Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual page 38

Note: 1. Remove the jumpers across the R-R1 and S-S1 〈L
connect the control circuit power supply across the R1-S1 〈L
terminals R, S, T 〈L
Incorrect connection will damage the inverter. Reverse polarity of terminals N (−), P (+) will
damage the inverter.
2. The voltage phases of terminals R, S, T 〈L
before connection.
3. Use Pr. 180 to Pr. 186 (input terminal function selection) to assign the terminals used with the
X10 and X11 signals.
4. When the FR-HC is connected, use sink logic (factory setting). For source logic, the FR-HC
cannot be connected. (For the EC version, select the sink logic.)
( 5 ) Connection of the FR-RC power return converter (option)
(For power coordination, always install the power factor improving reactor (FR-BAL).)
When connecting the FR-RC power return converter, connect the inverter terminals (P, N) and FR-RC power
return converter terminals as shown below so that their signals match with each other. After making sure that
the wiring is correct, set "0" in Pr. 30 "regenerative function selection".
NFB
Power supply
Note: 1. For models 11K or less, the jumper across terminals PR-PX must be removed.
2. How to connect the FR-BAL power factor improving AC reactor (option)
When using two or more inverters in the same system, small impedance between the inverters
will cause a regenerative current from the power return converter to leak into the other inverters,
resulting in overcurrent alarm of the other inverters. To prevent this, install a power factor
improving AC reactor on the power supply side for all the inverters.
( 6 ) Connection of the power factor improving DC reactor (option)
Connect the FR-BEL power factor improving DC
reactor between terminals P1-P 〈P1- +〉. In this
case, the jumper connected across terminals P1-P
〈P1 +〉 must be removed. Otherwise, the reactor
-
will not function.
Note: 1. The wiring distance should be within 5m.
2. The size of the cables used should be equal to or larger than that of the power supply cables
(R, S, T) 〈L 〉.
, L , L
1 2 3
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〉 must be open.
, L , L
1 2 3
, L , L
1 2
R S T
〈L 〉 〈L 〉 〈L 〉
1 2 3
FR-BAL
•<Connection method>
27
INSTALLATION AND WIRING
- -
R1 and L S1〉 terminals of the inverter, and
1 2
〉 terminals. The power input
-
L
11 21
〉 and terminals R4, S4, T4 must be matched
3
Inverter
N P
FR-RC power return converter
N/−
P/+
R/L1 S/L2 T/L3
P
P1
〈+〉
FR-BEL
Remove
the jumper.