Portable Transformer Ratiometer Model 4167F


  • Ratio range from 0.75 to 10,000:1
  • Full automated measurement
  • Features unique vector group detection
  • Measuring voltage from 8V to 160V selectable or used from external source (8V .. 240V)
  • Display shows ratio, phase angle, deviance and magnetising current
  • Internal card reader supports handling parameter chip cards for saving all transformer specific measurement data.
  • Easy to read LC display (256 x 128 pixel) with back light
  • Special built in keyboard supports easy input of vectorgroup, phase measuring mode and parmeter
  • RS232C port to get full external control over the instrument
  • Centronics printer port
  • Robust mobile case for field

For more information about this product contact Tinsley

See the table below for a run-down of this product's technical data.

Ratio measurement

Range 0.75 – > 10,000 : 1
Max. errors (0,75 .. 2.500)
± 0.1 % ± 1 d at 40 V .. 200 V
± 0.15% ± 1 d at 8 V .. 40 V
Max. errors (2.500 .. 5.000)
± 0.2 % ± 1 d at 40 V .. 200 V
± 0.3 % ± 1 d at 8 V .. 40 V
Max. errors (5.000 .. 10.000)
± 0.3 % ± 1 d at 80 V .. 200 V
Max. errors (> 10.000)
not specified (200 V)
Measuring voltage
8 V, 40 V, 80 V, 160 V selectable or by external source (8V .. 240 V)
Measuring frequency
45 Hz – 65 Hz (Line depended)
Range selection
full automatic

Phase angle measurement

Range (one phase)
- 9.9 ° to + 9.9 °
Range (three phase)
- 179.9 ° to + 180 °
Max. error
± 0.1 ° ± 2 digit


Magnetising current measurement

1 mA – 2000 mA ± 1 %



Connections OS
1U, 1V, 1W, 1N, (H0..H3) Amphenol
Connections US
2U, 2V, 2W, 2N, (X0..X3) Amphenol
Connections ext. excitation
8 V – 240 V AC, STASEI 5


Error detection

Contact-,Stability errors
displays: HV/LV too low or too high, HV/LV interchanged and bad line stability
Set point input
using front keys, via RS232 or chip card
shown on display, via RS232
Start of measurement
using front panel, via RS232
256 x 128 pixel LC display, back light
Result format
vector group, actual phase, actual tap-position, ratio and deviation,
phase angle and deviation, exiting current, pass-fail result ref. to set point
Measuring Time
5 ... 20 s depending on line noise/distortion
Measurement Storage
200 sets of measurement data on chip card
Correct Connection
tested before each measurement
RS232C (full device control) printer (parallel, ANSI standard)
Operating: 0° .. 50°C Storage: -5° ... 60°C
0 ... 90% (Storage 95%) non condensing
EMC, Safety, Vibration
CE , IEC-1010-1 , ASTM D 999.75
490 x 400 x 190 mm (WxDxH, mobile ABS rugged case)
approx. 12 kg without cables (mobile version)

Setting up the instrument is a simple case of typing in the vector group using the instrument front panel keypad and connecting to the offline transformer. All three phases are measured consecutively
with connecting and short circuit procedures at the primary and secondary voltage terminals performed automatically before each measurement. It is also possible to measure just one phase if required.

An adjustable set value permits the display of any error or deviation from the required transformation ratio. It is also possible for the 4167F to control the transformer tap changer and in this case all phases and taps are measured consecutively. Results can be stored internally using a transformer specific memory card, printed to an external printer or transferred to a PC via an RS232 interface.

By using a memory card, pre-programmed for a specific transformer type, the instrument can be made to show a PASS / FAIL message with the actual reading.

The transformer specific memory cards can be easily programmed via a personal computer using the built in card reader or by a cost efficient external card reader/writer directly connecting to a personal computer.

A market unique feature is the automatic vector group detection. If all connections to the transformer have been made, the correct vector group will be detected. In case of missing a connection (1N or 2N e.g.) there will be up to three possible vector groups displayed to the user. Once the correct vector group has been selected the instruments learns this and that group will be presented first next time.

The 4167F is connected to the H.V. and L.V. windings via four connections each. It also powers the transformer at a preset voltage supplied by an internal isolating transformer. However, external excitation using different voltages and frequencies is also possible. is its simplicity to set-up.

The 4167F is housed in a robust carrying case. All connections are provided at the front panel of the instrument and are locked in order to avoid accidental disconnection during a measurement. An alarm-warning lamp is also available and will illuminate whilst a measurement is in progress.

  • Warning light: The warning light shows if voltage appears on the test object during measurement.
  • Cable HV 4pole, various lengths, amphenol jack and clamps (U, V, W, N)
  • Cable LV 4pole, various lengths, amphenol jack and clamps (U, V, W, N)
  • Calibration certificate
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