Simplify relay setting and application while reducing inventory by using one relay for all of your capacitor bank needs. The versatile SEL-487V Capacitor Bank Protection and Control System can handle grounded and ungrounded, single- and double-wye capacitor bank applications. It provides sensitive voltage differential and current unbalance protection with compensation adjustment for small voltage differential levels due to variations in individual capacitor elements from manufacturing, PT, or instrument transformer measurement errors. Application-based settings simplify setup and installation while fault-finding logic locates faulty capacitor units to speed up necessary maintenance. Synchrophasor technology provides situational awareness and real-time control.

Applications

Capacitor Bank Protection—Protect a variety of capacitor configurations, including grounded and ungrounded, single- and double-wye configurations. The SEL-487V has phase- and neutral-current unbalance elements and phase- and neutral-voltage differential elements to provide reliable protection for virtually any application. Apply the IEC 60255-149-compliant thermal model to trigger control actions or issue warnings in adverse operating conditions.

Faulted-Capacitor Location—Save time and money using the relay’s advanced faulted-phase identification logic. The relay provides discrete indications for the phase and location of faulted capacitor units for efficient dispatch of personnel.

Capacitor Bank Monitoring—Record disturbances automatically at key capacitor bank locations using optional voltage sag, swell, and interruption (VSSI) recording. Harmonic metering provides measurements from the fundamental through 15th harmonic as well as information on total harmonic distortion.

Capacitor Control—Obtain full control of capacitor banks without additional devices. The SEL-487V-1 can operate the capacitor bank based on voltage, VAR, power factor, or time-of-day/ day-of-week scheduling. Use local and remote data from IEEE C37.118-compliant synchrophasors to make operation decisions with the real-time control system.