CHAPTER 4: PROGRAMMING
S4 ALARMS/CONTROL
PQM POWER QUALITY METER – INSTRUCTION MANUAL
4–45
4.5.2
Total
Harmonic
Distortion
FIGURE 4–25: Setpoints Page 4: Alarms/Control / Total Harmonic Distortion
•
AVERAGE CURRENT THD RELAY:
Excessive phase current THD detection can either be
disabled, used as an alarm, or as a process control. Set this setpoint to
OFF
if the
feature is not required. Selecting alarm relay will cause the alarm relay to activate and
display an alarm message whenever an excessive average current THD condition
exists. Selecting auxiliary relay will cause the auxiliary relay to activate, but no
message will be displayed. This is intended for process control.
•
AVERAGE CURRENT THD LEVEL:
When the measured average current THD exceeds
this setpoint value, an average current THD condition occurs.
•
AVERAGE CURRENT THD DELAY:
If the average current THD exceeds the
AVERAGE
CURRENT THD LEVEL
for the time delay programmed in this setpoint, an average
current THD condition occurs.
•
AVERAGE VOLTAGE THD RELAY
: Average voltage THD detection can either be
disabled, used as an alarm or as a process control. Set this setpoint to off if the feature
is not required. Selecting alarm relay will cause the alarm relay to activate and display
an alarm message whenever an average voltage THD condition exists. Selecting
auxiliary relay will cause the auxiliary relay to activate, but no message will be
displayed. This is intended for process control.
•
AVERAGE VOLTAGE THD LEVEL:
When the measured average voltage THD equals or
exceeds this setpoint value, an AVERAGE VOLTAGE THD condition occurs.
•
AVERAGE VOLTAGE THD DELAY:
If the average voltage THD equals or exceeds the
AVERAGE VOLTAGE THD LEVEL
setpoint value and remains this way for the time
delay programmed in this setpoint, an AVERAGE VOLTAGE THD condition will occur.
]] SETPOINTS
]] S4 ALARMS/CONTROL
] TOTAL HARMONIC
] DISTORTION
AVERAGE CURRENT THD
RELAY: OFF
AVERAGE CURRENT THD
LEVEL
t
10.0 %
AVERAGE CURRENT THD
DELAY: 10.0 s
]] SETPOINTS
]] S5 TESTING
SETPOINT
Range: ALARM, AUX1, AUX2, AUX3, OFF
Range: 0.5 to 100.0; Step 0.5%
AVERAGE VOLTAGE THD
RELAY: OFF
AVERAGE VOLTAGE THD
LEVEL
t
10.0%
AVERAGE VOLTAGE THD
DELAY: 10.0 s
] CURRENT/VOLTAGE
]
Range: 0.5 to 600.0; Step 0.5 s
Range: ALARM, AUX1, AUX2,
AUX3, OFF
Range: 0.5 to 100.0; Step 0.5%
Range: 0.5 to 600.0; Step 0.5 s
MESSAGE
MESSAGE
MESSAGE
Содержание Multilin PQM
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