Phoenix Contact EMD-BL compact monitoring relays

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The EMD-BL compact monitoring relays from Phoenix Contact monitor current, voltage and phase sequence. With space-saving installation housing and equipped with the push-in quick-connection technology, the devices allow for quick, tool-free wiring. They are particularly suitable for simple monitoring tasks from series production through to building installations.

The product family includes four types of devices. For single-phase networks, there is also a voltage monitoring relay with measurement ranges up to 24 V AC/DC and 230 VAC in addition to the current monitoring relays for alternating currents up to 10A. In three-phase networks, an additional voltage monitoring relay detects AC voltages up to 400 or 230 VAC with adjustable measurement ranges. A phase-monitoring relay indicates errors in the phase sequence, phase failure and asymmetries in networks up to 480 VAC or 277 VAC.

All parameters, such as monitoring areas and tripping delay, can be easily adjusted using the rotary switch located at the front, and the highly readable LEDs provide for quick on-site analysis.