Mitsubishi FR-S520E-0.1K, FR-S540E-0.4K, FR-S510WE-0.1K Instruction Manual

TRANSISTORIZED INVERTER

FR-S500

INSTRUCTION MANUAL (Detailed)

FR-S

500E

-NA

TRANSISTORIZED INVERTER INSTRUCTION MANUAL (Detailed)

SIMPLE INVERTER

FR-S520E-0.1K to 3.7K-NA
FR-S540E-0.4K to 3.7K-NA
FR-S510WE-0.1K to 0.75K-NA

Thank you for choosing this Mitsubishi Transistorized inverter.
This instruction manual (detailed) provides instructions for advanced use of the FR­S500 series inverters.
Incorrect handling might cause an unexpected fault. Before using the inverter, always
read this instruction manual and the instruction manual (basic) [IB-0600210ENG]
packed with the product carefully to use the equipment to its optimum.

This section is specifically about safety matters

Do not attempt to install, operate, maintain or inspect the inverter until you have read
through this instruction manual (basic) and appended documents carefully and can
use the equipment correctly. Do not use the inverter until you have a full knowledge
of the equipment, safety information and instructions.
In this instruction manual (detailed), the safety instruction levels are classified into

"WARNING" and "CAUTION".

WARNING

CAUTION

Note that even the level may lead to a serious consequence
according to conditions. Please follow the instructions of both levels because they are

important to personnel safety.

Assumes that incorrect handling may cause hazardous
conditions, resulting in death or severe injury.

Assumes that incorrect handling may cause hazardous
conditions, resulting in medium or slight injury, or may cause
physical damage only.

CAUTION

1. Electric Shock Prevention

WARNING

 While power is on or when the inverter is running, do not open the front cover. You

may get an electric shock.

 Do not run the inverter with the front cover or wiring cover removed. Otherwise,

you may access the exposed high-voltage terminals or the charging part of the
circuitry and get an electric shock. Also, the inverter's ability to withstand
earthquakes will deteriorate.

 Even if power is off, do not remove the front cover except for wiring or periodic

inspection. You may access the charged inverter circuits and get an electric shock.

 Before starting wiring or inspection, check to make sure that the 3-digit LED inverter

monitor is off, wait for at least 10 minutes after the power supply has been switched
off, and check to make sure that there are no residual voltage using a tester or the
like.

 This inverter must be grounded. Grounding must conform to the requirements of

national and local safety regulations and electrical codes. (JIS, NEC section 250,
IEC 536 class 1 and other applicable standards)

 Any person who is involved in the wiring or inspection of this equipment should be

fully competent to do the work.

 Always install the inverter before wiring. Otherwise, you may get an electric shock

or be injured.

 Perform setting dial and key operations with dry hands to prevent an electric

shock.

 Do not subject the cables to scratches, excessive stress, heavy loads or pinching.

Otherwise, you may get an electric shock.

 Do not change the cooling fan while power is on. It is dangerous to change the

cooling fan while power is on.

 When you have removed the front cover, do not touch the connector above the 3-

digit monitor LED display. Otherwise, you get an electrick shock.

A-1

2. Fire Prevention

CAUTION

 Mount the inverter on an incombustible surface. Installing the inverter directly on or near

a combustible surface could lead to a fire.

 If the inverter has become faulty, switch off the inverter power. A continuous flow of

large current could cause a fire.

 Do not connect a resistor directly to the DC terminals P, N. This could cause a fire.

3. Injury Prevention

CAUTION

 Apply only the voltage specified in the instruction manual to each terminal to

prevent damage, etc.

 Always connect to the correct terminal to prevent damage, etc.
 Always make sure that polarity is correct to prevent damage, etc.
 While power is on or for some time after power-off, do not touch the inverter as it is

hot and you may get burnt.

4. Additional Instructions

Also note the following points to prevent an accidental failure, injury, electric shock,
etc.

(1) Transportation and installation

CAUTION

 When carrying products, use correct lifting gear to prevent injury.
 Do not stack the inverter boxes higher than the number recommended.
 Ensure that installation position and material can withstand the weight of the

inverter. Install according to the information in the instruction manual.

 Do not install or operate if the inverter is damaged or has parts missing.
 When carrying the inverter, do not hold it by the front cover or setting dial; it may

fall off or fail.

 Do not stand or rest heavy objects on the inverter.
 Check the inverter mounting orientation is correct.
 Prevent other conductive bodies as screws and metal fragments or other

flammable substance as oil from entering the inverter.

 As the inverter is a precision instrument, do not drop or subject it to impact.
 Use the inverter under the following environmental conditions: This could cause

the inverter damage.

Ambient
Temperature

Ambient humidity 90%RH maximum (non-condensing)
Storage

temperature

Atmosphere

Environment

Altitude/
vibration

-10°C to +50°C (14°F to 122°F) (non-freezing)

-20°C to +65°C (-4°F to 149°F) *

Indoors (free from corrosive gas, flammable gas, oil mist,
dust and dirt)

2

Max.1000m (3280.80 feet) above sea level 5.9m/s
(conforming to JIS C 60068-2-6)

or less

*Temperatures applicable for a short time, e.g. in transit.

A-2

(2) Wiring

CAUTION

 Do not fit capacitive equipment such as power factor correction capacitor, radio

noise filter (option FR-BIF(-H)) or surge suppressor to the output of the inverter.

 The connection orientation of the output cables U, V, W to the motor will affect the

direction of rotation of the motor.

(3) Trial run

CAUTION

 Check all parameters, and ensure that the machine will not be damaged by a

sudden start-up.

 When the load GD

output current may vary when the output frequency is in the 20Hz to 30Hz range.
If this is a problem, set the Pr.72 "PWM frequency selection" to 6kHz or higher.
(When setting the PWM to a higher frequency, check for noise or leakage current
problem and take countermeasures against it.)

(4) Operation

2

is small (at the motor GD or smaller) for 400V from 1.5K to 3.7K, the

WARNING

 When you have chosen the retry function, stay away from the equipment as it will

restart suddenly after an alarm stop.

 The [STOP] key is valid only when the appropriate function setting has been made.

Prepare an emergency stop switch separately.

 Make sure that the start signal is off before resetting the inverter alarm. A failure to

do so may restart the motor suddenly.

 The load used should be a three-phase induction motor only. Connection of any

other electrical equipment to the inverter output may damage the equipment.

 Do not modify the equipment.
 Do not perform parts removal which is not instructed in this manual. Doing so may

lead to fault or damage of the inverter.

A-3

CAUTION

 The electronic thermal relay function does not guarantee protection of the motor

from overheating.

 Do not use a magnetic contactor on the inverter input for frequent starting/stopping

of the inverter.

 Use a noise filter to reduce the effect of electromagnetic interference. Otherwise

nearby electronic equipment may be affected.

 Take measures to suppress harmonics. Otherwise power supply harmonics from

the inverter may heat/damage the power capacitor and generator.

 When a 400V class motor is inverter-driven, please use an insulation-enhanced

motor or measures taken to suppress surge voltages. Surge voltages attributable to
the wiring constants may occur at the motor terminals, deteriorating the insulation of
the motor.

 When parameter clear or all clear is performed, reset the required parameters

before starting operations. Each parameter returns to the factory setting.

 The inverter can be easily set for high-speed operation. Before changing its

setting, fully examine the performances of the motor and machine.

 In addition to the inverter's holding function, install a holding device to ensure safety.
 Before running an inverter which had been stored for a long period, always

perform inspection and test operation.

(5) Emergency stop

CAUTION

 Provide a safety backup such as an emergency brake which will prevent the

machine and equipment from hazardous conditions if the inverter fails.

 When the breaker on the inverter primary side trips, check for the wiring fault (short

circuit), damage to internal parts of the inverter, etc. Identify the cause of the trip,
then remove the cause and power on the breaker.

 When any protective function is activated, take the appropriate corrective action,

then reset the inverter, and resume operation.

(6) Maintenance, inspection and parts replacement

CAUTION

 Do not carry out a megger (insulation resistance) test on the control circuit of the

inverter.

(7) Disposing of the inverter

CAUTION

 Treat as industrial waste.

(8) General instructions

Many of the diagrams and drawings in this instruction manual (detailed) show the inverter
without a cover, or partially open. Never operate the inverter in this manner. Always replace
the cover and follow this instruction manual (detailed) when operating the inverter.

A-4

CONTENTS

1. WIRING 1

1.1 Standard connection diagram and terminal specifications ..2

1.1.1 Standard connection diagram ....................................................................... 2

1.1.2 Explanation of main circuit terminals............................................................. 3

1.2 Main circuit terminals ...............................................................6

1.2.1 Terminal block layout ....................................................................................6

1.2.2 Cables, wiring length, and crimping terminals............................................... 8

1.2.3 Wiring instructions ......................................................................................... 9

1.2.4 Selection of peripheral devices ...................................................................10

1.2.5 Leakage current and installation of ground leakage circuit breaker............ 12

1.2.6 Power-off and magnetic contactor (MC)...................................................... 16

1.2.7 Regarding the installation of the power factor improving reactor ................ 17

1.2.8 Regarding noise and the installation of a noise filter................................... 18

1.2.9 Grounding precautions................................................................................ 19

1.2.10 Power supply harmonics .............................................................................20

1.2.11 Inverter-driven 400V class motor ................................................................ 21

1.3 How to use the control circuit terminals ...............................22

1.3.1 Terminal block layout ..................................................................................22

1.3.2 Wiring instructions ....................................................................................... 22

CONTENTS

1.3.3 Changing the control logic........................................................................... 23

1.4 Input terminals.........................................................................25

1.4.1 Run (start) and stop (STF, STR, STOP) .....................................................25

1.4.2 Connection of frequency setting potentiometer and

output frequency meter (10, 2, 5, 4, AU).....................................................28

1.4.3 External frequency selection (REX, RH, RM, RL)....................................... 29

1.4.4 Indicator connection and adjustment (AM).................................................. 31

1.4.5 Control circuit common terminals (SD, 5, SE)............................................. 32

1.4.6 Signal inputs by contactless switches......................................................... 32

1.5 How to use the input signals

(assigned terminals RL, RM, RH, STR)..................................33

1.5.1 Multi-speed setting (RL, RM, RH, REX signals):
Pr. 60 to Pr. 63 setting "0, 1, 2, 8"
Remote setting (RL, RM, RH signals):

Pr. 60 to Pr. 63 setting "0, 1, 2"...................................................................33

1.5.2 Second function selection (RT signal): Pr. 60 to Pr. 63 setting "3" .............33

1.5.3 Current input selection "AU signal": Pr. 60 to Pr. 63 setting "4" .................. 33

I

1.5.4 Start self-holding selection (STOP signal): Pr. 60 to Pr. 63 setting "5"....... 34

1.5.5 Output shut-off (MRS signal): Pr. 60 to Pr. 63 setting "6"........................... 34

1.5.6 External thermal relay input: Pr. 60 to Pr. 63 setting "7"............................. 35

1.5.7 Jog operation (JOG signal): Pr. 60 to Pr. 63 setting "9".............................. 35

1.5.8 Reset signal: Pr. 60 to Pr. 63 setting "10"................................................... 36

1.5.9 PID control valid terminal: Pr. 60 to Pr. 63 setting "14"............................... 37

1.5.10 PU operation/external operation switchover: Pr. 60 to Pr. 63 setting "16".. 37

1.6 Connection to the Stand-Alone Option................................. 38

1.6.1 Connection of the brake unit (BU type)....................................................... 38

1.6.2 Connection of the high power factor converter (FR-HC)............................. 39

1.6.3 Connection of the power regeneration common converter (FR-CV)........... 40

1.7 Handling of the RS-485 connector ........................................41

1.7.1 Connection of the parameter unit (FR-PU04) ............................................. 41

1.7.2 Wiring of RS-485 communication ............................................................... 42

1.8 Design information ................................................................. 45

2. FUNCTIONS 47

2.1 Function (Parameter) list........................................................48

2.2 List of parameters classified by purpose of use..................61

2.3 Explanation of functions (parameters) ................................. 63

2.3.1 Torque boost (Pr. 0 , Pr. 46 ) ...................................................................... 63

2.3.2 Maximum and minimum frequency (Pr. 1 , Pr. 2 ) ...................................... 64

2.3.3 Base frequency, base frequency voltage (Pr.3 , Pr.19 , Pr.47 ).................. 65

2.3.4 Multi-speed operation (Pr. 4, Pr. 5, Pr. 6, Pr. 24 to Pr. 27, Pr. 80 to Pr. 87)66

2.3.5 Acceleration/deceleration time (Pr. 7 , Pr. 8 , Pr. 20 , Pr. 44 , Pr. 45 ) ....... 67

2.3.6 Selection and protection of a motor (Pr. 9 , Pr. 71 , H7 )............................ 69

2.3.7 DC injection brake (Pr. 10 , Pr. 11 , Pr. 12 ) ............................................... 71

2.3.8 Starting frequency (Pr. 13 )......................................................................... 72

2.3.9 Load pattern selection (Pr. 14 )................................................................... 73

2.3.10 Jog operation (Pr.15 , Pr.16 )...................................................................... 74

2.3.11 RUN key rotation direction selection (Pr.17 ).............................................. 74

2.3.12 Stall prevention function and current limit function (Pr. 21 ) ....................... 75

2.3.13 Stall prevention (Pr. 22 , Pr. 23 , Pr. 28 ).................................................... 77

2.3.14 Acceleration/deceleration pattern (Pr. 29 ) ................................................. 79

2.3.15 Extended function display selection (Pr. 30 ).............................................. 80

2.3.16 Frequency jump (Pr. 31 to Pr. 36 )............................................................. 80

2.3.17 Speed display (Pr. 37 ) ............................................................................... 81

II

2.3.18 Biases and gains of the frequency setting voltage (current)

(Pr. 38 , Pr. 39 , C2 to C7 )......................................................................... 82

2.3.19 Start-time ground fault detection selection (Pr. 40 ) .................................... 86

2.4 Output terminal function parameters ....................................86

2.4.1 Up-to-frequency (Pr. 41 )............................................................................. 86

2.4.2 Output frequency detection (Pr. 42 , Pr. 43 )............................................... 87

2.5 Current detection function parameters .................................88

2.5.1 Output current detection functions (Pr. 48 , Pr. 49 ).................................... 88

2.5.2 Zero current detection (Pr. 50 , Pr. 51 )....................................................... 89

2.6 Display function parameters ..................................................90

2.6.1 Monitor display (Pr. 52 , Pr. 54 ).................................................................. 90

2.6.2 Setting dial function selection (Pr. 53 )........................................................ 91

2.6.3 Monitoring reference (Pr. 55 , Pr. 56 ).........................................................92

2.7 Restart operation parameters ................................................92

2.7.1 Restart setting (Pr. 57 , Pr. 58 , H6 )...........................................................92

CONTENTS

2.8 Additional function parameters .............................................95

2.8.1 Remote setting function selection (Pr. 59 ) ................................................. 95

2.9 Terminal function selection parameters ...............................98

2.9.1 Input terminal function selection (Pr. 60 , Pr. 61 , Pr. 62 , Pr. 63 )..............98

2.9.2 Output terminal function selection (Pr. 64 , Pr. 65 ) .................................. 100

2.10 Operation selection function parameters ...........................101

2.10.1 Retry function (Pr. 66 , Pr. 67 , Pr. 68 , Pr. 69 ) ........................................101

2.10.2 PWM carrier frequency (Pr. 70 , Pr. 72 )................................................... 103

2.10.3 Voltage input selection (Pr. 73 ) ................................................................104

2.10.4 Input filter time constant (Pr. 74 ) ..............................................................105

2.10.5 Reset selection/PU stop selection (Pr. 75 )............................................... 105

2.10.6 Cooling fan operation selection (Pr. 76 )...................................................107

2.10.7 Parameter write disable selection (Pr. 77 ) ...............................................108

2.10.8 Reverse rotation prevention selection (Pr. 78 ).........................................109

2.10.9 Operation mode selection (Pr. 79 ) ........................................................... 109

2.10.10PID control (Pr. 88 to Pr. 94 )................................................................... 113

2.11 Auxiliary parameters .............................................................120

2.11.1 Slip compensation (Pr. 95 , Pr. 96 , Pr. 97 ).............................................. 120

2.11.2 Automatic torque boost selection (Pr. 98 )................................................ 121

2.11.3 Motor primary resistance (Pr. 99 )............................................................. 122

2.12 Maintenance parameters ......................................................122

III

2.12.1 Maintenance output function (H1, H2 ) ..................................................... 122

2.12.2 Current average value monitor signal (H3, H4, H5)................... 123

2.13 Calibration parameters ......................................................... 126

2.13.1 Meter (frequency meter) calibration (C1 )................................................. 126

2.14 Clear parameters................................................................... 129

2.14.1 Parameter clear (CLr ) .............................................................................. 129

2.14.2 Alarm history clear (ECL )......................................................................... 129

2.15 Communication parameters................................................. 130

2.15.1 Communication settings (n1 to n7 , n11 ) ................................................ 132

2.15.2 Operation and speed command source (n8 , n9 ) .................................... 147

2.15.3 Link startup mode selection (n10 )............................................................ 148

2.15.4 E2PROM write selection (n12 )................................................................. 150

2.16 Parameter unit (FR-PU04) setting........................................ 151

2.16.1 PU display language selection (n13 ) ....................................................... 151

2.16.2 PU buzzer control (n14 )........................................................................... 151

2.16.3 PU contrast adjustment (n15 ) .................................................................. 152

2.16.4 PU main display screen data selection (n16 )........................................... 152

2.16.5 Disconnected PU detection/PU setting lock selection (n17 ).................... 153

3. PROTECTIVE FUNCTIONS 155

3.1 Errors (Alarms)...................................................................... 156

3.1.1 Error (alarm) definitions ............................................................................ 157

3.1.2 To know the operating status at the occurrence of alarm

(only when FR-PU04 is used) ................................................................... 165

3.1.3 Correspondence between digital and actual characters........................... 165

3.1.4 Resetting the inverter................................................................................ 165

3.2 Troubleshooting.................................................................... 166

3.2.1 Motor remains stopped ............................................................................. 166

3.2.2 Motor rotates in opposite direction............................................................ 167

3.2.3 Speed greatly differs from the setting ....................................................... 167

3.2.4 Acceleration/deceleration is not smooth ................................................... 167

3.2.5 Motor current is large ................................................................................ 167

3.2.6 Speed does not increase .......................................................................... 167

3.2.7 Speed varies during operation.................................................................. 167

3.2.8 Operation mode is not changed properly.................................................. 168

3.2.9 Operation panel display is not operating................................................... 168

3.2.10 Parameter write cannot be performed ...................................................... 168

IV

3.2.11 Motor produces annoying sound...............................................................168

4. SPECIFICATIONS 169

4.1 Specification list....................................................................170

4.1.1 Ratings ...................................................................................................... 170

4.1.2 Common specifications ............................................................................. 173

4.2 Outline drawings ...................................................................175

APPENDIX 179

APPENDIX 1 Parameter Instruction Code List .............................180

CONTENTS

V

1. WIRING

This chapter explains the basic "wiring" for use of this product. Always
read the instructions before use.
For description of "installation", refer to the instruction manual (basic).

1.1 Standard connection diagram and terminal

specifications .....................................................

1.2 Main circuit terminals ........................................ 6

1.3 How to use the control circuit terminals.......... 22

1.4 Input terminals.................................................... 25

1.5 How to use the input signals (assigned

terminals RL, RM, RH, STR) ..............................

1.6 Connection to the Stand-Alone Option ............ 38

1.7 Handling of the RS-485 connector...................... 41

2

33

1.8 Design information............................................. 45

<Abbreviations>

•PU

Operation panel and parameter unit (FR-PU04)

•Inverter

Mitsubishi transistorized inverter FR-S500 series

•FR-S500

Mitsubishi transistorized inverter FR-S500 series

•Pr.

Parameter number

Chapter 1

Chapter 2

Chapter 3

Chapter 4

1

Standard connection diagram and terminal specifications

1.1 Standard connection diagram and terminal
specifications

1.1.1 Standard connection diagram

 Three-phase 200V power input
 Three-phase 400V power input

NFB MC

Three-phase AC
power supply

External transistor common
24VDC power supply
Contact input common (source)

Take care not to short
terminals PC-SD.

Forward rotation start
Control input
signals
(No voltage
input allowed)

Frequency setting signals (Analog)

Frequency setting
potentiometer

1/2W1kΩ

Reverse rotation start

Multi-speed

selection

Contact input common

3

*4

1

Current input(-)

4 to 20mADC(+)

When using the current input as
the frequency setting signal, set
"4" in any of Pr. 60 to Pr. 63 (input
terminal function selection), assign
AU (current input selection) to any
of terminals RH, RM, RL and STR
and turn on the AU signal.

High speed

Middle speed

Low speed

2

Inverter

R/L1

S/L2
T/L3

PC

STF
STR

*5
*5

RH

*5

RM
RL

*5

SD

10

(+5V)

0 to 5VDC

2

0 to 10VDC

5

(Common)

4

(4 to 20mADC)

SINK

*3

SOURCE

RS-485

Connector

*1

*2
*6

*6

*6

*6

RUN

Selected

U
V

W

P1

P/+

N/-

PR

A

B

C

SE

AM

Running

Open
collector
output
common

5

Motor

IM

Ground

Power factor improving
DC reactor
(FR-BEL: Option)

Jumper:

jumper when FR-BEL
is connected.

Alarm output

Remove this

Operation status
output

Open collector
outputs

(+)

Analog signal
output
(0 to 5VDC)

(-)

Ground

REMARKS

*1. The N/- terminal is not provided for the FR-S520E-0.1K to 0.75K-NA.
*2. The PR terminal is provided for the FR-S520E-0.4K to 3.7K-NA. (not used)
*3. You can switch the position of sink and source logic. Refer to page 23.
*4. When the setting potentiometer is used frequently, use a 2W1kΩ potentiometer.
*5. The terminal functions change with input terminal function selection (Pr. 60 to Pr. 63). (Refer to page 98.)

(RES, RL, RM, RH, RT, AU, STOP, MRS, OH, REX, JOG, X14, X16, (STR) signal selection)

*6. The terminal function changes according to the setting of output terminal function selection (Pr. 64, Pr. 65).

(Refer to page 100.) (RUN, SU, OL, FU, RY, Y12, Y13, FDN, FUP, RL, Y93, Y95, LF, ABC signal selection)

CAUTION

To prevent a malfunction due to noise, keep the signal cables more than 10cm away
from the power cables.

Control circuit terminalMain circuit terminal

2

 Single-phase 100V power input

Standard connection diagram and terminal specifications

NFB

Power
supply

MC

R/L1
S/L

Motor

U

2

V

W

IM

Ground

REMARKS

•To ensure safety, connect the power input to the inverter via a magnetic contactor and earth leakage

circuit breaker or no-fuse breaker, and use the magnetic contactor to switch power on-off.

•The output is three-phase 200V.

1.1.2 Explanation of main circuit terminals

(1) Main circuit

Terminal

Symbol

R/L1, S/L2,

T/L3 (*1)

U, V, W Inverter output

Terminal Name Description

AC power input

Connect to the commercial power supply.

Connect a three-phase squirrel-cage motor.

PR (*2)

P/+, N/−

P/+, P1

Brake unit

connection

Power factor

improving DC

reactor

connection

Connect the brake unit (BU), power regeneration
common converter (FR-CV) or high power factor
converter (FR-HC). (The N/- terminal is not provided for
the FR-S520E-0.1K to 0.75K-NA.)

Remove the jumper across terminals P - P1 and connect
the optional power factor improving DC reactor (FR­BEL(-H)).
(The single-phase 100V power input model cannot be
connected.)

Do not use PR terminal.

Ground For grounding the inverter chassis. Must be grounded.

*1. When using single-phase power input, terminals are R/L1 and S/L2.
*2. The PR terminal is provided for the FR-S520E-0.4K to 3.7K-NA.

1

WIRING

3

Standard connection diagram and terminal specifications

(2) Control circuit

Symbol Terminal Name Definition

Turn on the STF signal to
start forward rotation and
turn it off to stop.

Turn on the STR signal to
start reverse rotation and
turn it off to stop.
Turn on the RH, RM and RL signals in
appropriate combinations to select
multiple speeds.
The priorities of the speed commands
are in order of jog, multi-speed setting
(RH, RM, RL, REX) and AU.
Common to the contact input terminals (STF, STR, RH, RM,
RL). (*6)

When connecting the transistor output (open collector output),
such as a programmable controller (PLC), connect the positive
external power supply for transistor output to this terminal to
prevent a malfunction caused by undesirable currents.
This terminal can be used as a 24VDC, 0.1A power output
across terminals PC-SD.
When source logic has been selected, this terminal serves
as a contact input common.

5VDC, Permissible load current 10mA.

Inputting 0 to 5VDC (or 0 to 10V) provides the maximum output
frequency at 5V (10V) and makes input and output proportional.
Switch between 5V and 10V using Pr. 73 "0-5V, 0-10V selection".
Input resistance 10kΩ. Maximum permissible input voltage 20V
Input 4 to 20mADC. It is factory set at 0Hz for 4mA and at
60Hz for 20mA.
Maximum permissible input current 30mA. Input resistance
approximately 250Ω.
Turn ON signal AU for current input.
Turning the AU signal on makes voltage input invalid. Use any of
Pr. 60 to Pr. 63 (input terminal function selection) to set the AU
signal.
Common terminal for the frequency setting signals
(terminal 2, 4) and indicator connection (terminal AM). (*6)

Input signals

STF

STR

RH

Contact input

RM

RL

SD

(*1)

PC

(*1)

10

Frequency setting

5

Forward rotation
start

Reverse rotation
start

Multi-speed
selection

Contact input
common (sink)

External
transistor
common, 24VDC
power supply,
contact input
common (source)

Frequency setting
power supply

Frequency setting

2

(voltage signal)

Frequency setting

4

(current signal)

Frequency setting
input common

When the STF and STR
signals are turned on
simultaneously, the stop
command is given.

The terminal
functions change
with input terminal
function selection
(Pr. 60 to Pr.63).
(*3)

4

Standard connection diagram and terminal specifications

Symbol Terminal Name Definition

Changeover contact output indicates
that the inverter protective function has

Output signals

A
B
C

RUN

Open collector

SE

Indicator

Alarm output

Inverter

running

Open collector

common

Analog signal

AM

output

activated and the output stopped.
230VAC 0.3A, 30VDC 0.3A. Alarm:
discontinuity across B-C (continuity
across A-C), Normal: continuity across
B-C (discontinuity across A-C).(*5)
Switched low when the inverter output
frequency is equal to or higher than the
starting frequency (factory set to 0.5Hz
variable). Switched high during stop or
DC injection brake operation. (*2)
Permissible load 24VDC 0.1A (a
voltage drop is 3.4V maximum when
the signal is on)

Common terminal for inverter running terminal RUN.

The output signal across terminals AM-5 is factory set to about
5VDC at 60Hz and is proportional to the corresponding output
frequency.
Frequency permissible load current 1mA
Output signal 0 to 5VDC

The function of the
terminals changes
according to the
output terminal
function selection
(Pr. 64, Pr.65).
(*4)

(*6)

Using the parameter unit connection cable (FR-CB201 to

——

RS-485

connector

205), the parameter unit (FR-PU04) can be connected.
Communication operation can be performed using RS-485.
For details of RS-485 communication, refer to page 42.

Communication

*1. Do not connect terminals SD and PC each other or to the ground.

For sink logic (factory setting), terminal SD acts as the common terminal of contact input.
For source logic, terminal PC acts as the common terminal of contact input. (Refer to
page 23 for switching method.)

*2. Low indicates that the open collector output transistor is on (conducts). High indicates

that the transistor is off (does not conduct).

*3. RL, RM, RH, RT, AU, STOP, MRS, OH, REX, JOG, RES, X14, X16, (STR) signal

selection (Refer to page 98.)

*4. RUN, SU, OL, FU, RY, Y12, Y13, FDN, FUP, RL, Y93, Y95, LF, ABC signal selection

(Refer to page 100.)

*5. To be compliant with the European Directive (Low Voltage Directive), the operating

capacity of relay outputs (A, B, C) should be 30VDC 0.3A.

*6. Terminals SD, SE and 5 are isolated from each other. Do not ground.

1

WIRING

5

Main circuit terminals

r

r

1.2 Main circuit terminals

1.2.1 Terminal block layout

1) Three-phase 200V power input

• FR-S520E-0.1K, 0.2K-NA • FR-S520E-1.5K, 2.2K, 3.7K-NA

P/+

P1

R/L1 S/L2 T/L3

Power supply

U V W

IM

Motor

• FR-S520E-0.4K, 0.75K-NA

P1

IM

P/+

R/L1 S/L2

T/L3

Power supply

PR

U V W

Motor

Jumpe

Jumpe

N/-

PR

P/+

P1

Jumper

R/L1 S/L2 T/L3

Power supply

U V W

IM

Motor

2) Three-phase 400V power input

• FR-S540E-0.4K, 0.75K, 1.5K, 2.2K, 3.7K

-NA

Jumper

P/+

N/-

P1

R/L1 S/L2 T/L3

Power supply

6

U V W

IM

Motor

Main circuit terminals

3) Single-phase 100V power input

• FR-S510WE-0.1K, 0.2K, 0.4K-NA • FR-S510WE-0.75K-NA

R/L1 S/L2

Power supply

P/+N/-

U V W

IM

Motor

N/-

P/+

R/L1 S/L2

Power supply

U V W

IM

Motor

CAUTION

•Make sure the power cables are connected to the R/L1, S/L2, T/L3 of the inverter.

Never connect the power cable to the U, V, W of the inverter. (Phase need not be
matched)

•Connect the motor to U, V, W. At this time, turning on the forward rotation switch

(signal) rotates the motor in the counterclockwise direction when viewed from the
motor shaft.

1

WIRING

7

Main circuit terminals

1.2.2 Cables, wiring length, and crimping terminals

The following table indicates a selection example for the wiring length of 20m (65.62
feet).

1) Three-phase 200V power input

PVC Insulation

Cable

2

mm

R, S, T

U, V, W

PVC Insulation

Cable

2

mm

Applied Inverter

FR-S520E-0.1K
to 0.75K-NA

FR-S520E-

1.5K, 2.2K-NA
FR-S520E-

3.7K-NA

Ter-

minal

Screw

size

M3.5 1.2 2-3.5 2-3.5 2 2 14 14 2.5 2.5

M4 1.5 2-4 2-4 2 2 14 14 2.5 2.5

M4 1.5 5.5-4 5.5-4 3.5 3.5 12 12 4 2.5

Tight­ening

Torque

⋅

m

N

Crimping

R, S, T U, V, W

2) Three-phase 400V power input

Applied Inverter

FR-S540E-0.4K

to 3.7K-NA

Ter-

minal

Screw

size

M4 1.5 2-4 2-4 2 2 14 14 2.5 2.5

Tight­ening

Torque

⋅

m

N

Crimping

R, S, T U, V, W R, S, T U, V, W R, S, T U, V, W R, S, T U, V, W

Terminal

Terminal

mm

R, S, T

mm

Cable

2

U, V, W

Cable

2

AWG

R, S, T

AWG

U, V, W

3) Single-phase 100V power input

PVC Insulation

Cable

2

mm

Applied Inverter

FR-S510WE-

0.1K
to 0.4K-NA
FR-S510WE-0.75K­NA

Termi-

nal

Screw

size

M3.5 1.2 2-3.5 2-3.5 2 2 14 14 2.5 2.5

M4 1.5 5.5-4 2-4 3.5 2 12 14 4 2.5

Tight­ening

Torque

⋅

m

N

2

Cable

AWG

Crimping

Terminal

mm

R, S U, V, W R, S U, V, W R, S U, V, W R, S U, V, W

 Wiring length

100m (328.08 feet) maximum. (50m (164.04 feet) maximum for the FR-S540E-

0.4K-NA.)

CAUTION

•When the wiring length of the 0.1K and 0.2K of the three-phase 200V and
single-phase 100V class and the 0.4K and 0.75K of the three-phase 400V class
is 30m (98.43 feet) or more, set the carrier frequency to 1kHz.

•When automatic torque boost is selected in Pr. 98 "automatic torque boost
selection (motor capacity)", the wiring length should be 30m (98.43 feet)
maximum. (Refer to page 121.)

8

Main circuit terminals

1.2.3 Wiring instructions

1) Use insulation-sleeved crimping terminals for the power supply and motor cables.

2) Application of power to the output terminals (U, V, W) of the inverter will damage the
inverter. Never perform such wiring.

3) After wiring, wire offcuts must not be left in the inverter.
Wire offcuts can cause an alarm, failure or malfunction. Always keep the inverter
clean.
When drilling a control box etc., take care not to let wire offcuts enter the inverter.

4) Use cables of the recommended size to make a voltage drop 2% maximum.
If the wiring distance is long between the inverter and motor, a main circuit cable
voltage drop will cause the motor torque to decrease especially at the output of a
low frequency.

5) For long distance wiring, the high response current limit function may be reduced or
the devices connected to the secondary side may malfunction or become faulty
under the influence of a charging current due to the stray capacity of wiring.
Therefore, note the maximum overall wiring length.

6) Electromagnetic wave interference
The input/output (main circuit) of the inverter includes high frequency components,
which may interfere with the communication devices (such as AM radios) used near
the inverter. In this case, install a FR-BIF(-H) optional radio noise filter (for use on
the input side only) or FR-BSF01 or FR-BLF line noise filter to minimize
interference.

7) Do not install a power capacitor, surge suppressor or radio noise filter (FR-BIF(-H)
option) on the output side of the inverter.
This will cause the inverter to trip or the capacitor and surge suppressor to be
damaged. If any of the above devices are connected, remove them. (When using
the FR-BIF(-H) radio noise filter with a single-phase power supply, connect it to the
input side of the inverter after isolating the T phase securely.)

8) Before starting wiring or other work after the inverter is operated, wait for at least 10
minutes after the power supply has been switched off, and check that there are no
residual voltage using a tester or the like. The capacitor is charged with high
voltage for some time after power off and it is dangerous.

1

WIRING

9

Main circuit terminals

1.2.4 Selection of peripheral devices

Check the capacity of the motor applicable to the inverter you purchased. Appropriate
peripheral devices must be selected according to the capacity.
Refer to the following list and prepare appropriate peripheral devices:

1) Three-phase 200V power input

Motor

Output

(kW

(HP))

0.1

(1/8)

0.2

(1/4)

0.4

(1/2)

0.75
(1)

1.5
(2)

2.2
(3)

3.7
(5)

Applied Inverter

Type

FR-S520E-0.1K-NA

FR-S520E-0.2K-NA

FR-S520E-0.4K-NA

FR-S520E-0.75K-NA

FR-S520E-1.5K-NA

FR-S520E-2.2K-NA

FR-S520E-3.7K-NA

No-fuse Breaker

(NFB *1, 4) or

Earth Leakage
Circuit Breaker
(ELB) (Refer to

page 12) (*2, 4)

30AF/5A S-N10

30AF/5A S-N10

30AF/5A S-N10 FR-BAL-0.4K FR-BEL-0.4K

30AF/10A S-N10 FR-BAL-0.75K FR-BEL-0.75K

30AF/15A S-N10 FR-BAL-1.5K FR-BEL-1.5K

30AF/20A S-N10 FR-BAL-2.2K FR-BEL-2.2K

30AF/30A

Magnetic

Contactor

(MC)

(Refer to

page 16 )

S-N20,

S-N21

Power Factor

Improving AC

Reactor

(Refer to page

17)

FR-BAL-0.4K

(*3)

FR-BAL-0.4K

(*3)

FR-BAL-3.7K FR-BEL-3.7K

Power Factor

Improving DC

Reactor

(Refer to page

FR-BEL-0.4K

FR-BEL-0.4K

17)

(*3)

(*3)

2) Three-phase 400V power input

No-fuse Breaker

Motor

Output

(kW

(HP))

Applied Inverter

Type

(NFB *1, 4) or

Earth Leakage
Circuit Breaker
(ELB) (Refer to

page 12) (*2, 4)

0.4

(1/2)

0.75
(1)

1.5
(2)

2.2
(3)

3.7
(5)

FR-S540E-0.4K-NA

FR-S540E-0.75K-NA

FR-S540E-1.5K-NA

FR-S540E-2.2K-NA

FR-S540E-3.7K-NA

30AF/5A S-N10

30AF/5A S-N10

30AF/10A S-N10

30AF/15A S-N10

30AF/20A

Magnetic

Contactor

(MC)

(Refer to

page 16)

S-N20,

S-N21

Power Factor

Improving AC

Reactor

(Refer to page

17)

FR-BAL-

H0.4K

FR-BAL-

H0.75K

FR-BAL-

H1.5K

FR-BAL-

H2.2K

FR-BAL-

H3.7K

Power Factor

Improving DC

Reactor

(Refer to page

17)

FR-BEL-

H0.4K

FR-BEL-

H0.75K

FR-BEL-

H1.5K

FR-BEL-

H2.2K

FR-BEL-

H3.7K

10

3) Single-phase 100V power input

Main circuit terminals

No-fuse Breaker

Motor

Output

(kW

(HP))

Applied Inverter

Type

(NFB *1, 4) or

Earth Leakage
Circuit Breaker
(ELB) (Refer to

Magnetic

Contactor

(MC)
(Refer to
page 16)

Power Factor

Improving AC

Reactor

(Refer to page

17) (*3)

Power Factor

Improving DC

Reactor

(Refer to page

17) (*5)

page 12) (*2, 4)

0.1

(1/8)

0.2

(1/4)

0.4

(1/2)

0.75
(1)

*1. •Select the NFB according to the inverter power

FR-S510WE-0.1K-NA

FR-S510WE-0.2K-NA

FR-S510WE-0.4K-NA

FR-S510WE-0.75K-NA

30AF/10A S-N10 FR-BAL-0.75K 

30AF/15A S-N10 FR-BAL-1.5K 

30AF/20A

30AF/30A

supply capacity.

•Install one NFB per inverter.

S-N20,

S-N21

S-N20,

S-N21

FR-BAL-2.2K 

FR-BAL-3.7K 

NFB

NFB INV

INV

*2. For installations in the United States or Canada, the circuit breaker must be inverse

time or instantaneous trip type.
*3. The power factor may be slightly lower.
*4. When the breaker on the inverter primary side trips, check for the wiring fault (short

circuit), damage to internal parts of the inverter, etc. Identify the cause of the trip,

then remove the cause and power on the breaker.
*5. The single-phase 100V power input model does not allow the power factor improving

DC reactor to be fitted.

IM

IM

1

WIRING

11

Main circuit terminals

1.2.5 Leakage current and installation of ground leakage
circuit breaker

Due to static capacitances existing in the inverter I/O wiring and motor, leakage
currents flow through them. Since their values depend on the static capacitances,
carrier frequency, etc., take the following countermeasures.

(1) To-ground leakage currents

Leakage currents may flow not only into the inverter's own line but also into the
other line through the ground cable, etc.
These leakage currents may operate ground leakage circuit breakers and ground

leakage relays unnecessarily.

Countermeasures

• If the carrier frequency setting is high, decrease the carrier frequency (Pr. 72) of the

inverter.
Note that motor noise increases. Selection of Soft-PWM control (Pr. 70) will make it
unoffending. (Factory setting)

• By using earth leakage circuit breakers designed for harmonic and surge

suppression in the inverter's own line and other line, operation can be performed
with the carrier frequency kept high (with low noise).

12

(2) Line-to-line leakage currents

Main circuit terminals

Harmonics of
leakage currents
flowing in static
capacities between
the inverter output
cables may operate
the external thermal

Power
supply

NFB

Inverter

Line-to-Line Leakage Current Path

Thermal relay

Line static
capacitances

Motor

IM

relay unnecessarily.

Countermeasures

• Use the electronic thermal relay function of the inverter.

• Decrease the carrier frequency. Note that motor noise increases. Selection of

Soft-PWM (Pr. 70) makes it unoffending.
To ensure that the motor is protected against line-to-line leakage currents, it is

recommended to use a temperature sensor to directly detect motor temperature.

Installation and selection of no-fuse breaker
Install a no-fuse breaker (NFB) on the power receiving side to protect the wiring of

the inverter primary side. Select the NFB according to the power supply side power
factor (which depends on the power supply voltage, output frequency and load).
Especially for a completely electromagnetic NFB, one of a slightly large capacity
must be selected since its operation characteristic varies with harmonic currents.
(Check it in the data of the corresponding breaker.) As an ground leakage breaker,
use the Mitsubishi ground leakage breaker designed for harmonics and surge
suppression. (Refer to page 10 for the recommended models.)

CAUTION

•Select the NFB according to the inverter power supply capacity.

•Install one NFB per inverter.

1

WIRING

13

Main circuit terminals

)

(3) Selecting the rated sensitivity current for the earth leakage circuit

breaker

When using the earth leakage circuit breaker with the inverter circuit, select its rated
sensitivity current as follows, independently of the PWM carrier frequency:

• Breaker for harmonic and surge

Rated sensitivity current:
I

∆n ≥ 10 × (lg1+Ign+lg2+lgm)

• Standard breaker

Rated sensitivity current:
I

∆n ≥ 10 × {lg1+lgn+3 × (lg2+lgm)}

lg1, lg2 : Leakage currents of cable

path during commercial
power supply operation

lgn* : Leakage current of noise

filter on inverter input side

lgm : Leakage current of motor

during commercial power
supply operation

* Note the leakage current value of the

noise filter installed on the inverter
input side.

Example of leakage
current per 1km in cable
path during commercial
power supply operation
when the CV cable is
routed in metal conduit

(200V 60Hz)

120

100

80

60

40

20

0

Leakage current (mA)

2 3.5 8 142238 80

5.5 3060100

Cable size (mm)

150

2

Leakage current
example of three-phase
induction motor
during commercial
power supply
operation

(200V 60Hz)

2.0

1.0

0.7

0.5

0.3

0.2

0.1

1.5 3 .7

Leakage current (mA)

Motor capacity (kW

2.2

7.5 15 2 21137

5.5 18.5

55

45

30

<Example>

22

2mm ×5m

Noise

NV

filter

Ig1 Ign Ig2 Igm

Breaker for harmonic and

Leakage current (Ig1) (mA)

Leakage current (Ign) (mA) 0 (without noise filter)

Leakage current (Ig2) (mA)

Motor leakage
current (Igm) (mA)

Total leakage current (mA) 1.66 4.78
Rated sensitivity current

(mA) (≥ Ig

× 10)

2mm ×70m

3

Inver­ter

IM

200V

1.5kW

surge

20 ×

20 ×

5m

1000m

70m

1000m

0.16

30 100

Standard breaker

= 0.10

= 1.40

14

Main circuit terminals

CAUTION

•The ground leakage circuit breaker should be installed to the primary (power
supply) side of the inverter.

•In the connection neutral point grounded system, the sensitivity current
becomes worse for ground faults on the inverter secondary side. Grounding
must conform to the requirements of national and local safety regulations and
electrical codes. (JIS, NEC section 250, IEC 536 class 1 and other applicable
standards)

•When the breaker is installed on the secondary side of the inverter, it may be
unnecessarily operated by harmonics if the effective value is less than the
rating. In this case, do not install the breaker since the eddy current and
hysteresis loss increase and the temperature rises.

•General products indicate the following models: BV-C1, BC-V, NVB, NV-L, NV­G2N, NV-G3NA, NV-2F, ground leakage relay (except NV-ZHA), NV with AA
neutral wire open-phase protection
The other models are designed for harmonic and surge suppression: NV-C/
NV-S/MN series, NV30-FA, NV50-FA, BV-C2, ground leakage alarm breaker
(NF-Z), NV-ZHA, NV-H

1

WIRING

15

Main circuit terminals

r

1.2.6 Power-off and magnetic contactor (MC)

(1) Inverter input side magnetic contactor (MC)

On the inverter's input side, it is recommended to provide an MC for the following
purposes. (Refer to page 10 for selection)

1) To release the inverter from the power supply when the inverter protective function
is activated or the drive becomes faulty (e.g. emergency stop operation)

2) To prevent any accident due to an automatic restart at restoration of power after an
inverter stop made by a power failure

3) To rest the inverter for an extended period of time
The control power supply for inverter is always running and consumes a little power.
When stopping the inverter for an extended period of time, powering off the inverter
will save power slightly.

4) To separate the inverter from the power supply to ensure safe maintenance and
inspection work
The inverter's input side MC is used for the above purpose, select class JEM1038­AC3 for the inverter input side current when making an emergency stop during
normal operation.

REMARKS

The MC may be switched on/off to start/stop the inverter. However, since repeated inrush
currents at power on will shorten the life of the converter circuit (switching life is about 100,000
times), frequent starts and stops must be avoided. Turn on/off the inverter start controlling
terminals (STF, STR) to run/stop the inverter.

As shown on the right,
always use the start signal
(ON or OFF across
terminals STF or STR-SD)
to make a start or stop.
(Refer to page 25)

*1. When the power supply

is 400V class, install a
step-down transformer.

Power
supply

Operation ready

NFB

OFF

Start/Stop

ON

MC

MC

T (*1)

MC

RA

R/L1
S/L2
T/L3

Inverter

STF(STR)
SD

U

V

W

To
moto

A

B

C

(2) Handling of output side magnetic contactor

In principle, do not provide a magnetic contactor between the inverter and motor and
switch it from off to on during operation. If it is switched on during inverter operation, a
large inrush current may flow, stopping the inverter due to overcurrent shut-off. When
an MC is provided for switching to the commercial power supply, for example, switch it
on/off after the inverter and motor have stopped.

MC

Operation

OFF

RA

Inverter Start/Stop Circuit Example

RA

16

Main circuit terminals

1.2.7 Regarding the installation of the power factor
improving reactor

When the inverter is installed near a large-capacity power transformer (500kVA or
more with the wiring length of 10m (32.81feet) or less) or the power capacitor is to be
switched, an excessive peak current will flow in the power supply input circuit,
damaging the converter circuit. In such a case, always install the power factor
improving reactor (FR-BEL(-H) or FR-BAL(-H)).

Power
supply

NFB

FR-BAL(-H)

R

S

TZ

Inverter

X

R

Y

S

T

P

FR-BEL(-H)(*)

P1

U

V

W

Power supply equipment

1500

1000

500

capacity (kVA)

Power factor
improving reactor
installation range

010

Wiring length (m)

REMARKS

*When connecting the FR-BEL(-H), remove the jumper across terminals P-P1.

The wiring length between the FR-BEL(-H) and the inverter should be 5m(16.40feet)
maximum and as short as possible.
Use the cables which are equal in size to those of the main circuit. (Refer to page 8)

1

WIRING

17

Main circuit terminals

r

1.2.8 Regarding noise and the installation of a noise filter

Some noise enters the inverter causing it to malfunction and others are generated by
the inverter causing the malfunction of peripheral devices. Though the inverter is
designed to be insusceptible to noise, it handles low-level signals, so it requires the
following general countermeasures to be taken.

(1) General countermeasures

• Do not run the power cables (I/O cables) and signal cables of the inverter in parallel
with each other and do not bundle them.

• Use twisted shield cables for the detector connecting and control signal cables and
connect the sheathes of the shield cables to terminal SD.

• Ground the inverter, motor, etc. at one point.

• Capacitances exist between the inverter's I/O wiring, other cables, ground and

motor, through which leakage currents flow to cause the earth leakage circuit
breaker, ground leakage relay and external thermal relay to operate unnecessarily.
To prevent this, take appropriate measures, e.g. set the carrier frequency in Pr. 72 to
a low value, use a ground leakage circuit breaker designed for suppression of
harmonics and surges, and use the electronic thermal relay function built in the
inverter.

• The input and output of the inverter main circuit include high-degree harmonics,
which may disturb communication devices (AM radios) and sensors used near the
inverter. In this case, install a FR-BIF(-H) optional radio noise filter (for use on the
input side only) or FR-BSF01 line noise filter to minimize interference.

<Noise reduction examples>

Install filter

on inverter's input side.

Inverter
power supply

Install filter FR-BIF
on inverter's input side.

Separate inverter and power line
by more than 30cm (3.94inches)
and at least 10cm (11.81inches)

from sensor circuit.

Control
power supply

FR-BSF01

Do not ground control
box directly.

Do not ground
control cable.

Control

box

FR­BSF01

FR-BIF

Reduce carrier
frequency.

Inverter

Power
supply
for sensor

Install filter

on inverter's output side.

FR-BSF01

FR­BSF01

Use 4-core cable for motor
power cable and use one
cable as ground cable.

Use twisted pair shielded cable.

Sensor

Do not ground shield but connect
it to signal common cable.

IM

Moto

18

Main circuit terminals

1.2.9 Grounding precautions

 Leakage currents flow in the inverter. To prevent an electric shock, the inverter and

motor must be grounded. Grounding must conform to the requirements of national
and local safety regulations and electrical codes.
(JIS, NEC section 250, IEC 536 class 1 and other applicable standards)

 Use the dedicated ground terminal to ground the inverter. (Do not use the screw in

the casing, chassis, etc.)
Use a tinned* crimping terminal to connect the ground cable. When tightening the
screw, be careful not to damage the threads.

*Plating should not include zinc.

 Use the thickest possible ground cable. Use the cable whose size is equal to or

greater than that indicated in the following table, and minimize the cable length.

The grounding point should be as near as possible to the inverter.

2

Motor Capacity

200V class, 100V class 400V class

2.2kW or less 2 (2.5) 2 (2.5)

3.7kW 3.5 (4) 2 (4)

Ground Cable Size (Unit: mm

For use as a product compliant with the Low Voltage Directive, use PVC cable
whose size is indicated within parentheses.

)

 Ground the motor on the inverter side using one wire of the 4-core cable.

1

WIRING

19

Main circuit terminals

1.2.10 Power supply harmonics

The inverter may generate power supply harmonics from its converter circuit to affect
the power generator, power capacitor etc. Power supply harmonics are different from
noise and leakage currents in source, frequency band and transmission path. Take the
following countermeasure suppression techniques.

The following table indicates differences between harmonics and noise:

Item Harmonics Noise

Frequency

Environment To-electric channel, power impedance To-space, distance, wiring path
Quantitative

understanding

Generated amount Nearly proportional to load capacity

Affected equipment
immunity

Suppression example Provide reactor. Increase distance.

Normally 40th to 50th degrees or less
(up to 3kHz or less)

Theoretical calculation possible

Specified in standard per equipment

High frequency (several 10kHz
to 1GHz order)

Random occurrence,
quantitative grasping difficult

Change with current variation
ratio (larger as switching speed
increases)

Different depending on maker's
equipment specifications

Suppression technique

Harmonic currents produced
on the power supply side by
the inverter change with such
conditions as whether there
are wiring impedances and a
power factor improving reactor

NFB

FR-BAL

FR-BAL(-H)

FR-BEL

FR-BEL(-H)

Inverter

Motor

IM

(FR-BEL(-H) or FR-BAL(-H))
and the magnitudes of output
frequency and output current
on the load side.

Do not provide power factor
improving capacitor.

For the output frequency and output current, we understand that they should be
calculated in the conditions under the rated load at the maximum operating frequency.

CAUTION

The power factor improving capacitor and surge suppressor on the inverter
output side may be overheated or damaged by the harmonic components of the
inverter output. Also, since an excessive current flows in the inverter to activate
overcurrent protection, do not provide a capacitor and surge suppressor on the
inverter output side when the motor is driven by the inverter. To improve the
power factor, insert a power factor improving reactor on the inverter's primary
side or DC circuit. For full information, refer to page 17.

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