Enhancements include use of an improved sensorless vector (SLV) control algorithm that allows the L700 to develop 150% torque at 0.5Hz, suiting it well for applications beyond just fans and pumps. Another notable upgrade is the EzSQ (Easy Sequence) built-in programming function, which provides the functionality of a PLC built into the L700 inverter. In many cases, the need for a separate PLC can be eliminated due to this internal capability, says the vendor. Other new L700 features include patented micro-surge voltage suppression to protect the motor winding insulation, advanced trip avoidance functions, configurable sink/source logic on digital inputs, built-in dynamic braking circuit in models up to 30hp (22kW) and a built-in EMC filter in models up to 200hp (160kW).
Hitachi America Ltd.
Industrial Components and Equipment Division
www.hitachi-america.us/inverters
800.448.2244
