Hitachi X200 Series AC Drives- Contactor-style package (power in at top/motor out at bottom)
- Emergency stop function
- Improved trip avoidance
- Advanced logic and calculate functions
- Suitable for side-by-side mounting
- Patented micro-surge voltage suppression
- Non-stop operation after instantaneous power failure
- Built in RS-485 Modbus/RTU
- Ratings ¼ to 3 hp, 230 V, single or 3-phase; 5 to 10 hp, 230 V, 3-phase; ½ to 10 hp, 460 V, 3-phase
Hitachi SJ200 Series VFD Inverters
- New Intelligent Sensorless Vector Control - NO Autotuning Required!
- Up to 200% Starting Torque
- Most compact Hitachi inverter ever
- Advanced Logic and Calculate functions
- Removable terminal strips for easy wiring
- Dynamic Braking transistor built in
- Advanced trip avoidance functions
- Removable Keypad
- NEMA 4X Remote Keypad option
- MODBUS RTU RS-485 built in
- Ratings ¼ to 10hp, 230V, single and 3 phase, ½ to 10hp, 460V, 3 phase
Standard PID control may, depending on system demand, allow a pump to operate at undesirably low speeds for prolonged periods of time, which can cause mechanical issues with certain pump types. In general, it is a wasteful use of energy, since most pumps do not generate significant flow or head at low speeds. A means is needed to stop the pump when no pumping is actually taking place. The term “sleep mode” is used to describe such a means. The implementation requires no additional hardware beyond what is required for standard PID operation.
The simple set-up and wiring is described in an Application Note (AN080717-1) which is available to view or download in the Technical Support Library area of Hitachi America’s web site.
