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Tektronix CT-4 Instruction Manual
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Tektronix CT-4 Instruction Manual

Tektronix CT-4 Instruction Manual

High-current transformer
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Instruction Manual
CT-4
High-Current Transformer
070-6478-02

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Summary of Contents for Tektronix CT-4

  • Page 1 Instruction Manual CT-4 High-Current Transformer 070-6478-02...
  • Page 2 Copyright E Tektronix, Inc. 1987. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A.

  • Page 3: Warranty

    Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
  • Page 5 (Optional)
  • Page 6 Optional DC Bucking Coil Optional Accessories...
  • Page 7 The CT 4 with current probe attached peak sinewave with A6302/A6302XL/A6312/TCP202 in the 1000:1 receptacle Maximum pulse amplitude versus duration, A6302/A6302XL/A6312 in 1000:1 Maximum pulse amplitude versus duration, A6302/A6302XL/A6312 in 20:1 Optional DC Bucking Coil Assembly Typical response of the CT 4 with the A6302/AM503B to a low frequency square wave...
  • Page 9 The CT 4 High Current Transformer is designed to extend the current measuring capa bility of the Tektronix A6302, A6302XL, A6312, TCP202, and P6021 Current Probes. The CT 4 extends the measurement range up to 1000 times. The CT 4 includes a pistol grip handle with two receptacles to accept the current probe in either the 1000:1 or 20:1 current ranges.
  • Page 11 The electrical characteristics listed in Table 1 1 are valid when the CT 4 is used with a cali brated oscilloscope and a calibrated A6312/A6302/A6302XL current probe with the AM503X amplifier, TCP202 current probe, or P6021 current probe. The instruments must be operated within the environmental limitations stated in Table 1 3.
  • Page 12 20,000 A peak, not to exceed 50% duty factor 3,000 V peak, < 11% duty 1,000 V CAT III with factor, < 100 msec period uninsulated conductor included (optional)
  • Page 13 CT 4 With Optional DC (optional)
  • Page 14 Altitude Non Operating To 15,240 m (50,000 ft) Operating 4,572 m (15,000 ft) 600 V CAT III or 1,000 V CAT II 2,000 m (6,562 ft) 1,000 V CAT III Table 1 4 Certifications and compliances EC Declaration of Compliance was demonstrated to the following specifi cation as listed in the Official Journal of the European Conformity - Low Communities:...
  • Page 15 The CT 4 High Current Transformer may be used with the A6312, A6302 or A6302XL Current Probes and the AM 503/A/B or AM 5030 Current Probe Amplifiers. The CT 4 can also be used with the TCP202 AC/DC Current Probe or the P6021 AC Current Probe. Some of the electrical characteristics are different depending on the current probe you select (see page 1 1).

  • Page 16: Probe Installation

    The DC Bucking Coil is an optional accessory to the CT 4. Probe Installation Install the current probe in the CT 4 as follows: 1. Degauss the probe (if so equipped). 2. Select the appropriate receptacle based on the anticipated current magnitude. 3.
  • Page 18 length supplied as a standard accessory will provide approximately three layers when wrapped around the largest conductor that the CT 4 will accept. Center the CT 4 on at least a six inch width of insulation. Do not use damaged insulation wrap.
  • Page 19 Fig. 2 4 shows the maximum recommended measurement duration for a 1000 A peak to peak sinewave with the A6302, A6302XL, A6312, or TCP202 on the 1000:1 receptacle. Figs. 2 5 and 2 6 are derating curves for the P6021. Fig.
  • Page 20 The maximum pulse current that can be measured using the CT 4 is limited by transformer core saturation. Figs. 2 7 and 2 8 are graphs of maximum pulse amplitude versus duration for the A6302, A6302XL, A6312, and TCP202. The amp second product specification provides a basis for calculating the current limitation with any given pulse width.
  • Page 21 100,000 A 10,000 A 1000 A 100 A 10 A 0.1 A 1 ms 10 ms 100 ms 1 ms 10 ms 100 ms Pulse width Fig. 2 7. Maximum pulse amplitude versus duration with A6302/A6302XL/A6312 in the 1000:1 receptacle of the CT 4...
  • Page 22 100,000 A 10,000 A 1000 A 100 A 10 A 0.1 A 1 ms 10 ms 100 ms 1 ms 10 ms 100 ms Pulse width Fig. 2 8. Maximum pulse amplitude versus duration with A6302/A6302XL/A6312 in the 20:1 receptacle of the CT 4...
  • Page 24 To measure low current levels in conductors too large for the A6302/A6302XL/A6312 and TCP202 core openings, two or more loops may be passed through the CT 4. Sensitivity in creases directly with the number of turns. Remember, however, that the impedance re flected back into the primary (circuit being measured) from the secondary (probe winding) varies a square function of the primary turns.
  • Page 25 DC Bucking Coil (Optional) The DC Bucking Coil (Tektronix Part No. 015 0190 00 is an optional accessory to the CT 4. Normally, distortions due to core saturation occur when attempting to observe or mea sure ac signal currents in the presence of dc currents exceeding approximately 20 am peres.
  • Page 26 Fig. 2 12. Optional DC Bucking Coil assembly...
  • Page 29 the base assembly for the optional DC Bucking Coil. optional Bucking Coil and Base Assembly normally do not require any preventive mainte nance. Use a soft bristle brush to dislodge the dust and wipe clean with a lint free cloth. An alco hol type cleaner may be used to remove persistent dirt.
  • Page 30 The CT 4 is a very rugged device and should remain trouble free when used within the specified limits. However, if the CT 4 becomes damaged, replacement parts are available. Refer to the exploded view and parts list in the rear of this manual for Tektronix part numbers.
  • Page 33 TEKTRONIX TDS 460A Wavetek 9100 Universal Calibration System with Oscilloscope Calibration Module (Option 250) TEKTRONIX AM503B...

  • Page 34: Square Wave Generator

    TDS 460A Oscilloscope SQUARE WAVE AM 503B GENERATOR...
  • Page 35 c. Set the CURRENT/DIV on the AM503X to 1 mA/div. The A6302 should be clamped onto the 20:1 Current Ration Loop of the CT 4. d. Set the frequency of the square wave generator to 100 Hz and adjust the amplitude for 5 divisions of vertical deflection on the oscilloscope.
  • Page 36 e. Adjust the frequency of the square wave on the generator so that one complete cycle occurs in 8 major divisions on the screen (80 ms). CT 4 with Optional DC Bucking Coil Connect the A6302 probe to the 1000:1 ratio loop.
  • Page 40 –04 –17 334–9574–00 MARKER,IDENT:LABEL 80009 334–9574–00 070–6478–XX 070–6478–XX...