(Note 1) When retaining the alarm signal (for anyfault) or the keypad for display after the main power
of inverter is disconnected, connect the terminals R1 and T1 to the power supply. The inverter can
still run if the power supply is not input to the terminals.
(Note 2) Remove the shorting chip between terminal P1 - P(+) before connecting if it’ s used to
connect DC reactor (DCR) (accessories). Inverter of 75KW or above must use DC reactor (DCR).
(Note 3) Built-in braking resistor is connected between terminals P (+) – DB in the inverter below a
capacity of 5.5kW. Make sure to remove the connection to the built-in braking resistor when connect-
ing external braking resistor (accessories).
(Note 4)The motor operations are set by a variety of transfer switches on the electric panel. For
details, see “Transfer of various switches in 2.6.6”.
（
1
）
The inverter’s ground terminal [ G]
It’ s the inverter’ sground terminal. Please make ground terminal properly grounded for safety and
noise prevention. It’ s obligatory construct the metal frame ground of electrical equipment in electrical
equipment technical standard to prevent electric shock or fire accidents.
Connect the ground terminal in one side of the power supply as follows.
1) 440V series use special ground according to the technical standards for electrical equipment.
2) Ground wiring should connect the coarse wire with large surface area as short as possible.
Table 2.7 Equipment Ground Specified in Electrical Equipment Technical Standards
（
2
）
Inverter output terminals U, V, W and motor ground terminal G.
1) Connect the terminals U, V, W of 3-phase motor in the phase sequence.
2) Connect the ground wire of the output wires (U, V, W) to the ground terminal ( G).
Note: When there is more than one combination of an inverter and motor, do not use a multiconductor
cable for the purpose of running the leads together.
NOTE • Keep the length of wiring below 10m.
• Do not remove the shorting chip with no use of DC reactor.
（
3
）
DC reactor connection terminals P1, P (+).
Connect DC reactor (DCR) used for improving power factor.
1) Remove shorting chip from the terminal P1 - P (+).
2) Connect terminals P1, P (+) of DC reactor (option).
Ｍｕｌｔｉｃｏｎｄｕｃｔｏｒ ｃａｂｌｅ
Supply voltage
3 phase 440V
Types of ground
Special ground way
Ground resistance
Below 10Ω
Inverter 1
Inverter 2
Motor 2
Motor 1
Motor 3
Inverter 3
C
C
C
２０
