{"product_id":"ge-multilin-239-motor-protection-relay-series","title":"GE Multilin 239 Motor Protection Relay Series","description":"\u003ch2\u003eGE 239 Multilin Series\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE Multilin 239\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eGE 239\u003c\/strong\u003e Motor Protection Relay, operates as a dedicated hardware component for continuous three-phase AC motor monitoring and thermal overload protection within industrial power networks. Configured for microsecond-level fault evaluation via current transformer (CT) input scaling and resistance temperature detector (RTD) matrices, the device isolates downstream motor loads by executing definitive trip logic during mechanical jam or electrical unbalance anomalies.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eGE Multilin 239\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Vernova (formerly GE Grid Solutions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard DIN panel\/rack configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e15 W maximum (nominal operating load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Functions\u003c\/td\u003e\n\u003ctd\u003eThermal overload, phase unbalance, ground fault, jam, locked rotor, undercurrent, overcurrent, loss of load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensing Interfaces\u003c\/td\u003e\n\u003ctd\u003eMultiple RTD input channels and current transformer (CT) inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interface\u003c\/td\u003e\n\u003ctd\u003eRS485 serial port utilizing Modbus RTU protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Matrices\u003c\/td\u003e\n\u003ctd\u003eProgrammable logic trip outputs, alarm relays, breaker control relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Upgrades\u003c\/td\u003e\n\u003ctd\u003eHarsh environment conformal coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLife Cycle Status\u003c\/td\u003e\n\u003ctd\u003eLegacy hardware (discontinued by manufacturer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, UL, CSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Network Interface and Control Logic\u003c\/h3\u003e\n\u003cp\u003eThe processing architecture utilizes a dedicated internal backplane to execute instantaneous calculations for phase unbalance coefficients and inverse-time thermal curves. The embedded serial module maintains a deterministic network interface via RS485 infrastructure, allowing real-time mapping of fault data and trip logs into centralized SCADA platforms using the Modbus RTU protocol. Firmware flash routines ensure that programmable logic functions and trip output relays operate synchronously, keeping internal signal execution latency below defined industry limits during motor starting or high-current lockups.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the GE 239 manage real-time motor thermal tracking?\u003c\/p\u003e\n\u003cp\u003eA: The relay maps electrical current from external CT lines and directly measures ambient and winding temperatures via multiple RTD sensor linkages to calculate cumulative thermal degradation in real time.\u003c\/p\u003e\n\u003cp\u003eQ: What communications interface is used to pull diagnostics from this legacy hardware?\u003c\/p\u003e\n\u003cp\u003eA: The device features a hardware-integrated RS485 serial terminal port that streams process values and cause-of-trip logs via the standard Modbus RTU protocol.\u003c\/p\u003e\n\u003cp\u003eQ: Can this unit execute physical breaker control commands directly from the panel enclosure?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the integrated hardware architecture contains dedicated, field-programmable logic blocks mapped directly to mechanical trip and alarm contact outputs for external breaker control.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIsolate and short-circuit all current transformer secondary leads prior to executing terminal modifications or removing the module chassis to prevent dangerous high-voltage transients.\u003c\/li\u003e\n\u003cli\u003eEnsure a stable, solid chassis-to-ground copper strap connection is established between the relay frame and the enclosure earth bus to shield low-voltage RTD circuitry from electromagnetic noise.\u003c\/li\u003e\n\u003cli\u003eRoute the RS485 serial communication cables through dedicated, shielded twisted-pair runs separate from high-power AC lines to minimize signal cross-talk and data packet dropouts.\u003c\/li\u003e\n\u003cli\u003eVerify that the terminal screw block is properly locked and that wire gauges conform to the system continuous current capacity rating before restoring primary control power.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GE Fanuc","offers":[{"title":"Default Title","offer_id":43870215569507,"sku":"239","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/317_5368daa2-b7fd-4d2a-a43e-46ad52dfdd0b.jpg?v=1764809355","url":"https:\/\/www.autocontrolglobal.com\/products\/ge-multilin-239-motor-protection-relay-series","provider":"AutoControl Global","version":"1.0","type":"link"}