Toshiba GR200 Series Instruction Manual page 1068

Metering items
Voltage (V)
Current (I)
Active power (P)
Reactive power (Q)
Apprent power (S)
Diminishing a very small value to display zero
9.2.3
In the metering function, negligible metering values will be considered as zero. The user can
set the level to diminish in % using settings [I-Valid Level] and [V-Valid Level], at which values
'4.00' and '0.30' are set, as default, respectively. Thus, zero (0) will be displayed when the
applied quantities at the VCT, which are lesser than the setting levels.
Flow settings for active/reactive/apparent powers
9.2.4
The user should set the rules for the metering P, Q, and S
Metering in active power (P)
(i)
When the metering function measures the value for supplying power, the user should set Send
for the [Power]. Conversely, if the metering function should operate for absorbing power, set
Receive for the setting. Figure 9.2-3 illustrates the sign of the active power (P), which is
polarized with the voltage (V). In Figure 9.2-3.a exemplifies the metering function operating
for the supplying power so that the value P will have plus (+) sign (i.e., the I lags the V, which
shown in Quadrant IV). In Figure 9.2-3.b, the value P will have minus (–) sign when the I lags
the V, provided Receive is set for the setting.
Receiving
II
(P<0)
III
(P<0)
a. Metering (P) for supplying power
[Power]=Send
Figure 9.2-3 Sign of the active power (P) ruled by setting [Power]
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
Table 9.2-3 Selection of units to display
Settings
[V-Display Unit]
[I-Display Unit]
[P-Display Unit]
[Q-Display Unit]
[S-Display Unit]
Sending
I
(P>0)
V
IV
I
(P>0)
- 1047 -
Selection of a unit to display
Volt (V) or kilo-volt (kV)
Ampare (A) or kilo-ampare (kA)
Kilo-watt (kW) or Mega-watt (MW)
Kilo-var (kvar) or Mega-var (Mvar)
Kilo-VA (kVA) or Mega-VA (MVA)
Receiving
II
(P>0)
III
I
(P>0)
b. Metering (P) for absorbing power
[Power]=Receive
6F2S1915 (0.46)
Sending
I
(P<0)
V (+)
IV
(P<0)
GRZ200 (Soft 031 & 032)