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OPERATING INSTRUCTIONS
for the
KNOPP TYPE KATC-V
AUTOMATIC TRANSFORMER COMPARATOR
Leaflet Number 2-014
PM-19-10-004
Revision F
Initial Release: 9/12/19
Updated: 9/12/19
Knopp – A TESCO Company
1307 – 66th Street
Emeryville, California 94608
(510) 653-1661
sales@knoppinc.com
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U
www.knoppinc.com
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Summary of Contents for Tesco KNOPP KATC-V
- Page 1 OPERATING INSTRUCTIONS for the KNOPP TYPE KATC-V AUTOMATIC TRANSFORMER COMPARATOR Leaflet Number 2-014 PM-19-10-004 Revision F Initial Release: 9/12/19 Updated: 9/12/19 Knopp – A TESCO Company 1307 – 66th Street Emeryville, California 94608 (510) 653-1661 sales@knoppinc.com www.knoppinc.com...
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Page 2: Table Of Contents
Contents 1. General Information ....................1 2. Specifications ......................1 3. Installation ........................2 Portable Use ....................2 Installation In Knopp Type KVTS Transformer Test System ..... 4 4. Operation ........................4 Description of Controls ................4 Operating Procedures ................5 One-to-One Test .................. -
Page 3: General Information
OPERATING INSTRUCTIONS KNOPP TYPE KATC-V AUTOMATIC TRANSFORMER COMPARATOR General Information The Knopp Automatic Transformer Comparator (KATC-V) is used to measure the ratio and phase angle errors of voltage transformers with respect to a "standard" transformer. This microprocessor-based instrument automatically selects the opti- mum measurement range, computes the results, and digitally displays the trans- former errors, the ANSI accuracy class for which the transformer qualifies, and the test voltage. -
Page 4: Installation
Resolution: Phase Angle Accuracy (Minutes) Class 0.0 Accuracy Class < 0.2 0.00001 0.01 0.01 0.2 Accuracy Class < 0.7 0.00001 0.01 0.7 Accuracy Class < 1.4 0.0001 0.01 1.4 Accuracy Class < 10 0.0001 0.01 10 Accuracy Class 0.0001 Installation Portable Use... - Page 5 Notes: Terminal G is internally connected to the KATC-V front panel and chassis — and grounded through the power cord plug. If the power cord is ungrounded, connect G to system ground. If the power cord is grounded, and one of the secondary leads is at system ground, do not connect G to system ground.
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Page 6: Installation In Knopp Type Kvts Transformer Test System
Installation In Knopp Type KVTS Transformer Test System See the instruction manual supplied with the KVTS. Operation Description of Controls ON/OFF Switch: Controls 120 VAC power to the KATC-V. PERCENT/RCF Switch: Allows the ratio error to be displayed in Ratio Correction Factor (RCF) or Percent ... -
Page 7: Operating Procedures
button is pressed, the voltage at which the test results were taken is recalled to the display. After a short time, the display will again indicate the applied voltage (if any) in real-time. RESET Push-button: Clears "HOLD/PRINT" status. Used to reset the KATC-V after correcting an error that caused an "alarm"... -
Page 8: One-To-One Test
the KATC-V display next to the display of test voltage. Each time the HOLD/PRINT button is pressed, the voltage at which the displayed results were taken is recalled to the display for a short time. The display then returns to showing the presently applied volt- age. -
Page 9: Alarm Conditions
ACCURACY CLASS), press HOLD/PRINT — then reduce the volt- age to zero. This data should be compared to any One-to-One data originally taken with the equipment. Errors in excess of ±0.025% on ratio or ±2 minutes on phase angle should be investigated. Record the data. -
Page 10: Doesn't Work The First Time
Doesn't Work The First Time If your KATC-V doesn't work after you have just unpacked it and applied power for the first time, the problem is probably a bad connection resulting from shipment. Remove the rear door and "re-seat" all the printed circuit cards and the ribbon cables. -
Page 11: Test Voltage Display Remains At (Or Near) Zero
Figure 3 - KATC-V Printed Circuit Cards Test Voltage Display Remains at (or Near) Zero If the digital voltage display on the KATC-V does not increase as the variac knob on the test equipment is turned, or the test results are not believable, the most probable reason is a tripped circuit breaker on the rear of the KATC-V. -
Page 12: No Zero Crossing" Message
The most probable causes of a tripped breaker are: the selection of an improper voltage range for the transformer-under- test or, the improper connection of the transformer-under-test. Make sure that the "interlock" feature is connected to help prevent future problems. Note that the internal KATC-V interlock relay is capable of carrying a maximum of 120 or 240 Volts at 10 Amperes. -
Page 13: Test Voltage Display Inaccurate
troubleshooting. Test Voltage Display Inaccurate The KATC-V display of secondary test voltage can be changed by adjusting R9 on Card 2 [See Figure 3, above]. 1. Place an accurate voltmeter across terminals S and C on the KATC-V rear terminal strip. 2. -
Page 14: Rs-232 Data Record Formats
RS-232 DATA RECORD FORMATS There are four possible data records for the KATC-V: Ratio Error and Minutes Ratio Error and Milliradians Ratio Correction Factor and Minutes Ratio Correction Factor and Milliradians Data files of KATC-V data are written in ASCII format and can be printed as ASCII files. They will appear in the same formats as the examples shown later in this document. -
Page 15: 6.3.1 Ratio Error And Minutes
6.3.1 RATIO ERROR AND MINUTES ASCII format: {CR}{LF}{CR}{LF} VT TEST: {CR}{LF} TEST RATIO PHASE ACCURACY {CR}{LF} VOLTAGE ERROR ERROR CLASS {CR}{LF} (VOLTS) (MINUTES) {CR}{LF} 120.0 +0.002 +0.26 0.01 {CR}{LF} {CR}{LF}{CR}{LF} Record layout: +)0)0)0), ***#***#* .)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * *V*T* *T*E*S*T*:* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ***#* .)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * * *T*E*S*T* * * * * *R*A*T*I*O* * * * * * *P*H*A*S*E* * * * *A*C*C*U*R*A*C*Y* ***#*... -
Page 16: Ratio Error And Milliradians
6.3.2 RATIO ERROR AND MILLIRADIANS ASCII format: {CR}{LF}{CR}{LF} VT TEST: {CR}{LF} TEST RATIO PHASE ACCURACY {CR}{LF} VOLTAGE ERROR ERROR CLASS {CR}{LF} (VOLTS) (MILLIRAD.) {CR}{LF} 120.0 +0.002 +0.08 0.01 {CR}{LF} {CR}{LF}{CR}{LF} Record layout: +)0)0)0), ***#***#* .)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * *V*T* *T*E*S*T*:* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ***#* .)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * * *T*E*S*T* * * * * *R*A*T*I*O* * * * * * *P*H*A*S*E* * * * *A*C*C*U*R*A*C*Y* ***#*... -
Page 17: Ratio Correction Factor And Minutes
6.3.3 RATIO CORRECTION FACTOR AND MINUTES ASCII format: {CR}{LF}{CR}{LF} VT TEST: {CR}{LF} TEST RATIO PHASE ACCURACY {CR}{LF} VOLTAGE CORR. ERROR CLASS {CR}{LF} (VOLTS) FACTOR (MINUTES) {CR}{LF} 120.0 0.99997 -0.03 0.00 {CR}{LF} {CR}{LF}{CR}{LF} Record layout: +)0)0)0), ***#***#* .)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * *V*T* *T*E*S*T*:* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ***#* .)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * * *T*E*S*T* * * * * *R*A*T*I*O* * * * * * *P*H*A*S*E* * * * *A*C*C*U*R*A*C*Y* ***#*... - Page 18 6.3.4 RATIO CORRECTION FACTOR AND MILLIRADIANS ASCII format: {CR}{LF}{CR}{LF} VT TEST: {CR}{LF} TEST RATIO PHASE ACCURACY {CR}{LF} VOLTAGE CORR. ERROR CLASS {CR}{LF} (VOLTS) FACTOR (MILLIRAD.) {CR}{LF} 120.0 0.99997 -0.03 0.00 {CR}{LF} {CR}{LF}{CR}{LF} Record layout: +)0)0)0), ***#***#* .)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * *V*T* *T*E*S*T*:* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ***#* .)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)2)- +)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0)0), * * *T*E*S*T* * * * * *R*A*T*I*O* * * * * * *P*H*A*S*E* * * * *A*C*C*U*R*A*C*Y* ***#*...
- Page 19 Warranty The Knopp Type KATC-V Automatic Transformer Comparator is warranted against defects in materials and workmanship for a period of ONE YEAR. If the KATC-V does not perform in accordance with stated operating specifications during the warranty period, necessary parts and assistance will be supplied under warranty to restore the equipment to service.
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