ETE MV100P2S2 Multi-Voltage Control Transformer 100VA 20/0/380/420V to 10/0/220/240V

Why Choose the ETE MV100P2S2 100 VA Multi-Voltage Control Transformer?

The ETE MV100P2S2 is a compact, versatile 100 VA single-phase multi-voltage control transformer designed for industrial electrical control panels, OEM machinery and automation systems requiring flexible AC voltage connections. Part of the ETE MV multi-voltage stock control transformer range, it features 20/0/380/420 V primary terminals and 10/0/220/240 V secondary terminals, providing multiple connection possibilities for appropriately designed electrical circuits.

Unlike a conventional transformer with a single fixed primary and secondary voltage, the MV100P2S2 incorporates a multi-tapped primary and secondary arrangement. This makes it particularly useful for panel builders and machinery manufacturers working with industrial supply systems and control equipment that require different nominal AC voltages. The precise voltage obtained depends on the selected terminal connections and the applied primary supply.

The transformer has a rated apparent power of 100 VA, Class E insulation and 12% voltage regulation. Its compact dimensions of 85 × 70 × 93 mm and weight of 1.5 kg make it a practical option for electrical control cabinets where installation space is limited.

A distinguishing feature of the MV100P2S2 is its 10 V secondary adjustment tap. Because the secondary terminals are marked 10/0/220/240 V, the actual terminal combinations must be confirmed against the manufacturer's datasheet. ETE should be consulted to verify the correct terminal connections before installation, particularly when using the 10 V adjustment tap.

The model is listed with EPH 1 or EPN 1 enclosure references in the ETE Stock Control Transformer Range, March 2026. It is suited to applications where the electrical designer requires a compact multi-voltage transformer rather than a fixed-output alternative.

Key Advantages

• Multi-voltage flexibility: Primary and secondary terminal taps provide several potential AC voltage configurations.
• 100 VA apparent power rating: Suitable for appropriately sized industrial control and auxiliary circuits.
• Multi-tapped primary: Features a 20/0/380/420 V terminal arrangement.
• Multi-tapped secondary: Features a 10/0/220/240 V terminal arrangement.
• Secondary adjustment facility: Includes a 10 V adjustment tap, subject to confirmation of the correct connections with ETE.
• Industrial control applications: Designed for use in compatible electrical panels and machinery control systems.
• Class E insulation: Provides the specified insulation classification.
• 12% voltage regulation: Gives engineers a defined characteristic to consider when selecting connected equipment.
• Compact construction: Measures just 85 × 70 × 93 mm.
• Low installation weight: Weighs 1.5 kg.
• Enclosure compatibility references: EPH 1 or EPN 1.
• Stock range availability: Listed in the ETE stock control transformer range.
• Reduced need for separate fixed-voltage models: Multi-tap arrangements can provide flexibility across suitably designed installations.

Key Features

• ETE MV multi-voltage control transformer series.
• 100 VA rated apparent power.
• Single-phase transformer configuration.
• 20/0/380/420 V primary terminals.
• 10/0/220/240 V secondary terminals.
• Tapped secondary output per manufacturer datasheet.
• 10 V secondary adjustment tap, with connections to be confirmed with ETE.
• Class E insulation system.
• 12% specified voltage regulation.
• 50/60 Hz AC input frequency.
• Continuous-rated control transformer construction.
• IP20 touch-proof terminals.
• Class H varnish impregnation.
• Transformer core earth connection.
• DIN rail mounting option for suitable installations.
• 85 × 70 × 93 mm overall dimensions.
• 1.5 kg specified weight.
• EPH 1 or EPN 1 enclosure references.

Understanding the Multi-Voltage Primary and Tapped Secondary

The ETE MV100P2S2 differs from a standard single-voltage control transformer because it incorporates taps on both the primary and secondary windings. The primary terminals are identified as 20/0/380/420 V, while the secondary terminals are identified as 10/0/220/240 V. These markings are essential to correct installation and should be interpreted using the manufacturer's connection diagram.

The multi-voltage primary arrangement allows the transformer to be configured for compatible industrial AC supplies using the appropriate winding terminals. However, the terminal markings should not be treated as a list of independently selectable supply voltages without reference to the wiring diagram. The correct connection depends on the available supply voltage, intended operating configuration and manufacturer's instructions.

On the secondary side, the 10/0/220/240 V terminal arrangement provides a tapped output rather than a single fixed-voltage connection. The 10 V adjustment tap is particularly important because the voltage available between individual terminal combinations cannot be safely assumed from the terminal labels alone. Confirm the exact terminal connections with ETE before energising the transformer.

This arrangement is useful where a machinery manufacturer or panel builder requires flexibility in selecting the appropriate control circuit voltage. The transformer can form part of an industrial control power system, provided the selected connection is confirmed and the connected equipment is compatible with the resulting voltage.

100 VA Transformer Output Current and Load Selection

The MV100P2S2 has a rated apparent power of 100 VA. The current available to a connected load depends on the actual secondary voltage selected. For example, dividing 100 VA by 240 V gives a calculated current of approximately 0.42 A, while dividing 100 VA by 220 V gives approximately 0.45 A.

These are calculated values for the stated nominal voltages, not confirmation of the correct terminal connections or a separate manufacturer-published current rating for every possible tap arrangement. The actual usable configuration and applicable load limits must be verified against the ETE datasheet.

When sizing the transformer, the combined apparent power of connected devices should be considered alongside operating voltage tolerance, starting characteristics and short-duration inrush demands. Electromagnetic contactors, relays and similar equipment may require additional consideration because their energisation demand can differ from their normal operating demand.

The specified 12% voltage regulation is another important design consideration. It describes the transformer's voltage regulation characteristic, meaning the actual secondary voltage may vary between no-load and rated-load operation. Equipment with narrow voltage tolerances should therefore be assessed carefully before connection.

Typical Applications

• Industrial electrical control panels requiring a multi-voltage control transformer.
• OEM machinery with configurable AC control supply requirements.
• Electrical panel-building projects using tapped transformer connections.
• Industrial automation and process control equipment.
• AC relay and contactor control circuits with compatible voltage requirements.
• Machine control cabinets where different supply arrangements must be accommodated.
• Industrial switching and auxiliary electrical circuits.
• Packaging, manufacturing and processing machinery.
• Electrical control assemblies requiring a tapped secondary voltage.
• Replacement installations requiring a compatible 100 VA MV-series transformer.
• Control systems where the specified secondary adjustment tap is required and its connection has been verified.
• Compact industrial panels where transformer dimensions and weight are important.

Installation and Terminal Connection Considerations

The MV100P2S2 should be installed by a suitably qualified person familiar with industrial transformer wiring and electrical control circuits. Before installation, verify the available primary supply, required secondary output, total connected load and intended terminal arrangement.

Important: The 20/0/380/420 V primary terminals and 10/0/220/240 V secondary terminals must be connected according to the ETE wiring diagram. The 10 V adjustment tap requires confirmation with ETE; it should not be connected based solely on an assumed voltage relationship.

Appropriate primary and secondary circuit protection, protective earthing, conductor sizing, ventilation and mechanical mounting should be incorporated into the installation design. The specified EPH 1 or EPN 1 enclosure references should be checked for suitability where an enclosed transformer arrangement is required.