Hitachi S1 Series User Manual

S1 series standard inverter
-163-
7.6.3 Overvoltage
Overvoltage fault
Whether the voltage of the power
supply is within the standard range?
Whether the ACC/DEC
time is too short?
Whether the loaded motor
is drived reversely?
Ensure the power supply
meets the requirement
Whether UVW on the output
side ofn the inverter is short to
ground?
Whether the wiring on the
output side of the inverter is
performed properly?
Rectify the short-circuit
fault and perform the
wiring properly
Prolong the ACC/DEC
time
Check the load and adjust
If it is an inverter fault,
contact our company
Whether the ACC/DEC time
can be prolonged?
Whether to use a
brake accessory?
Add brake accessories
Adjust the brake
accessories and
resistance
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
7.6.4 Undervoltage
Undervoltage fault
Whether the inverter is
powered off during
running?
Whether the voltage of the
power supply is within the
standard range?
Ensure the power supply
meet the requirement
Whether the air switch and
contactor are opened or
encounter exceptions?
Close the air switch and
contactor; and rectify the
exceptions
Adjust the input of the
grid
Identify the power-off
causes, and rectify the
exceptions
If it is an inverter fault,
contact our company
Whether a large-power device
is running on the grid that pulls
down the voltage of the grid?
Yes
No
Yes
No
Yes
No
Yes
No

Hitachi S1 Series Specifications

General

Output Frequency	0 - 400 Hz
Overload Capacity	150% for 60 seconds
Frequency	50/60 Hz
Control Method	Sensorless Vector Control
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overheat, Short Circuit
Communication	RS485, Modbus RTU
Output Voltage	3-Phase 200-240VAC, 3-Phase 380-480VAC (Matches Input Voltage)
Cooling Method	Fan Cooled