The AC-301-440 is a three-phase power monitoring relay designed to detect phase loss, undervoltage, phase reversal, power failure, and thermostat interruptions, de-energizing its control relay upon fault detection. It features an adjustable on-delay of 0.2 to 8 minutes after normal conditions are restored, with a 440V operating voltage range of 430-480 VAC. The relay offers a 10 A at 120 VAC output, built-in thermostat bypass, status LED indicators, and operates within a temperature range of −40°F to +150°F (−40°C to +66°C). It is housed in a Style E enclosure measuring 4 in × 4 in × 3.6 in, uses #8-32 screw terminals, and includes 1000 V transient protection. Phase sequence must be ABC for operation.
AC-301 SERIES THREE PHASE LINE U
| DigiKey | |
|---|---|
| Product Category | Protective Relays and Monitoring Relays |
| Product Number | 4821-AC-301-440-ND |
| Product Name | Protection Relays & Systems |
| Operating Temp | -40 to 150 F (-40 to 65.6 C) |
