Why Choose the ETE MV100P1S1 100 VA Multi-Voltage Control Transformer?
The ETE MV100P1S1 is a compact, versatile 100 VA single-phase multi-voltage control transformer designed for industrial electrical control panels, machinery and automation equipment requiring selectable AC control voltages. Manufactured by Eastern Transformers & Equipment (ETE), this transformer belongs to the established ETE MV multi-voltage transformer series, offering flexible primary connections and a tapped secondary winding for applications requiring 55 V AC or 110 V AC.
The MV100P1S1 features a 10/0/220/240 V primary terminal arrangement and a 0/55/110 V secondary terminal arrangement. The secondary winding provides nominal 55 V and 110 V output connection options, making the transformer suitable for compatible control relays, contactors, signalling devices and other industrial electrical equipment. The manufacturer also identifies the secondary configuration as 55/0/55 V (0/55/110 V), allowing consideration of a centre-tapped 110 V arrangement where the correct terminal configuration is confirmed.
A distinguishing feature of this model is its 10 V primary adjustment tap, which provides additional connection flexibility beyond the conventional 220 V and 240 V primary terminals. Because the exact relationship of this adjustment tap to the other primary connections must be established from the manufacturer's connection diagram, the correct wiring arrangement should be confirmed with ETE before installation.
With a rated apparent power of 100 VA, Class E insulation and 12% voltage regulation, the MV100P1S1 offers practical control voltage transformation in a compact format. Measuring just 85 × 70 × 93 mm and weighing 1.5 kg, it is particularly suitable for smaller control cabinets. Compatible enclosure references are ETE EPH 1 or EPN 1, and the manufacturer identifies a DIN rail mounting option for this transformer size.
Key Advantages
- Multi-voltage primary arrangement: Incorporates 10/0/220/240 V primary terminals for flexible supply connection options.
- Selectable secondary voltage: Provides nominal 55 V AC or 110 V AC output connections.
- 100 VA rated capacity: Suitable for appropriately sized industrial control circuits.
- Primary adjustment provision: Includes a 10 V adjustment tap, with connections to be confirmed against ETE's instructions.
- Centre-tapped secondary capability: Manufacturer identifies a 55/0/55 V secondary arrangement, subject to correct terminal connections.
- Class E insulation system: Provides an established insulation classification for industrial control transformers.
- 12% voltage regulation: Provides a defined regulation characteristic for assessing secondary voltage variation.
- Continuous-rated construction: Designed for sustained control circuit operation within its rated capacity.
- IP20 touch-proof terminals: Help reduce the risk of accidental contact with electrical connections.
- Class H varnish impregnation: Supports durable transformer winding construction.
- Core earth connection: Provides a protective earthing point.
- 50/60 Hz operation: Suitable for the specified AC supply frequencies.
- Compact dimensions: Measures 85 × 70 × 93 mm for space-conscious panel installations.
- DIN rail mounting option: Provides additional flexibility for control cabinet assembly.
- Enclosure compatibility: Suitable for ETE EPH 1 or EPN 1 enclosure arrangements.
- UK-manufactured product: Part of ETE's established stock control transformer range.
Key Features
- ETE MV multi-voltage control transformer series.
- 100 VA rated apparent power.
- Single-phase transformer construction.
- Primary terminals: 10/0/220/240 V.
- Nominal primary voltage connections: 220 V AC and 240 V AC, with additional 10 V adjustment provision.
- Primary adjustment tap: 10 V; confirm exact connection arrangement with ETE.
- Secondary terminals: 0/55/110 V.
- Secondary winding arrangement: 55/0/55 V (0/55/110 V).
- Nominal secondary output options: 55 V AC or 110 V AC.
- Rated frequency: 50/60 Hz.
- Calculated nominal full-load current at 110 V: Approximately 0.91 A.
- Calculated current equivalent at 55 V: Approximately 1.82 A, subject to winding and tap loading limits.
- Continuous-rated control transformer construction.
- Class E insulation system.
- 12% voltage regulation.
- IP20 touch-proof terminals.
- Class H varnish-impregnated construction.
- Core earth connection.
- Designed to EN 61558-1.
- Ambient operating temperature: −10 to +35 °C.
- DIN rail mounting option.
- Dimensions: 85 × 70 × 93 mm.
- Weight: 1.5 kg.
- Compatible enclosure references: EPH 1 or EPN 1.
Reliable Multi-Voltage Control Power for Industrial Applications
The ETE MV100P1S1 is designed for electrical installations requiring flexibility in both primary and secondary voltage connections. Its 10/0/220/240 V primary arrangement and 0/55/110 V secondary arrangement make it particularly useful where control circuits must accommodate different voltage requirements without using separate transformer models.
For conventional primary supply connections, the transformer provides nominal 220 V AC and 240 V AC input options. The additional 10 V primary adjustment tap offers further flexibility, but it must not be treated as an independent 10 V supply input. The exact winding relationship and permitted adjustment connections should be confirmed against ETE's engineering drawing or directly with the manufacturer before energisation.
On the secondary side, the transformer provides 55 V AC and 110 V AC connection options. ETE also describes this secondary arrangement as 55/0/55 V (0/55/110 V), identifying the potential for a centre-tapped 110 V output. The correct terminal references, centre-point connection and earthing arrangement must be confirmed for the intended application.
The 100 VA rated apparent power corresponds to a calculated nominal full-load current of approximately 0.91 A at 110 V AC. Dividing the same total apparent power by 55 V gives a theoretical current equivalent of approximately 1.82 A; however, the allowable current through an individual secondary section or tap depends on the winding arrangement. The full transformer rating must not automatically be assumed to be available from every individual tap.
The specified 12% voltage regulation describes the secondary voltage variation between no-load and rated-load conditions. This is particularly relevant when supplying electromagnetic control devices, which may draw considerably greater apparent power during initial energisation than during normal operation. Electrical designers should assess both continuous loading and simultaneous contactor or relay inrush requirements.
The MV100P1S1 features a Class E insulation system, Class H varnish impregnation, IP20 touch-proof terminals and a protective core earth connection. Its continuous-rated construction is designed to EN 61558-1 and is specified for operation at 50/60 Hz within an ambient temperature range of −10 to +35 °C.
With compact dimensions of 85 × 70 × 93 mm and a weight of 1.5 kg, the transformer is well suited to smaller electrical control panels. A DIN rail mounting option supports flexible cabinet assembly, while the specified EPH 1 or EPN 1 enclosure references provide additional installation options where protective housing is required.
Correct primary tap selection, secondary winding connections, protective earthing, circuit protection, conductor sizing and ventilation are essential. Where a centre-tapped 110 V supply is required, the installation must be designed and verified for that purpose rather than assuming that all 110 V transformer configurations provide identical protective characteristics.
Typical Applications
- Industrial electrical control panels requiring selectable 55 V AC or 110 V AC supplies.
- Machinery and automation equipment with 220 V AC or 240 V AC primary supply requirements.
- OEM machinery and electrical panel manufacturing.
- Contactor and electromagnetic relay control circuits.
- Motor starter and machine control panels.
- Industrial signalling and indication circuits.
- Compatible 55 V AC and 110 V AC solenoid or actuator circuits.
- Electrical control systems requiring a suitably configured centre-tapped 110 V supply.
- Packaging machinery and conveyor control systems.
- Manufacturing and production line automation.
- Industrial maintenance, replacement and refurbishment projects.
- Compact control cabinets requiring a DIN rail mounting option.
