Toshiba GR200 Series Instruction Manual page 1215

Metering in reactive power (Q)
(ii)
Similar to the active power (P), the user should set the metering sign for the reactive power
(Q). The Q value will have the minus sign (–) based on the P value, when Lag is set for setting
[Current] (Figure 9.2-4.a). On the other hand, the Q value will have the plus sign (+) based on
the P value, when Lead set for the setting (Figure 9.2-4.b).
II
(Q>0)
III
(Q<0)
a. Q (shown in quadrant IV) has a minus sign
because the Q is supplied by the outside source.
The decision is made with the P (shown in the
quadrant IV, defined with [Power]=Send) having
"a plus sign" when the current lags the voltage.
[Current]=Lag
Figure 9.2-4 Sign of the reactive power (Q) ruled by setting [Current]
Polarity setting for power factor values
9.2.5
The power factor (PF) value is shown by the rule to align the plus/minus sign (±) of the P value
(i.e., setting [PF_sign]=AP, default setting). However, the user can change the rule (i.e., setting
[PF_sign]=AP+RP); as a result, the PF value will have the plus sign (+), provided both the P
value and the Q value have the same plus (+) sign or minus (–) sign.
AP setting
(i)
When the sign of the PF value is required to match with the sign of the P value, set AP for the
setting [PF_sign].
I
(Q>0)
V
IV
I
(Q<0)
b. Q (shown in quadrant IV) has a plus sign because
- 1192 -
II
(Q<0)
III
I
(Q>0)
the Q is absorbed by the outside source. The
decision is based on the P (shown in the
quadrant I, defined with [Power]=Receive)
having "a minus sign" when the current leads
the voltage.
[Current]=Lead
6F2S1914 (0.49)
I
(Q<0)
V
IV
(Q>0)
GRL200 (Soft 033 & 037)