8 SUNFAR E300 SERIES
3.2 Wiring of External Components
Power
Please follow this manual for appointed input power specification.
Air-breaker switch
1. When inverter is in maintenance or long-time nonuse, air-breaker switch isolates inverter and
power supply.
2. When inverter input side has failure of short circuit or power low-volt, air-breaker switch can
take protection.
Contactor
Control power-on and power-off of inverter and load motor.
AC reactor
1. Increase power factor；
2. Reduce power network harmonic wave input from inverter；
3. Weaken imbalance effect on three phase power volt.
Breaking resistor
In the situation of regenerative braking, avoiding bringing volt too high. Recommended
specification for the devices as following:
Model
Applied motor
(KW)
Wire spec（main circuit）
(mm
2
)
Air-breaker
(A)
Magnetic contactor
(A)
E300-2S0002(B) 0.25 1.5 10 6
E300-2S0004(B) 0.4 1.5 16 6
E300-2S0007(B) 0.75 2.5 20 12
E300-2S0015(B) 1.5 2.5 32 18
E300-2S0022(B)
2.2 6 32 18
E300-4T0007(B) 0.75 1.0 10 6
E300-4T0015(B) 1.5 1.5 16 12
E300-4T0022(B)
2.2 4 16 12
E300-4T0037(B)
3.7 4 20 18
Fig 3-2 Inverter wiring
Motor
R/L1
S/L2
T
U
V
W
AC re a c to r
E300
AC power
PP PB
Air-breaker switch
Contactor
Braking resistor
! WARNING
1.Refe r to th e instr uct io n ma nua l be fore installa ti on
and oper a tion .
2.Do no t conn ect A C pow er to ou tput termin als UVW .
3.Do not remove any cover while applying power
and at least 10 min. a fter disc onn ecting pow er .
4.Securely ground(earth) the equipment.
E300 Series Mini-type Integrated Universal Inverter Manual
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