Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 63 / 1218

Installation and wiring Main circuit terminals
FR-A800 2 - 33
2.5 Main circuit terminals
2.5.1 Details on the main circuit terminals
Terminal
symbol
Terminal name Terminal function description
Refer to
page
R/L1,
S/L2,
T/L3
AC power input
Connect these terminals to the commercial power supply.
Do not connect anything to these terminals when using the
high power factor converter (FR-HC2) or the power regeneration
common converter (FR-CV).
—
U, V, W Inverter output
Connect these terminals to a three-phase squirrel cage motor or
a PM motor.
—
R1/L11,
S1/L21 Power supply for the control
circuit
Connected to the AC power supply terminals R/L1 and S/L2. To
retain the fault display and fault output, or to use a high power
factor converter (FR-HC2) or a power regeneration common
converter (FR-CV), remove the jumpers across terminals R/L1 and
R1/L11 and across S/L2 and S1/L21, and supply 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.
FR-A820-00630(11K) or lower, FR-A840-00380(15K) or lower:
60 VA
FR-A820-00770(15K) or higher, FR-A840-00470(18.5K) or higher:
80 VA
2-57
P/+, PR
Brake resistor connection
FR-A820-00630(11K) or lower
FR-A840-00380(15K) or lower
Connect an optional brake resistor (FR-ABR) across the terminals
P/+ and PR. Remove the jumper across the terminals PR and PX
for the inverter capacity that has the terminal PX.
Connecting a brake resistor increases the regenerative braking
capability.
2-87
P3, PR
Brake resistor connection
FR-A820-00770(15K) to
01250(22K)
FR-A840-00470(18.5K) to
01800(55K)
Connect an optional brake resistor across the terminals P3 and
PR.
Connecting a brake resistor increases the regenerative braking
capability.
P/+, N/-
Brake unit connection
FR-A820-00630(11K) or lower
FR-A840-00380(15K) or lower Connect the brake unit (FR-BU2, FR-BU, BU), power regeneration
common converter (FR-CV), power regeneration converter
(MT-RC), high power factor converter (FR-HC2), or DC power
supply (under DC feeding mode).
When connecting multiple inverters, FR-A820-00770(15K) to
01250(22K) or FR-A840-00470(18.5K) to 01800(55K), in parallel
using the FR-CV, or FR-HC2, always use either of the terminal P/+
or P3 for the connection. (Do not use the terminals P/+ and P3
together.)
Do not connect the DC power supply between terminals P3 and
N/–. Use terminals P/+ and N/- for DC feeding.
2-92
P3, N/-
Brake unit connection
FR-A820-00770(15K) to
01250(22K)
FR-A840-00470(18.5K) to
01800(55K)
P/+, P1
DC reactor connection
FR-A820-03160(55K) or lower
FR-A840-01800(55K) or lower
Remove the jumper across terminals P/+ and P1, and connect a
DC reactor.
When a DC reactor is not connected, the jumper across
terminals P/+ and P1 should not be removed.
When using a motor with 75 kW or higher, always connect a DC
reactor, which is available as an option.
2-101
DC reactor connection
FR-A820-03800(75K) or higher
FR-A840-02160(75K) or higher
Always connect a DC reactor, which is available as an option.
PR, PX Built-in brake circuit connection
When the jumper is connected across terminals PX and PR
(initial status), the built-in brake circuit is valid.
The built-in brake circuit is equipped in the FR-A820-
00490(7.5K) or lower and FR-A840-00250(7.5K) or lower.
—
Earth (ground)
For earthing (grounding) the inverter chassis. This must be
earthed (grounded).
2-42
Tab. 2-7: Specification of main circuit terminal
NOTE When connecting an optional brake resistor (FR-ABR) or a brake unit (FR-BU2, FR-BU, BU), remove
the jumpers across the terminals PR and PX. For the details, refer to page 2-87.