Model EX264-380 3-Phase Monitor

EX257B-380VAC

The Model EX264-380 3-Phase Monitor provides essential protection for industrial systems. Operating at a nominal 380VAC with an adjustment range of 300-400V, this unit safeguards equipment against critical power anomalies. It detects phase loss, low voltage, and phase reversal, preventing potential damage and operational downtime. The monitor features robust output contacts, including one SPST N.O. and one SPST N.C., rated for 10 amps at 240VAC resistive, ensuring reliable control. With a mechanical relay life of 10 million operations and an electrical life of 100,000 operations at rated load, the EX264-380 offers sustained performance. Its response time ranges from 0.2 to 20 seconds, with a rapid 0.15-second reset. The unit operates effectively from -20° to +130° F with 0-97% humidity tolerance. An automatic reset function and a 5-year unconditional warranty underscore its utility and dependability in demanding environments.

3Ph Pwr Mon

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ex257b-380vac

Specifications

Nominal AC Voltage (phase to phase)380VAC
Adjustment Range300-400V
Frequency50Hz
Power Consumption (per phase)1.5W
Transient Protection2500VAC for 10ms
Repeat Accuracy± 0.1% of set point (fixed conditions)
Response Time.2 +/- .2 to 20 +10/-2 seconds
Reset Time0.15 seconds
Reset TypeAutomatic
Dead BandApproximately 8% of 125VAC or 10VAC
Output ContactsOne (1) SPST N.O. One (1) SPST N.C.
Contact Rating10 amps at 240VAC resistive
Expected Relay Life (Mechanical)10 million operations
Expected Relay Life (Electrical)100,000 operations at rated load
Operating Temperature-20° to +130° F
Humidity Tolerance0-97% w/o condensation
Enclosure Material20 gauge steel
MountingSurface
Warranty5 Year Unconditional Warranty
ProtectionDetects Phase Loss, Low Voltage, Phase Reversal

FAQs

What nominal voltage does the EX264-380 monitor?
The Model EX264-380 monitors a nominal AC voltage of 380VAC, with an adjustment range from 300-400V.
What types of electrical faults does the EX264-380 detect?
This 3-Phase Monitor detects phase loss, low voltage, and phase reversal to protect connected equipment.
What are the contact ratings for the output relays on the EX264-380?
The output contacts include one SPST N.O. and one SPST N.C., rated for 10 amps at 240VAC resistive.