Caution: Be sure to read the SJ300 Inverter Manual and follow
its Cautions and Warnings for the initial product installation.
This Quick Reference Guide is intended for reference use by
experienced users in servicing existing installations.
UL® Cautions, Warnings, and Instructions
Wiring Warnings for Electrical Practices and Wire Sizes
The Cautions, Warnings, and instructions in this section summarize the
procedures necessary to ensure an inverter installation complies with
Underwriters Laboratories
Wa rn in g: “Use 60/75°C Cu wire only” or equivalent.
Wa rn in g: “Open Type Equipment.” For models SJ300–750H to
SJ300–1500H.
Wa rn in g: “Suitable for use on a circuit capable of delivering
not more than 100,000 rms symmetrical amperes, 240 V
maximum.” For models with suffix L.
Wa rn in g: “Suitable for use on a circuit capable of delivering
not more than 100,000 rms symmetrical amperes, 480 V
maximum.” For models with suffix H.
Terminal Tightening Torque and Wire Size
The wire size range and tightening torque for field wiring terminals are
presented in the tables below.
Motor output
kWHPft-lbs (N-m)
0.41/2–004LFU201.11.5
0.751–007LFU181.11.5
1.52–015LFU141.11.5
2.23–022LFU141.11.5
3.75–037LFU101.11.5
5.57 1/2–055LFU81.82.5
7.510–075LFU61.82.5
1115–110LFU43.64.9
1520–150LFU23.64.9
®
guidelines.
200V Models
Inverter
Model
Wire Size (AWG)
Torque
1
200V Models
Motor output
kWHPft-lbs (N-m)
18.525–185LFU13.64.9
2230–220LFU1/0 AWG6.58.8
3040–300LFU1/0 || 1/0 AWG6.58.8
3750–370LFU1/0 || 1/0 AWG6.58.8
4560–450LFU1/0 || 1/0 AWG10.113.7
5575–550LFU2/0 || 2/0 AWG10.113.7
Inverter
Model
400V Models
Wire Size (AWG)
Torque
Motor output
kWHPft-lbs (N-m)
0.751–007HFU/E201.11.5
1.52–015HFU/E181.11.5
2.23–022HFU/E161.11.5
4.05–037HFU/E141.11.5
5.57 1/2–055HFU/E121.82.5
7.510–075HFU/E101.82.5
1115–110HFU/E83.64.9
1520–150HFU/E63.64.9
18.525–185HFU/E63.64.9
2230–220HFU/E43.64.9
3040–300HFU/E33.64.9
3750–370HFU/E13.64.9
4560–450HFU/E1AWG (75°C)6.58.8
5575–550HFU/E1/0 || 1/0 AWG6.58.8
75100–750HFU/E
90125–900HFU/E10.113.7
110150–1100HFU/E1/0 || 1/0 AWG10.113.7
Inverter
Model
Wire Size (AWG)
3/0 (1/0 || 1/0
AWG )
Torque
6.58.8
2
400V Models
Motor output
kWHPft-lbs (N-m)
132175–1320HFU/E3/0 || 3/010.113.7
150200–1500HFU/E3/0 || 3/010.113.7
Inverter
Model
Wire Size (AWG)
Torque
Wire Connectors
Wa rn in g: Field wiring connections
must be made by a UL Listed and CSA
Certified ring lug terminal connector
sized for the wire gauge being used.
The connector must be fixed using the
crimping tool specified by the connector manufacturer.
Terminal (ring lug)
Cable support
Cable
Fuse and Circuit Breaker Sizes
The inverter’s input power wiring must include UL Listed, dual-element,
600V fuses, or UL Listed, inverse-time, 600V circuit breakers.
200V Models
Motor output
kWHP
0.41/2–004LFU10
0.751–007LFU10
1.52–015LFU10
2.23–022LFU15
3.75–037LFU20
5.57 1/2–055LFU30
7.510–075LFU40
1115–110LFU60
1520–150LFU80
18.525–185LFU100
2230–220LFU125
Inverter
Model
Ampere Rating for
Fuse or Breaker
3
200V Models
Motor output
kWHP
3040–300LFU150
3750–370LFU175
4560–450LFU225
5575–550LFU250
Motor output
kWHP
0.751–007HFU/E10
1.52–015HFU/E10
2.23–022HFU/E10
4.05–037HFU/E15
5.57 1/2–055HFU/E15
7.510–075HFU/E20
1115–110HFU/E30
1520–150HFU/E40
18.525–185HFU/E50
2230–220HFU/E60
3040–300HFU/E70
3750–370HFU/E90
4560–450HFU/E125
5575–550HFU/E125
75100–750HFU/E175
90125–900HFU/E200
110150–1100HFU/E250
132175–1320HFU/E300
150200–1500HFU/E300
Inverter
Model
400V Models
Inverter
Model
Ampere Rating for
Fuse or Breaker
Ampere Rating for
Fuse or Breaker
4
Motor Overload Protection
Hitachi SJ300 inverters provide solid state motor overload protection,
which depends on the proper setting of the following parameters:
Set the rated current [Amperes] of the motor(s) with the above parameters. The setting range is 0.2 * rated current to 1.2 * rated current.
Wa rn in g: When two or more motors are connected to the
inverter, they cannot be protected by the electronic overload protection. Install an external thermal relay on each motor.
5
Power Circuit Terminals
Inverter models:
–004LFU,
–007 to –055LFU,
–007 to –055HFE, HFU
The following wiring diagram shows the power and motor connections
for basic operation. The optional signal input wiring supports external
Fwd and Rev Run command, and a speed potentiometer.
SJ300
From 3-phase
power input
source (See
specifications
label on inverter
for details)
–FU/–FR
–FE
default
Analog reference
External
speed
reference
pot.
default
Common
Inputs:
Forward
Reverse
Analog common
R
(L1)
S
(L2)
T
(L3)
P24
PLC
CM1
FW
8
H
O
L
U
(T1)
V
(T2)
W
(T3)
AL1
Alarm contacts,
ALO
AL2
Open collector
outputs:
Run signal
12
Frequency
11
arrival signal
Logic output
CM2
Motor
1 Form C
Load
Load
common
9
Inverter Keypad Operation
POWER
ALARM
HZ
V
kW
A
%
MINMAX
STR
Parameter Display
Powe r L ED
Alarm LED
Display Units LEDs
Hertz
Volts or Amperes
(kW = both ON)
Percent
Potentiometer
Enable LED
Potentiometer
Run/Stop LED
Program/Monitor LED
HITACHI
RUN
PRG
RUN
FUNC.
Function KeyUp/Down KeysStore Key
Run Key
Run Key Enable LED
5 0.0
STOP
RESET
1
Stop/Reset Key
2
• Run/Stop LED – ON when the inverter output is ON and the motor is
developing torque, and OFF when the inverter output is OFF (Stop
Mode).
• Program/Monitor LED – This LED is ON when the inverter is ready
for parameter editing (Program Mode). It is normally OFF when the
parameter display is monitoring data (Monitor Mode). However, the
PRG LED will be ON whenever you are monitoring the value of
parameter D001. (When the keypad is enabled as the frequency source
via A001=02, you can edit the inverter frequency directly from D001
monitor display by using the Up/Down keys.)
• Run Key Enable LED – ON when the inverter is ready to respond to
the Run key, OFF when the Run key is disabled.
• Run Key – Press this key to run the motor (the Run Enable LED must
be ON first). Parameter F004, Keypad Run Key Routing, determines
whether the Run key generates a Run FWD or Run REV command.
(continued, next page...)
10
• Stop/Reset Key – Press this key to stop the motor when it is running
(uses the programmed deceleration rate). This key will also reset an
alarm which has tripped.
• Potentiometer (OPE–SRE only) – Allows an operator to directly set
the motor speed when the potentiometer is enabled for output
frequency control.
• Potentiometer Enable LED – ON when the potentiometer is enabled
for value entry.
• Parameter Display – A 4-digit, 7-segment display for parameters and
function codes.
• Display Units: Hertz/Volts/Amperes/kW/% – These LEDs indicate
the units associated with the parameter display. When the display is
monitoring a parameter, the appropriate LED is ON. In the case of kW
units, both Volts and Amperes LEDs will be ON. An easy way to
remember this is that kW = (V x A)/1000.
• Power LED – ON when the power input to the inverter is ON.
• Alarm LED – ON when an alarm condition has tripped the inverter.
Clearing the alarm will turn this LED OFF again. See page 14 for
details on clearing alarms.
• Function Key – This key is used to navigate through the lists of
parameters and functions for setting and monitoring parameter values.
• Up/Down Keys – Use these keys alternately to move up or down the
lists of parameter and functions shown in the display, and to increment/
decrement values.
• Store Key – When the unit is in Program Mode and the operator has
edited a parameter value, press the Store key to write the new value to
the EEPROM. This parameter is then displayed at powerup by default.
If you want to change the powerup default, navigate to a new parameter
value and press the Store key.
11
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