3-Phase Monitor with Adjustable Trip & Restart Delays

20AB-L/SG

The 20AB-L 3-Phase Monitor provides essential protection for industrial equipment. This unit features adjustable trip and restart delays, allowing precise system integration. It monitors critical conditions including phase loss, phase reversal, over/under voltage, and voltage unbalance, ensuring operational continuity. With an operating voltage range of 95-120 VAC and a power consumption of 3.7W at 120V, it offers efficient performance. The adjustable voltage unbalance trip from 2-8% conforms to NEMA standards, enhancing reliability. Its auto-reset functionality minimizes downtime, while output contacts rated at 7.5A at 240VAC resistive provide robust control. The unit's compact design, measuring 2.30" x 3.18" x 3.91", facilitates versatile DIN rail or surface mounting. This monitor is engineered for consistent performance across a -20¬∞ to +140¬∞ F operating temperature range, supporting diverse industrial applications.

Unv 3Ph Monitor

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20ab-l-sg

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Specifications

Reset Type	Auto Reset
Operating Voltage	95-120 VAC
Power Consumption	3.7W at 120V
Auto Ranges	No
Monitored Conditions	Phase Loss, Phase Reversal, Over/Under Voltage and Voltage Unbalance
Frequency	50/60Hz
Type of Measurement	RMS
Under Voltage Trip	90% ±1% (% of setpoint)
Under Voltage Reset	93% ±1% (% of setpoint)
Over Voltage Trip	110% ±1% (% of setpoint)
Over Voltage Reset	107% ±1% (% of setpoint)
Voltage Unbalance Trip	2-8%, adjustable (conforms to NEMA)
Voltage Unbalance Reset	Trip setting minus 0.7%
Trip Delay Time (Over, Under, & Unbalanced)	1-30 sec., adjustable
Trip Delay Time (Single-Phasing Faults)	1 sec., fixed
Trip Delay Time (Unbalance > 15%)	1 sec., fixed
Restart Delay	1-500 sec., adjustable
Manual Reset Input	5V open circuit/500µA short circuit
Output Contacts	1x N.C., 1x N.O. 7.5A at 240VAC resistive
Operating Temperature	-20° to +140° F
Humidity Tolerance	0-97% w/o condensation
Terminal Torque	3.5 in. lbs. maximum
Wire Type	Stranded or solid 14-26 AWG, 1/terminal
Enclosure Material	Noryl plastic
Mounting	DIN Rail or Surface Mount
Additional Options	/SG = Silver with Gold Flash Contacts
Warranty	5-year Unconditional Warranty

FAQs

What specific conditions does the 20AB-L monitor for industrial systems?

The 20AB-L monitors for phase loss, phase reversal, over/under voltage, and voltage unbalance. It features an adjustable voltage unbalance trip from 2-8%, conforming to NEMA standards, and an under voltage trip at 90% ±1% of setpoint.

What are the adjustable delay parameters for the 20AB-L monitor?

The 20AB-L offers an adjustable trip delay time for over, under, and unbalanced conditions from 1-30 seconds. Additionally, it includes an adjustable restart delay ranging from 1-500 seconds.

What are the electrical specifications for the 20AB-L's operation and output?

The 20AB-L operates at 95-120 VAC with a 50/60Hz frequency, consuming 3.7W at 120V. Its output contacts are rated for 1x N.C. and 1x N.O. at 7.5A at 240VAC resistive.