Carlo Gavazzi CTG210 core balance transformer with a 210 mm internal diameter and 1000/1 ratio designed for earth leakage current detection applications.
£314.01
The Carlo Gavazzi CTG210 is a high-sensitivity core balance transformer designed for reliable earth leakage current detection in industrial electrical systems. As part of the Carlo Gavazzi CTG series, it detects differences in current flow through conductors passing through the transformer core and provides a secondary signal for use with compatible residual current monitoring relays.
The CTG210 features a large 210 mm internal diameter, making it suitable for installations requiring increased clearance for larger cables or multiple conductors. It is designed for panel mounting within electrical distribution boards, industrial switchgear and control systems where dependable earth leakage monitoring is required.
With a 1000/1 current transformer ratio, a 400 A nominal current rating and support for systems up to 720 V AC, the CTG210 provides reliable residual current detection for applications including motors, pumps and electrical equipment installed in industrial environments.
Core balance transformers such as the Carlo Gavazzi CTG210 detect residual current by measuring the vectorial sum of current flowing through monitored conductors. When an imbalance occurs due to leakage current, the transformer generates a secondary signal that can be processed by a residual current monitoring relay to provide an alarm or protective disconnection.
The CTG series provides an effective solution for improving electrical safety in industrial installations, helping protect motors, pumps and equipment where insulation faults or leakage currents may create hazardous conditions.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | CTG |
| Model | CTG210 |
| Product type | Core balance transformer |
| Internal diameter | 210 mm |
| Transformer ratio | 1000/1 |
| Nominal current | 400 A |
| Overload current | 2400 A |
| Short-term thermal current | 50 × In |
| Dynamic current | 2.5 × Ith |
| Frequency range | 50–60 Hz |
| Maximum system voltage | 720 V AC |
| Rated insulation level | 3 kV AC |
| Protection rating | IP20 |
| Dimensions (W × H × D) | 290 × 304 × 33 mm |
| Weight | Approx. 1860 g |
| Mounting | Panel mounting with fixing flange |
| Secondary connection | Screw terminals 2 × 2.5 mm² |
| Operating temperature | -5 to +50 °C |
| Standards | IEC 61869-2 |
The CTG210 is a core balance transformer used to detect earth leakage currents by monitoring current imbalance in electrical conductors.
The Carlo Gavazzi CTG210 has a 210 mm internal diameter for routing larger monitored conductors through the transformer.
The CTG210 has a 1000/1 transformer ratio for residual current monitoring applications.
The CTG210 is designed for use with compatible Carlo Gavazzi earth leakage monitoring relays including the DEA71 and DEB71 series.
Yes, the CTG210 can be used on both single-phase and three-phase mains systems.
Carlo Gavazzi CTG core balance transformers are widely used by electrical engineers and automation professionals to improve system safety through reliable earth leakage detection and residual current monitoring.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...