Delta Electronics VFD-EL User Manual

Preface

Thank you for choosing DELTA’s multifunction VFD-EL Series. The VFD-EL Series is manufactured

with high-quality components and materials and incorporate the latest microprocessor technology

available.

This manual is to be used for the installation, parameter setting, troubleshooting, and daily

maintenance of the AC motor drive. To guarantee safe operation of the equipment, read the following

safety guidelines before connecting power to the AC motor drive. Keep this operating manual at

hand and distribute to all users for reference.

To ensure the safety of operators and equipment, only qualified personnel familiar with AC motor

drive are to do installation, start-up and maintenance. Always read this manual thoroughly before

using VFD-EL series AC Motor Drive, especially the WARNING, DANGER and CAUTION notes.

Failure to comply may result in personal injury and equipment damage. If you have any questions,

please contact your dealer.

PLEASE READ PRIOR TO INSTALLATION FOR SAFETY.

DANGER!

1. AC input power must be disconnected before any wiring to the AC motor drive is made.

2. A charge may still remain in the DC-link capacitors with hazardous voltages, even if the power

has been turned off. To prevent personal injury, please ensure that power has turned off before

opening the AC motor drive and wait ten minutes for the capacitors to discharge to safe voltage

levels.

3. Never reassemble internal components or wiring.

4. The AC motor drive may be destroyed beyond repair if incorrect cables are connected to the

input/output terminals. Never connect the AC motor drive output terminals U/T1, V/T2, and

W/T3 directly to the AC mains circuit power supply.

5. Ground the VFD-EL using the ground terminal. The grounding method must comply with the

laws of the country where the AC motor drive is to be installed. Refer to the Basic Wiring

Diagram.

6. VFD-EL series is used only to control variable speed of 3-phase induction motors, NOT for 1-

phase motors or other purpose.

7. VFD-EL series shall NOT be used for life support equipment or any life safety situation.

WARNI NG!

1. DO NOT use Hi-pot test for internal components. The semi-conductor used in AC motor drive

easily damage by high-voltage.

2. There are highly sensitive MOS components on the printed circuit boards. These components

are especially sensitive to static electricity. To prevent damage to these components, do not

touch these components or the circuit boards with metal objects or your bare hands.

3. Only qualified persons are allowed to install, wire and maintain AC motor drives.

CAUTION!

1. DO NOT install the AC motor drive in a place subjected to high temperature, direct sunlight,

high humidity, excessive vibration, corrosive gases or liquids, or airborne dust or metallic

particles.

2. Some parameters settings can cause the motor to run immediately after applying power

3. Only use AC motor drives within specification. Failure to comply may result in fire, explosion or

electric shock.

4. To prevent personal injury, please keep children and unqualified people away from the

equipment.

5. When the motor cable between AC motor drive and motor is too long, the layer insulation of the

motor may be damaged. Please use a frequency inverter duty motor or add an AC output

reactor to prevent damage to the motor. Refer to appendix B Reactor for details.

6. The rated voltage for AC motor drive must be ≤ 240V (≤ 480V for 460V models) and the mains supply current capacity must be ≤ 5000A RMS.

Preface ............................................................................................................. i

Table of Contents .......................................................................................... iii

Chapter 1 Introduction................................................................................ 1-1

1.1 Receiving and Inspection....................................................................1-2

1.1.1 Nameplate Information................................................................ 1-2

1.1.2 Model Explanation ...................................................................... 1-2

1.1.3 Series Number Explanation ........................................................ 1-3

1.1.4 Drive Frames and Appearances ................................................. 1-3

1.1.5 Remove Instructions ................................................................... 1-5

1.2 Preparation for Installation and Wiring................................................1-5

1.2.1 Ambient Conditions..................................................................... 1-6

1.2.2 DC-bus Sharing: Connecting the DC-bus of the AC Motor Drives in

Parallel.................................................................................................

1.3 Dimensions.........................................................................................1-9

Chapter 2 Installation and Wiring ..............................................................2-1

2.1 Wiring .................................................................................................2-2

2.2 External Wiring ...................................................................................2-8

2.3 Main Circuit.........................................................................................2-9

2.3.1 Main Circuit Connection.............................................................. 2-9

2.3.2 Main Circuit Terminals .............................................................. 2-11

2.4 Control Terminals .............................................................................2-12

1-8

Chapter 3 Keypad and Start Up ..................................................................3-1

3.1 Description of the Digital Keypad ....................................................... 3-1

3.2 How to Operate the Digital Keypad .................................................... 3-3

3.3 Reference Table for the 7-segment LED Display of the Digital Keypad 34

3.4 Operation Method .............................................................................. 3-4

3.5 Trial Run ............................................................................................ 3-5

Chapter 4 Parameters..................................................................................4-1

4.1 Summary of Parameter Settings ........................................................ 4-2

4.2 Parameter Settings for Applications ................................................. 4-21

4.3 Description of Parameter Settings.................................................... 4-26

Chapter 5 Troubleshooting.........................................................................5-1

5.1 Over Current (OC).............................................................................. 5-1

5.2 Ground Fault ...................................................................................... 5-2

5.3 Over Voltage (OV).............................................................................. 5-2

5.4 Low Voltage (Lv) ................................................................................ 5-3

5.5 Over Heat (OH1) ................................................................................ 5-4

5.6 Overload ............................................................................................ 5-4

5.7 Keypad Display is Abnormal .............................................................. 5-5

5.8 Phase Loss (PHL) .............................................................................. 5-5

5.9 Motor cannot Run............................................................................... 5-6

5.10 Motor Speed cannot be Changed .................................................... 5-7

5.11 Motor Stalls during Acceleration....................................................... 5-8

5.12 The Motor does not Run as Expected.............................................. 5-8

5.13 Electromagnetic/Induction Noise...................................................... 5-9

5.14 Environmental Condition...................................................................5-9

5.15 Affecting Other Machines ...............................................................5-10

Chapter 6 Fault Code Information and Maintenance................................ 6-1

6.1 Fault Code Information .......................................................................6-1

6.1.1 Common Problems and Solutions............................................... 6-1

6.1.2 Reset .......................................................................................... 6-5

6.2 Maintenance and Inspections .............................................................6-5

Appendix A Specifications ........................................................................ A-1

Appendix B Accessories ........................................................................... B-1

B.1 All Brake Resistors & Brake Units Used in AC Motor Drives............. B-1

B.1.1 Dimensions and Weights for Brake Resistors ............................ B-4

B.2 No Fuse Circuit Breaker Chart .......................................................... B-7

B.3 Fuse Specification Chart ................................................................... B-8

B.4 AC Reactor........................................................................................ B-9

B.4.1 AC Input Reactor Recommended Value..................................... B-9

B.4.2 AC Output Reactor Recommended Value..................................B-9

B.4.3 Applications .............................................................................. B-10

B.5 Zero Phase Reactor (RF220X00A) ................................................. B-12

B.6 Remote Controller RC-01................................................................ B-13

B.7 PU06 ............................................................................................... B-14

B.7.1 Description of the Digital Keypad VFD-PU06 ...........................B-14

B.7.2 Explanation of Display Message...............................................B-14

B.7.3 Operation Flow Chart ...............................................................B-15

B.8 Fieldbus Modules ............................................................................ B-16

B.8.1 DeviceNet Communication Module (CME-DN01) .....................B-16

B.8.1.1 Panel Appearance and Dimensions ..................................B-16

B.8.1.2 Wiring and Settings ...........................................................B-16

B.8.1.3 Power Supply ....................................................................B-17

B.8.1.4 LEDs Display.....................................................................B-17

B.8.2 LonWorks Communication Module (CME-LW01) .....................B-17

B.8.2.1 Introduction .......................................................................B-17

B.8.2.2 Dimensions .......................................................................B-17

B.8.2.3 Specifications ....................................................................B-18

B.8.2.4 Wiring ................................................................................B-18

B.8.2.5 LED Indications .................................................................B-18

B.8.3 Profibus Communication Module (CME-PD01).........................B-19

B.8.3.1 Panel Appearance.............................................................B-19

B.8.3.2 Dimensions .......................................................................B-20

B.8.3.3 Parameters Settings in VFD-EL ........................................B-20

B.8.3.4 Power Supply ....................................................................B-20

B.8.3.5 PROFIBUS Address..........................................................B-20

B.8.4 CME-COP01 (CANopen) ..........................................................B-21

B.8.4.1 Product Profile...................................................................B-21

B.8.4.2 Specifications ....................................................................B-21

B.8.4.3 Components......................................................................B-22

B.8.4.4 LED Indicator Explanation & Troubleshooting...................B-23

B.9 MKE-EP & DIN Rail ......................................................................... B-25

B.9.1 MKE-EP ....................................................................................B-25

B.9.2 DIN Rail: MKEL-DRA (Only for frame A)...................................B-26

Appendix C How to Select the Right AC Motor Drive.............................. C-1

C.1 Capacity Formulas ............................................................................C-2

C.2 General Precaution ...........................................................................C-4

C.3 How to Choose a Suitable Motor....................................................... C-5

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Chapter 1 Introduction

The AC motor drive should be kept in the shipping carton or crate before installation. In order to

retain the warranty coverage, the AC motor drive should be stored properly when it is not to be used

for an extended period of time. Storage conditions are:

CAUTION!

1. Store in a clean and dry location free from direct sunlight or corrosive fumes.

2. Store within an ambient temperature range of -20

3. Store within a relative humidity range of 0% to 90% and non-condensing environment.

4. Store within an air pressure range of 86 kPA to 106kPA.

5. DO NOT place on the ground directly. It should be stored properly. Moreover, if the surrounding

environment is humid, you should put exsiccator in the package.

6. DO NOT store in an area with rapid changes in temperature. It may cause condensation and

frost.

7. If the AC motor drive is stored for more than 3 months, the temperature should not be higher

than 30 °C. Storage longer than one year is not recommended, it could result in the degradation

of the electrolytic capacitors.

8. When the AC motor drive is not used for longer time after installation on building sites or places

with humidity and dust, it’s best to move the AC motor drive to an environment as stated above.

C to +60 °C.

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Chapter 1 Introduction|

1.1 Receiving and Inspection

This VFD-EL AC motor drive has gone through rigorous quality control tests at the factory before

shipment. After receiving the AC motor drive, please check for the following:

Check to make sure that the package includes an AC motor drive, the User Manual/Quick



Start and CD.

Inspect the unit to assure it was not damaged during shipment.



Make sure that the part number indicated on the nameplate corresponds with the part



number of your order.

1.1.1 Nameplate Information

Example for 1HP/0.75kW 3-phase 230V AC motor drive

AC Drive Model

Input Spec.

Output Frequency Range

Serial Number & Bar Code

Output Spec.

Software Version

1.1.2 Model Explanation

007

VFD

MODEL VFD007EL23A

INPUT :3PH 200-240V 50/60Hz 5.1A OUTPUT :3PH 0-240V 4.2A 1.6kVA 0.75kW/1HP FREQUENCY RANGE : 0.1~600Hz

007EL23A0T7140001

00.92

Version Type

A: Standard drive

Mains Input Voltage 11:115 phaseV 123:230 phaseV 3-

21: phase230V 143:460 phaseV 3 -

VFD-EL Series

Applicable motor capacity

002: 0.25 HP(0.2kW)

004: 0.5 HP(0.4kW)

015: 2 HP(1.5kW) 022: 3 HP(2.2kW)

037: 5 HP(3.7kW)

Series Name ( ariable requency rive)

VF D

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Chapter 1 Introduction|

1.1.3 Series Number Explanation

0170T007EL23A

Production number Production week Production year 2007 Production factory

230V 3-phase 1HP(0.75kW)

T: Taoyuan, W: Wujiang

Model

If the nameplate information does not correspond to your purchase order or if there are any problems, please contact your distributor.

1.1.4 Drive Frames and Appearances

0.25-2HP/0.2-1.5kW (Frame A) 1-5HP/0.75-3.7kW (Frame B)

Input terminals (R/L1, S/ L2, T/L3)

Digital keypad

Control board cover

Output terminals (U/T1, V/T2, W/T3)

Revision August 2008, 2ELE, V1.02 1-3

Input terminals cover (R/L1, S/L2, T/L3)

Digital keypad

Case body

Control board cover

Output terminals cover (U/T1, V/T2, W/T3)

Chapter 1 Introduction|

Internal Structure

RFI Jumper Location

Digital keypad

NPN/PNP

ACI/AVI

RS485 port (RJ- 45)

at the right side

NOTE

RFI jumper is near the input terminals as shown in the above figure and can be removed by taking

off screws.

Frame Power range Models

VFD002EL11A/21A/23A,

A 0.25-2hp (0.2-1.5kW)

B 1-5hp (0.75-3.7kW)

1-4 Revision August 2008, 2ELE, V1.02

VFD004EL11A/21A/23A/43A,

VFD007EL21A/23A/43A, VFD015EL23A/43A

VFD007EL11A, VFD015EL21A,

VFD022EL21A/23A/43A, VFD037EL23A/43A

Chapter 1 Introduction|

RFI Jumper

RFI Jumper: The AC motor drive may emit the electrical noise. The RFI jumper is used to suppress

the interference (Radio Frequency Interference) on the power line.

Main power isolated from earth:

If the AC motor drive is supplied from an isolated power (IT power), the RFI jumper must be cut off.

Then the RFI capacities (filter capacitors) will be disconnected from ground to prevent circuit damage

(according to IEC 61800-3) and reduce earth leakage current.

CAUTION!

1. After applying power to the AC motor drive, do not cut off the RFI jumper. Therefore,

please make sure that main power has been switched off before cutting the RFI jumper.

2. The gap discharge may occur when the transient voltage is higher than 1,000V. Besides,

electro-magnetic compatibility of the AC motor drives will be lower after cutting the RFI

jumper.

3. Do NOT cut the RFI jumper when main power is connected to earth.

4. The RFI jumper cannot be cut when Hi-pot tests are performed. The mains power and

motor must be separated if high voltage test is performed and the leakage currents are

too high.

5. To prevent drive damage, the RFI jumper connected to ground shall be cut off if the AC

motor drive is installed on an ungrounded power system or a high resistance-grounded

(over 30 ohms) power system or a corner grounded TN system.

1.1.5 Remove Instructions

Remove Front Cover

Step 1 Step 2

Remove Fan

1.2 Preparation for Installation and Wiring

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Chapter 1 Introduction|

1.2.1 Ambient Conditions

Install the AC motor drive in an environment with the following conditions:

Air Temperature:

Relative Humidity: <90%, no condensation allowed

Operation

Storage

Transportation

Pollution

Degree

Minimum Mounting Clearances

Atmosphere pressure: Installation Site Altitude:

Vibration:

Temperature: -20°C ~ +60°C (-4°F ~ 140°F)

Relative Humidity: <90%, no condensation allowed

Atmosphere pressure:

Vibration:

2: good for a factory type environment.

-10 ~ +50°C (14 ~ 122°F) for UL & cUL

-10 ~ +40°C (14 ~ 104°F) for side-by-side mounting

86 ~ 106 kPa

<1000m

<20Hz: 9.80 m/s2 (1G) max 20 ~ 50Hz: 5.88 m/s2 (0.6G) max

86 ~ 106 kPa

<20Hz: 9.80 m/s2 (1G) max 20 ~ 50Hz: 5.88 m/s2 (0.6G) max

Frame A Mounting Clearances

Option 1 (-10 to +50°C) Option 2 (-10 to +40°C)

120mm

m m

0 5

120mm

Air flow

120mm

m m

0 5

m m

0 5

120mm

m m

0 5

Air Flow

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Chapter 1 Introduction|

Frame B Mounting Clearances

Option 1 (-10 to +50°C) Option 2 (-10 to +40°C)

150mm

m m

0 5

150mm

m m

0 5

150mm

m m

0 5

150mm

m m

0 5

Air flow

Air Flow

CAUTION!

1. Operating, storing or transporting the AC motor drive outside these conditions may cause

damage to the AC motor drive.

2. Failure to observe these precautions may void the warranty!

3. Mount the AC motor drive vertically on a flat vertical surface object by screws. Other directions

are not allowed.

4. The AC motor drive will generate heat during operation. Allow sufficient space around the unit

for heat dissipation.

5. The heat sink temperature may rise to 90°C when running. The material on which the AC motor

drive is mounted must be noncombustible and be able to withstand this high temperature.

6. When AC motor drive is installed in a confined space (e.g. cabinet), the surrounding

temperature must be within 10 ~ 40°C with good ventilation. DO NOT install the AC motor drive

in a space with bad ventilation.

7. Prevent fiber particles, scraps of paper, saw dust, metal particles, etc. from adhering to the

heatsink.

8. When installing multiple AC more drives in the same cabinet, they should be adjacent in a row

with enough space in-between. When installing one AC motor drive below another one, use a

metal separation between the AC motor drives to prevent mutual heating.

Revision August 2008, 2ELE, V1.02 1-7

Chapter 1 Introduction|

Installation with Metal Separation Installation without Metal Separation

120mm

150mm

120mm

150mm

120mm

Frame A

Air flow

150mm

Frame B

120mm

Frame A

150mm

Frame B

1.2.2 DC-bus Sharing: Connecting the DC-bus of the AC Motor Drives in Parallel

1. This function is not for 115V models.

2. The AC motor drives can absorb mutual voltage that generated to DC bus when

deceleration.

3. Enhance brake function and stabilize the voltage of the DC bus.

4. The brake module can be added to enhance brake function after connecting in parallel.

5. Only the same power system can be connected in parallel.

6. It is recommended to connect 5 AC motor drives in parallel (no limit in horsepower).

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Chapter 1 Introduction|

power should be applied at the same time (only the same power system can be connected in parallel)

Power 208/220/230/380/440/480 (depend on models)

U V W U V W U V W U V W

Braking modules

IM IM IM IM

For frame A and B, terminal + (-) is connected to the terminal + (-) of the braking module.

1.3 Dimensions

(Dimensions are in millimeter and [inch])

H H1

Frame W W1 H H1 D Ø ØD

A 72.0[2.83] 59.0[2.32] 174.0[6.86] 151.6[5.97] 136.0[5.36] 5.4[0.21] 2.7[0.11]

B 100.0[3.94] 89.0[3.50] 174.0[6.86] 162.9[6.42] 136.0[5.36] 5.4[0.21] 2.7[0.11]

Revision August 2008, 2ELE, V1.02 1-9

Chapter 1 Introduction|

NOTE

Frame A: VFD002EL11A/21A/23A, VFD004EL11A/21A/23A/43A, VFD007EL21A/23A/43A,

VFD015EL23A/43A

Frame B: VFD007EL11A, VFD015EL21A, VFD022EL21A/23A/43A, VFD037EL23A/43A

1-10 Revision August 2008, 2ELE, V1.02

Chapter 2 Installation and Wiring

After removing the front cover, check if the power and control terminals are clear. Be sure to observe

the following precautions when wiring.

General Wiring Information



Applicable Codes

All VFD-EL series are Underwriters Laboratories, Inc. (UL) and Canadian Underwriters

Laboratories (cUL) listed, and therefore comply with the requirements of the National

Electrical Code (NEC) and the Canadian Electrical Code (CEC).

Installation intended to meet the UL and cUL requirements must follow the instructions

provided in “Wiring Notes” as a minimum standard. Follow all local codes that exceed UL

and cUL requirements. Refer to the technical data label affixed to the AC motor drive and

the motor nameplate for electrical data.

The "Line Fuse Specification" in Appendix B, lists the recommended fuse part number for

each VFD-EL Series part number. These fuses (or equivalent) must be used on all

installations where compliance with U.L. standards is a required.

CAUTION!

1. Make sure that power is only applied to the R/L1, S/L2, T/L3 terminals. Failure to comply may

result in damage to the equipment. The voltage and current should lie within the range as

indicated on the nameplate.

2. All the units must be grounded directly to a common ground terminal to prevent lightning strike

or electric shock.

3. Please make sure to fasten the screw of the main circuit terminals to prevent sparks which is

made by the loose screws due to vibration.

4. Check following items after finishing the wiring:

A. Are all connections correct?

B. No loose wires? C. No short-circuits between terminals or to ground?

Revision August 2008, 2ELE, V1.02 2-1

Chapter 2 Installation and Wiring|

DANGER!

1. A charge may still remain in the DC bus capacitors with hazardous voltages even if the power

has been turned off. To prevent personal injury, please ensure that the power is turned off and

wait ten minutes for the capacitors to discharge to safe voltage levels before opening the AC

motor drive.

2. Only qualified personnel familiar with AC motor drives is allowed to perform installation, wiring

and commissioning.

3. Make sure that the power is off before doing any wiring to prevent electric shock.

2.1 Wiring

Users must connect wires according to the circuit diagrams on the following pages. Do not plug a

modem or telephone line to the RS-485 communication port or permanent damage may result. The

pins 1 & 2 are the power supply for the optional copy keypad only and should not be used for RS-485

communication.

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Chapter 2 Installation and Wiring|

Figure 1 for models of VFD-EL Series

VFD002EL11A/21A, VFD004EL11A/21A, VFD007EL11A/21A, VFD015 EL21A, VFD022EL21A

brake resistor

(optional)

BUE

brake unit

Fuse/NFB(No Fuse Breaker)

R(L1)

S(L2)

Recommended Circuit when power supply is turned OFF by a fault output If the fault occurs, the contact will be ON to turn off the power and protect the power system.

Factory setting: NPN Mode

NPN

PNP

Please refer to Figure 3 for w iring of N PN mode and PNP mode.

Sw1

Factory setting: AVI M ode

AVI

ACI

Factory sett ing

Sw2

OFF

FWD/Stop

REV/Sto p

Multi-s tep 1

Multi-step 2

Multi-step 3

Multi-step 4

Digital Signal Common

Analog Signal Common

Main circuit (power) terminals

(optional)

+ R(L1) S(L2)

+24V

MI1 MI2 MI3 MI4 MI5 MI6

DCM

+10V

Power supply +10V/3mA

AVI /AC I

Master Frequency 0- 10V 47K /4-20mA

ACM

Control circuit terminals

U(T1)

V(T2)

W(T3)

Multi-function contact output Re fer t o ch apt er 2. 4 fo r de tai ls .

Factory setting is malfunction indication

AFM

ACM

Analog Multi-function Output Ter m in a l Refer to chapter 2.4 for details.

Analog Signal common

Factory setting: output frequency

RS-485

Seri al interf ace 1: Reserved 2: E V

3: GND 4: S G-

5: SG+ 6: Reserved 7: Reserved 8: Reserved

Shielded leads & Cable

Motor

Revision August 2008, 2ELE, V1.02 2-3

Chapter 2 Installation and Wiring|

Figur e 2 for model s of VFD-EL Series

VFD002EL2 3A, VFD004EL23A/43A, VFD007EL23A /43A, VFD015EL2 3A/43A, VFD022EL2 3A/43A, VFD037EL23A/43A

Fuse/NFB(No Fuse Breaker)

R(L1) S(L2)

T(L3)

Recommended Circuit when power supply is turned OFF by a fault output.

If the fault occurs, the contact will be ON to turn off the power and protect the power system.

Factory setting: NPN Mode

NPN

PNP

Please refer to Figure 3 fo r wir ing o f NPN mode and PNP mode.

Sw1

Factory setting

OFF

FWD/Stop

REV/Sto p

Multi-step 1

Multi-step 2

Multi-step 3

Multi-s tep 4

Digital Signal Common

+ R(L1) S(L2) T(L3) E

+24V

MI1 MI2 MI3 MI4 MI5 MI6

DCM

BUE

brake unit (optional)

brake resistor (o ptio nal)

U(T1)

V(T2)

W(T3)

AFM

ACM

Factory setting: AVI Mode

AVI

Sw2

ACI

Main circuit (power) terminals

Analog Signal Common

+10V

Power supply +10V/3mA

AVI/ACI

Master Frequency 0-10V 47K /4-20mA

ACM

Control circuit terminals

Motor

Multi-function contact output Refer to chapter 2.4 for details. Factory setting is malfunction indication

Analog Multi-function Output Terminal Refer to chapter 2.4 for details.

Analog Signal common

Factory setting: output frequency

RS-485

Serial interface 1: Reserved 2: E V 3: GND 4: S G- 5: SG+ 6: Reserved 7: Reserved 8:

Reserved

Shielded leads & Cable

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Chapter 2 Installation and Wiring|

Figure 3 Wiring for NPN mode and PNP mode

A. NPN mode without external power

NPN

PNP

Factory setting

B. NPN mode with external power

NPN

PNP

Factory setting

C. PNP mode without external power

NPN

Sw1

PNP

Factory setting

24 Vdc

Revision August 2008, 2ELE, V1.02 2-5

Chapter 2 Installation and Wiring|

D. PNP mode with external power

NPN

Sw1

PNP

Factory setting

24 Vdc

CAUTION!

1. The wiring of main circuit and control circuit should be separated to prevent erroneous actions.

2. Please use shield wire for the control wiring and not to expose the peeled-off net in front of the

terminal.

3. Please use the shield wire or tube for the power wiring and ground the two ends of the shield

wire or tube.

4. Damaged insulation of wiring may cause personal injury or damage to circuits/equipment if it

comes in contact with high voltage.

5. The AC motor drive, motor and wiring may cause interference. To prevent the equipment

damage, please take care of the erroneous actions of the surrounding sensors and the

equipment.

6. When the AC drive output terminals U/T1, V/T2, and W/T3 are connected to the motor terminals

U/T1, V/T2, and W/T3, respectively. To permanently reverse the direction of motor rotation,

switch over any of the two motor leads.

7. With long motor cables, high capacitive switching current peaks can cause over-current, high

leakage current or lower current readout accuracy. To prevent this, the motor cable should be

less than 20m for 3.7kW models and below. And the cable should be less than 50m for 5.5kW

models and above. For longer motor cables use an AC output reactor.

8. The AC motor drive, electric welding machine and the greater horsepower motor should be

grounded separately.

9. Use ground leads that comply with local regulations and keep them as short as possible.

10. No brake resistor is built in the VFD-EL series, it can install brake resistor for those occasions

that use higher load inertia or frequent start/stop. Refer to Appendix B for details.

11. Multiple VFD-EL units can be installed in one location. All the units should be grounded directly

to a common ground terminal, as shown in the figure below. Ensure there are no ground

loops.

2-6 Revision August 2008, 2ELE, V1.02

Chapter 2 Installation and Wiring|

Excellent

Good

Not allowed

Revision August 2008, 2ELE, V1.02 2-7

Chapter 2 Installation and Wiring|

2.2 External Wiring

Power Suppl

EMI Filter

R/L1

U/T1 V/T2

S/L2

Motor

T/L3

W/T3

FUSE/NFB

Magnetic cont actor

Input AC Line Reactor

Zero-phase Reactor

Outpu t AC Line Reactor

Brak unit

Brak e resi stor

BUE

Items Explanations

Power supply

Please follow the specific power supply requirements shown in Appendix A.

There may be an inrush current

Fuse/NFB

(Optional)

during power up. Please check the chart of Appendix B and select the correct fuse with rated current. Use of an NFB is optional.

Magnetic contactor (Optional)

Please do not use a Magnetic contactor as the I/O switch of the AC motor drive, as it will reduce the operating life cycle of the AC drive.

Used to improve the input power factor, to reduce harmonics and provide protection from AC line

Input AC Line Reactor (Optional)

disturbances. spikes, short interruptions, etc.). AC line reactor should be installed when the power supply capacity is 500kVA or more or advanced capacity is

(surges, switching

activated. The wiring distance should be

10m. Refer to appendix B for

≤

details. Zero phase reactors are used to

Zero-phase Reactor (Ferrite Core Common Choke) (Optional)

reduce radio noise especially when audio equipment is installed near the inverter. Effective for noise reduction on both the input and output sides. Attenuation quality is good for a wide range from AM band to 10MHz. Appendix B specifies the zero phase reactor. (RF220X00A)

It is used to reduce electromagnetic

EMI filter

interference. All 230V and 460V models are built-in EMI filter.

Brake Resistor and Brake Unit (Optional)

Output AC Line Reactor (Optional)

Used to reduce the deceleration time of the motor. Please refer to the chart in Appendix B for specific Brake Resistors.

Motor surge voltage amplitude depends on motor cable length. For applications with long motor cable (>20m), it is necessary to install a

2-8 Revision August 2008, 2ELE, V1.02

Chapter 2 Installation and Wiring|

2.3 Main Circuit

2.3.1 Main Circuit Connection

No fuse breaker ( NFB)

R S

Brake Resistor(Optional)

R(L1) S(L2) T(L3)

BUE

Brake Unit (Op tiona l)

U(T1)

V(T2)

W(T3)

Motor

IM 3~

Terminal Symbol Explanation of Terminal Function

R/L1, S/L2, T/L3

U/T1, V/T2, W/T3

+, -

AC line input terminals (1-phase/3-phase)

AC drive output terminals for connecting 3-phase induction motor

Connections for External Brake unit (BUE series)

Earth connection, please comply with local regulations.

CAUTION!

Mains power terminals (R/L1, S/L2, T/L3)

Connect these terminals (R/L1, S/L2, T/L3) via a non-fuse breaker or earth leakage



breaker to 3-phase AC power (some models to 1-phase AC power) for circuit protection. It

is unnecessary to consider phase-sequence.

It is recommended to add a magnetic contactor (MC) in the power input wiring to cut off



power quickly and reduce malfunction when activating the protection function of AC motor

drives. Both ends of the MC should have an R-C surge absorber.

Please make sure to fasten the screw of the main circuit terminals to prevent sparks



which is made by the loose screws due to vibration.

Revision August 2008, 2ELE, V1.02 2-9

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