RFL 9300 RFL Electronics Inc.
January 30, 2002 6-65 (973) 334-3100
6.7.3.1 SETTING THE PHASE TIME OVERCURRENT PARAMETERS
The operator must enter the following parameters in programming mode:
1. Parameter #30 PH TOC set to ENABLE.
2. Parameter #31 P PICKUP set to the pickup value.
3. Parameter #32 PH CURVE set to selected curve.
4. Parameter #33 PH DIAL set to desired time dial setting.
The range of pickup values is 0.5 amps to 31.875 amps in 0.125 amp steps.
The operator may select from eight curves arranged in two groups.
There are 4 USA curves and 4 IEC curves.
USA CURVES IEC CURVES
USA1 - Moderately Inverse IEC1 - Standard Inverse
USA2 - Inverse IEC2 - Very Inverse
USA3 - Very Inverse IEC3 - Extremely Inverse
USA4 - Extremely Inverse IEC4 - Long Time Backup
Each curve can have one of eleven different time dial settings.
The time dial settings available for the USA curves are: 0.5, 1, 2 , 3, 4, 5, 6, 8, 10, 12 and 15.
The time dial settings available for the IEC curves are: 0.05, 0.1, 0.2 , 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 .
Note that the reset function for this trip algorithm is instantaneous. The reset time is not programmable by the
operator.
6.7.3.2 SETTING THE GROUND TIME OVERCURRENT PARAMETERS
The operator must enter the following parameters in programming mode:
1. Parameter #34 GND TOC set to ENABLE
2. Parameter #35 G PICKUP set to the pickup value.
3. Parameter #36 GND CURVE set to selected curve.
4. Parameter #37 GND DIAL set to desired time dial setting.
The range of pickup values is 0.5 amps to 31 amps in 0.125 amp steps.
The operator may select from eight curves arranged in two groups.
There are 4 USA curves and 4 IEC curves.
USA CURVES IEC CURVES
USA1 - Moderately Inverse IEC1 - Standard Inverse
USA2 - Inverse IEC2 - Very Inverse
USA3 - Very Inverse IEC3 - Extremely Inverse
USA4 - Extremely Inverse IEC4 - Long Time Backup
Each curve can have one of eleven different time dial settings.
The time dial settings available for the USA curves are: 0.5, 1, 2 , 3, 4, 5, 6, 8, 10, 12 and 15.
The time dial settings available for the IEC curves are: 0.05, 0.1, 0.2 , 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 .
Note that the reset function for this trip algorithm is instantaneous. The reset time is not programmable by the
operator.
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