Why Choose the ETE WV400P7S7 400 VA Wide-Input-Voltage Control Transformer?
The ETE WV400P7S7 is a versatile 400 VA single-phase wide-input-voltage control transformer designed to provide reliable low-voltage AC power for industrial control circuits, electrical panels and automation equipment. As part of the ETE WV wide-input-voltage control transformer series, it is suitable for panel builders, OEM machinery manufacturers and industrial electrical engineers requiring flexible voltage transformation across multiple industrial supply voltages.
Featuring 0/380/400/420/440/460/480 V primary terminals, the WV400P7S7 accommodates six nominal primary supply voltages through dedicated winding taps. Its two 0/24 V secondary windings can be connected in parallel to provide a 24 V AC output or connected in series to provide a 48 V AC output. This flexible secondary configuration makes the transformer particularly useful for industrial installations requiring either 24 V or 48 V control power.
With a rated capacity of 400 VA (0.4 kVA), Class E insulation and 8% voltage regulation, the ETE WV400P7S7 provides a practical solution for industrial control power distribution. Its dimensions of 120 × 108 × 120 mm and weight of 5.5 kg allow integration into suitably designed electrical control panels. The specified enclosure references are EPH 3 or EPN 2.
Key Advantages
- 400 VA single-phase control transformer designed for industrial electrical and automation applications.
- Wide primary voltage selection from 380 V to 480 V AC through dedicated winding taps.
- Six primary voltage options accommodate different industrial electrical supply systems.
- Dual 0/24 V secondary windings provide flexible output configurations.
- 24 V AC parallel output suitable for compatible industrial control circuits.
- 48 V AC series output supports equipment requiring a higher control voltage.
- 400 VA rated capacity provides power for multiple control devices within the transformer's loading limits.
- 8% voltage regulation provides a defined performance characteristic for electrical system design.
- Class E insulation supports reliable operation within the specified thermal limits.
- Compact 120 × 108 × 120 mm construction supports integration into industrial electrical panels.
- EPH 3 or EPN 2 enclosure references provide flexibility when selecting an appropriate enclosure.
- Multiple primary taps and configurable secondary windings help standardise transformer selection across compatible installations.
Key Features
- ETE WV wide-input-voltage control transformer series.
- 400 VA rated apparent power.
- Single-phase transformer construction.
- Primary terminal configuration: 0/380/400/420/440/460/480 V.
- Primary voltage selections: 380, 400, 420, 440, 460 or 480 V AC.
- Secondary winding 1: 0/24 V.
- Secondary winding 2: 0/24 V.
- Parallel secondary output: 24 V AC.
- Series secondary output: 48 V AC.
- Dual secondary winding arrangement for flexible voltage configuration.
- Voltage regulation: 8%.
- Insulation class: E.
- Overall length: 120 mm.
- Overall width: 108 mm.
- Overall height: 120 mm.
- Transformer weight: 5.5 kg.
- Enclosure references: EPH 3 or EPN 2.
- Designed for industrial control power applications requiring adaptable primary and secondary voltage connections.
Reliable 24 V and 48 V Control Power for Industrial Automation
Industrial control transformers convert an available AC supply voltage into a suitable secondary voltage for control circuits and electrical equipment. The ETE WV400P7S7 provides a flexible solution for installations using nominal primary voltages of 380, 400, 420, 440, 460 or 480 V AC. By selecting the appropriate primary terminal, the transformer can be configured for the available industrial supply without requiring a different transformer model for each listed voltage.
The transformer's two 0/24 V secondary windings provide additional installation flexibility. When correctly connected in parallel, the windings supply a nominal 24 V AC output, with the load shared between the two windings. Alternatively, connecting the windings in series provides a nominal 48 V AC output. The total transformer rating remains 400 VA in either configuration. Parallel connections require correct winding polarity and matching voltage taps, while series connections must follow the manufacturer's approved terminal arrangement.
The specified 8% voltage regulation should be considered when selecting connected equipment, particularly where the secondary load varies during operation. Its Class E insulation, practical dimensions and EPH 3 or EPN 2 enclosure references support integration into appropriately designed industrial electrical installations. Correct primary tap selection, secondary wiring, overload protection and ventilation are important for dependable transformer operation.
Typical Applications
- Industrial electrical control panels and automation cabinets.
- 24 V AC industrial control circuits.
- 48 V AC control power applications.
- Industrial relays, contactors and control devices requiring AC supplies.
- Motor control panels and electrical machinery control circuits.
- Industrial signalling and indication systems.
- Factory automation and production machinery.
- OEM equipment requiring flexible primary voltage selection.
- Industrial process control equipment.
- Electrical panel building and control system integration.
- Commercial and industrial equipment requiring a dedicated low-voltage AC supply.
- Replacement or upgrade projects requiring a compatible 400 VA control transformer.
