{"product_id":"crompton-256-pas-protector-trip-relay","title":"Crompton 256-PAS  Protector Trip Relay","description":"\u003cp\u003eThe \u003cstrong\u003eCrompton Instruments 256-PAS\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e256-PAS\u003c\/strong\u003e Power Relay, operates as a dedicated hardware component for reverse power protection within AC generator networks. It measures directional real power flow natively at the electrical tier to execute protective trip functions parallel to master control network platforms when synchronized assets experience motoring conditions.\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\u003e256-PAS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eCrompton Instruments (TE Connectivity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited Kingdom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 250 Series housing envelope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eIndustrial cabinet standard limits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSourced via monitored voltage lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunctional Device Code\u003c\/td\u003e\n\u003ctd\u003eANSI 32 (Reverse Power Relay)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Delay Adjustment\u003c\/td\u003e\n\u003ctd\u003e0 to 20 s continuous variable dial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Threshold Range\u003c\/td\u003e\n\u003ctd\u003e2% to 20% of rated capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Ratings\u003c\/td\u003e\n\u003ctd\u003e5 A at 250 VAC \/ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control \u0026amp; Drive Integration\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Communication Velocity Licences and Relay Interlocking:\u003c\/strong\u003e The standalone protective module interfaces with generator breaker trip circuits via heavy-duty electro-mechanical contact blocks. It executes safety-critical trip curves locally, isolating the prime mover without relying on external backplane bus communication velocity data packets or secondary automation processor intervention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfinet \/ EtherNet\/IP Deterministic Networks Fault Tracking:\u003c\/strong\u003e Auxiliary contacts on the output circuit pass physical open\/closed state telemetry to intermediate RTUs or PLC input lines. This design provides real-time fault mapping across Profinet \/ EtherNet\/IP deterministic networks to log reverse-power sequence events on supervisory SCADA consoles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O Density Scaling and Local Control Topology:\u003c\/strong\u003e Integrating the absolute current transformation and timing circuitry into a self-contained unit optimizes standard panel I\/O density scaling. The local processing layout eliminates the need for high-speed analog processing modules inside the main control rack by handling true power vectors directly at the point of measurement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What technical behaviors manifest within the internal measurement loop if the prime mover fails and the generator begins motoring?\u003c\/p\u003e\n\u003cp\u003eA: The voltage and current phase alignment shifts past 90 degrees, signaling a reversal of real power flow into the stator. Once the negative magnitude surpasses the calibrated 2% to 20% dial setpoint, the internal timing circuit starts down, firing the 5 A output contacts after the set delay window closes.\u003c\/p\u003e\n\u003cp\u003eQ: Can this protective relay be mounted directly on surfaces subject to severe mechanical displacement inside engine skids?\u003c\/p\u003e\n\u003cp\u003eA: No. High mechanical shock or vibration can cause the internal electro-mechanical contact points to chatter, leading to false trips or contact degradation. The module must be snapped onto a secure 35 mm DIN rail or bolted to a rigid enclosure wall away from direct engine displacement paths.\u003c\/p\u003e","brand":"Crompton","offers":[{"title":"Default Title","offer_id":45133478592627,"sku":"256-PAS","price":410.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-06-25_10-16-52.png?v=1782355535","url":"https:\/\/www.dcssupplier.com\/ar\/products\/crompton-256-pas-protector-trip-relay","provider":"DcsSupplier Limited","version":"1.0","type":"link"}