T&R TPT9000 Transformer Polarity Tester
The T&R TPT9000 Transformer Polarity Tester is a flick tester for checking the correct polarity of current and voltage transformers. It gives commissioning engineers a simple way to carry out polarity checks on dead systems where external voltages are absent. Its plug-and-play design, compact construction and low weight help make routine use straightforward.
Automatic connection detection helps identify when a transformer has been connected incorrectly. The T&R TPT9000 Transformer Polarity Tester also includes a proving unit so users can verify on-site operation before testing. Fused 600 V CAT IV test leads use shrouded 4 mm connectors, while F500mA HRC fuses provide overload protection for the individual leads.
Built for industrial and electrical substation environments, the tester operates at altitudes up to 2000 m above sea level. It works from a single PP3 9 V battery and monitors the battery level automatically, preventing a test when the voltage is below a usable level. The T&R TPT9000 Transformer Polarity Tester also offers long battery life and is supplied with carrying and connection accessories for practical field use.
Key Benefits
- Checks current and voltage transformer polarity quickly.
- Automatically detects incorrect transformer connections.
- Simple plug-and-play operation supports straightforward field testing.
- Compact and lightweight construction makes the unit easier to carry and position.
- Included proving unit allows operation to be checked on site before use.
- Fused test leads provide protected connections during testing.
- Automatic battery monitoring prevents testing below a usable battery voltage.
- Protective carrying equipment supports storage and transport between jobs.
- Long battery life supports extended field use from a single PP3 9 V battery.
Common Applications
T&R TPT9000 Transformer Polarity Tester is suitable for a range of testing, maintenance and inspection tasks, including:
- Checking the polarity of current transformers.
- Checking the polarity of voltage transformers.
- Transformer polarity checks during commissioning work.
- Testing in industrial electrical environments.
- Testing in electrical substations.
- Identifying incorrectly connected transformers.
- On-site confirmation of tester operation with the proving unit.
- Polarity testing on dead systems with external voltages absent.
Why Choose This Model?
The T&R TPT9000 combines current and voltage transformer polarity testing with automatic incorrect-connection detection, a proving unit and fused 600 V CAT IV test leads. Its compact, lightweight format and single-battery operation make it well suited to commissioning and substation work.





