Isolating Transformer, Three-Phase, Bench Mounted | SC-ITR 3050
The Isolating Transformer, Three-Phase, Bench Mounted – SC-ITR 3050 provides galvanic isolation between 3 x 400 V AC mains and low-voltage secondary outputs. It comprises three isolated single-phase transformers with secondary taps at 22 V, 110 V, 220 V and 244 V AC. A star-point terminal allows single- and three-phase use. The unit is rated 1.5 kVA continuous, protected by a 6 A primary MCB and 2.5 A secondary fuses. A printed schematic on the front panel shows the wiring and tap arrangement. It is an IEC 61558 safety isolating transformer for machines, rectifiers, control circuits and trainers.
The Isolating Transformer, Three-Phase, Bench Mounted – SC-ITR 3050 provides galvanic isolation between mains and low-voltage outputs. Built from three isolated single-phase transformers, it is ideal for machines, rectifier experiments, control circuits and machine trainers.
Product Overview
The Isolating Transformer, Three-Phase, Bench Mounted – SC-ITR 3050 gives galvanic isolation between the mains (L1–L2–L3) and low-voltage secondary outputs. It is built from three isolated single-phase transformers, with the wiring diagram shown on the front panel. The primary accepts 3 x 400 V AC at 50/60 Hz. Each secondary offers four taps: 22 V, 110 V, 220 V and 244 V AC on 4 mm safety sockets. A star-point terminal group on 4 mm sockets allows single- and three-phase use from any tap. The unit delivers 500 VA per secondary, 1.5 kVA total, in continuous S1 duty. Primary protection includes a 6 A C-curve MCB. Secondary fuses are 2.5 A per phase. The enclosure is IP20 with a front panel schematic and tap arrangement printed for reference.
Isolating Transformer, Three-Phase, Bench Mounted – SC-ITR 3050: Technical Specifications
| Category | Specification |
|---|---|
| Primary | 3 x 400 V AC, 50/60 Hz |
| Secondary Taps | 22 V, 110 V, 220 V, 244 V AC on 4 mm safety sockets; one per secondary |
| Neutral | Star-point terminal group on 4 mm sockets for single- and three-phase use |
| Power Rating | 500 VA per secondary; 1.5 kVA total; continuous S1 duty |
| Insulation | Safety isolating transformers to IEC 61558 |
| Primary Protection | MCB 6 A C-curve |
| Secondary Protection | 2.5 A fuses per phase; protective earth terminal |
| Enclosure | IP20; front panel with schematic and tap arrangement; educational trainer frame |
| Nameplate | IEC 61558 compliant; voltages, VA rating and serial number |
Key Features
- Galvanic Isolation: three isolated single-phase transformers
- Multiple Taps: 22 V, 110 V, 220 V, 244 V AC per secondary
- Flexible Configuration: star-point terminal for single- and three-phase use
- Safety Rating: IEC 61558 safety isolating transformer
- Primary Protection: 6 A C-curve MCB
- Secondary Protection: 2.5 A fuses per phase
- Panel Schematic: wiring diagram and tap arrangement printed on front
- Continuous Operation: 1.5 kVA total, S1 duty cycle
- Educational Design: trainer frame for classroom and lab use
Experiments
- Three-phase to single-phase power conversion using star-point terminal
- Voltage selection using secondary taps for different load requirements
- Testing galvanic isolation between primary and secondary
- Rectifier circuits at different secondary voltage levels
- Three-phase machine control circuit design
- Power measurement on isolated secondary circuits
- Phase angle and power factor measurement with isolated secondary
- Single-phase loads from three-phase primary using tap selection
Construction and Design
The Isolating Transformer, Three-Phase, Bench Mounted – SC-ITR 3050 consists of three isolated single-phase transformer units. The primary accepts 3 x 400 V AC at 50/60 Hz. Each secondary has four voltage taps on 4 mm safety sockets. A star-point terminal group allows flexible single- and three-phase use. The unit mounts in an IP20 enclosure with an educational trainer frame. The front panel displays a printed schematic and tap arrangement. A 6 A C-curve MCB protects the primary. Secondary fuses of 2.5 A per phase protect the outputs.
Scope of Delivery
- Isolating transformer panel
- English manual and wiring diagram
Q: What is galvanic isolation?
A: Galvanic isolation means there is no direct electrical connection between the primary and secondary windings. This protects users and circuits from high-voltage faults.
Q: Can I use this transformer for single-phase circuits?
A: Yes. The star-point terminal group allows you to use a single secondary tap as a single-phase supply, or combine outputs for three-phase loads.
Q: What secondary voltages are available?
A: Each secondary has four taps: 22 V, 110 V, 220 V and 244 V AC, all on 4 mm safety sockets.
Q: Is the transformer protected against overload?
A: Yes. The primary has a 6 A C-curve MCB. Secondary fuses of 2.5 A per phase protect the outputs.
Q: What is the total power capacity?
A: The transformer has a continuous rating of 1.5 kVA total, with 500 VA per secondary.
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