Vanguard WRM-40 - Manual (Page 45)

REV 3 WRM-10P AND WRM-40 USER’S MANUAL
41
3.7 Performing a Transient Test
The transient test verifies that a regulating switch in a Voltage Regulator or Load Tap Changer
changes contacts through its selection range without a break in the circuit. This is an important
test because in actual use, any break in current in a regulating tap switch generates large
reactive voltage spikes that are hazardous and exceed the switch’s voltage ratings, thus causing
irreparable damage.
By connecting the WRM continuity test input across the switching input and running the
regulator switch through all the contacts in its range, any breaks in continuity caused by faulty
tap switching can be detected. Please note that the transient test is applicable for the V1
channel only.
Use the steps below to perform a Transient Test:
a. Start from the “START-UP” menu:
Press the [2] key (SETUP).
b. The following screen will be displayed:
Press the
[4]
key (NEXT PAGE).
c. The following screen will be displayed:
Press the [3] key (TRANSIENT TEST).
d. The following warning screen will be displayed:
Press any key to continue.
********WARNING******
DANGEROUS FLASH-OVER
WILL OCCUR IF CABLES
ARE DISCONNECTED!
1. COMPUTER CONTROL
2. SET TIME
3. TRANSIENT TEST
1. ENTER XFMR ID
2. REVIEW RECORD
3. RESTORE RECORD
4. NEXT PAGE
1. TEST XFMR 11/02/09
2. SETUP 12:33:01
3. USER DIAG