Schneider Electric 9070 manual Primary Fusing to Meet NEC, Volts

Page 40

Industrial Control Transformers

Fuse Protection

Primary Fusing to Meet NEC

Recommended Fuse Sizes for the PRIMARY (use class CC time delay fuses) to Meet NEC

 

 

120 Volts

 

 

240 Volts

 

 

480 Volts

 

 

600 Volts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VA

 

Fuse

Fuse

 

Fuse

Fuse

 

Fuse

Fuse

 

Fuse

Fuse

Primary

Rating

Primary

Rating

Primary

Rating

Primary

Rating

Rating with

Rating with

Rating with

Rating with

 

Current

Secondary

without

Current

Secondary

without

Current

Secondary

without

Current

Secondary

without

 

Amperes

Secondary

Amperes

Secondary

Amperes

Secondary

Amperes

Secondary

 

Protection

Protection

Protection

Protection

 

 

Protection

 

Protection

 

Protection

 

Protection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

0.21

1/2

1/2

0.10

1/4

1/4

0.05

1/8

1/8

0.04

1/10

1/10

 

 

 

 

 

 

 

 

 

 

 

 

 

50

0.41

1

1

0.21

1/2

1/2

0.10

2/10

2/10

0.08

2/10

2/10

 

 

 

 

 

 

 

 

 

 

 

 

 

75

0.63

1-1/2

1-1/2

0.31

6/10

6/10

0.16

3/10

3/10

0.13

3/10

3/10

 

 

 

 

 

 

 

 

 

 

 

 

 

100

0.83

2

2

0.42

1

1

0.21

1/2

1/2

0.17

4/10

4/10

 

 

 

 

 

 

 

 

 

 

 

 

 

150

1.25

3

3

0.63

1-1/2

1-1/2

0.31

6/10

6/10

0.25

6/10

6/10

 

 

 

 

 

 

 

 

 

 

 

 

 

200

1.67

4

4

0.83

2

2

0.42

1

1

0.33

8/10

8/10

 

 

 

 

 

 

 

 

 

 

 

 

 

250

2.08

5

3-2/10

1.04

2-1/2

2-1/2

0.52

1-1/2

1-1/4

0.42

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

300

2.50

6-1/4

4

1.25

3

3

0.63

2

1-1/2

0.50

1-1/8

1-1/8

 

 

 

 

 

 

 

 

 

 

 

 

 

350

2.92

7

4-1/2

1.46

3-1/2

3-1/2

0.73

2-1/2

1-8/10

0.58

1-4/10

1-4/10

 

 

 

 

 

 

 

 

 

 

 

 

 

500

4.17

10

6-1/4

2.08

5

3-2/10

1.04

3

2-1/2

0.83

2

2

 

 

 

 

 

 

 

 

 

 

 

 

 

750

6.25

15

10

3.13

7-1/2

5

1.56

3-1/2

3-1/2

1.25

3

3

 

 

 

 

 

 

 

 

 

 

 

 

 

1000

8.33

20

12

4.17

10

6-1/4

2.08

5

3-2/10

1.67

4

4

 

 

 

 

 

 

 

 

 

 

 

 

 

1500

12.50

N/A

15

6.25

15

10

3.13

7-1/2

5

2.50

6-1/4

4

 

 

 

 

 

 

 

 

 

 

 

 

 

2000

16.66

N/A

20

8.33

20

12

4.17

10

6 1/4

3.33

8

5

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTES:

•Recommended fuse sizes per NEC Article 450-3.

•Transformers with primary only, select protection at 125%, if a standard size rating is not available, go to next higher rating.

•Transformers with primary only and current rating is less than 9 A, select protection at no more than 167%.

•Transformers with primary only and current rating is less than 2 A, select protection at no more than 300%.

•Transformers with primary and secondary, select primary protection at not more than 250% and secondary at 125%. If a standard size rating is not available, go to next higher standard rating.

40

© 1999–2005 Schneider Electric All Rights Reserved

 

 

 

08/2005

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Contents Industrial Control Transformers Page Product Description Product DescriptionType T Transformers Type T TransformersCE Marking Type T VA RatingsRegulation Chart for Type T Selection GuideSecondary Voltage 95% 90% 85%Type T Transformers for 120 Volt Loads Source Load Voltage Go To Codes PagesCustom-Built Type T Transformers Type T Transformers for 24 Volt LoadsOne Primary Tap Two Primary Taps Single DualDimensions Volt Control SecondaryVoltage and Connection Options VoltagesVoltages Connections Type T MultiTap Transformers Catalog Acc Slots Number1Connections KeyVolt Secondary Voltage Voltages ConnectionsUniversal Primary SecondaryType T Transformers with Dual Secondary 120/240 Volt SecondaryVoltage Voltages CatalogCatalog Acc Slots Number1 Key Type T Transformers with 24 Volt Secondary Catalog AccNumber1 Key 9070T50D19 Type T Units with Dual 12/24 Volt Secondary Multiple Secondary Multiple SecondaryAmps 120 Type T Units with Dual 24/120 Volt Secondary Tapped UnitsOnly 115 Slots Only Catalog115V 24V Acc9070T50D114 B D a B 150 Exceed Primary Max 200 9070T200t 120 114 Type T Performance Data 0PF 100% 75% 50% 25% 60HZ 50HZWatts LoadType T Special Quote Request Sheet Regulation Chart for Type EO Type EO TransformersType EO Transformers Type EO VA RatingsType EO Transformers for 120 Volt Loads Type EO Transformers for 24 Volt LoadsCatalog Slots Number Catalog Slots Number1 Voltage Voltages9070EO17 t Voltages Connections Type EO Performance Data Catalog Core Coil FL Total Reg Eff BTU/hr0PF 100% 75% 50% 25% 60HZ Inrush x FL RMSTransformers with Leads Transformers with LeadsClass 9070 Type EL, KL Fuse Protection Matrix for Choosing Proper Fuse ConfigurationFuse Protection H3 H2 X2X1 H1H4 H1H4 H3 H2 Description of Accessory Keys Fuse Protection OptionsAccessories Class Type VA Accessory Key DescriptionVA Accessory Key Fingersafe Covers not supplied with unitVolts Primary Fusing to Meet NECVolts Primary Fusing to Meet CE Secondary Fusing to Meet NEC and CERecommended Fuse Sizes for the Secondary to Meet NEC and CE Volts Secondary Fuse RatingType TF Transformers Volt Control Secondary-Primary and Secondary Fuse Block9070TF25D20 Field Installed Fuse Options Field Installed Fuse OptionsPrimary Fusing R01A R01B Primary and Secondary Fusing R11A R11B R12A R12B Secondary Fusing S22A S22B SF25A SF25B AP1 AP2 Jumper Fuse Clip Secondary Fuse ClipsTerminal Blocks Application ApplicationExample of Series and Parallel Connections Solution Example of a typical applicationTechnical Data Frequently Asked Questions Frequently Asked QuestionsQuestion Answer Selecting a 9070 Type T control transformer? Schneider Electric USA
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