NewTrend · 45mm circular residual current transformer
Product overview
NewTrend CT-45 is a circular through-core residual current transformer with a 45mm aperture and terminal connection. This 0-100A primary-circuit version has a 1A nominal residual-current input, a 0.5mA full-scale output and a 2000:1 transformation ratio. Pass the live and neutral circuit conductors through the transformer together, as marked on the original product.
Technical selection summary
| Model | CT-45 |
|---|---|
| Construction | Circular through-core residual current transformer |
| Through-core aperture | 45mm |
| Primary current | 0-100A |
| Nominal residual-current input | 1A |
| Full-scale output | 0.5mA at 1A residual input |
| Transformation ratio | 2000:1 |
| Rated continuous thermal current | 2A |
| Working frequency | 50-400Hz |
| Operating temperature | -12 to +45°C |
| Ambient humidity | Up to 85% |
| Connection | Terminal type |
| Shell / skeleton | ABS, flame-retardant grade 94-V0 / PBT |
| Core / encapsulation | Nickel steel or nanocrystalline core; epoxy resin casting |
Typical applications
- Residual-current monitoring with compatible leakage-monitoring devices
- Electrical-fire monitoring systems with the matching residual-current signal interface
View or download CT-45 residual current transformer technical datasheet (PDF)
Product reference images and drawings
Original complete mounting-base view
Pass live and neutral circuit conductors through the core together and match the signal ratio to the monitoring device. Installation and wiring must be performed by qualified electricians.
