14
Main circuit terminal specifications
2.2 Main circuit terminal specifications
2.2.1 Specification of main circuit terminal
* Connecting a DC reactor to the 01800
• When using the inverter for LD or SLD rating, always connect the supplied DC reactor.
• To improve power factor and suppress harmonics with a reactor when using the inverter for ND or HD rating, connect the supplied DC reactor.
• It is not necessary to connect the supplied DC reactor for operation other than the above. When not connecting the supplied DC reactor, connect
a supplied jumper across terminals P/+ and P1.
• The inverter operates only when either a DC reactor or jumper is connected.
Terminal
Symbol
Terminal Name Description
R/L1,
S/L2,
T/L3
AC power input
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).
U, V, W Inverter output Connect a three-phase squirrel-cage motor.
R1/L11,
S1/L21
Power supply for
control circuit
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.
00380 or less : 60VA, 00470 or more : 80VA
P/+, PR
Brake resistor
connection
(00620 or less)
Remove the jumper from terminals PR-PX (00250 or less) and connect an
optional brake resistor (FR-ABR) across terminals P/+-PR.
For the 00620 or less, connecting the resistor further provides regenerative
braking power.
P/+, N/-
Brake unit
connection
Connect the brake unit (FR-BU2, 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).
P/+, P1
DC reactor
connection
For the 01160 or less, remove the jumper across terminals P/+ - P1 and
connect the DC reactor. (As a DC reactor is supplied with the 01800 or
more as standard, be sure to connect the DC reactor.*)
PR, PX
Built-in brake circuit
connection
When the jumper is connected across terminals PX-PR (initial status),
the built-in brake circuit is valid. (Provided for the
00250
or less.)
Earth (Ground)
For earthing (grounding) the inverter chassis. Must be earthed
(grounded).
CAUTION
· When connecting a dedicated brake resistor (FR-ABR) and brake unit (FR-BU2, FR-BU, BU) remove jumpers across terminals
PR-PX (00250 or less). For details, refer to page 37 to 42.
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