Why Choose the ETE MV200P3S3 200 VA Multi-Voltage Control Transformer?
The ETE MV200P3S3 is a versatile 200 VA single-phase multi-voltage control transformer designed for industrial control panels, electrical machinery and automation systems requiring flexible primary supply connections and selectable low-voltage AC outputs. Part of the ETE MV Multi-Voltage Series, this transformer features two 120 V primary windings and two 12 V secondary windings, allowing series or parallel connections to suit different electrical installations.
Its 0/120 V + 0/120 V primary terminals allow the transformer to operate from a nominal 120 V AC supply with parallel-connected primary windings or a 240 V AC supply with series-connected primary windings. The 0/12 V + 0/12 V secondary terminals provide a nominal 12 V AC output when connected in parallel or 24 V AC when connected in series.
With a 200 VA rated capacity, Class E insulation and 10% voltage regulation, the MV200P3S3 provides a practical control power solution for appropriately rated industrial equipment. Its compact dimensions of 96 × 87 × 103 mm and weight of 2.8 kg make it suitable for integration into electrical control cabinets. The specified enclosure references are EPH 2 or EPN 1.
Important installation note: Both primary and secondary windings must be connected with the correct polarity. Parallel connections require matching winding voltages and correct phasing, while series connections must use the manufacturer's specified winding arrangement. Always follow the ETE terminal identification and wiring diagram before energising the transformer.
Key Advantages
- Dual primary voltage capability: Supports nominal 120 V AC or 240 V AC primary operation through parallel or series winding connections.
- Selectable secondary output: Provides nominal 12 V AC or 24 V AC from two configurable secondary windings.
- 200 VA rated capacity: Suitable for appropriately sized industrial control and signalling circuits.
- Flexible electrical design: Combines two primary supply configurations and two secondary output configurations in one transformer.
- Dual 120 V primary windings: Allow adaptation to different nominal AC supply voltages.
- Dual 12 V secondary windings: Support 12 V parallel and 24 V series operation.
- Class E insulation: Provides a defined insulation classification for industrial transformer applications.
- 10% voltage regulation: Provides a specified regulation characteristic for control circuit design.
- Continuous-rated construction: Designed for industrial control circuit operation.
- IP20 touch-proof terminals: Help reduce accidental contact with electrical connections.
- Class H varnish impregnation: Supports durable winding construction.
- Protective core earth connection: Supports appropriate electrical earthing arrangements.
- Compact dimensions: Measures 96 × 87 × 103 mm for installation in electrical panels.
- Enclosure compatibility: Specified enclosure references EPH 2 or EPN 1.
Key Features
- ETE MV Multi-Voltage Series industrial control transformer.
- 200 VA rated apparent power.
- Single-phase transformer configuration.
- 0/120 V + 0/120 V primary terminal arrangement.
- Two separate 120 V AC primary windings.
- 120 V AC primary operation with correctly connected parallel windings.
- 240 V AC primary operation with correctly connected series windings.
- 0/12 V + 0/12 V secondary terminal arrangement.
- Two separate 12 V AC secondary windings.
- 12 V AC secondary output with correctly connected parallel windings.
- 24 V AC secondary output with correctly connected series-aiding windings.
- 50/60 Hz operating frequency.
- Class E insulation system.
- 10% specified voltage regulation.
- Continuous-rated industrial control transformer.
- IP20 touch-proof electrical terminals.
- Class H varnish-impregnated windings.
- Protective core earth connection.
- Designed to EN 61558-1.
- Specified ambient temperature range of −10 to +35 °C.
- 96 × 87 × 103 mm overall dimensions.
- 2.8 kg product weight.
- EPH 2 or EPN 1 enclosure references.
Dual 120 V Primary Windings for 120 V or 240 V AC Operation
The ETE MV200P3S3 incorporates two separate 0/120 V primary windings, allowing the transformer to accommodate either a nominal 120 V AC or 240 V AC supply. This dual-primary configuration is particularly useful for electrical panel builders and OEM equipment manufacturers producing control systems for different electrical supply arrangements.
120 V AC Parallel Primary Connection
For a nominal 120 V AC supply, the two primary windings are connected in parallel according to the manufacturer's approved wiring diagram. Both windings must be connected with matching polarity to prevent excessive circulating currents.
At a 200 VA apparent power level, the calculated supply current is approximately 1.67 A. This is an idealised value calculated from apparent power divided by voltage; actual input current will also depend on transformer losses and magnetising current.
240 V AC Series Primary Connection
For a nominal 240 V AC supply, the two 120 V primary windings are connected in series, allowing the supply voltage to be distributed across both windings. The series connection must follow the manufacturer's specified terminal arrangement.
At a 200 VA apparent power level, the calculated supply current is approximately 0.83 A, excluding losses and magnetising current.
Important: The primary winding connections must be configured correctly before energisation. Incorrect series or parallel connections may result in excessive current, incorrect secondary voltages or transformer damage.
Dual 12 V Secondary Windings for Selectable 12 V or 24 V AC Output
The MV200P3S3 features two separate 0/12 V secondary windings. These provide flexibility for industrial control circuits operating at either 12 V AC or 24 V AC, without requiring separate transformer models for each nominal output voltage.
12 V AC Parallel Secondary Connection
When the two 12 V secondary windings are connected correctly in parallel, the transformer provides a nominal 12 V AC output. Based on its 200 VA rating, the calculated full-load secondary current is approximately 16.67 A.
Parallel operation requires the windings to have matching voltages and the correct polarity. Incorrect connections can cause excessive circulating currents and damage. The manufacturer's connection diagram must be followed.
24 V AC Series Secondary Connection
When the two secondary windings are connected in the correct series-aiding arrangement, their voltages combine to provide a nominal 24 V AC output. At 200 VA, the calculated full-load secondary current is approximately 8.33 A.
This configuration is suitable for appropriately rated 24 V AC industrial control devices, including relays, contactors, actuators and signalling equipment.
Engineering consideration: The calculated secondary currents assume that the full 200 VA rating is available in the selected winding configuration. The permissible winding loading, conductor sizes, protective devices and terminal ratings should be checked against ETE's technical documentation before installation.
Compact Industrial Construction and Installation Considerations
With dimensions of 96 mm in length, 87 mm in width and 103 mm in height, the ETE MV200P3S3 offers a compact footprint for industrial electrical cabinets and machinery control panels. Its 2.8 kg weight should be considered when selecting mounting hardware and panel support arrangements.
The transformer features Class E insulation, Class H varnish impregnation, IP20 touch-proof terminals and a protective core earth connection. ETE's MV control transformer range is designed to EN 61558-1 for continuous-rated operation, with a specified ambient temperature range of −10 to +35 °C.
The specified enclosure references are EPH 2 or EPN 1. Suitable mechanical mounting, ventilation, electrical protection, conductor sizing and protective earthing should be incorporated into the complete installation.
When selecting the transformer, account for the total connected load, contactor or relay inrush requirements and the specified 10% voltage regulation. Ensure that both primary and secondary winding configurations are verified before commissioning.
Typical Applications
- Industrial control panels requiring 12 V AC or 24 V AC control power.
- Machinery operating from nominal 120 V AC or 240 V AC primary supplies.
- Industrial relay and contactor control circuits.
- 24 V AC actuators and compatible automation equipment.
- 12 V AC switching and signalling devices.
- Motor starter and motor control assemblies.
- Factory automation and production machinery.
- OEM machinery and electrical equipment manufacturing.
- Electrical control cabinet assembly and panel building.
- Industrial machinery refurbishment and maintenance.
- Applications requiring configurable dual primary and dual secondary windings.
- Electrical installations requiring a compact 200 VA single-phase control transformer.
