ABB TPU40.13 Current Transformer

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1. Product Overview

The ABB TPU40.13 is a high-precision current transformer (CT) designed for AC power systems, used for current measurement, protection, and energy metering. It converts high primary currents into a standard low secondary current (typically 5 A or 1 A) for safe and accurate measurement by instruments, protection relays, or control systems.

2. Technical Specifications

• Model: TPU40.13

• Type: Current Transformer (CT)

• Rated Primary Current (In): 40 A

• Rated Secondary Current (Is): 5 A

• Accuracy Class: 0.5 / 1.0 (depending on model)

• Rated Burden (VA): 5–10 VA

• Polarity: Marked P1/P2

• Insulation Class: IEC 60044 standard

• Rated Frequency: 50/60 Hz

• Construction Type: Ring / Split-core (depending on model)

• Operating Temperature: ‑25 °C to +55 °C

• Protection Rating: IP20

• Mounting: DIN rail or panel mounting

• Standards: IEC 60044-1, IEC 61869-2

3. Key Advantages & Features

1. High-Precision Measurement – Accurately converts primary current to standard secondary current.

2. Safe and Reliable – Low-voltage output for safe connection to instruments and protection devices.

3. Flexible Installation – Supports ring, split-core, or DIN rail mounting.

4. Industrial Environment Adaptability – Wide temperature range and humidity resistance.

5. Standardized Design – IEC compliant for easy integration and interchangeability.

6. Easy Maintenance – Compact design facilitates installation and maintenance.

4. Typical Applications

• Power system current measurement and monitoring

• Protection systems in distribution and control panels

• Energy metering and management systems

• Industrial automation and motor protection

• SCADA system data acquisition

5. Installation & Usage Notes

1. Current Matching – Ensure primary current rating matches system current to avoid saturation.

2. Proper Wiring – Observe P1/P2 polarity for correct measurement and protection direction.

3. Environmental Conditions – Avoid high humidity, high temperature, and corrosive environments.

4. Load Matching – Ensure secondary load does not exceed rated VA when connecting instruments or relays.

5. Secure Mounting – Mount firmly to prevent vibration affecting measurement and safety.