Computerized LCR TZ Test System CVCT-S20
Automatic test equipment for Transformers
Ideal
for fast and fool proof testing of COILS AND SMALL TRANSFORMERS
like SMPS transformers, Telecom
transformers (HYBRID,
POT CORE, RM-CORE), Pulse transformers etc. The systems scans at one
stroke, all the windings of a transformer and tests as per definition of
test procedure. The test procedure can be pre-programmed and stored under
User friendly menu driven software . Any semi-skilled and unskilled person
can be engaged for actual testing purpose. Can
Select test frequency, pin number, parameters, test conditions,
limits for each test. Test any pin to any other pin any defined parameter.
 |
Test parameters
include
Inductance, Capacitance, Transformation Ratio, Winding Polarity, Inductance Un-balance, Capacitance Un-balance, Resistance Un-balance, Impedance Un-balance. |
Special options for telecom parameters like LONGITUDINAL BALANCE, INSERTION LOSS, RETURN LOSS can be opted with custom designed equipment.
PC Control SoftwareThe instrument is controlled through external PC through RS232C port. The system stores the test results to database tables. The system software works on Windows platform.
View & Print Test Results (Database)
All the test results will be transferred to a database files with connected file
name. The database table is compatible to fox-pro table. You can import these
files to other softwares for creating graphs and other analysis.
SPECIFICATIONS
:
Measurement Frequencies:
50, 100, 500, 800 HZ;
1K, 2K, 5K, 10K HZ.
Measurement Voltage:
0.1 V – 1.0 V RMS adjustable under program
control.
Four terminal or Kelvin type of testing:
Provided to eliminate lead resistance.
Test
Parameter
Range
Accuracy
Power Requirements:
230V+10% 50HZ AC Mains
INDUCTANCE (L)
0.1 uH-100H
+0.2%+1dgt @1KHZ,
+0.5%+1dgt @ Other Freq.
RESISTANCE (Rac)
0.01 Ohm- 200Kohm
+0.2%+1dgt @
1KHZ, +0.5%+1dgt @ Other Freq.
RESISTANCE (Rdc)
0.01 Ohm - 20Kohm
+0.2%+1dgt
IMPEDANCE (Z)
0.01 Ohm - 200Kohm
+0.2%+1dgt @
1KHZ, +0.5%+1dgt @ Other Freq.
CAPACITANCE (C)
1pf - 200Ufd
+0.2%+1dgt @
1KHZ, +0.5%+1dgt @ Other Freq.
TRANSFORMATION RATIO (TR)
1 - 1000T (RATIO)
+0.2%+0.1T @
1KHZ, +0.5%+0.2T @ Other Freq.
TAN DELTA (D.F.)
0.0001-9.999
+0.0002+1%rdg @
1KHZ, +0.001+2%rdg @ Other Freq.
QUALITY FACTOR (Q.F.)
0.001- 999
+2%+0.1Q @ 1KHZ,
+5%+0.5Q@ Other Freq.
CAP.UN BAL (CU)
C>10nF
+0.1%rdg +0.1% of
C
RES.UN BAL (RU)
R>10 Ohm
+0.1%rdg +0.1% of
R
IMP.UN.BAL (ZU)
Z>10 Ohm
+0.1%rdg +0.1% of
Z
Options
The following options are available which are
offered separately on request.
Telecom parameters:
Longitudinal balance, Insertion loss, Return Loss, Frequency response. These
parameters can not be generalized in CVCT . The customer
has to send test conditions required with samples of the components to offer
these parameters.
DC Current Bias: Customer
can opt for this facility for testing coils under DC bias conditions.
Composite Testing window
Creating New Test Data
Password Requirement:
The control software expects two levels of users.
Level-1 user - Person with Password: A person who understands the
transformer, its windings, drawings, specifications. This person
will be provided with the password and will
be able to access all menu items. Level-2 user - Person without Password: This
persons can select the test file, test the components and take reports.
Shorting provision: (For
measurement of series aiding and for leakage inductance test )
In addition to 20 pin scanning the system has 2 rows of shorting relays to short
between any two or more defined pins. Where ever you need programmed shorting,
define in your test procedure. This shorting is very handy for
testing parameters like Impedance and leakage
inductance. With the help of these two rows you can also make two or three
windings in series for measurement.
Kelvin Test: The instrument has 2 pairs of connections.
One pair for drive and the other pair for sense. This separate connection can be
utilized for testing transmission / transformation parameters. You will be able
to test transformation ratio.
Impedance Test: Though impedance is 2 pin test, it also involves
connection of load impedance or load resistance. If you are testing impedance
only, you can connect the load impedance permanently to the test jig.
However if you want to test multiple windings and other parameters along with
impedance, you can use the shorting provided in the system.
Winding Polarity Test: In addition to
Transformation ratio test, the system also checks the polarity of
winding with respect to reference winding. If the
secondary is not in phase with primary then the system displays -ve
sign.
Unbalance Test: This test calculates the percentage unbalance of the
previous two tests. You can measure unbalance of Inductance, Capacitance,
Resistance and Impedance. If the individual readings are R1 and R2 then
UNBALANCE= (R1-R2) x 100
(R1+R2)
Testing Speed:Less than
0.75 seconds per each test. If there are 4 tests in a transformer it takes about
3 seconds or less after inserting the transformer into the test jig.
Data Sheet : CVCT-S20
Contact Information
- Telephone
- +91-40-27744445
- FAX
- +91-40-27744445
- Postal address
- 95, Road No. 6A, Jyothi Colony, Secunderabad - 500 015 (A.P), INDIA
- Electronic mail
Sales : ranga@vasavi.com
- Messenger
- MSN / Skype /Yahoo : vasavielectronics