Why Choose the ETE WV100P7S7 100 VA Wide-Input-Voltage Control Transformer?
The ETE WV100P7S7 is a versatile 100 VA single-phase wide-input-voltage control transformer designed for industrial electrical control panels, machinery and automation systems. Part of the ETE WV wide-input-voltage transformer series, it combines multiple primary voltage taps with configurable dual secondary windings, providing a flexible solution for applications requiring 24 V or 48 V AC control power.
The WV100P7S7 features a 0/380/400/420/440/460/480 V primary terminal arrangement, allowing selection of compatible AC supply voltages from 380 V to 480 V. Its two independent 0/24 V secondary windings can be connected in parallel for 24 V AC or in series for 48 V AC, offering flexibility for different industrial control circuit requirements.
With a rated apparent power of 100 VA, Class E insulation and 12% voltage regulation, the transformer is suitable for appropriately rated industrial control applications. Its compact dimensions of 85 × 70 × 93 mm and weight of 1.5 kg make it practical for installation in electrical control cabinets. The specified enclosure references are EPH 1 or EPN 1.
Key Advantages
- 100 VA rated capacity for industrial control, signalling and automation circuits.
- Wide primary voltage selection covering 380, 400, 420, 440, 460 and 480 V AC.
- Dual 24 V secondary windings provide flexible output configurations.
- 24 V AC parallel output for compatible relays, contactors and control devices.
- 48 V AC series output for equipment requiring a higher control voltage.
- Class E insulation provides a defined thermal insulation classification.
- Compact 85 × 70 × 93 mm dimensions help conserve electrical panel space.
- Lightweight 1.5 kg construction supports straightforward handling and installation.
- Provides electrical isolation between primary and secondary circuits.
- EPH 1 or EPN 1 enclosure references support selection of suitable protective housing.
Key Features
- ETE WV wide-input-voltage control transformer series.
- 100 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: 12%.
- Insulation class: E.
- Dimensions: 85 × 70 × 93 mm.
- Weight: 1.5 kg.
- Enclosure references: EPH 1 or EPN 1.
The ETE WV100P7S7 is designed for industrial control installations where the available primary supply may differ between machines, sites or electrical systems. Its selectable primary terminals support 380, 400, 420, 440, 460 and 480 V AC, allowing the same transformer model to be configured for several compatible industrial supply voltages.
The transformer incorporates two 0/24 V secondary windings. When connected in parallel with matching polarity, the windings provide a 24 V AC output. When connected in series with the correct winding 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 the 100 VA rating, the theoretical full-load output current is approximately 4.17 A at 24 V AC in the parallel configuration or 2.08 A at 48 V AC in the series configuration. These values assume the full rated apparent power is available in the selected configuration. Actual permissible winding currents and connection requirements must follow ETE's specifications.
The specified 12% voltage regulation means secondary voltage variation between operating load conditions should be considered when selecting connected equipment. Devices requiring tightly regulated power may need additional regulation. Correct primary tap selection, secondary winding polarity, appropriate circuit protection and suitable 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 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.
- Low-voltage AC control power supplies for compatible industrial devices.
- Compact electrical assemblies requiring selectable control voltages.
- Replacement of existing control transformers with matching electrical specifications.
