Chapter 9 LIST OF PERIPHERAL EQUIPMENT AND OPTIONS
Name of peripheral
equipment
Function and application
Main peri
p
heral
eq
ui
pm
ent
Molded case
circuit breaker
(MCCB)
Residual-current-
operated protec-
tive device (RCD)
/Earth leakage
circuit breaker
(ELCB)*
* with overcurrent
protection
MCCBs are designed to protect the power circuits between the power control
board and inverter’s main terminals (L1/R, L2/S and L3/T for three-phase
power, L1/L and L2/N for single-phase power) from overload or short-circuit
which in turn prevents secondary disasters caused by the inverter malfunc-
tioning.
RCDs/ELCBs function in the same way as MCCBs. Use the MCCBs and
RCDs/ELCBs that satisfy the recommended rated current listed below.
Recommended rated current (A) of
MCCB and RCD/ELCB
Power
supply
voltage
Applicable
motor
rating
(HP)
Inverter type
w/ DC reactor
w/o DC reactor
7.5
FRN0025C2S-2U
30
50
10
FRN0033C2S-2U
40
75
15
FRN0047C2S-2U
50
100
Three-
phase
200 V
20
FRN0060C2S-2U
75
125
7.5
FRN0013C2S-4U
15
30
10
FRN0018C2S-4U
20
40
15
FRN0024C2S-4U
30
50
Three-
phase
400 V
20
FRN0030C2S-4U
40
60
When connecting the inverter to the power supply, add a recommended
molded case circuit breaker (MCCB) or a residual-current-operated protec-
tive device (RCD)/earth leakage circuit breaker (ELCB)* in the path of power
supply. Do not use the devices with the rated current out of the recom-
mended range.
*With overcurrent protection
Fire could occur.
Select the MCCB or RCD/ELCB with appropriate rated current and breaking
capacity according to the power supply capacity.
Chapter 10 APPLICATION OF DC REACTORS (DCRs)
Since the "Japanese Guideline for Suppressing Harmonics in Home and General-purpose Appli-
ances" issued by the Ministry of International Trade and Industry (Currently the Ministry of Economy,
Trade and Industry) was revised in January 2004, the general-purpose inverters have no longer
been subject to the guideline. Individual inverter manufacturers have voluntarily employed har-
monics suppression measures. It is recommended that DC reactors (DCRs) specified in Table 10.1
be connected to the FRENIC-Mini series of inverters.
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