Instruction manual

PROTECTIVE FUNCTIONS
192
Measuring Points and Instruments
Item Measuring Point Measuring Instrument
Remarks
(Reference Measured Value) *
Power supply voltage V
1
Across R-S, S-T and T-R
Moving-iron type AC voltmeter
Commercial power supply
Within permissible AC voltage
fluctuation
Power supply side
current I
1
R, S and T line currents
Moving-iron type AC ammeter
Power supply side power
P
1
At R, S and T, and across R-S,
S-T and T-R
Electrodynamic type single-
phase wattmeter
P1
= W
11
+ W
12
+ W
13
(3-wattmeter method)
Power supply side power
factor Pf
1
Calculate after measuring power supply voltage, power supply side current and power supply side
power.
× 100%
3 V
1
× I
1
P
1
Pf
1
=
Output side voltage V
2
Across U-V, V-Wand W-U
Rectifier type AC voltmeter
(Note 1) (Not moving-iron type)
Difference between phases is
within ±1% of maximum output
voltage.
Output side current I
2
U, V and W line currents
Moving-iron type AC ammeter
(Note 3)
Current should be equal to or less
than rated inverter current.
Difference between phases is 10%
or lower.
Output side power P
2
At U, V and W, and across U-V
and V-W
Electrodynamic type single-
phase wattmeter
P
2
= W
21
+ W
22
2-wattmeter method
(or 3-wattmeter method)
Output side power factor
Pf
2
Calculate in similar manner to power supply side power factor.
× 100%
3 V
2
× I
2
P
2
Pf
2
=
Converter output Across P-N
Moving-coil type (such as
tester)
POWER lamp lit
1.35 × V
1
Maximum 923V during
regenerative operation
Across 2 (+) +5 0 to 5V/0 to 10VDC
Across 1 (+) +5 0 to ±5V/0 to ±10VDCFrequency setting signal
Across 4 (+) +5 4 to 20mADC
Across 10 (+) +5 5VDC
Frequency setting power
supply
Across 10E (+) +5 10VDC
“5” is
common.
Across FM (+) +SD
Approximately 5VDC at
maximum frequency
(without frequency meter)
8VDC
T1
T2
Pulse width T1:
Adjusted by Pr.900
Pulse cycle T2: Set by Pr.55
(Valid for frequency
monitoring only)
Frequency meter signal
Across AM (+) +5
Approximately 10VDC at
maximum frequency
(without frequency meter)
Start signal
Select signal
Across STF, STR, RH, RM, RL,
JOG, RT, AU, STOP, CS (+) +SD
Reset Across RES (+) +SD
Output stop Across MRS (+) +SD
Moving-coil type (Tester, etc.
may be used) (Internal
resistance: 50kΩ or larger)
20 to 30VDC when open.
ON voltage: 1V or less
SD is common.
Alarm signal
Across A-C
Across B-C
Moving-coil type
(such as tester)
Continuity check (Note 2)
<At OFF> <At ON>
Across A-C: Discontinuity Continuity
Across B-C: Continuity Discontinuity
Note 1. Accurate data will not be obtained by a tester.
2. When Pr. 195 "A, B, C terminal function selection" setting is positive logic.
3. When the carrier frequency exceeds 5kHz, do not use the instrument because overcurrent losses occurring in the metallic
parts inside the instrument will increase and may lead to burnout.
In this case, use an approximate effective value type instrument.