Mitsubishi Electric fr-e700 series, Инструкция по эксплуатации

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Maintenance and inspection Measurements on the main circuit
FR-E700 SC EC/ENE 8 - 13
Measuring Points and Instruments
햲
Use an FFT to measure the output voltage accurately. An FA tester or general measuring instru-
ment cannot measure accurately.
햳
When the carrier frequency exceeds 5 kHz, do not use this instrument since using it may increase
eddy-current losses produced in metal parts inside the instrument, leading to burnout. In this
case, use an approximate-effective value type.
햴
T/L3 is only for the three-phase power input specification models.
햵
A digital power meter (designed for inverter) can also be used to measure.
Item Measuring Point
Measuring
Instrument
Remarks (Reference Measurement Value)
Power supply
voltage V1 Across
R/L1-S/L2,
S/L2-T/L3,
T/L3-R/L1
햴
Moving-iron type AC
voltmeter
햵
Commercial power supply
Within permissible AC voltage fluctuation
(Refer to appendix A)
Power supply
side current I1 R/L1, S/L2, and T/L3
line currents
햴
Moving-iron type AC
ammeter
햵
—
Power supply
side power P1 R/L1, S/L2, T/L3
and R/L1-S/L2,
S/L2-T/L3,
T/L3-R/L1
햴
Digital power meter
(designed for
inverter) or electro-
dynamic type sin-
gle-phase
wattmeter P1 = W11 + W12 + W13 (3-wattmeter method)
Power supply
side power
factor Pf1 Calculate after measuring power supply voltage, power supply side current and power supply side
power.
Single-phase power supply
Three-phase power supply
Output side
voltage V2 Across U-V, V-W
and W-U Rectifier type AC
voltage meter
햲 햵
(Moving-iron type
cannot measure)
Difference between the phases is within ±1% of the
maximum output voltage
Output side cur-
rent I2 U, V and W line
currents Moving-iron type AC
ammeter
햳 햵
Difference between the phases is 10% or lower of the
rated inverter current.
Output side
power P2 U, V, W and U-V,
V-W
Digital power meter
(designed for
inverter) or electro-
dynamic type sin-
gle-phase
wattmeter P2 = W21 + W22
2-wattmeter method (or 3-wattmeter method)
Output side
power factor
Pf2 Calculate in similar manner to power supply side power factor.
Converter
output Across P/+ and N/ Moving-coil type
(such as tester) Inverter LED display is lit. 1.35 V1
Tab. 8-5: Measuring points and instruments of the main circuit
Pf1
P1
V1 I1
------------------ 100 % = Pf1
P1
3 V1 I1
--------------------------------- 100 % =
Pf2
P2
3 V2 I2
--------------------------------- 100% =