The SXBB Automatic Transformer Turns Ratio Tester is a high-performance transformer diagnostic instrument developed for accurate and efficient transformer ratio measurement.

Transformer turns ratio testing is an essential inspection method used during transformer manufacturing, installation, commissioning and preventive maintenance.

By measuring the relationship between primary and secondary winding voltage, engineers can verify whether the transformer meets design requirements and identify possible problems caused by incorrect winding connections, manufacturing defects or transportation damage.

Sansion Power SXBB series integrates automatic measurement technology, intelligent calculation functions and digital data management to provide a complete testing solution for power transformers, distribution transformers, PTs and CTs.

The transformer ratio tester is designed with a three-phase sine-wave inverter output system, providing stable test signals and improving measurement accuracy.

A transformer is one of the most important components in power transmission and distribution systems.

The transformer turns ratio directly determines voltage conversion performance.

The basic formula is:

Turns Ratio = N1/N2 = U1/U2

Where:

• N1 represents high voltage winding turns
• N2 represents low voltage winding turns
• U1 represents primary voltage
• U2 represents secondary voltage

During transformer operation, abnormal turns ratio values may indicate:

• Incorrect winding connection
• Transformer manufacturing problems
• Internal winding damage
• Installation errors
• Long-term operation aging

Using an automatic transformer ratio tester helps engineers quickly verify transformer conditions and improve power system reliability.

The SXBB TTR Tester accurately measures the ratio between transformer high-voltage and low-voltage windings.

Applications include:

• Factory inspection
• Transformer commissioning
• Maintenance testing
• Acceptance testing

The tester automatically determines transformer connection group.

This function helps verify phase relationship and winding configuration, reducing manual calculation requirements.

The equipment supports voltage transformer ratio measurement.

It helps users verify PT performance for:

• Metering systems
• Protection systems
• Substation applications

SXBB supports current transformer ratio and polarity verification.

Accurate CT testing ensures reliable operation of:

• Protection relays
• Energy measurement systems
• Monitoring equipment

SXBB provides precise measurement capability:

• Ratio ≤500: Accuracy ±0.1%
• Ratio 500~3000: Accuracy ±0.2%
• Ratio >3000: Accuracy ±0.3%

The automatic blind test function simplifies operation.

Engineers can complete testing without complicated parameter settings, reducing testing time and operation mistakes.

Advanced three-phase sine-wave inverter technology provides:

• Stable output
• Reliable measurement
• Better anti-interference capability

The tester supports:

• Color LCD display
• USB storage
• Thermal printing

Test results can be saved and printed conveniently.

Manufacturers use SXBB for quality inspection before transformer delivery.

Utilities use the tester for transformer condition verification.

Engineers use SXBB to confirm transformer installation accuracy.

Professional testing companies use SXBB as a reliable transformer diagnostic solution.

A TTR tester is used to measure transformer winding ratio and verify transformer connection performance.

Yes. SXBB supports CT ratio and polarity testing.

Yes. The compact design and intelligent operation make it suitable for field applications.