Why Choose the ETE MV400P2S2 400 VA Multi-Voltage Control Transformer?
The ETE MV400P2S2 is a 400 VA single-phase multi-voltage control transformer designed for industrial electrical control panels, machinery and automation systems requiring a lower-voltage AC control supply. Part of the ETE MV Multi-Voltage Series, it features 20/0/380/420 V primary terminals and 10/0/220/240 V secondary terminals, providing a flexible tapped voltage arrangement for industrial control applications.
The transformer is suitable for electrical systems using the manufacturer's specified primary voltage connections, with secondary terminals marked for nominal 220 V and 240 V AC control supplies. Its tapped winding configuration allows electrical panel builders and equipment manufacturers to accommodate different voltage requirements, subject to the approved ETE connection diagram.
With a 400 VA rated apparent power, Class E insulation and 8% voltage regulation, the MV400P2S2 is suitable for appropriately rated industrial control circuits. It measures 120 × 108 × 120 mm, weighs 5.5 kg and has specified enclosure references of EPH 3 or EPN 2.
Important connection note: The secondary terminal arrangement incorporates a 10 V adjustment tap. The exact terminal connections and adjustment method must be confirmed with ETE before installation or energisation.
Key Advantages
- 400 VA rated capacity: Provides apparent power for appropriately sized industrial control, switching and signalling circuits.
- Multi-voltage primary: Features 20/0/380/420 V terminals for manufacturer-specified industrial AC supply connections.
- Tapped secondary output: Features 10/0/220/240 V terminals for flexible control voltage arrangements.
- 220 V and 240 V secondary options: Supports compatible industrial control equipment operating at these nominal voltages.
- 10 V adjustment tap: Provides an additional winding connection feature, subject to manufacturer confirmation.
- 8% voltage regulation: Provides a specified regulation characteristic for control circuit design.
- Class E insulation: Offers a defined insulation classification for transformer operation.
- Flexible panel design: Multiple voltage terminals support different electrical equipment requirements.
- Compact industrial construction: Measures 120 × 108 × 120 mm for integration into electrical cabinets.
- Defined product weight: Weighs 5.5 kg for mounting and mechanical support calculations.
- Enclosure options: Specified references EPH 3 or EPN 2.
Key Features
- ETE MV Multi-Voltage Series industrial control transformer.
- 400 VA rated apparent power.
- Single-phase transformer configuration.
- 20/0/380/420 V primary terminal arrangement.
- 380 V and 420 V primary terminal markings.
- 10/0/220/240 V secondary terminal arrangement.
- 220 V and 240 V secondary terminal markings.
- Tapped output connections according to the manufacturer's datasheet.
- 10 V adjustment tap requiring connection confirmation with ETE.
- Class E insulation.
- 8% specified voltage regulation.
- 120 mm length.
- 108 mm width.
- 120 mm height.
- 5.5 kg product weight.
- EPH 3 or EPN 2 enclosure references.
- Listed in the ETE Stock Control Transformer Range, March 2026.
Multi-Voltage Primary Connections for Industrial AC Supplies
The ETE MV400P2S2 incorporates a 20/0/380/420 V primary terminal arrangement, providing connection flexibility for industrial control systems using the manufacturer's specified supply configurations.
The terminals marked 380 V and 420 V support corresponding nominal industrial AC supply arrangements when wired according to the approved ETE connection diagram. The additional 20 V primary terminal forms part of the winding arrangement and must not be interpreted independently of the manufacturer's instructions.
This multi-voltage design is useful for electrical panel builders and OEM machinery manufacturers working with equipment requiring different primary voltage connections.
Installation requirement: Verify the available supply voltage, selected primary terminals and corresponding secondary output arrangement before energising the transformer. Incorrect connections can result in unintended secondary voltages or equipment damage.
Tapped 220 V and 240 V AC Secondary Output
The MV400P2S2 features 10/0/220/240 V secondary terminals, providing a tapped secondary arrangement for industrial control circuits.
The manufacturer's specification identifies the output connection as tapped output per datasheet. Consequently, the exact terminal combinations required for each nominal secondary voltage must be established using ETE's approved wiring documentation.
220 V AC Secondary Connection
For a nominal 220 V AC output, the transformer's 400 VA rating corresponds to a calculated secondary current of approximately 1.82 A, assuming the full apparent power rating is available at the selected output connection.
This voltage is suitable for compatible industrial control devices, including appropriately rated contactors, relays and machinery switching circuits.
240 V AC Secondary Connection
For a nominal 240 V AC output, the 400 VA rating corresponds to a calculated secondary current of approximately 1.67 A, assuming the full rating applies to that connection.
Electrical designers should verify the permitted terminal arrangement, connected load and voltage tolerances of the control equipment before commissioning.
10 V Adjustment Tap
The additional 10 V secondary terminal provides an adjustment feature within the transformer's tapped winding arrangement.
Manufacturer confirmation required: Confirm the exact 10 V adjustment tap connections with ETE. The terminal markings alone do not establish how the adjustment terminal should be combined with the other winding connections, and an unverified connection method must not be assumed.
8% Voltage Regulation and Control Circuit Design
The MV400P2S2 has a specified 8% voltage regulation characteristic. Voltage regulation describes the change in secondary voltage as the electrical load varies under the relevant operating conditions.
This characteristic should be considered when selecting voltage-sensitive control equipment, particularly contactors, relays and switching devices that may impose short-duration inrush loads.
The 400 VA rating represents the transformer's rated apparent power. It does not independently establish the permissible loading of every individual tap or winding section. The manufacturer's connection and loading requirements should be followed.
Compact Construction and Installation Considerations
The ETE MV400P2S2 measures 120 mm in length, 108 mm in width and 120 mm in height, with a specified weight of 5.5 kg. These dimensions help electrical panel builders assess available cabinet space and mounting support requirements.
The transformer has Class E insulation, and ETE specifies EPH 3 or EPN 2 as the corresponding enclosure references. The final enclosure and mounting arrangement should provide appropriate mechanical support, ventilation and environmental protection.
Suitable primary and secondary circuit protection, conductor sizing, protective earthing and terminal connections should be incorporated into the electrical installation. All winding connections must be verified using the manufacturer's approved diagram.
Typical Applications
- Industrial electrical control panels.
- Machinery control circuits requiring nominal 220 V AC or 240 V AC control supplies.
- Industrial contactor and relay control systems.
- Motor starter and motor control assemblies.
- Factory automation and manufacturing machinery.
- OEM machinery and electrical equipment manufacturing.
- Industrial switching and signalling systems.
- Electrical control voltage adaptation from higher-voltage AC supplies.
- Control cabinet assembly and electrical panel building.
- Machinery refurbishment and replacement transformer installations.
- Industrial electrical maintenance and system integration.
- Applications requiring a 400 VA single-phase multi-voltage control transformer.
