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Power Monitoring and Protection
Power Monitoring and Protection

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355 Series

MotorSaver™ Three-Phase Voltage Monitor

MotorSaver™ 355 Series Three-Phase Voltage Monitors are designed to protect three-phase motors regardless of size. The 355-200 model monitors 190-240 VAC input voltages, the 355-400 model monitors 380-480 VAC input voltages, and the 355-600 model monitors 575-600 VAC input voltages. The unique microprocessor-based voltage and phase-sensing circuit constantly monitors the three-phase voltages to detect harmful power line conditions, including single phasing, low-voltage, phase reversal, voltage unbalance, and high voltage. When a harmful condition is detected, the 355 Series output relays are deactivated after an adjustable trip-delay time period. The output relay reactivates after power line conditions return to an acceptable level for an adjustable restart delay time. The trip and reset delays prevent nuisance tripping due to rapidly fluctuating power line conditions.


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Features
  • Protection of three-phase motors from loss of any phase, low-voltage, phase reversal, voltage unbalance, and high voltage
  • Adjustable restart delay
  • Adjustable trip delay
  • Adjustable voltage-unbalance trip point
  • Four diagnostic LEDs show overvoltage, undervoltage, voltage unbalance, reverse-phase and normal conditions
  • UL and ULC listed
  • Single-phase condition detection regardless of regenerated voltages
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Specifications

Supply Watts:6W maximum

Frequency:50*/60 Hz

Contact Rating:SPDT, pilot duty 470 VA @ 600 VAC (400 or 600V range) General-purpose 10A @ 240 VAC (200V range)

Transient Protection:2500V for 10 ms

Line Voltage Monitored:190-240, 380-480, or 575-600 VAC

Low Voltage Trip:90% of setpoint (±1%)

Low Voltage Reset:93% of setpoint (±1%)

Reset Delay Time after Fault:Manual or 2-300 seconds

Reset Delay Time after Power Loss:Manual or 2-300 seconds

Trip Delay Time High Voltage:2-30 seconds, adjustable

Trip Delay Time Low Voltage:2-30 seconds, adjustable

Trip Delay Time Phase Fault:0.5 seconds

Trip Delay Time Unbalance:2-30 seconds, adjustable

Voltage Unbalance Reset:Trip setting minus 1%

Voltage Unbalance Trip:2% to 8%, adjustable

Dimensions:2.9"H x 5.25"W x 2.9"D

(7.4 x 13.3 x 7.4 cm):

Weight:1.0 lb (0.45 kg)

Approvals:UL and cUL listed, File #E68520

Warranty 5 years:

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Certifications




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Products

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QtyModelDescriptionIn StockList PriceInternet Price
355-200 3PH VOLT MONITOR 190-240V SPDT INFO421.27337.02
355-400 3PH VOLT MONITOR 380-480V SPDT In Stock459.77367.82
355-600 3PH VOLT MONITOR 575-600V SPDT INFO459.77367.82
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