ABB 1495B30A21 Voltage Relay

The ABB 1495B30A21 CV-7 Voltage Relay is a compact ABB CV-7 class voltage-monitoring relay designed to supervise line voltage in control circuits and drive signaling or control contacts when preset conditions are met. The device is specified for 120–140 VAC sensing and supports a 250 VDC rating for its control/logic interface, making it suitable for panel installations in industrial automation, motor control, and power-distribution panels. CV-series relays combine a voltage-sensing unit, an auxiliary relay, and an indicating contactor switch (ICS) within a single package, enabling straightforward integration with existing control architectures and signaling devices. The 1495B30A21 designation identifies this exact configuration within the CV-7 family, ensuring consistent compatibility with ABB CV-series hardware and compatible interfaces. Typical applications include voltage supervision for circuit-breaker tripping logic, motor starters, and safety interlock systems where reliable voltage monitoring is critical.