Why Choose the ETE WV500P7S7 500 VA Wide-Input-Voltage Control Transformer?
The ETE WV500P7S7 is a versatile 500 VA single-phase wide-input-voltage control transformer designed for industrial electrical control panels, machinery, switchgear and automation systems. Part of the ETE WV wide-input-voltage control transformer range, it combines multiple primary voltage taps with configurable dual secondary windings, providing flexible AC voltage conversion for industrial installations operating with different supply voltages.
The WV500P7S7 features a 0/380/400/420/440/460/480 V primary terminal arrangement, supporting compatible 380, 400, 420, 440, 460 and 480 V AC supplies. Its two 0/24 V secondary windings can be connected in parallel for 24 V AC or in series for 48 V AC, making it suitable for different industrial control voltage requirements.
With a rated apparent power of 500 VA, Class E insulation and 8% voltage regulation, the WV500P7S7 provides a practical solution for appropriately rated industrial control circuits. Its dimensions of 120 × 120 × 120 mm and weight of 6.2 kg make it suitable for installation in electrical control cabinets with appropriate mounting arrangements. The specified enclosure references are EPH 3 or EPN 2.
Key Advantages
- 500 VA rated capacity for industrial control, signalling and automation applications.
- Wide primary voltage selection covering 380, 400, 420, 440, 460 and 480 V AC.
- Dual 24 V secondary windings provide flexible series and parallel output configurations.
- 24 V AC parallel output for compatible relays, contactors and industrial control devices.
- 48 V AC series output for equipment requiring a higher control voltage.
- 8% voltage regulation provides a defined secondary voltage regulation characteristic.
- Class E insulation provides a specified thermal insulation classification.
- Compact 120 × 120 × 120 mm dimensions help conserve electrical panel space.
- Single-phase construction suitable for industrial machinery and electrical control assemblies.
- EPH 3 or EPN 2 enclosure references assist with selecting suitable protective housing.
Key Features
- ETE WV wide-input-voltage control transformer series.
- 500 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: 0/24 V + 0/24 V.
- Secondary winding arrangement: Dual windings configurable in series or parallel.
- Parallel secondary output: 24 V AC.
- Series secondary output: 48 V AC.
- Voltage regulation: 8%.
- Insulation class: E.
- Dimensions: 120 × 120 × 120 mm.
- Weight: 6.2 kg.
- Enclosure references: EPH 3 or EPN 2.
The ETE WV500P7S7 is designed for industrial control installations where the available primary supply voltage may differ between machines, facilities or electrical systems. Its selectable primary terminals support 380, 400, 420, 440, 460 and 480 V AC, allowing the transformer to be configured for several compatible industrial supply voltages.
The transformer incorporates two 0/24 V secondary windings. When connected in parallel with matching voltage and correct winding polarity, the windings provide a 24 V AC output. When connected in series with the correct additive polarity, they provide a 48 V AC output. This arrangement allows the transformer to support different control circuit voltages without requiring separate transformer models.
Based on its 500 VA rating, the theoretical full-load secondary current is approximately 20.83 A at 24 V AC in the parallel configuration or 10.42 A at 48 V AC in the series configuration. These values assume the full rated apparent power is available in the selected connection arrangement. Actual permissible winding currents and loading requirements must follow ETE's specifications.
The specified 8% voltage regulation means secondary voltage variation between operating load conditions should be considered when selecting connected equipment. Sensitive devices requiring tightly regulated power may need additional voltage regulation. Correct primary tap selection, secondary winding polarity, suitable circuit protection and appropriate conductor sizing are essential for safe installation.
Typical Applications
- Industrial electrical control panels and automation cabinets.
- 24 V AC relay and contactor control circuits.
- 48 V AC industrial control and signalling systems.
- Machinery supplied from compatible 380–480 V AC industrial electrical systems.
- OEM equipment intended for multiple international supply voltages.
- Industrial process control and monitoring installations.
- Motor control centres and machinery control cabinets.
- AC control power supplies for compatible industrial automation equipment.
- Electrical assemblies requiring selectable 24 V or 48 V AC control power.
- Replacement of existing control transformers with matching electrical and mechanical specifications.
