Kele | 250A | MotorSaver Three-Phase Voltage Monitor

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You are Here > Catalog > Power Monitoring and Protection

Power Monitoring and Protection

250A

MotorSaver™ Three-Phase Voltage Monitor

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The MotorSaver™ 250A Three-Phase Voltage Monitor is an autoranging voltage monitor designed to protect three-phase motors regardless of size. It is used on 190-480 VAC, 50/60 Hz motors to prevent damage caused by single phasing, low voltage, phase reversal, voltage unbalance, and high voltage. Added features include DPDT contacts and an adjustable restart time-delay setting. The unique microprocessor-based voltage and phase-sensing circuit constantly monitors the three-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the Model 250A's output relays are deactivated after a fixed 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.

Features

Protection of three-phase motors from single phasing, low-voltage, phase reversal, voltage unbalance, and high voltage

Adjustable restart delay

DPDT contacts

UL and CUL listed

Bicolor LED indication of normal and fault conditions

Detection of single-phase conditions regardless of regenerated voltages

Specifications

Supply Watts:5W

Frequency:50* or 60 Hz

Contact Rating:DPDT, pilot duty 480 VA @ 240 VAC General-purpose 10A @ 240 VAC

Transient Protection:IEC 1000-4-5

Line Voltage Monitored:190-480 VAC, adjustable

Low Voltage Trip:90% of setpoint

Low Voltage Reset:93% of setpoint

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:4 seconds

Trip Delay Time Low Voltage:4 seconds

Trip Delay Time Phase Fault:2 seconds

Trip Delay Time Unbalance:2 seconds

Voltage Unbalance Reset:4.5%

Voltage Unbalance Trip:6%

Operating Temperature:-40° to 158°F (-40° to 70°C)

Dimensions:5.25"W x 2.9"H x 2.92"D (13.3 x 7.4 x 7.4 cm)

Weight:0.875 lb (0.396 kg)

Approvals:UL and cUL listed, File #E68520

Warranty:5 years

Certifications

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