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Product Featuresarrow_drop_down
- The model 21 is a microcontroller based universal 3-phase monitor for protecting 3-phase motors from abnormal power conditions
- It can detect under voltage, over voltage, voltage unbalance, reverse phase and single phasing even when regenerated voltage is present
- The model 21 includes adjustable trip and restart delays to prevent nuisance tripping during power fluctuations and short cycling in compressor applications
- The LED status indicators and adjustment pots for Voltage Adjustment, % Unbalance, Restart Delay and Trip Delay are mounted on the front of the unit for easy access
- The model 21 does not require a neutral connection and can be used on either Wye or Delta systems
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Specificationsarrow_drop_down
- Application: Phase Loss, Phase Reversal, Over/Under Voltage and Voltage Unbalance Applications
- Contact Configuration: SPDT
- Country of Origin: US
- Dimensions: 3.53 in L x 2.45 in W x 1.77 in D
- Display Type: LEd
- Frequency Rating: 50/60 Hz
- Mfg Standards/Approvals: cULus Recognized
- Mounting Type: Socket
- Number of Pins: 8
- Series: 21 Series
- Type: 3-Phase Automatic Reset
- Voltage Rating: 190 to 480 VAC
- Warranty: 5 yr
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