11.1 Inverter
11.1.1 Inverter specifications
Applicable models
RAS-8FSXN to RAS-18FSXN
Applicable power source
3 phase, 400 V ± 10%, 50 Hz
Maximum output voltage
380 - 415 V
Maximum output current
25 A
Control method
Vector control PWM (Pulse width modulator)
Output frequency range
10 to 115 Hz
Frequency accuracy
0.01 Hz
Output / characteristics
Conditions:
1. Power source voltage 400 V AC.
2. Without a load (Free output).
(V)
400
380
300
200
100
0
50
10
75
100
115
f (Hz)
N O T E
The characteristics are fluctuated due to the current minimize control.
Soft start and stop
0.125 Hz/s, 0.25 Hz/s, 0.5 Hz/s, 1 Hz/s, 3 Hz/s (5 steps)
Protection function:
Excessively high or low inverter voltage
Excessively low voltage in case the DC voltage is lower than 350 V.
Excessively high voltage in case the DC voltage is higher than 750 V.
Malfunction in the current sensor
Compressor current stoppage lower than 1.5 A
Cause of the malfunction:
•
Sensor current failure.
•
Transistor module failure.
•
Compressor failure.
•
Disconnected wiring.
11 Electrical checks of the
main parts
330
SMGB0065 rev. 1 - 12/2010
