Mitsubishi Electric MDU-BN Instruction Manual page 20

(2) Voltage
[1] The present value is the effective value during a single cycle.
[2] " Between each line " means the between phases, such as between 1-phase and 2-phase, 2-phase and 3-phase, 3-phase and 1-phase,
1-phase and N-phase, 2-phase and N-phase, and 3-phase and N-phase.
[3] Totals (average value) are calculated as follows when setting the phase wire type. (Factory setting is three-phase three-wire for three-pole
products, and three-phase four-wire for four-pole products.)
The maximum value between all wires indicates the maximum value of the following interphases via setting the phase and wire.
Line system
Single-phase 2-wire
Single-phase 3-wire
Three-phase 3-wire
Three-phase 4-wire
[4] The maximum value between all wires indicates the maximum value of all line voltages, from when usage began (after previous reset) to now.
[5] The voltage measurement rated value, measurement range, and measurement accuracy are shown below.
Measurement rated voltage
Accuracy
Measurement lower limit voltage
Measurement upper limit voltage
[6] Display/communication values will be as follows in the following conditions.
Less than 22 V
Measurement upper limit voltage
exceeded
(3) Electric power/Reactive power
[1] The present value is the effective value during a single cycle. (The electric power during reverse power flow is also measured.)
[2] The demand time limit is a bulk setting value that includes other measurement elements. (Factory setting is two min.)
Item
Demand time limit
[3] The measurement rated electric power/reactive power, measurement range, and measurement accuracy are shown below.
Measurement rated electric power
Measurement rated reactive power
Electric power accuracy
Reactive power accuracy
Measurement upper limit
Measurement lower limit
[4] Display/communication values will be as follows in the following conditions.
All I are less than 0.4% of In
All V are 0 V (less than 22 V)
Less than measurement lower limit
electric power/reactive power
Measurement upper limit
electric power/reactive power exceeded
Note: The display value will also blink if either the load current or line voltage reaches the measurement upper limit value.
Voltage total present value
V23
(V12 + V23) / 2
(V12 + V23 + V31) / 3
440 V
± 4.4 V ( ± 1.0% of measurement rated voltage)
80 V (displays up to 22 V, but anything less than 80 V is a reference value)
759 V
Display
0 V
Blinks at 759 V
Setting value
0 to 15 min. (per 1 min.)
√ 3 × In × 440 V
Measurement rated electric power ± 1.5%
Measurement rated reactive power ± 2.5%
Rated current In (A)
Measurement upper limit electric power
Measurement lower limit electric power
Measurement upper limit reactive power
Measurement lower limit reactive power
● If either the load current or line voltage exceeds the measurement upper limit, this will be the upper
limit (lower limit) even if at or below the electric power/reactive power listed above.
Display
0 kW / 0 kvar
Blinks at measurement lower limit
electric power/reactive power
Blinks at measurement upper limit
electric power/reactive power
19
Maximum phase applicable phase
V23
V12, V23
V12, V23, V31
Communication
Fixed at 759 V
250 400 630
657.3 kW 1,052 kW 1,656 kW
-657.3 kW -1,052 kW -1,656 kW
657.3 kvar 1,052 kvar 1,656 kvar
-657.3 kvar -1,052 kvar -1,656 kvar
Communication
Fixed at Measurement lower limit
electric power/reactive power
Fixed at measurement upper limit
electric power/reactive power
800
2,103 kW
-2,103 kW
2,103 kvar
-2,103 kvar