motortronics articles

Soft Starters for Pumping Applications

Motortronics

Soft Starters for Pumping ApplicationsCommercial and Residential Irrigation
Sludge Pumps
Submersible Deep Wells
Booster Pumps
Metering Pumps
Storage Tanks
Standalone Soft Starters or Packaged to Customer Specification

Eliminate the damaging effects of "Water Hammer"

A gradual reduction in the output torque of your pump motor is provided when a stop signal is initiated. When the motor output reaches a point where the check valve can be safely and gently closed, the Pump-FlexTM circuit automatically turns itself off.

Since no two pumps or pump applications are exactly the same, the exible settings of Pump-FlexTM decel control allow you to tailor the output to precisely match your application requirements. No need for external timers or auxiliary controls.

Line Voltage - 200-600200-600VAC 3 phase 50/60HZ
Current Rating - 18-1250A (5HP to 1200HP)
AC Supply Voltage - 120V Control Voltage (CPT included)

Rugged Power Components:
-Inverse parallel paired SCRs
-Auto-synchronizing gate firing method
-500% 60-sec overload capacity
-1600V PIV rating

Ramp Control:
-Closed Loop Torque/Current Ramping
-Voltage Ramp with Current Limit

Across the Line Start Capability:
-Fully Rated Bypass/Emergency Start Contactor
-Full voltage/Softstart Selector Switch
-Independent Overload Relay

Advanced Motor Protection:
-Retentive Thermal Memory
-DDynamic Reset Capacity

Built-In Functions:
-Process Control Timer, Operator Interface
-Ramp Control Choices (4 built-in), Dual Ramps, Jog Function
-Kick Start Function, Pump-Flex Deceleration Ramp, Restart Delay Timer
-Time Clock Controller, RS-485 Serial Communications