• SUA-230-ALA  Phase Sequence Loss Monitor 350-440 volts
Item Number:   SUA230ALA
Brand:   Diversified Electronics
Item Category:   Protection Relays
Series:   SUA
  No. of Phases:   3
  Voltage Supported:   350 to 440 Volts
  Amperage Supported:   10 Amps
  Lo Pwr (Under Vltg) Trip:   Yes
  Ph Loss Detect:   Yes
  Ph Rvrse/Rotatn Detect:   Yes
  Time Delay Trip (Sec):   0.5
  Manual Reset:   No
  Type of Display:   LED Status Indicator
  Mounting:   Plug-in


SLA Series Three-Phase Monitoring Relay
Operating voltage: 430-480 Adj.
Adjustment: Screwdriver
1 Ø LOW: 357-398
3 Ø LOW: 387-432
SPDT, 360 VA Inductive; 10 Amps
Resistive @ 240 VAC, Figure 1
• Models available up to 480 VAC
• Protects 3-Phase Equipment Against:
o Phase Loss
o Under Voltage
o Phase Reversal
o Delta or Wye Systems
• Fixed, Lock Shaft, or Screwdriver Adjustment
• Several Enclosure Styles
The Marsh Bellofram SLA series is a family of three-phase universal phase monitoring relays, designed to provide cost-effective protection against from phase loss, under voltage, and phase reversal conditions that can contribute to premature motor or equipment failure and downtime on three-phase systems (Delta and Wye), such as those typically found in motor control centers or other critical motor and pump monitoring applications. With normal operating voltages applied in the proper ABC sequence, the internal relay will energize (PICK-UP). When incorrect phase sequence or phase loss occurs or the three-phase voltages fall below dropout voltages, the relay will de-energize (DROP-OUT). On models featuring indicators, the LED glows when all line conditions are normal. Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.
For UL Listed units, with field wiring terminals, copper wire with 60°/75°C rating must be used for control circuitry connections. NOTE: When a phase is lost while the motor is running, a condition known as regeneration occurs where a voltage is induced into the open phase nearly equal in magnitude to the normal phase-to-phase voltage. However, with the exception of lightly loaded motors, enough change is detected by the SLA to provide the required protection when properly adjusted.
• Critical motor and pump monitoring
• Water and wastewater plants
• Sewage plants
• Booster stations
• Grinders
• Irrigation equipment
• Petrochemical
• Machine Tool
• Conveyors
• Elevators/escalators
• Utilities
• Processing equipment
• Agricultural machinery and equipment
• Renewable energy – wind power turbine monitoring

SUA-230-ALA Phase Sequence Loss Monitor 350-440 volts

  • $168.02

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