Vanguard LTCA-10_40 - Manual (Page 35)

LTCA-10/LTCA-40 USER’S MANUAL
35
5.7 Performing a Dynamic LTC Test
The Dynamic LTC Test is used to conduct a resistance test while the LTC or Regulator is
switching taps. The test time can be selected for a period from 15 to 240 seconds to allow the
LTC or Regulator enough time to switch through all of its taps during the test. The resistance
data is recorded continuously during the test period. The AC current probe can be clamped
around one of the motor leads to monitor the motor current during the test. Use the following
steps to perform a Dynamic LTC Test.
a. Start from the “START-UP” menu:
Press the
[1]
key (TEST XFMR) to start a test.
b. The following menu will be displayed:
Press the
[3]
key (DYNAMIC LTC TEST) to start a dynamic LTC test.
c. The following menu will be displayed:
Select the shot time by pressing the corresponding key on the LTCA-10/40’s keypad
(
[1]
,
[2]
,
[3]
,
[4]
, or
[5]
)
d. The “SELECT TEST CURRENT” menu will be displayed as shown below. The LTCA-
10 offers a selection of 5 or 10 Amps while the LTCA-10 offers a selection of 10 or 40
AMPS.
LTCA-10 LTCA-40
Select the test current by pressing the corresponding key on the LTCA-10/40’s keypad
(
[1]
or
[2]
).
SELECT TEST CURRENT:
1. 10 AMPS
2. 40 AMPS
SELECT TEST CURRENT:
1. 5 AMPS
2. 10 AMPS
SELECT SHOT TIME
1. 15 SECONDS
2. 30 SECONDS
3. 60 SECONDS
4. 120 SECONDS
5. 240 SECONDS
1. RESISTANCE TEST
2. SPECIAL RESISTANCE TEST
3. DYNAMIC LTC TEST
1. TEST XFMR 03/04/09
2. SETUP 09:28:03
3. USER DIAG