E3 and E3 Plus Overload Relay Specifications

1 Technical DataE3 and E3 Plus Overload Relay SpecificationsBulletin Number 193, 592 Additional ResourcesThese documents contain additional information concerning related products from rockwell can view or download publications at To order paper copies of technical documentation, contact your local Allen-Bradley distributor or rockwell automation sales picPageProduct Overview2 Standards Compliance and Certifications2 Features3 Catalog Number Explanation6 General Specifications6Tr i p Cu r ve s1 1 Wiring Diagrams12 Approximate Dimensions14 ResourceDescriptionIndustrial automation Wiring and Grounding Guidelines, publication general guidelines for installing a rockwell automation industrial Certifications website, declarations of conformity, certificates, and other certification OverviewE3 and E3 Plus Overload RelaysRockwell automation Publication 193-TD012A-EN-P2 Bulletin193-EC1193-EC2/EC3193-EC5193-EC4 TypeE3 Electronic Overload RelayE3 Plus Electronic Overload RelayE3 Plus Current MonitoringRelayRated Current (Range) ANEMA Operating Voltage, Nominal600 VIEC Operating Voltage, Nominal690/1000 VOverload TypeMicroprocessor-BasedTrip Class (Fixed) Trip Class (Adjustable) Ambient TemperatureCompensated Reset TypeAutomatic and ManualAdjustment Range5:1 Phase LossAdjustable Delay Ground (Earth) Fault SensitiveSensitiveSensitiveOvercurrent (Jam) Detection Stall Detection Underload Detection Current Imbalance PTC Thermistor Monitoring Warning Settings Trip Contact Alarm Contact No.

2 Of Outputs1222No. of Inputs2464 ODVA (DeviceNet) Conformance Variable Frequency Drive (VFD)Compatible Standards ComplianceEN 60947-4-1 CSA No. 14UL 508, UL1053 (class 1)CertificationsABSCEcULus Listed (File No. E14840, Guide NKCR, NKCR7; File No. E53935, Guide KDAX)C-tickCCC3 rockwell automation Publication 193-TD012A-EN-PE3 and E3 Plus Overload RelaysFeaturesThe E3 Overload Relay is available in two configurations: the E3 andE3 Plus. The following table illustrates the functional differencesbetween the two Plus193/592-EC1193/592-EC2193/592-EC3193 -EC4193/592-EC5 Inputs 24 4 4 6 Outputs12222 PTC Thermistor Input Ground Fault AExternal20 A External20 A External20 A DeviceLogix Heat Trace Voltage Monitoring Inputs are rated 24V DC. Voltage sensing range is Hz Requires the use of an external ground fault sensor, Cat. No. OverloadThermal UtilizationThe E3 Overload Relay provides Overload protection through trueRMS current measurement of the individual phase currents of theconnected motor.

3 Based on this information, a thermal model thatsimulates the actual heating of the motor is calculated. Percent ofthermal capacity utilization (%TCU) reports this calculated value andcan be read via the DeviceNet network. An Overload trip occurswhen the value reaches 100%.Adjustable SettingsThermal Overload protection setup is accomplished simply byprogramming the motor s full load current (FLC) rating and thedesired trip class ( ). Programming of the actual values throughsoftware programming ensures the accuracy of the MemoryThe E3 Overload Relay includes a thermal memory circuit designedto approximate the thermal decay for a trip class 30 setting. Thismeans that the thermal model of the connected motor is maintainedat all times, even if the supply power is ModesThis flexibility allows the end-user in the ability to select betweenmanual and automatic reset for an Overload trip, allowing for broadapplication.

4 The point of reset is user adjustable from to TripDuring an Overload condition, the E3 Overload Relay provides anestimated time to trip that is accessible via the DeviceNet allows corrective action to be taken so that production maycontinue to ResetFollowing an Overload trip, the E3 Overload Relay will not reset untilthe calculated percentage of thermal capacity utilization falls belowthe reset level. As this value decays, the time to reset, which isaccessible via the DeviceNet network, is WarningThe E3 Overload Relay provides the capability to alert in the eventof an impending Overload trip. A thermal warning bit is set in theWarning Status when the calculated percentage of thermal capacityutilization exceeds the programmed thermal warning level, whichhas a setting range of ProtectionThe E3 Plus Overload Relay offers a second FLA setting for 2-speedmotor protection.

5 What used to require two separate Overload relays- one for each set of motor windings - can now be accomplishedwith one device. Improved protection is delivered as thermalutilization is maintained in one device during operation in LossThe E3 Overload Relay offers configurable phase loss protection,allowing the installer to enable or disable the function plus set atime delay setting, adjustable from seconds. The trip levelis factory-set at a current imbalance measurement of 100%.Ground (Earth) FaultThe E3 Plus Overload Relay incorporates zero sequence (corebalance) sensing into its design through the 90 A rating for low level(arcing) ground fault detection. Trip and warning settings areadjustable from 20 A. For devices rated greater than 90 Aand for ground fault detection less than A, the external corebalance current transformer accessory is required. Class Iprotection is provided as defined by UL1053.

6 Series B or laterdevices provide a trip-inhibit setting, offering flexibility to preventtripping when the ground fault current magnitude exceeds 10 can be useful to guard against the opening of the controllerwhen the fault current could potentially exceed the controller'sinterrupting capacity :The E3 Plus Overload Relay is nota Ground Fault CircuitInterrupter for personnel protection as defined in article 100of the National Electric "Stall" is defined as a condition where the motor is not able to reachfull-speed operation in the appropriate amount of time required bythe application. This can result in motor overheating as current drawis in excess of the motor s full load current E3 Overload Relay provides user-adjustable stall protection. Thetrip setting has a range of FLA, and the enable time isadjustable up to 250 (Overcurrent)The E3 Overload Relay can respond quickly to take a motor off-linein the event of a mechanical jam, thereby reducing the potential fordamage to the motor and the power transmission adjustments include a trip setting adjustable from and a trip delay time with a range of seconds.

7 Aseparate warning setting is adjustable from (Undercurrent)A sudden drop in motor current can signal conditions such as: Pump cavitation Tool breakage Belt breakageFor these instances, rapid fault detection can help minimize damageand aid in reducing production , monitoring for an underload event can provideenhanced protection for motors that are coded by the mediumhandled ( , submersible pumps that pump water). Such motorscan become overheated despite being underloaded. This can resultfrom an absence or an insufficient amount of the medium (due toclogged filters, closed valves, etc.).The E3 Overload Relay offers underload trip and warning settingsadjustable from FLA. The trip function also includes atrip delay time with a range of ProtectionThe E3 Plus Overload Relay provides motor over-temperatureprotection with the added provisions for terminating and monitoringof stator windingembedded positive temperature coefficient (PTC)thermistors.

8 PTC thermistors are semiconductors that exhibit a largeincrease in resistance when the rated response temperature isexceeded. When the monitored PTC thermistor resistance exceedsthe response level of the E3 Plus Overload Relay (3400 ), it can beset to trip immediately or programmed to set the PTC bit of theWarning Status Imbalance (Asymmetry)The E3 Plus Overload Relay offers current imbalance trip andwarning settings adjustable from The trip function alsoincludes a trip delay time with a range of automation Publication 193-TD012A-EN-PFeaturesE3 and E3 Plus Overload RelaysThe remote trip function allows an external device ( , a vibrationsensor) to induce the E3 Overload Relay to trip. External devicerelay contacts are wired to the E3 Overload Relay discrete discrete inputs are configurable with an option for assigningthe remote trip Monitoring FunctionsThe E3 Overload Relay allows the user to monitor the followingoperational data over the DeviceNet network: Individual phase currents in amperes Individual phase currents as a percentage of motor FLC Average current in amperes Average current as a percentage of motor FLC Percentage of thermal capacity utilized Current imbalance percentage Ground fault current (E3 Plus)Diagnostic FunctionsThe E3 Overload Relay allows the user to monitor the followingdiagnostic information over the DeviceNet network.

9 Device status History of past five trips Trip status History of positive warnings Warning status Hours of operation Time to an Overload trip Number of starts Time to reset after an overloadtrip Trip snapshotStatus IndicatorsThe E3 Overload Relay provides the following LED indicators: Network Status This green/red LED indicates the status of thenetwork connection. TRIP/WARN This LED flashes an amber code under a warningcondition and a red code when tripped. OUT A & B These amber LEDs illuminate when the outputcontacts are commanded closed. IN 1 - 4 These amber LEDs illuminate when the user-connecteddevice contact is closed.:Note:IN3 and 4 and OUT B are available only on the E3 PlusOverload Relay . Inputs/OutputsInputs allow the connection of such devices as contactor anddisconnect auxiliary contacts, pilot devices, limit switches, and floatswitches. Input status can be monitored via the network andmapped to a controller s input image table.

10 Inputs are rated 24V DCand are current sinking. Power for the inputs is sourced from theDeviceNet network connection with convenient customerterminations at control terminals 5 and 6. Relay contact outputs canbe controlled via the network or DeviceLogix function blocks forperforming such tasks as contactor ButtonThe Test/Reset button, located on the front of the E3 OverloadRelay, allows the user to perform the following: Te s t The trip Relay contact will open if the E3 Overload Relay isin an untripped condition and the Test/Reset button is pressed for2 seconds or longer. Reset The trip Relay contact will close if the E3 Overload Relayis in a tripped condition, supply voltage is present, and theTest/Reset button is OperationThe E3 Overload Relay can be applied to three-phase as well assingle-phase applications. A programming parameter is provided forselection between single- and three-phase operation.