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Marsh Bellofram Diversified Electronics Division AC 2020 Series HVAC 3-Phase Compressor Protector

Marsh Bellofram Diversified Electronics Division AC 2020 Series HVAC 3-Phase Compressor Protector

Product catalog summary

Overview: The AC 2020 compressor protector is designed to safeguard 3-phase compressors by providing multimode time delays, reset options, and memory capabilities to indicate the last fault condition using LEDs. This device not only protects compressors under adverse electrical conditions but also helps identify fault types.

Specifications:

Control Voltage: 24 or 120 VAC, ±10%, 50/60 Hz
Trip Points: Under Voltage at -10% of setting, Over Voltage at +10% of setting, with a 5% hysteresis of nominal setting
Response Times: Pick-Up in Auto Mode adjustable from 0.05 to 5 minutes, Delay-On-Make fixed at 3 minutes, Drop-Out for Over/Under Voltage and Phase Loss approximately 2 seconds
Power Required: Less than 5 VA
Maximum Voltage: 550 VAC
Phase Sequence: ABC (will not operate on CBA sequence)
Output Rating: 278 VA Inductive; 10 Amps Resistive at 240 VAC
Configuration: Control SPST-N.O., Auxiliary SPDT
Mode Selections: Automatic, Manual, Delay-On-Break
Reset Switch: Options with or without memory, Auto Reset, Manual Reset
Transient Withstand: 1500 V at 8x20 microseconds
Temperature Rating: Operate from -4° to 131°F (-20° to +55°C), Storage from -40° to 185°F (-40° to +85°C)
Enclosure: Style “E” Lexan® Surface Mounted
Terminations: 12 #8-32 Screw Terminals
Weight: 6 oz.

Operating Voltage: Auto ranges for 240 VAC (190-270 VAC, adjustable, 50/60 Hz) and 480 VAC (380-540 VAC, adjustable, 50/60 Hz).

Ordering Information: Model Number AC-2020, described as a 3-Phase Compressor Protector with features including automatic voltage ranging, universal control voltage, condition/fault indicators, automatic/manual reset, last fault memory, delay-on-make, delay-on-break, auxiliary contacts, and easy installation.

Protection Against: The device protects against phase loss, under voltage, over voltage, phase reversal, and short cycling.

Catalog excerpts

Marsh Bellofram Diversified Electronics Division AC 2020 Series HVAC 3-Phase Compressor Protector-1

800.727.5646 atcdiversified.com Diversified Electronics AC Series 265 3- Ph a s e Comp r e s s o r P r o t e c t or The AC 2020 compressor protector provides multimode time delays, reset selections and a memory capability which indicates using LED’s, the last fault condition. This offers not only protection for the compressor in adverse electrical conditions but also a method to readily determine the type of fault occurrence. HVAC Controls // AC Series \\\SPECIFICATIONS CONTROL VOLTAGE 24 or 120 VAC, ±10%, 50/60 Hz TRIP POINTS Under Voltage -10% of Setting Over Voltage +10% of Setting Hysteresis 5% of Nominal Setting RESPONSE TIMES Pick-Up Auto Mode: 0.05 to 5 Min. (Adj) Delay-On-Make Delay Mode: 3 Min. (Fixed) Delay-On-Break Drop-Out Over/Under Voltage, Phase Loss: 2 SEC (Approximately) POWER REQUIRED <5 VA MAXIMUM VOLTAGE 550 VAC PHASE SEQUENCE ABC (Will Not Operate On CBA Sequence) OUTPUT RATING 278 VA Inductive; 10 Amps Resistive @ 240 VAC CONFIGURATION Control SPST-N.O. Auxiliary SPDT MODE SELECTIONS Automatic; Manual; Delay-On-Break RESET SWITCH With Memory, Without Memory, Auto Reset, Manual Reset TRANSIENT WITHSTAND 1500 V @ 8X 20 Microseconds TEMPERATURE RATING Operate -4° to 131°F (-20° to +55°C) Storage -40° to 185°F (-40° to +85°C) ENCLOSURE Style “E” Lexan® Surface Mounted TERMINATIONS (12) #8-32 Screw Terminals WEIGHT 6 oz. \\\OPERATING VOLTAGE Auto Ranges 240 VAC 190-270 VAC, Adj., 50/60 Hz 480 VAC 380-540 VAC, Adj., 50/60 Hz \\\ORDERING INFORMATION MODEL NUMBER DESCRIPTION AC-2020 3-Phase Compressor Protector • Automatic Voltage Ranging • Universal Control Voltage • Condition/Fault Indicators • Automatic/Manual Reset • Last Fault Memory • Delay-On-Make • Delay-On-Break • Auxiliary Contacts • Easy Installation PROTECTS AGAINST: • Phase Loss • Under Voltage • Over Voltage • Phase Reversal • Short Cycling

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