Why Choose the ETE XMS250P4S4 250 VA Class II Enclosed Safety/Isolating Transformer?
The ETE XMS250P4S4 is a 250 VA single-phase Class II enclosed safety/isolating transformer designed to provide a nominal 110 V AC secondary supply from a 240 V AC primary input. Part of the ETE XMS transformer series, it combines Class II electrical construction, an integral moulded housing and chassis mounting for industrial control panels, electrical machinery and automation equipment.
Featuring 0/240 V primary terminals and 0/110 V secondary terminals, the XMS250P4S4 provides dedicated AC voltage transformation for compatible industrial control circuits. Its Class II construction incorporates protective insulation arrangements, while its safety/isolating transformer design provides electrical separation between the primary and secondary circuits. This makes it a practical choice for installations requiring an enclosed transformer with a defined 240 V to 110 V AC voltage configuration.
The XMS250P4S4 is designed for chassis mounting only, allowing secure installation on a suitable equipment mounting surface. With Class F insulation, dimensions of 126 × 136 × 127 mm and a weight of 4.6 kg, it provides electrical panel builders, OEM machinery manufacturers and maintenance engineers with a practical 250 VA industrial control power solution.
Key Advantages
- 250 VA rated capacity provides a dedicated AC supply for compatible industrial control equipment.
- 240 V AC primary input supports installations with a suitable nominal mains supply.
- 110 V AC secondary output is suitable for compatible industrial control, signalling and automation circuits.
- Class II electrical construction incorporates protective insulation arrangements for electrical safety.
- Safety/isolating transformer design provides electrical separation between the primary and secondary circuits.
- Integral moulded housing provides an enclosed transformer assembly without requiring a separate housing for the transformer itself.
- Chassis mounting allows the transformer to be secured to a suitable mounting surface within machinery or electrical equipment.
- Class F insulation provides a defined thermal insulation classification.
- 126 × 136 × 127 mm dimensions provide clear information for electrical panel space planning.
- 4.6 kg weight enables appropriate mechanical support and mounting arrangements to be specified.
- Dedicated 240 V to 110 V AC transformation simplifies transformer selection for compatible industrial control applications.
- Single-phase construction is suitable for dedicated industrial control power transformation.
Key Features
- ETE XMS Class II enclosed safety/isolating transformer series.
- 250 VA rated apparent power.
- 0.25 kVA transformer capacity.
- Single-phase transformer configuration.
- Class II electrical construction.
- Enclosed safety/isolating transformer design.
- Primary terminal configuration: 0/240 V.
- Nominal primary voltage: 240 V AC.
- Secondary terminal configuration: 0/110 V.
- Nominal secondary output: 110 V AC.
- Integral moulded housing.
- Chassis mounting only.
- Insulation class: F.
- Length: 126 mm.
- Width: 136 mm.
- Height: 127 mm.
- Weight: 4.6 kg.
- Suitable for appropriately designed industrial electrical installations requiring a nominal 110 V AC control supply from a 240 V AC source.
Reliable Class II 110 V AC Control Power for Industrial Automation
The ETE XMS250P4S4 provides a straightforward method of transforming a nominal 240 V AC primary supply into a 110 V AC secondary supply. Its 250 VA rated capacity makes it suitable for compatible industrial control equipment where the combined apparent power demand remains within the transformer's rating. Typical loads may include AC control relays, contactor coils, signalling devices and other electrical equipment designed for 110 V AC operation.
A key feature of the XMS250P4S4 is its Class II electrical construction. Class II equipment incorporates protective insulation arrangements designed to provide protection against electric shock without relying on a protective earth connection for its protective insulation system. The transformer's safety/isolating designation provides electrical separation between primary and secondary circuits, supporting appropriately engineered industrial control power installations. Class II electrical construction is distinct from the transformer's Class F thermal insulation rating.
The integral moulded housing provides an enclosed transformer format, while the specified chassis-only mounting arrangement allows the unit to be installed on a suitable equipment mounting surface. Unlike smaller XMS models that may offer DIN rail installation, the XMS250P4S4 must be chassis mounted. The mounting surface and fixings should be suitable for its 4.6 kg weight and the conditions of the installation.
At its rated capacity, the calculated nominal secondary current is approximately 2.27 A at 110 V AC. This figure is derived from the 250 VA rating and nominal output voltage rather than a separately verified manufacturer current rating. The calculated ideal primary current is approximately 1.04 A at 240 V AC, excluding transformer losses and magnetising current. Suitable circuit protection, conductor sizing, ventilation and electrical clearances remain essential for dependable operation.
Typical Applications
- 110 V AC industrial control circuits.
- Electrical control panels supplied from compatible 240 V AC systems.
- Industrial machinery requiring a dedicated 110 V AC control supply.
- Chassis-mounted machinery control equipment.
- Industrial automation and OEM machinery.
- Control relays and contactors with compatible 110 V AC coils.
- Industrial signalling and indication circuits.
- Motor control panels requiring a compatible 110 V AC supply.
- Machinery electrical cabinets and control enclosures.
- Electrical equipment requiring an appropriately specified isolating transformer.
- Electrical panel building and control system integration.
- Industrial process control equipment requiring a compatible 110 V AC supply.
- Replacement or upgrade projects requiring a compatible 250 VA, 240 V to 110 V AC chassis-mounted enclosed transformer.
