Why Choose the ETE DV400P6S4 400 VA Dual-Input-Voltage Control Transformer?
The ETE DV400P6S4 is a robust 400 VA single-phase industrial control transformer designed to provide a nominal 110 V AC secondary output from either a 240 V AC or 415 V AC primary supply. Manufactured by Eastern Transformers & Equipment (ETE), this transformer belongs to the established DV dual-input-voltage control transformer series, developed for industrial electrical control panels, machinery and automation systems requiring flexible input voltage selection.
The DV400P6S4 features a tapped primary winding with 0/240/415 V terminals, allowing installers to select the appropriate connection for the available electrical supply. Its 0/110 V secondary terminals provide a dedicated 110 V AC output for compatible contactor coils, electromagnetic relays, solenoids, signalling devices and industrial control equipment. The dual-input arrangement is particularly useful for OEM machinery manufacturers and panel builders producing equipment for different industrial supply configurations.
With a rated apparent power of 400 VA, Class E insulation and 8% voltage regulation, the DV400P6S4 combines dependable voltage transformation with practical industrial construction. Measuring 120 × 108 × 120 mm and weighing 5.5 kg, it is suitable for integration into industrial electrical cabinets. The specified compatible enclosure references are ETE EPH 3 or EPN 2.
Key Advantages
- Dual primary voltage capability: Accepts either 240 V AC or 415 V AC through the appropriate primary terminal connections.
- Dedicated 110 V AC output: Supplies compatible industrial control components from a single secondary winding.
- 400 VA continuous-rated capacity: Suitable for industrial control circuits requiring a higher apparent power rating.
- Flexible primary connections: One transformer model accommodates two commonly used industrial input voltages.
- Class E insulation system: Provides an established insulation classification for industrial transformer applications.
- 8% voltage regulation: Offers a defined secondary voltage regulation characteristic for control circuit design.
- IP20 touch-proof terminals: Help reduce accidental contact with electrical terminal connections.
- Class H varnish impregnation: Supports robust transformer winding construction.
- Core earth connection: Provides a dedicated protective earthing point.
- 50/60 Hz compatibility: Suitable for the specified industrial AC supply frequencies.
- Contactor inrush selection guidance: The 400 VA transformer size has published selection figures of 900 VA at 95% secondary voltage and 1500 VA at 90% secondary voltage.
- Compact industrial construction: Measures 120 × 108 × 120 mm for installation in electrical control panels.
- Enclosure compatibility: Suitable for ETE EPH 3 or EPN 2 enclosure arrangements.
- Established UK-manufactured transformer range: Suitable for panel builders, machinery manufacturers and industrial maintenance applications.
Key Features
- ETE DV dual-input-voltage control transformer series.
- 400 VA rated apparent power.
- Single-phase control circuit transformer.
- Selectable primary voltage: 240 V AC or 415 V AC.
- Primary terminal arrangement: 0/240/415 V.
- Secondary terminal arrangement: 0/110 V.
- Nominal secondary output: 110 V AC.
- Rated frequency: 50/60 Hz.
- Calculated nominal full-load secondary current: Approximately 3.64 A.
- Continuous-rated control transformer construction.
- Class E insulation system.
- 8% voltage regulation.
- IP20 touch-proof electrical terminals.
- Class H varnish-impregnated construction.
- Core earth connection.
- Designed to EN 61558-1.
- Ambient operating temperature range: −10 to +35 °C.
- Contactor inrush selection figure at 95% secondary voltage: 900 VA.
- Contactor inrush selection figure at 90% secondary voltage: 1500 VA.
- Dimensions: 120 × 108 × 120 mm.
- Weight: 5.5 kg.
- Compatible enclosure references: EPH 3 or EPN 2.
Reliable 110 V AC Control Power with Dual Primary Voltage Flexibility
The ETE DV400P6S4 provides a practical solution for industrial installations requiring a dedicated 110 V AC control supply where the available primary voltage may be either 240 V AC or 415 V AC. Its dual-input-voltage arrangement enables the correct primary connection to be selected during installation, allowing one transformer model to accommodate different supply configurations without changing the nominal secondary voltage.
For a 240 V AC input, the transformer uses its designated 0/240 V primary terminals. For a 415 V AC input, the designated 0/415 V primary terminals are used. Both configurations provide a nominal 110 V AC secondary output. These primary connections are alternative voltage selections and must not be energised simultaneously from independent electrical supplies.
The 400 VA continuous apparent power rating corresponds to a calculated nominal full-load secondary current of approximately 3.64 A at 110 V AC. This capacity makes the transformer suitable for appropriately sized industrial control circuits containing compatible contactor coils, electromagnetic relays, solenoids and signalling equipment. The combined steady-state apparent power of connected devices should remain within the transformer rating, with additional consideration given to simultaneous energisation requirements.
For electromagnetic control applications, the published selection figures for the 400 VA transformer size are 900 VA at 95% secondary voltage and 1500 VA at 90% secondary voltage. These figures help electrical designers assess short-duration contactor energisation requirements while considering acceptable secondary voltage conditions. They do not increase the transformer's continuous output rating beyond 400 VA.
The specified 8% voltage regulation describes the variation in secondary voltage between no-load and rated-load conditions. This characteristic is important when designing control circuits containing voltage-sensitive equipment or loads that change during machinery operation. Correct consideration of voltage regulation, control coil operating tolerances and inrush requirements helps support dependable switching and control performance.
The DV400P6S4 incorporates Class E insulation, Class H varnish impregnation, IP20 touch-proof terminals and a protective core earth connection. Its continuous-rated construction is designed to EN 61558-1, with a specified ambient operating temperature range of −10 to +35 °C.
For installation within industrial control cabinets, the transformer measures 120 × 108 × 120 mm and has fixing centres of 90 × 90 mm with 5 mm fixing holes. The compatible EPH 3 or EPN 2 enclosure references provide options for installations requiring additional physical protection. Suitable primary and secondary circuit protection, conductor sizing, protective earthing and ventilation should be incorporated into the electrical design.
Although the transformer may be connected across two suitable phases of a three-phase electrical system where the phase-to-phase voltage is 415 V AC, the DV400P6S4 remains a single-phase transformer. Its 0/110 V secondary winding provides a nominal 110 V AC output and should not be confused with a centre-tapped 55/0/55 V arrangement used in certain construction-site applications.
Typical Applications
- Industrial electrical control panels requiring a 110 V AC supply.
- Machinery designed for either 240 V AC or 415 V AC primary supply configurations.
- OEM machinery and electrical control panel manufacturing.
- Contactor and electromagnetic relay control circuits.
- Motor starter panels and machinery control systems.
- Industrial solenoid valves and actuators rated for 110 V AC.
- Industrial signalling, indication and alarm circuits.
- Packaging machinery and conveyor control systems.
- Manufacturing and production line automation.
- Building services control equipment using compatible 110 V AC components.
- Industrial maintenance and electrical refurbishment projects.
- Replacement of compatible 400 VA dual-input-voltage control transformers.
