Vanguard DigiTMR - Manual (Page 29)

REV 3 DIGITMR USER’S MANUAL
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3.5.2. Timing an OPEN Operation WITH Insertion Resistors
The DigiTMR can time breakers with insertion resistors. The insertion resistor can range from 10
to 7,000 Ohms. Any insertion resistor greater than 7,000 Ohms is detected as an open circuit.
When a breaker with insertion resistors is timed, the timing window results show the main
contact timing and the insertion resistor contact timing. The graphic reports also show the main
and the resistor contact activities on each of the channels. To time an OPEN operation with
insertion resistors:
a. Start from the “START-UP” menu:
Press the [1] key (TIME BRKR) to start a test.
b. The following screen will be displayed:
Press the
[2]
key (YES).
c. The following screen will be displayed:
Select the resistor value by pressing the corresponding key ( [1] , [2] , or [3] ).
d. The following screen will be displayed:
Press the
[1]
key (WINDOW = 1 SEC) to select the 1-second timing window.
TIMING WINDOW:
1. WINDOW = 1 SEC
2. WINDOW = 10 SEC
3. WINDOW = 20 SEC
RESISTOR VALUE:
1. LESS THAN 1000 OHM
2. 1000 TO 2000 OHM
3. MORE THAN 2000 OHM
INSERTION RESISTOR?
1. NO
2. YES
1. TIME BRKR 04/17/09
2. GET RSLT 10:49:23
3. SET-UP
4. DIAGNOSTICS