Mitsubishi Electronics FR-A500L instruction manual Measuring Points and Instruments

PROTECTIVE FUNCTIONS

Measuring Points and Instruments

Remarks

Item

Measuring Point

Measuring Instrument

(Reference Measured Value)

＊

Power supply voltage

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

Commercial power supply

Moving-iron type AC voltmeter

Within permissible

AC

voltage

V1

<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

S-T and T-R

Electrodynamic type single-

P1 = W11 + W12 + W13

power P1

<At L1, L2 and L3, and across

phase wattmeter

(3-wattmeter method)

L1-L2, L2-L3and L3-L1>

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

Power supply side

power.

power factor Pf 1

P1

Pf1 =

3 V 1

× 100%

・ I1

Rectifier type AC voltmeter

Difference between phases is

Output side voltage V2

Across U-V, V-Wand W-U

(Note 1) (Not moving-iron

within ±1% of maximum output

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

Calculate in similar manner to power supply side power factor.

P2

factor Pf 2

Pf2 =

3 V 2

× 100%

・ 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

Across 10 (+) −5

5VDC

Frequency setting signal

Across 1 (+) −5

0 to ±5V/0 to ±10VDC

Across 4 (+) −5

4 to 20mADC

power supply

Across 10E (+) −5

10VDC

Approximately. 5VDC at

maximum frequency

(without frequency meter)

T1

DC8V

Across FM (+) −SD

Moving-coil type (Tester, etc.

Frequency meter signal

may be used) (Internal

T2

common.

resistance: 50kΩ or larger)

Pulse cycle T2: Set by Pr.55

Pulse width T1:

Adjusted by Pr.900

(Valid for

is

SD

frequency

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.

Reset

Across RES (+) −SD

ON voltage: 1V or less

Output stop

Across MRS (+) −SD

Continuity check (Note 2)

Across A-C

Moving-coil type

<At OFF>

<At ON>

Alarm signal

Across A-C: Discontinuity Continuity

Across B-C

(such as tester)

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