Siemens Solkor 7PG2113 Technical Manual page 234

ANSI Reset
If the element is configured as an ANSI characteristic, it may have a reset delay applied. If ANSI reset is selected
for an IEC characteristic element, the reset will be instantaneous.
ANSI reset times from operated condition to fully reset are as follows for zero applied current and TM = 1.0. The
reset curve characteristic type and TM is defined by the operating characteristic.
Curve
ANSI-MI
ANSI-VI
ANSI-EI
Apply current in the following sequence, a) 2x setting for a time to ensure element operation, b) Zero current for
the reset time above (xTM), c) 2x setting for a time to ensure element operation. Check that the second operation
(c) is similar to the first (a) and in line with the expected operate time for the element at this current level.
Repeat the test with the reset time (b) reduced to 50% of the previous value. Ensure that the second operate time
(c) is 50% of the first (a) operate time.
Operate Reset time
time (calculated)
(expected)
Check correct indication, trip output, alarm contacts, waveform record.
©2012 Siemens Protection Devices Limited
Fully operated to reset with Zero current applied & TM=1 (secs)
Table 2.7-6 Standard ResetTiming
Operate time 50% Reset
(measured) Time
(calculated)
First test (c)
Table 2.7-7 Reset Results
7PG2113/4/5/6 Commissioning & Maintenance
4.85
21.6
29.1
50% operate 50% operate time
time
(calculated)
Chapter 6 Page 36 of 77
(measured)
Second Test (c)