Main Circuit Terminal Specifications; Specification Of Main Circuit Terminal; Terminal Arrangement Of The Main Circuit Terminal, Power Supply And The Motor Wiring - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Main circuit terminal specifications

2.2 Main circuit terminal specifications

2.2.1

Specification of main circuit terminal

Terminal
Terminal Name
Symbol
R/L1,
S/L2, AC power input
T/L3
U, V, W Inverter output
R1/L11, Power supply for
S1/L21 control circuit
Brake resistor
P/+, PR connection
(22K or lower)
Brake unit
P/+, N/-
connection
DC reactor
P/+, P1
connection
Built-in brake circuit
PR, PX
connection
Earth (Ground)
CAUTION
· When connecting a dedicated brake resistor (FR-ABR) and brake unit (FR-BU2, FR-BU, BU) remove jumpers across terminals
PR-PX (7.5K or lower). For details, refer to page 40.
2.2.2 Terminal arrangement of the main circuit terminal, power supply and the motor
wiring.
FR-A720-0.4K, 0.75K
R/L1 S/L2 T/L3
Jumper
R1/L11 S1/L21 N/-
Power supply
16
Connect to the commercial power supply.
Keep these terminals open when using the high power factor converter (FR-
HC and MT-HC) or power regeneration common converter (FR-CV).
Connect a three-phase squirrel-cage motor.
Connected to the AC power supply terminals R/L1 and S/L2. To retain the
fault display and fault output or when using the high power factor converter
(FR-HC and MT-HC) or power regeneration common converter (FR-CV),
remove the jumpers from terminals R/L1-R1/L11 and S/L2-S1/L21 and apply
external power to these terminals.
The power capacity necessary when separate power is supplied from R1/
L11 and S1/L21 differs according to the inverter capacity.
200V class
400V class
Remove the jumper from terminals PR-PX (7.5K or lower) and connect an
optional brake resistor (FR-ABR) across terminals P/+-PR.
For the 22K or lower, connecting the resistor further provides regenerative
braking power.
Connect the brake unit (FR-BU2, FR-BU, BU and MT-BU5), power
regeneration common converter (FR-CV), power regeneration converter
(MT-RC), high power factor converter (FR-HC and MT-HC) or DC power
supply (under the DC feeding mode).
For the 55K or lower, remove the jumper across terminals P/+ - P1 and
connect the DC reactor. (As a DC reactor is supplied with the 75K or higher
as standard, be sure to connect the DC reactor.)
Keep the jumper across P/+ and P1 attached when a DC reactor is not
connected.
When the jumper is connected across terminals PX-PR (initial status), the
built-in brake circuit is valid. (Provided for the 7.5K or lower.)
For earthing (grounding) the inverter chassis. Must be earthed (grounded).
Jumper
PR
P/+ PX
IM
Motor
Charge lamp
Description
11K or lower 15K
60VA 80VA
60VA 60VA
FR-A720-1.5K to 3.7K
FR-A740-0.4K to 3.7K
R/L1 S/L2 T/L3
Jumper
R1/L11 S1/L21
Power
supply
18.5K or higher
80VA
80VA
Jumper
PR
N/- P/+
PX
Charge lamp
IM
Motor
Refer
to
page
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23
40
42
49
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21