ETE MV250P2S1 Multi-Voltage Control Transformer 250VA 20/0/380/420V to 0/55/110V

Why Choose the ETE MV250P2S1 250 VA Multi-Voltage Control Transformer?

The ETE MV250P2S1 is a versatile 250 VA single-phase multi-voltage control transformer designed for industrial electrical control panels, machinery and automation systems requiring selectable AC control voltages. Part of the ETE MV multi-voltage control transformer range, this model features 20/0/380/420 V primary terminals and 0/55/110 V secondary terminals, providing nominal 55 V AC or 110 V AC output connections for compatible industrial control equipment.

The MV250P2S1 offers flexibility for installations involving different industrial supply arrangements. Its primary winding includes terminals marked 380 V and 420 V, together with a 20 V primary adjustment tap. This adjustment connection provides additional flexibility when configuring the transformer, although the exact permitted terminal combinations must be confirmed with ETE before installation.

On the secondary side, the 0/55/110 V tapped winding allows installers to select the appropriate output connection for equipment requiring 55 V AC or 110 V AC. This makes the transformer suitable for appropriately rated contactor coils, electromagnetic relays, signalling devices, solenoids and other industrial AC control components.

With a rated apparent power of 250 VA, Class E insulation and 8% voltage regulation, the MV250P2S1 provides a practical combination of control power capacity and voltage selection. Measuring 120 × 88 × 120 mm and weighing 3.9 kg, it is suitable for integration into industrial electrical cabinets. The specified compatible enclosure references are ETE EPH 3 or EPN 2.

Key Advantages

• Multi-voltage primary arrangement: Features 20/0/380/420 V primary terminals for flexible industrial supply connections.
• Selectable secondary voltage: Provides nominal 55 V AC or 110 V AC output connections.
• 250 VA rated capacity: Suitable for industrial control circuits with appropriately calculated electrical loads.
• 20 V primary adjustment tap: Offers an additional winding connection, with the correct configuration to be confirmed with ETE.
• Tapped secondary winding: Accommodates different AC control voltage requirements within one transformer model.
• Class E insulation: Provides a defined insulation classification for industrial transformer applications.
• 8% voltage regulation: Provides a specified characteristic for assessing secondary voltage variation under load.
• Flexible control panel integration: Suitable for machinery and automation equipment using compatible AC control components.
• Compact industrial construction: Measures 120 × 88 × 120 mm for installation within electrical control cabinets.
• Practical installation weight: Weighs 3.9 kg.
• Compatible enclosure options: Specified for ETE EPH 3 or EPN 2 enclosure arrangements.
• Industrial application versatility: Suitable for compatible contactors, relays, signalling circuits and AC-operated actuators.
• Established ETE product range: Listed in the ETE stock control transformer range, March 2026.

Key Features

• ETE MV multi-voltage control transformer series.
• Manufacturer part number: MV250P2S1.
• Rated apparent power: 250 VA.
• Transformer configuration: Single-phase with tapped primary and secondary windings.
• Primary terminal arrangement: 20/0/380/420 V.
• Primary voltage terminal markings: 380 V and 420 V.
• Primary adjustment provision: 20 V tap; confirm connections with ETE.
• Secondary terminal arrangement: 0/55/110 V.
• Nominal secondary output options: 55 V AC or 110 V AC.
• Calculated nominal secondary current at 110 V: Approximately 2.27 A.
• Insulation class: E.
• Voltage regulation: 8%.
• Length: 120 mm.
• Width: 88 mm.
• Height: 120 mm.
• Weight: 3.9 kg.
• Compatible enclosure references: EPH 3 or EPN 2.

Reliable 55 V or 110 V AC Control Power for Industrial Machinery

The ETE MV250P2S1 provides a flexible solution for industrial electrical installations requiring selectable 55 V AC or 110 V AC control voltage. Its 20/0/380/420 V primary arrangement and 0/55/110 V secondary winding allow the transformer to be incorporated into electrical systems where the available supply and required control voltage must be matched correctly.

The primary winding includes terminals marked 380 V and 420 V, together with a 20 V adjustment tap. The adjustment tap must not be interpreted as a standalone 20 V supply input. Its precise function, permitted terminal combinations and suitability for a particular supply voltage should be confirmed using ETE's approved wiring information before energising the transformer.

The secondary winding incorporates an intermediate 55 V tap and a full 110 V connection. This provides a choice of nominal secondary voltages for compatible industrial control components. Although the terminal arrangement includes a midpoint tap, any centre-point earthing arrangement or application requiring a centre-tapped supply must be assessed against the manufacturer's connection information and the requirements of the electrical installation.

The 250 VA apparent power rating corresponds to a calculated nominal full-load secondary current of approximately 2.27 A at 110 V AC. This calculation is based on the total transformer apparent power divided by the nominal full secondary voltage. The allowable current through the individual 55 V winding section has not been separately specified and should not be assumed to equal the total transformer rating divided by 55 V.

The specified 8% voltage regulation is relevant when designing control circuits containing electromagnetic loads. Secondary voltage may vary as connected equipment switches on and off, particularly where contactors, relays or solenoids draw greater apparent power during initial energisation than during normal operation. Electrical designers should therefore assess both steady-state load and simultaneous switching requirements.

With Class E insulation, dimensions of 120 × 88 × 120 mm and a weight of 3.9 kg, the MV250P2S1 is suited to industrial electrical control cabinets. The specified EPH 3 or EPN 2 enclosure references provide compatible housing options where additional physical protection is required.

The MV250P2S1 provides AC voltage transformation rather than regulated DC output. Equipment requiring DC control voltage will need appropriate additional conversion equipment. Installation should include correct primary tap selection, suitable primary and secondary circuit protection, conductor sizing, mounting, ventilation and protective earthing where applicable.

Typical Applications

• Industrial electrical control panels requiring selectable 55 V AC or 110 V AC supplies.
• Machinery control systems using compatible industrial primary voltage connections.
• OEM machinery and electrical panel manufacturing.
• Contactor and electromagnetic relay control circuits.
• Motor starter panels and machine control systems.
• Industrial signalling and indication circuits.
• Compatible AC-operated solenoid valves and actuators.
• Automation equipment requiring transformer-derived AC control power.
• Packaging machinery and conveyor control systems.
• Industrial process control installations.
• Electrical maintenance and refurbishment projects.
• Replacement of compatible 250 VA multi-voltage control transformers.