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2CSM029000R1211 ABB TRM Modular Toroidal Transformer 29 mm
ABB TRM is a compact 29 mm closed-core modular toroidal transformer with a 500/1 transformation ratio designed for residual current and earth leakage monitoring with compatible ABB residual current devices.
£95.23
Why Choose the ABB TRM Toroidal Transformer?
The ABB TRM is a compact modular toroidal transformer designed for residual current and earth leakage monitoring in low-voltage electrical installations. As part of the ABB TR toroidal transformer series, it works with compatible ABB residual current relays and monitors to detect current imbalance in the active conductors passing through the transformer.
With a 29 mm internal diameter and closed-core construction, the TRM provides a compact sensing solution for conductors installed in distribution boards, switchboards and control panels. Its modular format is particularly well suited to installations where space is limited while dependable residual current sensing is required.
The TRM provides a 30 mA minimum measurable current, 500/1 transformation ratio and IP20 protection. It is designed for use with compatible ABB residual current monitoring equipment, including RD2/RD3 and ELR devices, providing a reliable interface between the monitored conductors and the associated protection relay.
Key Advantages
- Compact modular toroidal transformer for residual current monitoring.
- 29 mm internal diameter for conductors in compact electrical assemblies.
- Closed-core construction provides dependable residual current sensing.
- 30 mA minimum measurable current supports sensitive earth leakage monitoring.
- 500/1 transformation ratio for compatible residual current monitoring equipment.
- Designed for use with compatible ABB RD and ELR residual current devices.
- IP20 protection rating for installation inside suitable electrical enclosures.
Key Features
- ABB TR series modular toroidal transformer.
- 29 mm internal diameter.
- Closed-core construction.
- 30 mA minimum measurable current.
- 500/1 transformation ratio.
- 1000 V AC maximum insulating voltage.
- 2.5 kV dielectric test voltage at industrial frequency for 1 minute.
- 40 kA for 1 second maximum thermal overload.
- -10 to +70 °C operating temperature.
- IP20 protection degree.
Reliable Residual Current Monitoring
Toroidal transformers monitor the vector sum of the currents flowing through the active conductors of an electrical circuit. Under normal operating conditions these currents balance each other, while leakage to earth creates an imbalance that produces a measurement signal for the connected residual current relay or monitor.
The ABB TRM combines a compact modular format with a 29 mm closed-core aperture and sensitive residual current measurement capability. When paired with compatible ABB residual current monitoring equipment, it provides dependable earth leakage sensing for industrial and commercial electrical distribution systems.
Typical Applications
- Residual current and earth leakage monitoring systems.
- Low-voltage electrical distribution boards.
- Industrial switchboards and control panels.
- Machinery electrical protection systems.
- Commercial building electrical distribution.
- Installations using compatible ABB RD or ELR residual current devices.
Technical Specifications
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| Rated Burden (VA) | 5 VA | |
|---|---|---|
| Device Type | Solid-core CT | |
| Rated Primary Current (A) | 200 A | |
| Aperture (mm) | 18 mm | |
| Series | TR Toroidal Transformers | |
| ABB order code | 2CSM029000R1211 | |
| Product type | Modular toroidal transformer | |
| Core type | Closed | |
| Internal diameter | 29 mm | |
| Minimum measurable current | 30 mA | |
| Transformation ratio | 500/1 | |
| Maximum insulating voltage | 1000 V AC | |
| Dielectric test voltage | 2.5 kV for 1 minute | |
| Maximum thermal overload | 40 kA for 1 second | |
| Connections | Screw terminal boards | |
| Maximum conductor section at terminals | 2.5 mm² | |
| Protection rating | IP20 | |
| Operating temperature | -10 to +70 °C | |
| Storage temperature | -20 to +80 °C | |
| Installation position | Any | |
| Dimensions (H × W × D) | 85 × 58 × 58 mm | |
| Weight | approx. 0.17 kg |
Frequently Asked Questions
What is the ABB TRM used for?
The ABB TRM is a toroidal transformer for residual current and earth leakage monitoring, providing a measurement signal to a compatible residual current relay or monitor.
What is the internal diameter of the ABB TRM?
The TRM has a 29 mm internal diameter and is designed as a compact modular toroidal transformer.
What is the minimum measurable current of the ABB TRM?
The ABB TRM has a specified minimum measurable current of 30 mA.
What is the transformation ratio of the ABB TRM?
The TRM has a 500/1 transformation ratio for use with compatible residual current monitoring equipment.
Which devices can the ABB TRM be used with?
The TRM is designed for use with compatible ABB residual current monitoring and protection devices, including RD2/RD3 and ELR residual current relays and monitors.
Trusted ABB Residual Current Monitoring Technology
ABB TR toroidal transformers provide dependable residual current sensing for electrical distribution systems, with the compact TRM combining a modular design, 29 mm aperture and sensitive earth leakage measurement for integration with compatible ABB monitoring devices.
