.0

0.69 Typ.Easy access to wiring compartment viaABS approved hardware on top cover.

The Lifting Provisions on NQT7,NQT8 and NQT9 enclosures are located in the wiring compartment.

Figure 2

FRONT VIEW REAR VIEW SIDE VIEW

B

AD H

E C

K (K,O)(4)

Pθ N(4)

Lifting Provision on NQT4, NQT5 and NQT6.

BA

CK


G G

J

R

1.26

Easy access to wiring compartment via (4) HHCS on top cover.

θ 1.0(2)

Figure 1







264

GENERAL INFORMATION

GEN

ERA

L IN

FOR

MAT

ION


NEMA 2 ENCLOSURE DIMENSIONAL DRAWINGS

10.50” (267)

10.00” (254)12

.00”

(305

)

14.00” (356)

14.00” (356)

1.75

” (44

)

2.00

” (51

)

0.13

” (3)

4 - R

aise

d M

ount

ing

Feet

with

ø0

.188

” mou

ntin

g ho

le in

cen

ter.

6.50” (165)

7.00” (178)

8.00

” (20

3)

8.00” (203)

10.00” (254)

0.75

” (19

)

1.50

” (38

)

0.12

5” (3

)

4 - R

aise

d M

ount

ing

Feet

with

ø0

.188

” mou

ntin

g ho

le in

cen

ter.

‘N1’ SERIES ENCLOSURE ‘N2’ SERIES ENCLOSURE

Conduit Size vs. Actual Knockout Size Reference TableStandard Conduit Size Actual Kockout Diameter

1/2” 7/8”3/4” 1 1/8”1” 1 3/8”

1 1/4” 1 3/4”1 1/2” 2”

2” 2 1/2”2 1/2” 3”

3” 3 5/8”3 1/2” 4 1/8”

FRONT VIEW REAR VIEWSIDE VIEW


BA

CK

Easy access to wiring compartmentvia (4) HHCS on top cover.

θ N(4)

A

B

C

D E

G

FJL H

1.19 Typ.

M

R

1.00 Typ.

K (K,O)(4)

1.53

1.13 Typ.

The Lifting Provisions on the NQT10and NQT11 enclosures are locatedin the wiring compartment.

Figure 3

‘NQT & NQS’ SERIES ENCLOSURESNEMA 3R ENCLOSURE DIMENSIONAL DRAWINGS CONTINUED






265

GEN

ERA

L IN

FOR

MATIO

N

GENERAL INFORMATION

Case StyleDimensions in Inches

A B C D E F G H MA MB MNH3-N3RE 26.00 38.00 42.00 2.25 8.00 0.75 26.00 18.00 21.50 19.00 20.63NH4-N3RE 32.00 42.00 45.00 4.25 8.00 0.75 29.00 18.00 23.50 23.50 25.13

Case StyleDimensions in Inches

A B C D E F MA MB MNJ1-N3RE 39.50 55.00 57.50 7.63 10.00 1.00 24.00 32.00 34.00NJ2-N3RE 48.50 60.00 65.00 10.38 10.00 1.00 27.50 36.00 38.00NJ3-N3RE 51.50 65.00 72.00 8.52 10.00 1.00 34.00 41.00 43.00NJ4-N3RE 32.00 54.00 56.00 4.88 10.00 1.00 22.00 30.50 32.50NJ6-N3RE 64.00 70.00 83.00 12.00 12.00 1.00 40.00 42.00 44.00NJ7-N3RE 64.00 77.00 83.00 12.00 12.00 1.00 40.00 49.00 51.00


TYPE 3RE ENHANCED ENCLOSURE DIMENSIONAL DRAWINGS‘NH’ SERIES ENCLOSURES

‘NJ’ SERIES ENCLOSURES

0.56 DIA (4)FD

E

MBMA

B

C

M

A MAX

THERMOMETERFOR

PROVISION

REMOVABLEFILTER

FILTERREMOVABLE

FRONT VIEW SIDE VIEWAll Dimensions in Inches

MAX

F

E

MD 0.56 DIA. (4)MB

MA

2.00 X 3.00

H2.50

G

BA

C

REMOVABLEFILTER

FILTERREMOVABLE

FRONT VIEW SIDE VIEWAll Dimensions in Inches

Documents

Buck-Boost - American Rotary transformers are conventional low voltage, single phase distribution transformers, with standard primary voltages of 120, 240 or 480 volts, and secondary