NHP Terasaki TemBreak PRO P SE Series, Руководство пользователя

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Measurements and settings
Power Related Measurements
57
TemBreak PRO
P_SE-UM-001-EN
– V1.2.0
Power flow direction and quadrant
The P_SE MCCB power supply can be fed in either forward or reverse direction to allow for varied applications and physical installation requirements.
Power measurement values are denoted by positive or negative in accordance with the power sign polarity. To ensure accuracy of measurements and other
calculated values (such as energy and quadrant), the P_SE OCR must be configured with the correct power flow direction, which reflects the physical
direction of supply.
Changes to the power flow direction can be made using one or a combination of the below methods:
- TPED
- TPCM
TPED setting TPCM setting Default
“P sign convention”
Plus: Forward/normal supply
Minus: Reverse supply
Command ID: 103 “ Power flow direction ”
Hex 00 00: Forward/normal supply
Hex 00 01: Reverse supply
Forward/normal supply
When represented on the power quadrant display, the power flow direction setting ensures that accurate power signs are shown, i.e. positive (+) and
negative (−) signs :
-
Positive active power (+P) is shown when power and energy is delivered to the load, i.e. the downstream circuit is consuming power.
-
Negative active power (-P) is shown when power and energy is received from the load, i.e. the downstream circuit is generating power.
-
Reactive power (Q) follows the active power (P) sign when current lags behind voltage, i.e. when the downstream circuit is inductive.
-
Reactive power (Q) is opposite the active power (P) sign when current leads ahead of voltage, i.e. when the downstream circuit is capacitive.
Positive (+)
Forward/Normal
Supply
Negative (−)
Reverse Supply
-P
+P
+Q
-Q
Quadrant II
Capacitive
Active power (−P)
Reactive power (+Q)
Quadrant I
Inductive
Active power (+P)
Reactive power (+Q)
Quadrant III
Inductive
Active power (−P)
Reactive power (−Q)
Quadrant IV
Capacitive
Active power (+P)
Reactive power (−Q)