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1BPROTECTION FUNCTIONS
PROTECTION, CONTROL AND METERING FUNCTIONS
2.1.12.2. FREQUENCY LEVELS
2.1.12.2.1. GENERAL DESCRIPTION
The nominal frequency of the power system is used as a reference level. For a
given step if a pickup value is selected that is lower than the nominal system
frequency it will activate when the actual frequency is equal to or lower than the
selected pickup value for a period of time equal to or greater than the present
value.
If the pickup value is selected above the system`s nominal frequency the element
will activate when the actual frequency is equal to or greater than the selected
pickup value for a period of time equal to or greater than the present value.
A hysteresis level can be used to avoid unnecessary pickups of the function.
Two general configurations are available to activate this function:
1. Simple function operation. Using this feature, unchecking the checkbox, the
function does not supervise the status of breaker neither the current flow in the
phases.
2. Including breaker supervision. Checking the checkbox, the function is only
activated when the breaker or current flow in phases is detected.
Note. For further details configuring this function, please refer to 3.4.1.10 section in
this manual.
Figure 2-27 shows the logical diagram for the low frequency function 81U
2.1.12.2.2. SETTINGS (6 GROUPS)
The settings for these functions are shown in the Table 2-17
Setting
Minimum
Maximum
Step
Notes
Enable
YES/NO
Summary of Contents for smART P500
Page 1: ...Instruction Manual Multifunction Protection Relay smART P500...
Page 23: ...2BTABLES INDEX THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY...
Page 39: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 9 Wye Wye Connection measured neutral...
Page 40: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 10 Wye Wye Connection sensitive neutral...
Page 41: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 11 Open Delta Connection measured neutral...
Page 42: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 12 Open Delta Connection sensitive neutral...
Page 511: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 6 Moderately ANSI curve...
Page 513: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 7 Very inverse ANSI curve...
Page 515: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 8 Extremely inverse ANSI curve...
Page 532: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 14 Recloser Curves 101 119...
Page 535: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 15 Recloser Curves 120 142...
Page 538: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 16 Recloser Curves 151 202...