Main Circuit Terminal Specifications; Specification Of Main Circuit Terminal - 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
Brake unit
P/+, N/- connection
(22K or less)
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-BU, BU) remove jumpers across terminals PR-PX
(7.5K or less). For details, refer to page 44 to 47.
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
alarm display and alarm 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.
Do not turn off the power supply for control circuit (R1/L11, S1/L21) with the
main circuit power (R/L1, S/L2, T/L3) on. Doing so may damage the
inverter. The circuit should be configured so that the main circuit power (R/
L1, S/L2, T/L3) is also turned off when the power supply for control circuit
(R1/L11, S1/L21) is off.
15Kor less : 60VA, 18.5K or more : 80VA
Remove the jumper from terminals PR-PX (7.5K or less) and connect an
optional brake resistor (FR-ABR) across terminals P/+-PR.
For the 22K or less, connecting the resistor further provides regenerative
braking power.
Connect the brake unit (FR-BU, BU and MT-BU5), power regeneration
common converter (FR-CV), high power factor converter (FR-HC and
MT-HC) or power regeneration converter (MT-RC).
For the 55K or less, remove the jumper across terminals P/+ - P1 and
connect the DC reactor. (As a DC reactor is supplied with the 75K or
more as standard, be sure to connect the DC reactor. )
When the jumper is connected across terminals PX-PR (initial status),
the built-in brake circuit is valid. (Provided for the 7.5K or less.)
For earthing (grounding) the inverter chassis. Must be earthed
(grounded).
Description