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CTG035 – CORE BALANCE TRANSFORMER 35 MM
Carlo Gavazzi CTG035 core balance transformer with a 35 mm internal diameter and 1000/1 ratio designed for earth leakage current detection applications.
£36.18
Why Choose the Carlo Gavazzi CTG035 Core Balance Transformer?
The Carlo Gavazzi CTG035 is a sensitive core balance transformer designed for detecting earth leakage currents in single-phase and three-phase electrical systems. As part of the Carlo Gavazzi CTG series, it monitors current imbalance through conductors passing through the transformer core and provides a secondary signal for use with compatible earth leakage monitoring relays.
The CTG035 features a compact 35 mm internal diameter and is designed for easy installation in electrical panels and industrial control systems. It is approved for use with Carlo Gavazzi DEA71 and DEB71 earth leakage monitoring relays, providing reliable protection against potentially hazardous current leakage conditions.
With a 1000/1 transformer ratio, an 80 A nominal current rating and support for systems up to 720 V AC, the CTG035 provides accurate residual current detection for applications including motors, pumps and electrical equipment installed in metallic structures.
Key Advantages
- High-sensitivity core balance transformer for earth leakage detection.
- 35 mm internal diameter suitable for compact cable installations.
- 1000/1 current transformer ratio for residual current monitoring applications.
- Compatible with Carlo Gavazzi DEA71 and DEB71 earth leakage monitoring relays.
- Suitable for both single-phase and three-phase mains systems.
- Compact design with panel mounting and DIN rail adapter compatibility.
Key Features
- Carlo Gavazzi CTG series core balance transformer.
- 35 mm internal aperture.
- 1000/1 transformer ratio.
- 80 A nominal current rating.
- 50–60 Hz operating frequency.
- 720 V AC maximum system voltage.
- 3 kV AC rated insulation level.
- IP20 protection rating for installation inside electrical enclosures.
Reliable Earth Leakage Detection for Industrial Systems
Core balance transformers such as the Carlo Gavazzi CTG035 detect differences between current flowing through phase conductors and the neutral conductor. When an imbalance occurs due to leakage current, the transformer generates a secondary signal that can be processed by an earth leakage monitoring device to provide an alarm or protective disconnection.
The CTG series provides a practical solution for improving electrical safety in industrial installations, helping protect motors, pumps and equipment where insulation faults or leakage currents may create hazardous conditions.
Typical Applications
- Earth leakage monitoring systems.
- Industrial motor protection applications.
- Pump and machinery protection systems.
- Electrical distribution panels.
- Equipment installed within metallic structures.
- Industrial automation safety systems.
Technical Specifications
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| Mounting Type | DIN rail, Panel / base | |
|---|---|---|
| Device Type | Solid-core CT | |
| IP Rating | IP20 | |
| Manufacturer | Carlo Gavazzi | |
| Series | CTG | |
| Model | CTG035 | |
| Product type | Core balance transformer | |
| Internal diameter | 35 mm | |
| Transformer ratio | 1000/1 | |
| Nominal current | 80 A | |
| Overload current | 480 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) | 64 × 74 × 20 mm | |
| Weight | Approx. 80 g | |
| Mounting | Panel mounting / DIN rail adapter | |
| Secondary connection | Screw terminals 2 × 2.5 mm² | |
| Operating temperature | -5 to +50 °C | |
| Standards | IEC 61869-2 |
Frequently Asked Questions
What is the Carlo Gavazzi CTG035 used for?
The CTG035 is a core balance transformer used to detect earth leakage currents by monitoring current imbalance in electrical conductors.
What is the internal diameter of the CTG035?
The Carlo Gavazzi CTG035 has a 35 mm internal diameter for routing monitored conductors through the transformer.
What is the transformer ratio of the CTG035?
The CTG035 has a 1000/1 transformer ratio for residual current monitoring applications.
Which monitoring relays are compatible with the CTG035?
The CTG035 is designed for use with compatible Carlo Gavazzi earth leakage monitoring relays including the DEA71 and DEB71 series.
Can the CTG035 be used on three-phase systems?
Yes, the CTG035 can be used on both single-phase and three-phase mains systems.
Trusted by Industrial Safety Engineers Worldwide
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.
