Transformer Test Equipment
Portable Transformer Ratiometer Model 4167P
 The Tinsley Transformer Ratiometer type 4167P measures the transformation ratio of large transformers and also gives an indication of any small phase difference between the high voltage and low voltage windings (e.g. primary and secondary).
The ratio and phase difference or ratio and energising voltage are displayed on two large digital LCD displays with optional back light for use in poor light conditions.
In use the High Voltage winding of the transfomer under test is connected to the "H.V. Winding" terminals of the instrument and is energised by the internal power oscillator at a nominal 60 Volts AC./50Hz. The low voltage winding (Step down) is connected to the "L.V. Winding" terminals.
The display of transformer turns ratio and transformer phase difference is then entirely automatic.
For more information about this product contact Tinsley
Measurement Technique
The measurement technique is to measure the H.V. and L.V. voltages during several parts of the cycle to obtain in-phase and quadrature values from which the ratio and phase difference are calculated.
The input circuits are isolated by transformers, therefore the instrument should not be damaged by the very high voltages possible if the connections from the transformer being measured are accidentally reversed.
The measurement circuits are further protected by front panel fuses with internal surge absorbers.
Measurement Technique
The 4167P is fitted with rechargeable batteries and has an internal charger. The instrument can be used connected to a mains power supply or will operate from the internal batteries for a period of up to 8 hours from a full charge.
Specifications
See the table below for a run-down of this product's specifications.
Ratio range |
1:1 to 300:1 |
Accuracy |
1:1 to 9.99:1 = 0.1%
10:1 to 99.99:1 = 0.1%
100:1 to 149.9:1 = 0.2%
150:1 to 300:1 = 0.5% |
Resolution |
The ratio is displayed in one of three ranges
1:1 to 9.99:1 = 0.001%
10:1 to 99.99:1 = 0.01%
100:1 to 300:1 = 0.1% |
Phase difference |
± with a resolution of 0.01 (approx. 0.5°) |
Displays |
LCD with optional back light
Ratio 1.000 to 9998 (9999=over range)
Phase ± 0.000 to 198 (199=over range) |
Measurement voltage |
Nominally 60V at power frequency dependent on load |
Input protection |
Front panel fuses and internal surge absorbers |
Power supply |
AC mains 50 - 60 Hz
Universal input of 90 - 260 Volts AC |
VA rating |
Approximately 20VA |
Dimensions |
470 x 150 x 280mm |
Net Weight |
Approximately 8kg |
For more information about this product contact Tinsley
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