{"product_id":"ge-multilin-745-w2-p5-g5-hi-transformer-protection-relay","title":"GE Multilin 745-W2-P5-G5-HI Transformer Protection Relay","description":"\u003ch2\u003eGE Multilin 745-W2-P5-G5-HI Transformer Protection Relay\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE Multilin 745-W2-P5-G5-HI\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e745\u003c\/strong\u003e Transformer Protection Relay, operates as a dedicated hardware component for two-winding transformer differential protection, monitoring, and control within transformer protection system platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003e745-W2-P5-G5-HI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Multilin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e9 in H x 7 1\/8 in D x 7 in W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e15 W typical, 35 W maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e745 Transformer Protection System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eTransformer Protection Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Power Supply\u003c\/td\u003e\n\u003ctd\u003e90-300 VDC \/ 70-265 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e50 Hz \/ 60 Hz, tracking range 45 to 65 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase Current Input\u003c\/td\u003e\n\u003ctd\u003e5 A secondary CT input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround Current Input\u003c\/td\u003e\n\u003ctd\u003e5 A secondary CT input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Relay Input\u003c\/td\u003e\n\u003ctd\u003e60 to 120 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Burden\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.2 VA at 5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Continuous Rating\u003c\/td\u003e\n\u003ctd\u003e20 A continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOvercurrent Withstand\u003c\/td\u003e\n\u003ctd\u003e500 A for 1 second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e40 character LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003eRS232, RS485, RS422\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eModbus RTU \/ ASCII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Network and Industrial Control Interface Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe GE Multilin 745 relay incorporates industrial communication functions for transformer monitoring and protection system integration. RS232 front panel communication provides local maintenance access, while rear RS485 and RS422 ports support Modbus RTU communication with supervisory control systems.\u003c\/p\u003e\n\u003cp\u003eThe relay processes transformer electrical measurements including phase current, ground current, frequency, harmonic content, loading condition, and thermal operating parameters. Event recording functions include oscillography, waveform capture, fault records, and operational logs for protection analysis.\u003c\/p\u003e\n\u003cp\u003eThe protection firmware executes transformer-specific algorithms including restrained differential protection (87T) with harmonic restraint\/blocking, instantaneous differential overcurrent protection (87H), phase and ground overcurrent protection, negative sequence protection, thermal overload modeling, and volts-per-hertz overexcitation monitoring.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What current transformer inputs are supported by the 745-W2-P5-G5-HI configuration?\u003cbr\u003eA: The P5 option provides 5 A phase current CT inputs and the G5 option provides 5 A ground current CT inputs for transformer protection measurement circuits.\u003c\/p\u003e\n\u003cp\u003eQ: Does the relay support hot-swapping during energized operation?\u003cbr\u003eA: The 745-W2-P5-G5-HI is designed as a panel-mounted protection relay. Hot-swap operation is not specified. Installation and replacement should be performed with the protection circuit isolated according to site procedures.\u003c\/p\u003e\n\u003cp\u003eQ: What communication interfaces are available for integration?\u003cbr\u003eA: The relay provides an RS232 front maintenance port and RS485\/RS422 rear communication ports supporting Modbus RTU protocol.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the relay in a suitable protective panel enclosure with controlled wiring separation between power circuits, CT measurement circuits, communication cables, and auxiliary control wiring.\u003c\/p\u003e\n\u003cp\u003eCurrent transformer secondary wiring should use dedicated terminal connections with correct polarity verification before energization. CT circuits must not be opened while energized.\u003c\/p\u003e\n\u003cp\u003eCommunication wiring should maintain appropriate shielding and grounding practices. Shield termination should follow the plant grounding standard to reduce electrical noise coupling.\u003c\/p\u003e\n\u003cp\u003eProvide adequate clearance for relay ventilation and service access. Verify control power polarity and voltage range before applying auxiliary supply.\u003c\/p\u003e\n\u003cp\u003eProtection settings, CT ratios, transformer parameters, and trip output logic should be validated during commissioning using approved protection testing equipment.\u003c\/p\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":44508299329624,"sku":"745-W2-P5-G5-HI","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/745-W2-P5-G5-HI-A-L-R-E-H.jpg?v=1786007490","url":"https:\/\/www.industriaxplc.com\/ar\/products\/ge-multilin-745-w2-p5-g5-hi-transformer-protection-relay","provider":"IndustriaX Limited","version":"1.0","type":"link"}