Why Choose the ETE WV50P7S8 50 VA Wide-Input-Voltage Control Transformer?
The ETE WV50P7S8 is a versatile 50 VA single-phase wide-input-voltage control transformer designed to provide reliable AC voltage conversion for industrial control panels, electrical machinery and automation systems. Part of the ETE WV wide-input-voltage transformer range, it features multiple primary voltage taps and dual secondary windings, making it suitable for equipment operating across different industrial supply voltages.
The WV50P7S8 features a 0/380/400/420/440/460/480 V primary terminal arrangement, allowing selection of the appropriate input connection for compatible AC supplies between 380 V and 480 V. Its two 0/110/120 V secondary windings can be connected in parallel to provide 110 V or 120 V AC, or in series to provide 220 V or 240 V AC, according to the required voltage configuration.
With a rated apparent power of 50 VA, Class E insulation and 15% voltage regulation, the WV50P7S8 is suited to appropriately rated industrial control applications. Its compact dimensions of 75 × 65 × 88 mm and weight of just 1 kg make it practical for installation in space-conscious control panels. Compatible enclosure references are EPH 1 or EPN 1.
Key Advantages
- 50 VA rated capacity for compatible industrial control and automation circuits.
- Wide primary voltage selection covering 380, 400, 420, 440, 460 and 480 V AC.
- Dual secondary windings provide flexible series and parallel connection options.
- 110 V or 120 V AC parallel output for compatible control equipment.
- 220 V or 240 V AC series output for higher-voltage control circuits.
- Class E insulation for dependable electrical insulation performance.
- Compact 75 × 65 × 88 mm dimensions help conserve panel space.
- Lightweight 1 kg construction simplifies handling and installation.
- Provides electrical isolation between primary and secondary circuits.
- EPH 1 or EPN 1 enclosure references offer protective housing options.
Key Features
- ETE WV wide-input-voltage control transformer series.
- 50 VA rated apparent power.
- Single-phase transformer configuration.
- Primary terminals: 0/380/400/420/440/460/480 V.
- Selectable primary voltages: 380, 400, 420, 440, 460 and 480 V AC.
- Secondary terminals: 0/110/120 V + 0/110/120 V.
- Secondary configuration: Two configurable secondary windings.
- Parallel secondary output: 110 V or 120 V AC.
- Series secondary output: 220 V or 240 V AC.
- Voltage regulation: 15%.
- Insulation class: E.
- Compact dimensions: 75 × 65 × 88 mm.
- Weight: 1 kg.
- Enclosure references: EPH 1 or EPN 1.
The ETE WV50P7S8 is designed for industrial control applications where the available primary supply voltage may vary between installations. Its six selectable primary voltage taps allow the transformer to be configured for 380, 400, 420, 440, 460 or 480 V AC supplies, providing greater flexibility than a transformer with a single fixed primary voltage.
The transformer incorporates two secondary windings, each with 0/110/120 V terminals. By connecting matching secondary winding taps in parallel, a 110 V or 120 V AC output can be obtained. Connecting the windings in series allows a 220 V or 240 V AC output. Correct winding polarity and terminal selection are essential, and connections must follow the manufacturer's wiring instructions.
At its 50 VA rating, the theoretical full-load secondary current is approximately 0.45 A at 110 V, 0.42 A at 120 V, 0.23 A at 220 V or 0.21 A at 240 V, assuming the full transformer rating is available at the selected connection. Actual permissible loading must comply with ETE's winding and terminal ratings.
The specified 15% voltage regulation means secondary voltage variation under different load conditions should be considered when selecting connected equipment. Sensitive devices requiring tightly regulated supplies may need additional voltage regulation. Appropriate circuit protection, conductor sizing and enclosure selection should be provided for safe operation.
Typical Applications
- Industrial electrical control panels and automation cabinets.
- Control circuits supplied from 380–480 V AC industrial systems.
- 110 V and 120 V AC relay and contactor control circuits.
- 220 V and 240 V AC control circuits requiring a compatible isolated supply.
- OEM machinery designed for multiple international supply voltages.
- Industrial signalling and monitoring equipment.
- Manufacturing machinery and production equipment.
- Compact electrical control assemblies with limited installation space.
- Replacement of compatible industrial control transformers.
