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6BPOWER QUALITY
PROTECTION, CONTROL AND METERING FUNCTIONS
2.6. POWER QUALITY
The proART has the ability to register a set of parameters that characterize the power
quality.
Up to 100 registers for each parameter can be stored in the internal memory. Once the
maximum number of registers is reached, the occurrence of a new event will be stored at
the expense of the oldest register thus keeping in memory only the 100 newest events.
2.6.1. VOLTAGE SAGS
The voltage sags are a short-term decrease in voltage lasting anywhere from
milliseconds up to a few seconds. The relay has the ability to detect such events using a
user defined set of parameters. The parameters include the voltage levels and the
maximum and minimum times of event duration. The relay records the following
information regarding such events:
Sag counter:
Indicates the number of this kind of events that have been detected
including the present one. This counter has a maximum limit of 100 after which it
changes to zero.
Date and time:
Date and time when the event was detected.
Event duration:
Time span of the event.
Involved phases:
Information about the phases where the event was detected.
Voltages of the three phases:
Stores the minimum value of the voltage for each
of the phases while the event was present.
Current of the three phases:
Stores the value of the current for each of the
phases at the exact moment when the minimum value of voltage occurred.
Classification:
Classification of the sag according to a nominal scale.
2.6.2. VOLTAGE SWELLS
Voltage swells are increases in voltage lasting anywhere from milliseconds up to a few
seconds. The relay has the ability to detect such events using a user defined set of
parameters. The parameters include the voltage levels and the maximum and minimum
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...