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Member of
Open DeviceNet
Vendors Assoc.
DeviceNet

Developer of RTD
temperature sensor
for DeviceNet
Enter DeviceNet
Temperature
Sensor

 

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E3 Solid-State Overload Relay
Features



E3 Solid-State Overload Relay


Patented, State-of-the-Art Current Sensing

 The E3 overload relay uniquely combines the technologies of hall-effect current sensors with signal processing circuitry and software algorithms for precise, true RMS current measurement of the individual phase and ground fault currents. Current measurement is accurately reported over a broad frequency range of 20 to 250 hz. There are two versions available, the E3 and the E3 Plus, enabling you to choose the appropriate device for your application.

E3 and E3 Plus Comparison
Features E3      E3 Plus
Thermal Overload Yes Yes
Phase Loss Yes Yes
Stall (high overload during start) Yes Yes
Jam (high overload during run) Yes Yes
Underload Yes Yes
Current Imbalance (asymmetry) Yes Yes
Warning Settings Yes Yes
Inputs 2 4
Outputs 1 2
Ground (earth) Fault No Yes
PTC Thermistor Input No Yes


Application-Specific Adjustability

User-adjustable parameters for all trip and warning functions allow the E3 overload relay to be tailored to fit any application.

Thermal Overload

  • Trip class adjustable from 5 to 30 in increments of one

  • Automatic and manual reset modes are available

  • Reset level adjustable from 1 to 100% thermal capacity utilized

  • Warning level adjustable from 1 to 100% thermal capacity utilized


Phase Loss

  • Trip level factory set at 100% current imbalance

  • Trip delay adjustable from 0.1 to 25.0 seconds


Ground (Earth) Fault (E3 Plus)

  • Built-in sensor

  • Trip level adjustable from 1.0 to 5.0 amperes

  • Trip delay adjustable from 0.1 to 25.0 seconds

  • Warning level adjustable from 1.0 to 5.0 amperes


Stall (high overload during start)

  • Trip level adjustable from 50 to 600% FLA

  • Enable time adjustable from 0 to 250 seconds


Jam (high overload during run)

  • Trip level adjustable from 50 to 600% FLA

  • Trip delay adjustable from 0.1 to 25.0 seconds

  • Warning level adjustable from 50 to 600% FLA


Underload

  • Trip level adjustable from 50 to 100% FLA

  • Trip delay adjustable from 0.1 to 25.0 seconds

  • Warning level adjustable from 50 to 100% FLA


Motor Over-temperature (E3 Plus)

  • Terminals provided for connection of motor winding-embedded positive temperature coefficient PTC thermistors

  • Provides enhanced motor protection in cases where motor overheating cannot be detected by monitoring current alone (blocked ventilation and high ambient temperature)

  • Current Imbalance (Asymmetry)

  • Trip level adjustable from 10 to 100%

  • Trip delay adjustable from 0.1 to 25.0 seconds

  • Warning level adjustable from 10 to 100%

 

Accessing Vital Data Via DeviceNet


Motor Current Monitoring

 The following motor performance data is accessible via the DeviceNet network:

  • Individual phase currents (in amperes)

  • Individual phase currents (as a percentage of motor full load current)

  • Average current (in amperes)

  • Average current ( as a percentage of motor full load current)

  • Percentage of thermal capacity utilized

  • Current imbalance percentage

  • Ground fault current (in amperes)


Motor Diagnostics

The following diagnostic information is accessible via the DeviceNet network:

  • Device status

  • Trip status

  • Warning status

  • Time to trip (overload)

  • Time to reset (overload)

  • History of past 5 trips


Integrated I/O

The E3 overload relay provides inputs and outputs that can simplify the control architecture and minimize hardware requirements. The inputs allow the master device such as a programmable controller to monitor the status of typical devices like short circuit interrupters, contactors, pilot devices and sensors. The output relays can be used by the master device to operate motor starting contactors, pilot lights, circuit breaker shunt trips and brake contactors. The monitor parameter group provides motor performance data, diagnostic and device status information. 

DeviceNet Features

  • Autobaud circuitry speeds up node commissioning time.

  • Choice of polled I/O, cyclic or change of state(COS) messaging-provides communication mode that fits the application.

  • Off-line node recovery allows commissioning of many devices onto a network at the same time.

  • Full parameter object support allows a configuration tool to easily upload the device electronic data sheet (EDS).

  • Configuration consistency check provides simple verification of product configuration.

  • Configured using RSNetWorx™ for DeviceNet software


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