Description
The Model 2500 3-Phase Monitor
is designed to continuously monitor 3-phase power lines for
abnormal conditions. This device features solid-state voltage
and phase-angle sensing circuits, which drive a SPDT electromechanical
output relay.
When the correct voltage
and phase sequence is applied to a specified Model 2500,
the output relay will not energize. An under voltage, phase
reversal, phase unbalance or phase loss condition will cause
the output relay to energize, even if regenerated voltage
is present. Complete power loss will not cause Model 2500
to trip. The 2501 version of this unit operates in fail-safe
mode, and the contacts de-energize on a fault condition.
A neutral connection is not required, allowing the Model
2500 or 2501 to be used with either Wye or Delta system
configurations.
Each option on the Model
2500 or 2501 monitor is adjustable throughout its operating
range. The adjustment pots and LED indicators for VOLTAGE
ADJUST, UNBALANCE ADJUST and TIME DELAY are mounted on the
front of the unit for easy
access.
Seven versions of the Model
2500 or 2501 cover voltage ranges from 120 to 600 VAC, and
are UL Listed and CSA Certified.
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•
Monitors phase loss or reversal, low voltage or voltage
unbalance
• UL Listed; CSA Certified
• 5-Year unconditional
warranty
• Automatic reset
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Applications
