{"product_id":"abb-spau140c-spacom-synchro-check-and-voltage-check-relay","title":"ABB SPAU140C SPACOM Synchro-check and Voltage-check Relay","description":"\u003ch2\u003eABB SPAU140C SPACOM Series Synchro-check and Voltage-check Relay\u003c\/h2\u003e\n\u003cp\u003eConfigured for phase angle, frequency, and voltage difference monitoring in power distribution networks, the \u003cstrong\u003eABB SPAU140C\u003c\/strong\u003e (\u003cstrong\u003eSPAU-140-C\u003c\/strong\u003e Numerical Synchro Relay) provides direct physical\/electrical execution. This numerical hardware component acts as a verification interface between two separate AC power sources or busbars, generating a circuit breaker release signal only when measured electrical parameters fall within programmed synchronization tolerances.\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\u003eSPAU140C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.5 kg net (Shipping weight: 5.4 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e220 mm x 150 mm x 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSupported via auxiliary power supply: 80-265 V AC or 18-80 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eSPAU-140-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Type\u003c\/td\u003e\n\u003ctd\u003eNumerical Synchro-check \u0026amp; Voltage-check\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Voltage Range\u003c\/td\u003e\n\u003ctd\u003e0.4 to 36 kV AC networks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Voltage Input (Un)\u003c\/td\u003e\n\u003ctd\u003e100\/110\/220 V AC (via external Voltage Transformer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e45 to 65 Hz (50\/60 Hz nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase Difference Setting\u003c\/td\u003e\n\u003ctd\u003eAdjustable 5 to 50 deg (1 deg resolution)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Time\u003c\/td\u003e\n\u003ctd\u003e1 ms internal processing speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Port\u003c\/td\u003e\n\u003ctd\u003eRS-485 utilizing SPA bus protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Protection\u003c\/td\u003e\n\u003ctd\u003eIP20 (Panel or Rack mounted)\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 Backplane Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe synchronization logic relies on high-speed sampling circuits that interact with the system architecture via integrated backplane bus communication velocity licences. To maintain stability across high-density systems, the relay executes voltage-check and synchro-check evaluations within a 1 ms processing window, preventing closing commands from being sent during transient grid frequency fluctuations. The unit guarantees firmware flash compatibility across legacy SPACOM networks and utilizes deterministic networks to transmit status data, alarm indicators, and measured vector parameters over the RS-485 SPA bus communication layer to centralized SCADA systems.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the relay execute a voltage-check under dead-bus or live-line conditions?\u003c\/p\u003e\n\u003cp\u003eA: The SPAU140C contains dual-stage internal logic configurations. Users program distinct voltage thresholds to define \"dead\" and \"live\" states; the relay evaluates whether the incoming line is active while the busbar is unpowered (dead-bus\/live-line) or vice versa, bypassing the phase-angle match requirement to allow safe energization of an inactive network segment.\u003c\/p\u003e\n\u003cp\u003eQ: Can the internal synchronization release relay be hot-swapped while the primary breaker circuit is energized?\u003c\/p\u003e\n\u003cp\u003eA: No, hot-swapping the internal processing module while the external breaker control loop is armed is prohibited. Unplugging the hardware under load can cause open-circuit conditions on associated current or voltage transformer inputs and may introduce unintended trip states or remove vital interlocking safety barriers from the closing circuit.\u003c\/p\u003e\n\u003cp\u003eQ: What happens if the auxiliary power supply drops below the minimum specified voltage threshold?\u003c\/p\u003e\n\u003cp\u003eA: If the auxiliary voltage falls below the internal hardware operational limits, an internal watchdog circuit drops out the self-supervision (IRF) relay. This immediately forces all synchronization output contacts to open, preventing any unsynchronized or unverified circuit breaker closure commands from being executed.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the relay housing securely within a cutout on the switchgear panel or inside a standard equipment rack slot, ensuring the IP20 enclosure is protected from conductive dust and moisture. Tighten all mounting brackets to eliminate low-frequency structural vibration near heavy circuit breakers. Connection to the primary AC network requires external voltage transformers (VTs) scaled to 100 V, 110 V, or 220 V nominal outputs. All VT secondary wiring and RS-485 communication lines must utilize twisted, fully shielded cables. Connect the shield drain wires exclusively to the main panel ground bus bar to neutralize electromagnetic interference and prevent ground loop circulating currents from distorting the micro-controller voltage measurements.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":43017004187738,"sku":"SPAU140C","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/261.jpg?v=1773034523","url":"https:\/\/www.spareoil.com\/products\/abb-spau140c-spacom-synchro-check-and-voltage-check-relay","provider":"SpareOil Automation","version":"1.0","type":"link"}