APPENDIX A
PQMII POWER QUALITY METER – INSTRUCTION MANUAL A–3
• STEP 1(4) DROPOUT: When the three-phase kvar value becomes less than or equal to
the value set in this setpoint the output relay assigned to the
STEP will de-energize.
Since over compensation is possible, the dropout value can be set to negative vars.
• STEP 1(4) PICKUP DELAY: The
STEP will turn on after the delay set in this setpoint has
elapsed assuming all other conditions have been met.
Note
This delay setting will start counting down once the SYSTEM STABILIZATION TIME setting
has elapsed.
STEP 1(4) DISABLE TIME: When
STEP turns off, it is not allowed to turn back on until the
time set in this setpoint has elapsed. This allows the capacitors to discharge before
being re-energized again.
• SYSTEM STABILIZATION TIME: When any action is performed (turning
STEPS on/off or
low voltage is detected), the system must be allowed to stabilize for the time set in this
setpoint before any further actions can be performed. This time is necessary to allow
the system to stabilize without the capacitors trying to recharge
• LOW VOLTAGE LEVEL: When the system voltage (average three-phase voltage)
becomes equal to or less than this setpoint, all
STEPS are turned off. Upon recovery
(three-phase voltage is greater than this setpoint) the time set in the
SYSTEM
STABILIZATION TIME setpoint must have elapsed before any actions will be performed. If
this feature is not required, set it to “Off”.
• LOW VOLTAGE DETECT DELAY: In some cases where noise or spikes are present on
the line it may not be desirable to detect low voltage right away, therefore, this
setpoint can be used to delay the detection until voltage is definitely low.
• STEP PRIORITY: The
STEP PRIORITY setpoint determines the sequence the STEPS are
allowed to turn on in a case where the condition may be satisfied by more than one
STEP. Therefore, the STEP with the highest priority will be energized first. If the STEP
with highest priority is already energized, the
STEP with second highest priority will be
used, and so forth. The
STEP priority is set from highest to lowest (left to right) when
viewing this setpoint. For example, “1,2,3,4” signifies that
STEP 1 has the highest
priority and
STEP 4 has the lowest priority. Note that only one STEP is allowed to turn
on or off at a time.
Note
Enervista PQMII setup software does not support any MODs. The settings and metering
values under this MOD can be accessed using the unit front panel or the Modbus analyzer
tools.
A.1.3 Actual Values
The following messages have been added to the PQMII actual values structure to
accommodate this modification. The messages are located in actual values page
A2 STATUS ÖØ MOD 506 ACTUAL VALUES.
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