Why Choose the ETE MV300P2S1 300 VA Multi-Voltage Control Transformer?
The ETE MV300P2S1 is a 300 VA single-phase multi-voltage control transformer designed for industrial electrical panels, machinery control systems and automation equipment requiring a nominal 55 V AC or 110 V AC secondary supply. Manufactured by Eastern Transformers & Equipment (ETE), this model belongs to the MV Multi-Voltage Series and provides flexible primary and secondary voltage connections for industrial applications.
Featuring 20/0/380/420 V primary terminals and 0/55/110 V secondary terminals, the MV300P2S1 accommodates the manufacturer's specified primary supply configurations and offers selectable 55 V or 110 V output taps. The secondary winding also provides a centre-tapped arrangement suitable for appropriately designed industrial control circuits.
With a 300 VA rated capacity, Class E insulation and 8% voltage regulation, this transformer is suitable for appropriately sized industrial control loads. It measures 120 × 100 × 120 mm, weighs 4.7 kg and has specified enclosure references of EPH 3 or EPN 2.
Important: The primary terminal arrangement incorporates a 20 V adjustment tap. Confirm the exact adjustment tap connections with ETE before installation or energisation.
Key Advantages
- 300 VA rated output: Provides control power for appropriately rated industrial switching, signalling and automation equipment.
- Multi-voltage primary: Features 20/0/380/420 V terminals for manufacturer-specified industrial supply connections.
- Selectable secondary voltage: Offers nominal 55 V AC and 110 V AC output connections.
- Centre-tapped secondary: Supports applications requiring a 110 V AC winding with a 55 V centre tap.
- 20 V primary adjustment tap: Provides an additional primary connection feature, subject to ETE confirmation.
- 8% voltage regulation: Provides a defined regulation characteristic for control circuit design.
- Class E insulation: Suitable for the specified industrial transformer operating conditions.
- Continuous-rated operation: Designed for sustained control circuit applications within the manufacturer's operating limits.
- IP20 touch-proof terminals: Provide a degree of protection against accidental contact with terminal connections.
- Class H varnish impregnation: Supports durable transformer winding construction.
- Core earth connection: Facilitates appropriate protective earthing.
- Compact industrial construction: Measures 120 × 100 × 120 mm for electrical cabinet installation.
- Enclosure options: Specified references EPH 3 or EPN 2.
Key Features
- ETE MV Multi-Voltage Series control transformer.
- 300 VA rated apparent power.
- Single-phase electrical configuration.
- 20/0/380/420 V primary terminal arrangement.
- 20 V primary adjustment tap requiring manufacturer connection confirmation.
- 0/55/110 V secondary terminal arrangement.
- Nominal 55 V AC or 110 V AC secondary connections.
- Centre-tapped secondary winding configuration.
- 50/60 Hz operating frequency.
- Class E insulation.
- 8% voltage regulation.
- Continuous-rated industrial control circuit construction.
- IP20 touch-proof terminals.
- Class H varnish-impregnated windings.
- Protective core earth connection.
- Designed to EN 61558-1.
- Manufacturer-specified ambient temperature range of −10 to +35 °C.
- 120 × 100 × 120 mm dimensions.
- 4.7 kg weight.
- EPH 3 or EPN 2 enclosure references.
Multi-Voltage Primary Connections and 20 V Adjustment Tap
The ETE MV300P2S1 features a 20/0/380/420 V primary terminal arrangement intended for the manufacturer's specified industrial AC supply configurations. This makes it useful for electrical panel builders working with machinery and control systems designed around nominal 380 V or 420 V primary connections.
The primary winding also incorporates a 20 V adjustment tap. The precise relationship between the adjustment terminal and the other primary connections must be established using ETE's approved wiring diagram. The terminal markings alone should not be used to infer an unverified voltage correction method.
Installation requirement: Confirm the correct primary connections, including the 20 V adjustment tap, with ETE before energising the transformer. Incorrect connections may result in unintended secondary voltages, excessive winding excitation or equipment damage.
Selectable 55 V and 110 V AC Secondary Connections
The MV300P2S1 incorporates 0/55/110 V secondary terminals, allowing the installer to select a nominal 55 V AC or 110 V AC connection according to the required control circuit voltage.
110 V AC Secondary Output
Using the full 110 V secondary winding, the 300 VA rating corresponds to a calculated nominal output current of approximately 2.73 A. This configuration is suited to appropriately rated 110 V AC control circuits, including industrial contactors, relays and switching equipment.
55 V AC Secondary Tap
The intermediate secondary terminal provides a nominal 55 V AC connection. This can be useful for compatible low-voltage AC control equipment and centre-tapped control circuit arrangements.
Although dividing 300 VA by 55 V gives a theoretical current of approximately 5.45 A, this does not establish the permissible loading of the 55 V tap. The manufacturer must confirm the allowable half-winding current and any simultaneous loading restrictions before the circuit is designed.
The specified 8% voltage regulation should be considered when selecting voltage-sensitive devices, particularly where contactor inrush currents or changing control loads may affect the secondary voltage.
Industrial Construction and Installation Considerations
The ETE MV300P2S1 has dimensions of 120 mm length × 100 mm width × 120 mm height and weighs 4.7 kg. Its construction is intended for installation in appropriately designed electrical panels and machinery control cabinets.
The ETE MV range incorporates IP20 touch-proof terminals, Class H varnish impregnation and a protective core earth connection. The range is designed to EN 61558-1 for continuous-rated control circuit operation, with an ambient temperature range of −10 to +35 °C. The MV300P2S1 has Class E insulation.
For this 300 VA model, ETE specifies enclosure references EPH 3 or EPN 2. The installation should provide adequate mounting support, ventilation, appropriate primary and secondary circuit protection, conductor sizing and protective earthing.
Transformer selection should account for both steady-state load and any short-duration inrush requirements of connected control equipment. The manufacturer's terminal diagram must be followed for the primary adjustment tap and secondary voltage selection.
Typical Applications
- Industrial control panels requiring nominal 110 V AC control power.
- Machinery control circuits requiring a 55 V AC secondary tap.
- Industrial contactor and relay control systems.
- Motor starter and motor control assemblies.
- Factory automation and production machinery.
- OEM electrical equipment and machinery manufacturing.
- Electrical control cabinet assembly and panel building.
- Industrial switching and signalling circuits.
- Control voltage adaptation from higher-voltage AC supplies.
- Machinery refurbishment and replacement control transformer installations.
- Industrial electrical maintenance and system integration.
- Applications requiring a 300 VA single-phase multi-voltage transformer.
