DOC. MIE11110 Rev. 5
Page 19 of 110
600 V input. The choice is performed considering the test current
IP and the VA rating. Given:
. KCT = CT ratio;
. IP = primary test current;
. VA = VA rating,
compute:
IS = IP / KCT
VS = VA / IS
If VS < 10 V, connect to the 10 V input, that has a better
resolution; else, connect to the 600 V input.
Now, input in the screen:
. The primary and secondary current;
. The secondary current metering method: if the current clamp is
enabled, the clamp’s ratio (1000 to 1 for our option);
. The secondary voltage measurement input.
BEFORE STARTING THE TEST, VERIFY THAT THE SECONDARY
CIRCUIT IS CLOSED: THE CT GENERATES HIGH VOLTAGE IF
THE PRIMARY CURRENT IS INJECTED AND THE SECONDARY IS
OPEN!
Press test start button (56), and adjust the primary current to the
desired value by the adjustment knob (6). There are two tabs to
select the measurement of ratio and polarity or burden. With the
selection RATIO, the screen shows:
. The primary current;
. The secondary current;
. The transformer’s ratio;
. The ratio percentage error with respect to the nominal;
. The polarity, as OK or KO. You will notice that the % error does
not change very much as a function of the test current.
Now select the BURDEN tap: the following screen is displayed.
Summary of Contents for T2000
Page 1: ...DATE 18 11 2009 DOC MIE11110 REV 5 T 2000 APPLICATION GUIDE ...
Page 45: ...DOC MIE11110 Rev 5 Page 45 of 110 ...
Page 81: ...DOC MIE11110 Rev 5 Page 81 of 110 2 Selection time about 30 ms LTC fails ...
Page 83: ...DOC MIE11110 Rev 5 Page 83 of 110 4 Same LTC as above fault on this selection ...
Page 91: ...DOC MIE11110 Rev 5 Page 91 of 110 The connection diagram is the following ...
