ASCO 214A-156 Underfrequency Monitor Relay Module

ASCO 214A-156 Underfrequency Monitor Relay Module is a dedicated 240 VAC monitoring relay designed to detect underfrequency events in electrical systems and initiate a protective action via its relay output. When the monitored frequency falls to 59.3 Hz, the unit triggers a trip after a fixed 0.120-second time delay, providing a predictable response while avoiding nuisance trips from transient fluctuations. This model belongs to ASCO's 214A line of monitor relays, offering a standalone module intended for integration into control panels and protection schemes where frequency stability is essential. Verified specifications for the 214A-156 include 240 VAC input, trip frequency 59.3 Hz, and a timing delay of 0.120 seconds; these data points are critical for selecting appropriate protection logic and ensuring compatibility with existing ASCO equipment. By delivering a clear underfrequency trip point and defined delay, the 214A-156 helps maintain power system reliability and enables deterministic action in protection schemes.