{"product_id":"745-w2-p5-g5-hi-a-e-745-ge-multilin-transformer-protection-relays","title":"745-W2-P5-G5-HI-A-E 745 GE Multilin Transformer Protection Relays","description":"\u003ch2\u003eGE Multilin 745-W2-P5-G5-HI-A-E Transformer Protection System\u003c\/h2\u003e\n\u003cp\u003eConfigured for two-winding transformer protection in power distribution networks, the \u003cstrong\u003eGE Multilin 745-W2-P5-G5-HI-A-E\u003c\/strong\u003e (\u003cstrong\u003e745\u003c\/strong\u003e Transformer Protection System) provides direct physical\/electrical execution. The relay evaluates secondary phase currents and residual ground currents, executing dual-slope percent differential trip equations, restricted ground fault logic, and harmonic restraint algorithm processing to isolate primary grid faults.\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\u003e745-W2-P5-G5-HI-A-E\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e7.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e6.0 cm x 23.0 cm x 25.5 cm\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\u003e90-300 VDC or 70-265 VAC at 48-62 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003e745\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eMultilin 745\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eTransformer Protection Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eTwo-winding transformers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Logic\u003c\/td\u003e\n\u003ctd\u003eDual-slope percent differential, restricted ground fault, overexcitation blocking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTap Position Input\u003c\/td\u003e\n\u003ctd\u003e0-500 ohm or 0.5-5.0 kohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity Tolerance\u003c\/td\u003e\n\u003ctd\u003eUp to 90% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Frequency\u003c\/td\u003e\n\u003ctd\u003e50 Hz or 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration Software\u003c\/td\u003e\n\u003ctd\u003eEnerVista 745\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003ePanel-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eCE, ISO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity \u0026amp; Deterministic Logic Execution\u003c\/h3\u003e\n\u003cp\u003eThe system executes high-speed current transformer signal sampling across dedicated analog conditioning channels, passing digitized values across internal bus backplanes to maintain protection trip calculations without phase lag. Microprocessor execution pipelines evaluate 2nd and 5th harmonic content to block differential tripping during transformer magnetizing inrush and overexcitation conditions. Firmware flash compatibility ensures synchronized register mapping across internal memory banks, enabling high-density data logging, event recorder logging, and oscillography telemetry polling without consuming main protection CPU processing capacity.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the 745-W2-P5-G5-HI-A-E prevent false differential tripping during transformer energization?\u003c\/p\u003e\n\u003cp\u003eA: The relay uses microprocessor-based 2nd harmonic restraint algorithms to detect magnetizing inrush current and temporarily inhibit differential trip contact output state changes.\u003c\/p\u003e\n\u003cp\u003eQ: What primary control power supply ranges are supported on the HI voltage model?\u003c\/p\u003e\n\u003cp\u003eA: The HI control power supply board accepts an input range of 90-300 VDC or 70-265 VAC at 48-62 Hz.\u003c\/p\u003e\n\u003cp\u003eQ: What grounding procedure must be executed prior to applying primary AC current inputs?\u003c\/p\u003e\n\u003cp\u003eA: The rear chassis copper ground lug must connect directly to the substation earth bus via a low-impedance copper conductor before terminating current transformer secondary connections.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eIsolate high-voltage power lines and verify complete primary transformer de-energization using verified potential indicators prior to installing hardware.\u003c\/li\u003e\n\u003cli\u003eShort-circuit all CT secondary leads at the panel test switch block before attaching wiring harnesses to the relay backplane terminal blocks.\u003c\/li\u003e\n\u003cli\u003eSecure the relay frame into the panel cutout using standard mounting hardware, ensuring solid metal-to-metal contact to establish local cabinet frame bonding.\u003c\/li\u003e\n\u003cli\u003eRoute ground conductors directly from the chassis grounding stud to the main panel earth rail, maintaining minimal lead length to reduce RF ground loop impedance.\u003c\/li\u003e\n\u003cli\u003eConnect control power wiring, verify input voltage limits with a digital multimeter, and energize the relay to complete hardware self-test diagnostic routines before opening CT shorting links.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"GE Fanuc","offers":[{"title":"Default Title","offer_id":43820650987619,"sku":"745-W2-P5-G5-HI","price":370.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/118_dea8e826-fd1d-4a09-bd89-2cd09bed6f90.jpg?v=1762417064","url":"https:\/\/www.autocontrolglobal.com\/products\/745-w2-p5-g5-hi-a-e-745-ge-multilin-transformer-protection-relays","provider":"AutoControl Global","version":"1.0","type":"link"}