Schneider Electric 9070 manual Application, Example of Series and Parallel Connections

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Industrial Control Transformers

Application

APPLICATION

In preparation for connecting power to the primary side of dual voltage single-phase transformers, it's necessary to first wire the two windings in either series or parallel to match the incoming voltage. An example of this is common transformers with a primary voltage description of 240 x 480. The windings are rated for the lower of the two voltages show on either side of the 'x'. Connecting the windings in series allows for the higher of the two voltages. Connecting the windings in parallel allows for the lower of the two voltages.

Example of Series and Parallel Connections

Jumper

H1 H3 H2 H4

X4

X2

X3

X1

Jumper

Series Connections

JumperJumper

H1	H3	H2	H4
X4	X2	X3	X1
Jumper			Jumper

Parallel Connections

NOTE: This diagram is for illustration purposes only. Actual units will have different combinations. See diagrams for actual connections.

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08/2005

© 1999–2005 Schneider Electric All Rights Reserved

Image 55

Contents Industrial Control Transformers Page Product Description Product DescriptionType T VA Ratings Type T TransformersType T Transformers CE Marking95% 90% 85% Regulation Chart for Type TSelection Guide Secondary VoltageSource Load Voltage Go To Codes Pages Type T Transformers for 120 Volt LoadsSingle Dual Custom-Built Type T TransformersType T Transformers for 24 Volt Loads One Primary Tap Two Primary TapsVoltages DimensionsVolt Control Secondary Voltage and Connection OptionsVoltages Connections Key Type T MultiTap TransformersCatalog Acc Slots Number1 ConnectionsVoltage Voltages Connections Volt SecondaryPrimary Secondary UniversalCatalog Type T Transformers with Dual Secondary120/240 Volt Secondary Voltage VoltagesCatalog Acc Slots Number1 Key Catalog Acc Type T Transformers with 24 Volt SecondaryNumber1 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 Acc 115Slots Only Catalog 115V 24V9070T50D114 B D a B 150 Exceed Primary Max 200 9070T200t 120 114 Load Type T Performance Data0PF 100% 75% 50% 25% 60HZ 50HZ WattsType T Special Quote Request Sheet Type EO VA Ratings Regulation Chart for Type EOType EO Transformers Type EO TransformersType EO Transformers for 24 Volt Loads Type EO Transformers for 120 Volt LoadsCatalog Slots Number Voltage Voltages Catalog Slots Number19070EO17 t Voltages Connections Inrush x FL RMS Type EO Performance DataCatalog Core Coil FL Total Reg Eff BTU/hr 0PF 100% 75% 50% 25% 60HZTransformers 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 Fuse Protection Options Description of Accessory KeysFingersafe Covers not supplied with unit AccessoriesClass Type VA Accessory Key Description VA Accessory KeyVolts Primary Fusing to Meet NECVolts Volts Secondary Fuse Rating Primary Fusing to Meet CESecondary Fusing to Meet NEC and CE Recommended Fuse Sizes for the Secondary to Meet NEC and CEVolt Control Secondary-Primary and Secondary Fuse Block Type TF Transformers9070TF25D20 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 Secondary Fuse Clips Jumper Fuse ClipTerminal Blocks Application ApplicationExample of Series and Parallel Connections Example of a typical application SolutionTechnical Data Frequently Asked Questions Frequently Asked QuestionsQuestion Answer Selecting a 9070 Type T control transformer? Schneider Electric USA