What is the difference between a PCS and PCE softstarters? Will PCS work in an elevator application?
The PCS and PCE (or PCEC) softstarters look similar, but have one major difference in the function of the 97/98 terminals.
Often customers look at Sprecher + Schuh products to replace an existing competitor product. The technical specifications of PCS softstarters may match many features of older softstarters or competitor elevator starters. However, for wye-delta applications the PCE softstarter is the best choice. On the surface it may appear that PCS and PCE softstarters are the same device but there are important differences. One major difference is that PCE uses an external fault contactor and this is quite different from an external by-pass contactor. Hydraulic elevator codes require an external fault contactor in line with the soft starter. A fault contactor ensures all three motor winding legs are opened during a fault condition to shut down the motor.
Control power is applied to the PCE terminals A1-A2 constantly. When the start enable signal is sent to terminals 1N1 and 1N2 the soft starter will ramp up the motor to full voltage and the LED run light will remain ON. When control power is first applied to A1-A2 of the PCE the terminals 97-98 close and in turn closes the fault contactor which remains closed until there is a fault encountered. When a fault occurs, the contact between 97-98 opens and the fault contactor opens. The PCE reports the fault by blinking the LED. Please note that the fault contactor is supplied with the PCEC model and PCE is the controller by itself. See the PCEC product page for more information.