Hitachi SJ700B high performance frequency inverters series for pump applications

Hitachi vfd SJ700B series has a high starting Torque

Improved Sensorless Vector Control and Auto Tuning produce high starting torque of 200% or more at 0.3Hz.*1 Easy setup of motor constants Ideal for applications which need high torque, such as cranes, extruders and lifts.

Hitachi drive SJ700B series exclusive 0Hz Domain sensorless vector control

Develops 150%(SJ700B:120%) * 2 torque at 0Hz speed reference Ideal for cranes and other applications that require high torque at starting.
*2 when inverter is one frame size larger than motor.

Position Control Function

The SJ700, with optional feedback board installed, together with an encoder-equipped motor can perform position control. For many applications, suitable performance can be achieved at a lower cost than servo systems. Based on your four motion parameters (position command, speed command, acceleration time and deceleration time), the SJ700 will move an object from original position A to target position B. After the movement, the inverter keeps servo lock status.

Hitachi drive SJ700B series over current & voltage suppress function 

Higher internal calculation speed improves current control performance. Over-current suppress and Over-voltage suppress functions avoid inverter trip during acceleration and deceleration. 

DC Bus AVR Function During Deceleration

The SJ700 controls deceleration time so that the DC bus voltage does not exceed the over-voltage trip level, providing trip-less operation during deceleration.

Hitachi drive SJ700B series Inverter control by Built-in Programming function

Sequence operation is realized by downloading to an inverter a program created with Hitachi's EzSQ software. Tailor inverter operation to meet changing process requirements, and replace separate PLCs in some cases. By simplifying or eliminating external hardware, signficant cost savings can be achieved. Password function is incorporated to provide security for proprietary program data against loss or unauthorized modification.

Hitachi inverter SJ700B series has a EMC Filter & Brake circuit integrated as Standard

- Built-in EMC Filter up to 150kW
- Brake circuit up to 22kW

Easy-removable construction for maintenance

Field replacement of cooling fan(s) and DC bus capacitors can be accomplished in a fraction of the time. Using Logic terminal move to SJ700 without wiring change. Read SJ300 Parameter by SRW remote operator and write them in to SJ700.

Hitachi frequency inverter SJ700B series long life time components & Life time warning function

Design lifetime 10 Years or more for Dc bus capacitors & Cooling Fan. Cooling Fan ON/OFF control function for longer fan life.
*Ambient temperature: Average 40 deg C (SJ700B: 30 deg C) (no corrosive gases, oil mist or dust) Design lifetime is calculated, and not guaranteed.

Life time warning function

Perform preventive maintenance before a failure occurs using the Lifetime Warning function. DC bus capacitor, cooling fan, heat sink temperature and motor temperature can be monitored in order to replace components prior to failure.

User selection of Displayed Parameters

- Data comparison function
Allows display of only parameters changed from default.
- User selected function
Display of up to 12 User Defined Parameters U001 to U012.
- Basic mode (default)
Basic display mode for commonly used parameters.

- Other Functions
 The direct input of function code selection is possible rather than scrolling through the list.
Holding down the function key for 3 seconds, causes the display to jump to output frequency monitor (d001) mode from any menu location.

Hitachi vfd SJ700B series Micro Surge Voltage suppress function