Portable Transformer Ratiometer Model 4167F
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Portable Transformer Ratiometer Model 4167F

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.

Accessories

  • 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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  • 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

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Technical Data Overview

Ratio Measurement

Range: 0.75 to >10,000 : 1

Max. errors (0.75 to 2,500):

  • ±0.1% ±1 digit at 40 V to 200 V
  • ±0.15% ±1 digit at 8 V to 40 V

Max. errors (2,500 to 5,000):

  • ±0.2% ±1 digit at 40 V to 200 V
  • ±0.3% ±1 digit at 8 V to 40 V

Max. errors (5,000 to 10,000):

  • ±0.3% ±1 digit at 80 V to 200 V

Max. errors (>10,000):

  • Not specified (200 V)

Measuring voltage: 8 V, 40 V, 80 V, 160 V selectable, or external source (8 V to 240 V)
Measuring frequency: 45 Hz to 65 Hz (line dependent)
Range selection: Fully automatic

Phase Angle Measurement

Range (single phase): -9.9° to +9.9°
Range (three phase): -179.9° to +180°
Max. error: ±0.1° ±2 digits

Magnetising Current Measurement

Range: 1 mA to 2000 mA ±1%

Multiplexer

Connections OS: 1U, 1V, 1W, 1N, (H0 to H3), Amphenol
Connections US: 2U, 2V, 2W, 2N, (X0 to X3), Amphenol
External excitation: 8 V to 240 V AC, STASEI 5

Error Detection

Detects contact and stability errors
Displays: HV/LV too low or too high, HV/LV interchanged, poor line stability

Control & Operation

Set point input: Front keys, RS232, or chip card
Deviations: Displayed on screen or via RS232
Start of measurement: Front panel or RS232

Display & Output

Display: 256 × 128 pixel LCD with backlight
Result format includes:

  • Vector group
  • Actual phase
  • Tap position
  • Ratio and deviation
  • Phase angle and deviation
  • Excitation current
  • Pass/fail result based on set point

Performance

Measuring time: 5 to 20 seconds (depending on line noise/distortion)
Measurement storage: Up to 200 data sets on chip card
Connection check: Performed before each measurement

Interfaces

Ports: RS232C (full control), parallel printer (ANSI standard)

Environmental Conditions

Operating temperature: 0°C to 50°C
Storage temperature: -5°C to 60°C
Humidity: 0% to 90% (storage up to 95%), non-condensing

Compliance

Standards: CE, IEC-1010-1, ASTM D 999.75

Physical Characteristics

Dimensions: 490 × 400 × 190 mm (W × D × H), rugged mobile ABS case
Weight: Approximately 12 kg (without cables)

DATASHEET Model 4167F
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