Schneider Electric 9070 manual Technical Data

Page 57

Industrial Control Transformers

Application

Technical Data

50/60 Hertz

Transformers that are dual rated for 50/60 Hz are truly global units and no derating is required for voltages or VA. (Type T are 50/60 Hz; Type EO are 60 Hz with de-rating for 50 Hz).

Base Plates

The development of welded cores has allowed the incorporation of base plates on larger VA transformers. Base plates are usually welded to the core of the transformer for a solid connection to the transformer. They allow manufacturers to offer more standardized mounting for specific VA sizes by allowing multiple core stacks. Available for Type T transformers only.

Touch-Safe Terminals

Being able to offer touch-safe terminals is increasing in importance. Currently all equipment that must comply with EN 60-204 (Machine and Low Voltage Directives) must have some type of barrier for live parts. Besides the CE standard listed above, domestic customers are requiring barriers on live parts with voltages above 460 V. These customers allow Plexiglas™ covers to be installed for these barriers.

Type T transformers can be made Fingersafe® by using snap-on covers that are removable with a screwdriver or other flat tool. Covers are sold separately.

Formed Terminal Board

Formed terminal boards are used on multiple VA ranges and different voltage combinations. This allows the manufacturer to punch jumpers for customer interconnections and gives the customer the same basic layout for all units. The snap-on covers for touch-safe terminations also are available on units with formed terminal boards. Available for Type T transformers only.

Varnish Vacuum Impregnation

This is a manufacturing process for the core and coil of industrial control transformers. The transformer is put into a tank of varnish, then the varnish is put into a vacuum, causing the varnish to be forced throughout the coil and core. After being vacuum impregnated, the units are cured in an oven to seal the varnish. The varnish is absorbed by any paper insulation system and coats other insulation with another layer of electrical strength. The process causes the coil to have a very tight connection because it is completely bonded and mechanically very strong. The cores are also tightly bonded with the varnish, causing the units to have better heat transfer and less vibration noise.

Schneider Electric uses this process on all control transformers, using a clear varnish with optimum electrical characteristics.

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© 1999–2005 Schneider Electric All Rights Reserved

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Contents Industrial Control Transformers Page Product Description Product DescriptionType T Transformers Type T TransformersCE Marking Type T VA RatingsSelection Guide Regulation Chart for Type TSecondary Voltage 95% 90% 85%Source Load Voltage Go To Codes Pages Type T Transformers for 120 Volt LoadsType T Transformers for 24 Volt Loads Custom-Built Type T TransformersOne Primary Tap Two Primary Taps Single DualVolt Control Secondary DimensionsVoltage and Connection Options VoltagesVoltages Connections Catalog Acc Slots Number1 Type T MultiTap TransformersConnections KeyVoltage Voltages Connections Volt SecondaryPrimary Secondary Universal120/240 Volt Secondary Type T Transformers with Dual SecondaryVoltage Voltages CatalogCatalog 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 Type T Units with Dual 24/120 Volt Secondary Tapped Units 120Only Slots Only Catalog 115115V 24V Acc9070T50D114 B D a B 150 Exceed Primary Max 200 9070T200t 120 114 0PF 100% 75% 50% 25% 60HZ 50HZ Type T Performance DataWatts LoadType T Special Quote Request Sheet Type EO Transformers Regulation Chart for Type EOType EO Transformers Type EO VA RatingsType EO Transformers for 24 Volt Loads Type EO Transformers for 120 Volt LoadsCatalog Slots Number Voltage Voltages Catalog Slots Number19070EO17 t Voltages Connections Catalog Core Coil FL Total Reg Eff BTU/hr Type EO Performance Data0PF 100% 75% 50% 25% 60HZ Inrush x FL RMSTransformers with Leads Transformers with LeadsClass 9070 Type EL, KL Matrix for Choosing Proper Fuse Configuration Fuse ProtectionFuse Protection H3 H2 X2X1 H1H4 H1H4 H3 H2 Fuse Protection Options Description of Accessory KeysClass Type VA Accessory Key Description AccessoriesVA Accessory Key Fingersafe Covers not supplied with unitPrimary Fusing to Meet NEC VoltsVolts Secondary Fusing to Meet NEC and CE Primary Fusing to Meet CERecommended Fuse Sizes for the Secondary to Meet NEC and CE Volts Secondary Fuse RatingVolt 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
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