SMone
SMone SM-CT20-100-5-05 Current Transformer 100/5 A Class 0.5 Ø 20 mm
SMone SM-CT20-100-5-05 Current Transformer 100/5 A Class 0.5 Ø 20 mm
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Businesses and non-Italian private customers: purchase with 22% VAT. The 10% rate is reserved for private customers resident in Italy — find out more.
Foreign companies entitled to 0% VAT: please write to info@litio.store.
Delivery in 10-20 daysMetering & sensorsAC sideSMone
SMone SM-CT20-100-5-05 Current Transformer 100/5 A Class 0.5 Ø 20 mm
The SMone SM-CT20-100-5-05 is a single-phase feed-through current transformer (CT) of the SM-CK20 series with a 100/5 A ratio. It reduces the line current to a 5 A secondary signal for energy meters, power analysers, cos φ controllers and static SVG compensators, making it possible to measure on circuits that exceed the direct range of the instruments.
Installation takes place in the electrical panel by passing the phase cable or the busbar through the Ø 20 mm window, without interrupting the power circuit; the secondary is terminated on screw terminals shielded against direct contact. The class 0.5 guarantees the accuracy required by power factor correction and consumption monitoring systems, while the FS 5 safety factor protects the downstream measuring device.
Key features
100/5 A ratioSuitable for lines up to 100 A, it provides the standardised 5 A output required by panel measuring instruments.
0.5 accuracy classAccuracy suitable for internal energy accounting and for power factor control.
20 mm feed-through windowThe conductor or the busbar passes through the core without cutting the circuit; DIN clip available as an accessory.
Rated power 1.5 VAPerformance sufficient to supply meters, analysers and SVG controller inputs with short wiring runs.
FS 5 safety factorIn the event of an overcurrent, core saturation limits the secondary, protecting the connected instruments.
IEC 61869-2 compliantMade in accordance with the IEC 60044-1 / IEC 61869-2 standards, with an insulation test at 3 kV for 1 minute.
Technical specifications
| Feature | Value |
|---|---|
| Product code | 116051 |
| Model | SM-CT20-100-5-05 (SM-CK20 series) |
| Type | Single-phase through-hole current transformer |
| Phases | 1 (single-phase) |
| Rated primary current | 100 A |
| Rated secondary current | 5 A |
| Transformation ratio | 100/5 A |
| Measurement type | Indirect, with current transformer |
| Accuracy class | 0.5 |
| Rated secondary power | 1,5 VA |
| Safety factor | FS 5 |
| Window diameter | 20 mm |
| Test voltage | 3 kV for 1 minute |
| Rated frequency | 50 / 60 Hz |
| Short-time thermal current | Ith = 60 × In |
| Continuous thermal current | 1,2 × In |
| Secondary connection | Screw terminals with touch protection |
| Mounting | Through-hole on cable or busbar; optional DIN rail clip |
| Operating temperature | -25 °C ... +85 °C |
| Standards | IEC 60044-1, IEC 61869-2, EN 61869-2, VDE 0414-1 |
| Dimensions | 44 × 65.5 × 31.5 mm |
| Weight | 0.2 kg |
Installation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.