Mitsubishi Electronics FR-A500L Measuring Point Measuring Instrument, 10VDC, 5VDC

PROTECTIVE FUNCTIONS

Measuring Points and Instruments

Item

Measuring Point

Measuring Instrument

Remarks

(Reference Measured Value) ＊

Across R-S, S-T and T-R

Commercial power supply

Power supply voltage V1

Moving-iron type AC voltmeter

Within

permissible

AC voltage

<Across L1-L2, L2-L3and L3-L1>

fluctuation（Refer to Page 40）

Power supply side

R, S and T line currents

Moving-iron type AC ammeter

current I1

<L1, L2, and L3 line currents>

At R, S and T, and across R-S,

Power supply side power

S-T and T-R

Electrodynamic type single-

P1 = W11 +

W12 + W13

P1

<At L1, L2 and L3, and across L1-

phase wattmeter

(3-wattmeter method)

L2, L2-L3and L3-L1>

Power supply side power

Calculate after measuring power supply voltage, power supply side current and power supply side power.

P1

factor Pf1

×

100%

Pf1 = 3 V1 ・ I1

Rectifier type AC voltmeter

Difference between phases is

Output side voltage V2

Across U-V, V-Wand W-U

within ± 1% of maximum output

(Note 1) (Not moving-iron type)

voltage.

Current should be equal to or less

Output side current I2

U, V and W line currents

Moving-iron type AC ammeter

than rated inverter current.

Difference between phases is 10%

or lower.

At U, V and W, and across U-V

Electrodynamic type single-

P2 = W21 +

W22

Output side power P2

2-wattmeter method (or 3-

and V-W

phase wattmeter

wattmeter method)

Output side power factor

Calculate in similar manner to power supply side power factor.

P2

Pf2

×

100%

Pf2 = 3 V2 ・ I2

POWER lamp lit

Converter output

Across P-N< Across + and - >

Moving-coil type (such as

1.35 ×

V1

tester)

Maximum 760V during

regenerative operation

+

−

Across 2 ( )

5

0 to 5V/0 to 10VDC

“5”is common.

Frequency setting power

+

−

−

±

±

+

Frequency setting signal

Across 1 ( )

5

0 to

5V/0 to

10VDC

+

−

Across 4 ( )

5

4 to 20mADC

Across 10 ( )

5

5VDC

supply

+

−

Across 10E ( )

5

10VDC

Approximately. 5VDC at

maximum frequency

(without frequency meter)

T1

+

−

DC8V

Moving-coil type (Tester, etc.

Across FM (

)

SD

Frequency meter signal

may be used) (Internal

T2

common.

resistance: 50kΩ or larger)

Pulse width T1:

Adjusted by Pr.900

Pulse cycle T2: Set by Pr.55

is

(Valid for frequency

SD

monitoring only)

+

−

Approximately 10DVC at

Across AM ( )

5

maximum frequency

(without frequency meter)

Start signal

Across STF, STR, RH, RM, RL,

Select signal

RT, AU, STOP, CS ( )

−

SD

20 to 30VDC when open.

+

+

−

ON voltage: 1V or less

Reset

Across RES ( )

SD

+

−

Output stop

Across MRS ( )

SD

Across A-C

Moving-coil type

Continuity check (Note 2)

Alarm signal

<At OFF>

<At ON>

Across B-C

(such as tester)

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.

40