TECO N3 Series User manual

N3 INVERTER SERIES
Operating Manual
230V 1Ø 0.5 - 3HP
0.4 - 2.2kW
230V 3Ø 0.5 - 40HP
0.4 –30kW
460V 3Ø 1 - 75HP
0.75 –55kW
Revision: 2.03.05

N3 Drive Operations Manual
Table of Contents
Table of Contents
1.0 Introduction.....................................................................................................................................1
2.0 Product Inspection.........................................................................................................................2
2.1 Nameplate Layout ......................................................................................................................2
3.0 Operating Precautions...................................................................................................................3
3.1 Before Power up.........................................................................................................................3
3.2 During Power up.........................................................................................................................4
3.3 Before Operation ........................................................................................................................4
3.4 During Operation ........................................................................................................................5
4.0 Environment and Installation ........................................................................................................6
4.1 Inverter Mounting........................................................................................................................6
Fig.4.1.1 Panel and Enclosure Placement .....................................................................................6
Fig 4.1.2 Din Rail Mounting Clearances.........................................................................................7
5.0 General Wiring Diagram (1 - 2 HP)................................................................................................8
6.0 General Wiring Diagram (3 - 75 HP)..............................................................................................9
7.0 Power Terminals Designations and Ratings (Terminal Block TM1)........................................10
7.1 Power Terminal Configuration TM1..........................................................................................10
7.2 Power Terminal Block TM1 Electrical Ratings and Tightening Torques..................................11
8.0 Inverter Wiring ..............................................................................................................................11
8.1 Input / Output Power Wiring Connections (Terminal TM1) ......................................................11
8.2 Input / Output Power Wiring Noise Suppression......................................................................11
Fig. 8.2 Input / Output Power Wiring Noise Suppression.............................................................11
8.3 Motor Cable Length..................................................................................................................12
8.4 Cable Length vs Carrier Frequency .........................................................................................12
8.5 Inverter Grounding....................................................................................................................12
8.6 Input Power Wiring and Installation Recommendations with Examples ..................................13
Fig. 8.6 Input Power Wiring and Installation Examples................................................................13
9.0 Input / Output Power Section Block Diagram............................................................................14
Fig. 9.0 Power Input / Output Block Diagrams.............................................................................14
10.0 Control Terminals (Terminal Block TM2) .................................................................................15
10.1 Control Terminal Designations (Terminal Block TM2) ..........................................................15
10.2 Control Terminal Layout and Control Switches.....................................................................16
Fig. 10.2.1 Control Terminal TM2 Layout................................................................................16
Fig. 10.2.2 Control Terminal TM2 Layout (Prior to Version 1.3) .............................................16
10.3 Control Terminal Wiring and Connections (Terminal TM2)..................................................16
11.0 Peripheral Power Devices..........................................................................................................17
12.0 Input Fuse Types and Ratings ...........................................................................................18 - 19
13.0 Applicable specifications for circuit breakers and magnetic contactors.............................19
14.0 Reactor Input / Output Specifications ......................................................................................20
15.0 Braking Unit and Braking Resistor Selections........................................................................21
16.0 EMC Filters..................................................................................................................................22
17.0 Keypad Key Functions and Navigation....................................................................................23
17.1 N3 Keypad.............................................................................................................................23
17.2 Keypad LED Functions..........................................................................................................23
17.3 Key Functions........................................................................................................................24
17.4 Keypad Navigation ................................................................................................................25
17.4.1 Basic Keypad Control .................................................................................................25
17.4.2 Local / Remote Function..............................................................................................25
17.4.3 Setting Parameters b(Basic) and A(Advanced)........................................................26
18.0 Control Mode Selection .............................................................................................................27
Cont.

N3 Drive Operations Manual
Table of Contents Cont.
19.0 b (Basic) and A (Advanced)parameters defined ....................................................................28
19.1 b (Basic) Parameter Summary.......................................................................................28 - 29
19.2 b(Basic) Parameter Details ...........................................................................................30 - 33
19.3 A(Advanced) Parameter Summary...............................................................................34 - 46
19.4 A(Advanced) Parameter Details....................................................................................47 - 81
20.0 Option Modules and Cables ......................................................................................................82
Fig. 20.1 Remote Keypad..............................................................................................................82
Fig. 20.2 Remote Keypad Mounting Dimensions..........................................................................83
Fig. 20.3 RS485 Interface P/N SIF-485.........................................................................................83
Fig. 20.4 RS232 Interface P/N SIF-232.........................................................................................84
Fig. 20.5 Copy Module P/N SIF-MP..............................................................................................84
21.0 Error Display Codes...................................................................................................................85
21.1 Unresettable / Unrecoverable Errors.....................................................................................85
21.2 Automatically and Manually Recoverable Errors............................................................85 - 86
21.3 Manually Recoverable Errors Only (no auto-restart).............................................................87
21.4 Set –up Configuration and Interface Errors....................................................................86 - 88
21.5 Keypad Errors.................................................................................................................88 - 89
22.0 Troubleshooting .........................................................................................................................89
22.1 General troubleshooting ........................................................................................................90
Flow Charts:...........................................................................................................................91 - 97
Fig. 22.1 Fault display troubleshooting.................................................................................91 - 92
Fig. 22.2 OC and OL fault troubleshooting..................................................................................93
Fig. 22.3 OV and LV fault troubleshooting ..................................................................................94
Fig. 22.4 Motor will not run ..........................................................................................................95
Fig. 22.5 Motor overheating.........................................................................................................96
Fig. 22.6 Instability.......................................................................................................................96
23.0 Routine periodic inspection ......................................................................................................97
Appendix A –Specifications .............................................................................................................A1
AA.1 General Specifications.................................................................................................A1 –A2
AA.2 Product (Model) Specifications....................................................................................A3 –A4
Appendix B - Motor Internal Data List ..............................................................................................B1
Appendix C - N3 Envelope Dimensions and Weight Table vs Model No..................................... C1
Appendix D –N3 Cover Removal Procedure for Various Frame Sizes.................................D1 –D2
AD.1 Frame sizes 1 & 2................................................................................................................ D1
AD.2 Frame size 3........................................................................................................................ D1
AD.3 Frame size 4........................................................................................................................ D2
AD.4 Frames sizes 5 & 6 ............................................................................................................. D2
Appendix E- EMC Filter Dimensions ....................................................................................... E1 –E3
AE.1 FS Type ................................................................................................................................E1
AE.2 KMF Type .............................................................................................................................E2
AE.3 JUN Type..............................................................................................................................E3
Appendix F- Inverter Parameter Setting List ...................................................................................F1
Appendix G- Version 1.3 Changes.......................................................................................... G1 –G2

N3 Drive Operations Manual
Introduction & Safety 1
1.0 Introduction
The N3 Inverter series is state of the art design using the latest control and power technologies. It is designed to
operate and control 3Ø induction motors in the hp range of 0.5 to 75 hp and voltage class of 230 or 460VAC. The
inverter can operate in the open loop vector, variable torque, or V/F mode; settable via programming. There are two
sets of parameters: bBasic, and AAdvanced, allowing for flexible control in many different applications. The
membrane keypad in combination with a 3 digit 7 segment display allows for ease of programming and monitoring.
An optional communications module can be used for control and parameter setting using the MODBUS RTU protocol.
The N3 has been designed with easy access to the input power, output motor, and control terminals.
Before proceeding with the set-up and installation please take time to review this manual to ensure proper operation
and above all else, personnel safety. Should there be any problem in using the product that cannot be resolved with
the information provided in the manual, please contact your nearest TECO distributor or sales representative for
assistance.
SAFETY FIRST!
The inverter is an electrical product. For your safety, there are symbols “Danger” and “Caution” in this manual as a
reminder to pay attention to safety instructions on handling, installing, operating, and troubleshooting the inverter. Be
sure to follow the instructions for maximum safety.
!
DANGER - Indicates a potential hazard that could cause death
or serious personal Injury.
!
CAUTION - Indicates that the inverter or the mechanical system
might be damaged.
!
DANGER
Do not touch any circuit boards or components while the charge indicator is still on
after power is turned off. Wait until the charge indicator lamp is completely
extinguished. NOTE: The charge indicator lamp is located under the digital
operator
Do not connect or disconnect any wiring while power is present.
Do not test parts and signals on the circuit boards during the inverter operation.
Do not disassemble the inverter and modify any internal wires, circuits, or parts.
Ensure that the ground terminal of the inverter is bonded properly to earth ground.
For 200V class, ground to <100 Ω. For 400v class, ground to <10Ω.
!
CAUTION
Do not perform high voltage dielectric tests on any inverter parts, as damage to
these parts may can result.
Do not connect the AC input power supply to the motor terminals T1 (U), T2 (V),
and T3 (W) of the inverter.
Do not touch any circuit board without proper precautions as the CMOS ICs on the
inverter’s control board can be damaged due to static electricity.

N3 Drive Operations Manual
Product inspection & Nameplate Layout 2
2.0 Product Inspection
TECO’s inverters have all passed a functional factory test before delivery. Please check the following when you
receive and unpack the inverter:
Check for any damages that may have occured during transportation or handling. If there is damage, do not
apply power, and contact a TECO sales representative.
Check that the model and capacity of the inverter are the same as those specified in your purchase order. The
following describes the nameplate information.
Input
Specification
Output
Specification
Model and
Motor Rating
CAUTION
Enclosure Type and Rating
: xxxxxxxxxxxx
: xxHP/xxkW
: AC x phase 50/60 Hz
: xxx-xxxV (+10%,-15%)
: xx.x A
: AC 3 phases 0-400 Hz
: 0 –xxxV
: xx.x A
Model
Motor Rating
INPUT
VOLTAGE
Amps
OUTPUT
VOLTAGE
Amps
2.1 Nameplate Layout
NOTES:

N3 Drive Operations Manual
Operating Precautions; Before Power UP 3
3.0 Operating Precautions
3.1 Before Power Up
!
CAUTION
The input voltage must comply with the inverter’s specified input voltage.(See
product nameplate)
!
CAUTION
To avoid the front cover from disengaging or other physical damage, do not
carry the inverter by its cover. Support the unit by its heat sink when
transporting. Improper handling can damage the inverter or injure personnel,
and should be avoided.
To avoid the risk of fire, do not install the inverter on or near flammable
objects. Install on nonflammable objects such as metal surfaces.
If several inverters are placed in the same control panel, provide adequate
ventilation to keep the temperature below 40°C (104°F) to avoid overheating
or fire.
When removing or installing the digital operator, turn off the power first, and
then follow the instructions in this manual to avoid operator error or loss of
display caused by faulty connections.
Warning
This product is sold subject to IEC 61800-3. In a domestic environment this
product may cause radio interference in which case the user may be required to
apply corrective measures.
!
CAUTION
To ensure the safety of peripheral devices, it is strongly recommended to install a
fast acting fuse on the power input side of the inverter. The specifications for fast
acting fuses are covered in Section 12.0.
!
DANGER
Make sure the applied voltage input connections are correct, L1 (L), L2, and
L3 (N) are power-input terminals and must not be connected to T1, T2, and T3.
Otherwise, inverter damage can result.

N3 Drive Operations Manual
Operating Precautions; During Power UP & Before Operation 4
3.2 During Power up
!
DANGER
Do not connect or disconnect any wiring on the inverter as bodily harm and /
or damage to the equipment may result.
When momentary power loss is greater than 2 seconds (the higher the HP
rating, the longer the time), the inverter can not sustain power to the control
circuit. Therefore, when power is restored, the operation of the inverter is
based on the setup of b000 / A015 and the condition of the external switches.
This is considered to be a restart.
When restarting, the operation of the inverter is based on the setup of
b000 and A015 and the condition of external switch (FWD / REV button).
NOTE: the start operation is not affected by parameters
A013/A014/A018/A019.
1. When b000=0000, the inverter will not run after restart.
2. When b000=0001 and the external (FWD / REV) switch is off, the
inverter will not run after restart.
3. When b000=0001, the external switch (FWD / REV button) is on, and
A015=0000, the inverter will run automatically after restart. In this case
after loss of power, turn off the external (FWD/REV) switch to avoid
damage to the equipment and injury to personnel after sudden
restoration of power.
For further information, please refer to the description and warnings of
parameter A015 covered in the advanced parameter section.
When the momentary power loss is less than 2seconds, the inverter still has
enough storage power to support the control the circuit. Therefore, when
power is restored, the inverter will automatically restart depending on the setup
of A013 / A014.
!
CAUTION
Below situations are normal:
1. The inverter display will flash the AC input voltage for 1 second after power is applied.
2. After power is off, the inverter display will flash "LV" for 1 second when the inverter
is at Stop status and the inverter display will flash "LV-C" for 1 second when the
inverter is at Run status.
3.3 Before Operation
!
DANGER
Make sure only qualified personnel familiar with AC drives and having a full
understanding on parameter settings allowed to operate the equipment.

N3 Drive Operations Manual
Operating Precautions; During Operation 5
3.4 During Operation
!
DANGER
Do not connect or disconnect the motor during operation. The overcurrent circuit
will cause the inverter to trip or damage the equipment may result.
!
DANGER
Do not remove any protective covers as lethal voltages are present inside
the inverter.
The motor will restart automatically after stop when the auto-restart function is
on. In this case, use extreme caution while working near the motor or driven
equipment.
Note: The stop function is different from the emergency stop switch, which
must be set first to be effective.
!
CAUTION
Do not touch heat-generating components such as heat sinks and braking
resistors.
The inverter can operate the motor from low speed to high speed. Verify that
the allowable speed range of the associated machinery will tolerate this range.
Note the settings related to the `minimum braking resistor value.
Do not check signals on circuit boards while the inverter is operating.
!
CAUTION
After power is removed from the inverter, allow 5 minutes before disassembling or
checking any components or disconnecting wiring. The charge indicator lamp
which is located under the digital operator should not be illuminated.

N3 Drive Operations Manual
Environment & Installation; Inverter Mounting 6
4.0 Environment and Installation
The environment will directly affect the proper operation and the life span of the inverter. To ensure that the inverter
will give maximum service life, please comply with the following environmental conditions:
4.1 Inverter Mounting
When mounting and installing one or more inverters on a panel or in an enclosure, ensure that the placements and
clearances are correct. (see Fig.’s 4.1.1 and 4.1.2). Also make sure that the inverter(s) are mounted vertically to
maximize air flow to the heatsink. To further increase airflow, the dust cover on the inverter(s) may be removed,
provided that the environment is free from contaminants.
PANEL
Correct
Fan Fan
Enclosure Enclosure
PANEL
Incorrect
Correct
Incorrect
N3
N3
N3
N3
N3 N3
Panel Mounting Enclosure Mounting
Fig. 4.1.1 Panel and Enclosure Placements
Cont.
Ambient Temperature: 14 -104oF (-10oC - +40oC),
Without Cover: 14-122oF (-10oC - +50oC)
Relative Humidity: 95% non-condensing
Altitude : < 3,281 ft. (1000m)
Avoid exposure to rain or moisture.
Avoid direct sunlight.
Avoid oil mist and salinity.
Avoid corrosive liquid and gas.
Avoid dust, lint fibers, and small metal
filings.
Keep away from radioactive and
flammable materials.
Avoid electromagnetic interference (soldering machines, power machines).
Avoid vibration (stamping, punching machines etc.). Add a vibration-proof pad if the
situation cannot be avoided.
If several inverters are placed in the same control panel, provide a heat removal means
to maintain ambient temperatures below 40oC.

N3 Drive Operations Manual
Environment & Installation; Inverter Mounting Cont. 7
N3
FRONT
2.0 in
2.0 in
4.8 in
4.8 in
2.0 in
N3
Fig. 4.1.2 Mounting Clearances
NOTES:

N3 Drive Operations Manual
N3 General Wiring Diagram.( All HP’s prior to Ver.1.3) 8
5.0 General Wiring Diagram 1 - 2 HP
T1(U)
T2(V)
T3(W)
L1(R)
L2(S)
L3(T)
RUN / STOP S1
S2
S3
S4
S5
3 Ø
INDUCTION MOTOR
MULTIFUNCTION
DIGITAL INPUTS
(See parameters A050 –A057)
+10V
AIN / S7
COM (0V)
E
E
R1A
R1B
R1C
R2A
R2C
N3
INVERTER
SHIELD
SHIELD
N3 General Wiring Diagram
1 - 2 HP and (3-75 HP prior to Version 1.3)
0 - 10 VDC
ANALOG
OUTPUT
(See parameters
A103 & A104)
MULTIFUNCTION RELAY
OUTPUTS
Dry contacts rated
(250 VAC / 30 VDC @ 2A)
(See parameters A105 & A106)
+24V
COM
RUN / STOP or REV / FWD
For SOURCE mode connect
to +24V and set SW1 to the
PNP position.
For SINK mode connect to
COM and set SW1 to the NPN
position. (Factory Default)
+FM
COM
S6 / AI2
(0V)
(0V)
SW1
NPN
PNP
SW3
I
V
SW2
BR
DC Choke Braking
Resistor
P1
Braking
Resistor
P
_B1/P B2
DC Power
Supply
_
DC Power Supply
or
External Braking Unit
+
230V: 0.5 –10 HP
460V: 1 –15 HP
230V: 15 –20 HP
460V: 20 HP
230V: 25 –40 HP
460V: 25 –75 HP NOTE -
GROUND CONNECTION
RESISTANCE TO BE -
230V CLASS: ≤100Ω
460V CLASS: ≤10Ω
PE
E
E
Ground Terminal
Designation
TERMINAL DESIGNATIONS FOR
POWER DEVICE INPUTS FOR
VARIOUS HORSEPOWER.
(See Sec. 7.0 for further details)
CON 1 CON 2 OPTION CARD
CONNECTOR
TM2
TM2
(See Sec. 10.0 for further details)
S5 can be configured for pulse
input. ( A054 = 0019) (See
also parameter A098)
The AIN / S7 input terminal can be
configured as an Analog input:
SW2 = V (0-10VDC) or *(2 - 10VDC)
SW2 = I (0 - 20 mA) or *(4 - 20 mA)
*(See Note)
AIN/S7 can also be configured as a
digital input .
Example –An external pot is
connected to the AIN terminal as
shown providing 0 - 10 VDC input
2K
L1(R) L2(S) L3(T)
Magnetic
Contactor
MCCB
AC
Reactor
Fast Acting
Fuses
PE
PE
S6 / AI2 can be configured as a digital
or analog input.
SW3 = V (0-10VDC) or (2 - 10VDC)
SW3 = I (0 - 20 mA) or (4 - 20 mA)
(See parameters *A049, (A050 –A056),
A097 & A154)
*A049 –Version 1.3 or later)
*Note: For versions prior to 1.3, to set AIN (2-10V) or
(4-20mA), parameters A92-A96 were used. For
versions 1.3 or higher it can be set directly with
parameter A154. Also see parameters A050 - A056.
AC Input Voltage

N3 Drive Operations Manual
N3 General Wiring Diagram (3-75 HP Ver.1.3 or later) 9
6.0 General Wiring Diagram 3 –75 HP*
T1(U)
T2(V)
T3(W)
L1(R)
L2(S)
L3(T)
RUN / STOP S1
S2
S3
S4
S5
3 Ø
INDUCTION MOTOR
MULTIFUNCTION
DIGITAL INPUTS
(See parameters A050 –A057)
AI2
AIN / S7
E
E
R1A
R1B
R1C
R2A
R2C
N3
INVERTER
SHIELD
SHIELD
N3 General Wiring Diagram
3 –40 HP at 230V and 3 –75 HP at 460V (Version 1.3 or later)
0 - 10 VDC
ANALOG
OUTPUT
(See parameters
A103 & A104)
MULTIFUNCTION RELAY
OUTPUTS
Dry contacts rated
(250 VAC / 30 VDC @ 2A)
(See parameters A105 & A106)
+24V
24G
RUN / STOP or REV / FWD
For SOURCE mode connect
to +24V and set SW1 to the
PNP position.
For SINK mode connect to
COM and set SW1 to the NPN
position. (Factory Default)
+FM
AGND
S6
SW1
NPN
PNP
SW3
I
V
SW2
Braking
Resistor
_B1/P B2
DC Power
Supply
_
DC Power Supply
or
External Braking Unit
+
230V: 25 –40 HP
460V: 25 –75 HP
230V: 15 –20 HP
460V: 20 HP NOTE -
GROUND CONNECTION
RESISTANCE TO BE -
230V CLASS: ≤100Ω
460V CLASS: ≤10Ω
E
E
Ground Terminal
Designation
TERMINAL DESIGNATIONS FOR
POWER DEVICE INPUTS FOR
VARIOUS HORSEPOWER.
(See Sec. 7.0 for further details)
CON 1 CON 2 OPTION CARD
CONNECTOR
TM2
TM2
(See Sec. 10.0 for further details)
S5 can be configured for pulse
input. ( A054 = 0019) (See
also parameter A098)
The AIN / S7 input terminal
can be configured as an
Analog input:
SW2 = V (0 -10VDC)
SW2 = I (0 - 20mA)
AIN / S7 can also be
configured as a digital input.
(see parameters A056, (A092
–A096) & A154)
Example –An external pot is
connected to the AIN terminal as
shown providing 0 - 10 VDC input
2K
L1(R) L2(S) L3(T)
Magnetic
Contactor
MCCB
AC
Reactor
Fast Acting
Fuses
AGND
3 –40 HP at 230V
&
3 –75 HP at 460V
AC Input Voltage
AI2 Analog input input terminal:
SW3 = V (0 -10VDC) or (0 - 20mA)
SW3 =I (2-10VDC) or (4-20 mA)
(Ver. 1.3 or later)
(See parameters A049, A097, (A050
–A056) & A154)
*. For 3 - 75HP prior to Version 1.3. please refer to Wiring Diagram 5.0

N3 Drive Operations Manual
Power Terminal Designations & Ratings (TM1) 10
7.0 Power Terminals Designations and Ratings (Terminal Block TM1)
Depending on inverter ratings, the power terminals (TM1) can have one of three configurations. These are shown as
A), B), C) and D) in Fig. 7.1. Section 7.2 covers the electrical ratings and tightening torques of the terminals.
Do Not over tighten terminal screws. (See Sec. 7.2)
Use the proper wire size for terminal connections.
Use proper termination techniques.
7.1 Power Terminal Configuration TM1
R/L1 S/L2 T/L3 B1/P
_B2 UT1 VT2 WT3
Power Dynamic To Motor
230V 3Ø: 15 –20 HP
460V 3Ø: 20 HP
R/L1 S/L2 T/L3 _UT1 VT2 WT3
+
230V 3Ø : 25 - 40 HP
460V 3Ø : 25 - 75 HP
Fig.7.1 Power Terminal Configuration TM1
Terminal Connections
R/L1 –S/L2 –T/L3
U/T1 –V/T2 –W/T3
B1/P –B2
B1/P –_
Terminal Connections
–_
+External DC Supply
Or External Braking
Unit.
230V 3Ø: 0.5 –2 HP
460V 3Ø: 1 –2 HP
230V 1Ø: 0.5 –1 HP
Terminal Connections
(L) –(N)
L1 –L2 –L3
T1 –T2 –T3
P1 –BR
P1 –P *
PE
A)
C)
D) TM1
TM1
TM1
Do Not remove the
Factory Installed
Jumper between
Terminals P –P1
unless a DC reactor
is being installed.
CAUTION
230V 3Ø: 0.5 –2 HP
460V 3Ø: 1 –2 HP
230V 1Ø: 0.5 –1 HP
3Ø Motor Output
Braking Resistor Connection
DC Reactor Connections
Earth Ground
3Ø Input Power
3Ø Motor Output
Braking Resistor
External DC Supply
R/L1 –S/L2 –T/L3
U/T1 –V/T2 –W/T3
3Ø Input Power
3Ø Motor Output
L1(L) L2 L3(N) T1 T2 T3
PEPE BRP P1
(L) –(N)
L1 –L2 –L3
T1 –T2 –T3
P1 –BR
P1 –P *
230V 3Ø: 3 –10 HP
460V 3Ø: 3 –15 HP
230V 1Ø: 2 –3 HP
3Ø Motor Output
Braking Resistor Connection
DC Reactor Connections
Terminal Connections
L1 L2 L3(N) P1 BR T1 T2 T3
Power Dynamic To Motor
P
TM1
230V 3Ø: 3 –10 HP
460V 3Ø: 3 –15 HP
230V 1Ø: 2 –3 HP
B) Do Not remove the Factory Installed Jumper between
Terminals P –P1 unless a DC reactor is being installed.
CAUTION
!
!
*
*

N3 Drive Operations Manual
Power Terminal Designations & Ratings (TM1) Cont. & Inverter Wiring 11
7.2 Power Terminal Block TM1 Electrical Ratings and Tightening Torques
Table7.1 Electrical Ratings and Tightening Torques
Horsepower
Phase
Ø
Power source
Volts
Amps
Tightening Torque
Lb-ft / KG-M
Lb-in / KG-CM
0.5 & 1
1
200-240V
600
15A
0.59 / 0.08
7.10 / 8.20
2
3
1& 2
3
380-480V
3, 5, 7.5, 10 &15
3
200-240V
40A
1.5 / 0.21
18.00 / 20.28
2 & 3
1
3, 5, 7.5, 10 &15
3
380-480V
15,20, & 25
3
200-240V
80A
1.84 / 0.3
22.1 / 30
20,25, & 30
3
380-480V
60A
30
3
200-240V
100A
4.42 / 0.66
53.1 / 66
40 & 50
3
380-480V
40
3
200-240V
150A
60 & 75
3
380-480V
8.0 Inverter Wiring
8.1 Input / Output Power Wiring Connections (Terminal TM1)
Table 8.1 Input / Output Power Wire Size vs Horsepower
Inverter Input
Voltage
Horsepower
240 V
0.5,1, & 2
3 & 5
7.5 & 10
X
15, 20, &
25
30
40
480 V
1, 2, 3, & 5
7 & 10
15
20 , 25 & 30
X
40 & 50
60 & 75
*AWG / mm2
#14 / 2.0
#12 / 3.5
#10 / 5.5
#6 / 14
#4 / 22
#2 / 30
#1 /50
* Wire size shown is based on maximum terminal size. Please consult the NEC or local
codes for the proper size to be used.
Use only copper wires. Proper diameter wire should be based on ratings at +105°C.
The minimum voltage rating of wiring is: 300V for 230VAC and 600V for 460VAC.
For safety reasons do not use under sized wiring.
8.2 Input / Output Power Wiring Noise Suppression
Electrical noise or EMI can be generated from the input power lines and or the output power leads to the motor.
This can interfere with the function of surrounding equipment as well as the inverter’s own control wiring. Fig. 8.2
shows an example of filters and shielding schemes to help minimize any radiated EMI.
N3 IM
MCCB
Power
Source
Noise
Filter
Grounded
Metal Conduit
Noise
Filter
Grounded Metal
Enclosure
Signal Cable
11.8 in. / 30 cm
(Separate signal wiring from power leads
by a minimum of 30 cm / 11.8 in..)
Fig. 8.2 Input / Output Power Wiring Noise Suppression
Cont.

N3 Drive Operations Manual
Inverter Wiring; Input Power Wiring 12
8.3 Motor Cable Length
The length of the cables between the motor and inverter can cause a significant phase to phase voltage
reduction at the motor due to the voltage drop across the cables. To calculate this reduction, apply the following
formula:
Phase-to-phase voltage drop (V) = 3 ×resistance of wire (Ω/km) × length of line m) × current×10-3.
(km=3280 x feet) (m=3.28 x feet )
8.4 Cable Length vs Carrier Frequency
The allowable setting of the PWM carrier frequency is also determined by motor cable length and on is specified
in the following table.
Table 8.2 Cable Length vs Carrier Frequency
Cable length between the
inverter and motor
ft / m
< 75 / 22.9
< 150/45.7
< 300 / 91.4
> 300 / 91.4
Recommended carrier
frequency allowed
<=16KHz
<=12KHz
<=8KHz
<= 5KHz
Setting of parameter
A044
<=16
<=12
<=8
<=5
8.5 Inverter Grounding
The proper grounding scheme for one or more inverters is very important to ensure personnel safety as well as
equipment performance. The following will discuss the proper grounding procedures.
The grounding resistance for the 230V class; <100, the 460V class; <10.
The ground wire size (AWG) is per electrical code.
Do Not share a ground with any other equipment with high current loads such as welding machines, presses,
etc. Connect the inverter to its own dedicated ground.
Do Not make a loop when several inverters share a common ground point (See Fig. 8.5c).
N3 N3 N3
N3 N3 N3
a) Correct
b) Correct
N3 N3 N3
c) Incorrect
Loop
Fig. 8.5 Inverter Grounding

N3 Drive Operations Manual
Inverter Wiring; Input Power Wiring 13
8.6 Input Power Wiring and Installation Recommendations with Examples
Fig. 8.6 shows input power installation recommendations with correct and incorrect examples.
When possible the inverter should be connected to a dedicated input power source. (Fig. 8.6 a)
When the inverter is sharing a power source with other equipment, either install a special input noise filter,
(Fig. 8.6b) or an isolation transformer, (Fig. 8.6c) to isolate other loads.
Using a general purpose noise filter may not give sufficient results as shown in (Fig. 8.6d) below.
N3 IM
MCCB
Power
Source
N3 IM
MCCB
Power
Source General
Noise
Filter
Machine
N3 IM
MCCB
Power
Source
Machine
General
Noise
Filter
N3 IM
MCCB
Power
Source Special
Noise
Filter
Machine
N3
MCCB
Power
Source
Machine
IM
Isolation
Transformer
a) Dedicated Power Source
b) Special Noise Filter
c) Isolation Transformer
d) General Noise Filter
CORRECT INCORRECT
or
Fig. 8.6 Input Power Wiring and Installation Examples

N3 Drive Operations Manual
Input / Output Power Section Block Diagram 14
9.0 Input / Output Power Section Block Diagram
The following Fig. 9.0 A), B) and C) show the basic configuration of the power sections for the range of horsepower
and input voltages. This is shown for reference only and is not a detailed depiction.
Control
Circuit
Cooling Fan
+
_
L1(L)
L2
L3 (N)
T1
T2
T3
DC /DC
Converter
PE
Control
Circuit
Cooling Fan
C.M. Choke
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
DC /DC
Converter
E
Control
Circuit
Cooling Fan
C.M. Choke
DC /DC
Converter
+24VDC
+
_
E
+
_
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
B) 230V: 25 HP and 440v : 25 –30 HP
C) 230V: 30 - 40 HP and 440v : 40 –75 HP
A) 230V 1Ø: 0.5 –3 HP, 230V 3Ø: 0.5 –10 HP and 460V 3Ø: 1 - 15 HP
Fig. 9.0 Power Input / Output Block Diagrams

N3 Drive Operations Manual
Control Terminals (TM2); Terminal Layout & Wiring 15
10.0 Control Terminals (Terminal Block TM2)
The following table shows the control terminal designations for terminal block TM2. Refer to the parameter section of
this manual and to General Wiring Diagrams 5.0 and 6.0 for further explanation of the functions and connections.
Table 10.1 Control Terminal Designations (Terminal Block TM2)
Terminal
Description
R2A
Multifunctional output relay (Form A - N.O.)
Contact rating:
(250VAC or 30VDC @ 1A)
Contact function:
(refer to parameters A105 & A106)
R2B
R1C
Common contact
Multifunctional output relay
(Form C)
R1B
Normal close contact
R1A
Normal open contact
10V
Frequency knob (VR) power source terminal. 10 mA max. (Do not use for other functions)
AIN / S7
Analog signal input terminal (0 -10Vdc / 4 - 20mA), or multifunction input terminals S7
(H level:>8V, L level:<2V, PNP only) (refer to parameter A056 description)
AI2
Analog signal input (0 - 10V / 0 –20 mA) 0r 2 –10V / 4 –20 mA) 3 -75 HP: (For Ver. 1.3
or later only)
24V
Common for digital inputs, S1-S5 (S6, S7) in PNP (Source) input. (SW1 is set to PNP input)
50 mA max. (Do not use for other functions)
COM
0.5 - 2 HP & (3 –75HP prior to Ver. 1.3): Common for analog input /output signals and for
digital S1 - S5 inputs in NPN (Sink) input. (SW1 set to NPN input)
*24G
Common for digital S1 –S6 inputs in NPN (Sink) input. ( SW1set to NPN input)
*AGND
Common for analog inputs AIN & AI2 and analog output FM+
FM+
Multifunction analog output signal, 0-10VDC @ 2mA max. (refer to parameter A103
description)
S1
Multifunction digital input terminals(refer to parameters A050 - A054 description)
S2
S3
S4
S5
Multifunction digital input terminal (Same as S1 –S4) or can be used as a pulse train input
to control output frequency. (refer to parameter A054=0019 description). Input pulse level
19.2V min. to 24.7V max.
S6 / AI2
0.5 - 2 HP& (3 –75HP prior to Ver. 1.3): Multifunction input terminal (digital terminal high
level:>8V, Low level:<2V, PNP only) or analog input terminal AI2 (0 -10Vdc / 4 - 20mA).
( refer to A055 description)
* 3 -75 HP: (For Ver. 1.3 or later only, see Appendix G for further details)
Cont.

N3 Drive Operations Manual
Control Terminals (TM2); Terminal Layout & Wiring Cont. 16
10.2 Control Terminal Layout (Terminal Block TM2) and Control Switches
R2B R2A S6 S5 S4 S3 S2 S1
R1AR1B R1C AIN
10V 24V FM+
COM
0.5 –10 HP (230V) 1 –15 HP (460V)
SW2
R2B R2A S6 S5 S4 S3 S2 S1
R1AR1B R1C AIN
10V 24V FM+
COM
COM COM
15 –40 HP (230V) 20 –75 HP (460V)
R2B R2A S6 S5 S4 S3 S2 S1
R1AR1B R1C AIN
10V 24V FM+
COM
0.5 –2 HP (230V) 1 –2 HP (460V)
Fig. 10.2.2 Control Terminal TM2 Layout (Prior to Version 1.3)
Fig. 10.2.1 Control Terminal TM2 Layout
R2B R2A S6 S5 S4 S3 S2 S1
R1AR1B R1C AIN 10V AGND
24V FM+
AI2
24G
SW1 - Sets the input digital terminals S1-S7 for Sink (NPN) or Source (PNP) logic.
SW2 - Sets the analog input terminal AIN for voltage (V) or current (I).
SW3 –Sets the analog input terminal AI2 (Ver. 1.3 or later) or the multifunctional terminal S6/AI2 (prior to Ver.1.3) for voltage (V) or current (I).
Please refer to General Wiring Diagrams 5.0 and 6.0 for further information.
SW1
NPN
PNP
SW3
I
V
SW2
Control Switches
Control Board
3 –40 HP (230V) 3 –75 HP (460V)
R2B R2A S6 S5 S4 S3 S2 S1
R1AR1B R1C AI2 10V AIN
24V FM+
AGND
24G
Version 1.4 and above
Version 1.3
10.3 Control Terminal Wiring and Connections (Terminal TM2)
Control wiring is connected to terminal TM2. Select the proper wire and rating in accordance with the following:
Use copper wire only. The proper wire diameter should be based on ratings at +105°C.
AWG #18 is recommended.
To minimize EMI (electromagnetic interference), route control cables at least 12 in. from any power cables.
Do not run control wiring in the same conduit with power and motor wiring.
Depending on signal levels, shielded - twisted pair wiring is recommended as shown in the Fig. below.
For nominal values of input / output signals, follow the requirements of class 2 wiring
Shield
Twisted Pair
Wrap with insulating Tape
Ground Shield at Inverter
end ONLY
DO NOT Ground Shield at
this end
Control Cable, Shielded Twisted Pair

N3 Drive Operations Manual
Peripheral Power Devices 17
11.0 Peripheral Power Devices
The following describes some of the precautions that should be followed when selecting peripheral power devices.
~
~
~
Power Supply
MCCB
Molded
Circuit
Breaker
Magnetic
Contactor
AC
Reactor
Fast
Acting
Fuse
Input Noise
Filter
N3
Inverter
Ground
Induction
Motor
Ground
Output Noise
Filter
Power supply:

!
Make sure the correct voltage is applied to avoid damaging the
inverter.
Molded-case circuit breaker (MCCB) or fused disconnect:
A molded-case circuit breaker or fused disconnect must be installed
between the AC source and the inverter that conforms to the rated
voltage and current of the inverter to control the power and protect the
inverter.

!
Do not use the circuit breaker as the run/stop switch for the
inverter.
Ground fault detector / breaker:

!
Install a ground fault breaker to prevent problems caused by
current leakage and to protect personnel. Select current range up to
200mA, and action time up to 0.1 second to prevent high frequency
failure.
Magnetic contactor:
Normal operations do not need a magnetic contactor. When
performing functions such as external control and auto restart after
power failure, or when using a brake controller, install a magnetic
contactor.

!
Do not use the magnetic contactor as the run/stop switch for
the inverter.
AC line reactor for power quality:
When inverters are supplied by a high capacity (above 600KVA)
power source, an AC reactor can be connected to improve the power
factor.
Install Fast Acting Fuse:
To protect peripheral equipment, install fast acting fuses in
accordance with the specifications in Sec.12.0.
Input and output noise filter:
A filter must be installed when there are inductive loads affecting the
inverter.
Inverter:
Output terminals T1, T2, and T3 are connected to U, V, and W
terminals of the motor. If the motor runs in reverse while the inverter
is set to run forward, swap any two terminals connections for T1, T2,
and T3.

!
To avoid damaging the inverter, do not connect the output
terminals T1, T2, and T3 to AC input power.

!
Connect the ground terminal properly. (230V series: Rg <100;
460V series: Rg <10.)