Sensing Solutions

The CurrentWatch ECSTD Series from Eaton’s electrical business is a family of high performance current operated switches with field adjustable time delay to help minimize nuisance trips during start-up and operation. Designed for motor status applications where setpoint accuracy and repeatability are critical, the ECSTD Series offers a linear setpoint characteristic and constant hysteresis. Standard features include selfpowering, jumper-selectable ranges and a choice of outputs and housing styles.

For typical applications of the CurrentWatch ECSTD Series, see listing below.

Product Features

• Adjustable Start-Up/Delay Timer — Field adjustable from 0 – 15 seconds to eliminate nuisance alarms due to start-up inrush or temporary overcurrent conditions
• Choice of N.O./N.C. AC or Universal Outputs — Contact ratings of 1.0A @ 240V AC or universal outputs of 0.15A @ 240V AC/DC (N.O. models) and 0.2A @ 135V AC/DC (N.C. models) for use with most standard motor control systems
• Improved Ease of Installation and Use — Self-powered, split-core models simplify installation, 1.0A AC rating eliminates need for time delay relay, and status LED provides visual indication of setpoint trip and contact action
• Industrial Grade Performance — Constant hysteresis and linear response characteristics enhance setpoint accuracy
• Agency Approved — UL Listed, CE pending

Typical Applications

• Motor Protection — Serves as an electronic proof-of-operation; detects current draw changes in motors when they encounter problems such as pumps running dry or pending bearing failure; non-intrusive and less expensive to install than differential pressure flow sensors or thermal switches; much quicker response time than Class 10 overload relays
• High Inrush or Temporary Overload Current — Adjustable start-up/delay timer allows 0 – 15 second delay to eliminate nuisance trips from high inrush or short overload conditions

Approvals

• UL Listed