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Marsh Bellofram Diversified Electronics Division AC-410 Series HVAC Phase Sequence & Loss Monitor

Marsh Bellofram Diversified Electronics Division AC-410 Series HVAC Phase Sequence & Loss Monitor

Product catalog summary

Overview: The AC-410 Series are plug-in Phase Sequence and Loss Monitors designed to protect three-phase refrigeration equipment from adverse line conditions such as phase loss, under voltage, and phase reversal. These monitors ensure the equipment operates under optimal conditions by detecting and responding to specific electrical issues.

Key Features:

Phase Loss (Single Phasing): Triggered when any phase drops to 83% or less of the adjustment setting.
Under Voltage (Brown Outs): Activated when all three phase voltages drop to 90% or less of the adjustment setting.
Phase Reversal (Improper Sequence): Occurs when the incorrect sequence is applied to the equipment.

Operation: Upon detection of any adverse condition, the internal control relay deactivates, initiating a 3-minute delay-on-break time delay to lock out the compressor, allowing head pressure to equalize. The relay re-energizes once conditions normalize and external control voltage is present. Indicators show line condition status: green for normal and red during delay.

Specifications:

Drop Out Levels: 1 Ø Low at 83% and 3 Ø Low at 90% of adjustment setting.
Phase Sequence: Operates on ABC sequence, will not operate on CBA.
Time Delays: Operate delay of 3 minutes ±20%, release delay of 100 milliseconds.
Output Rating: SPDT, 10 Amps @ 240 VAC, with different inductive VA ratings for models AC-410, AC-411, and AC-412.
Temperature Rating: Operating range from -4° to 131°F (-20° to +55°C), storage range from -40° to 185°F (-40° to +85°C).
Enclosure: Style “A”.
Weight: 7 oz.

Ordering Information: Consult the factory for available models.

Catalog excerpts

Marsh Bellofram Diversified Electronics Division AC-410 Series HVAC Phase Sequence & Loss Monitor-1

800.727.5646 atcdiversified.com Diversified Electronics AC-410 Series 271 Pha s e S e qu e nc e & L o s s M o n i t or The AC-410 Series are plug in Phase Sequence and Loss Monitors that protect 3 phase refrigeration equipment from adverse line conditions such as: PHASE LOSS (SINGLE PHASING): When any one phase drops to 83% or less of the adjustment setting. UNDER VOLTAGE (BROWN OUTS): When all three phase voltages drop to 90% or less of the adjustment setting. PHASE REVERSAL (IMPROPER SEQUENCE): When the wrong sequence is applied to the equipment. When any of the mentioned occurs, the internal control relay drops out and a 3 minute delay-on-break time delay begins. This delay is used to lock out the compressor, allowing time for head pressure to equalize. When the delay has completed, the relay will re-energize provided all conditions are corrected and the external control voltage is present on terminals six (6) and seven (7). A green indicator glows when all line conditions are normal and a red indicator shows when the timer is in its delay. HVAC Controls // AC-410 Series \\\ORDERING INFORMATION Consult Factory for available Models. STYLE A \\\WIRING \\\SPECIFICATIONS DROP OUT 1 Ø Low 83% of Adjustment Setting 3 Ø Low 90% of Adjustment Setting PHASE SEQUENCE ABC (Will Not Operate CBA) TIME DELAYS Operate 3 Minutes ±20% Release 100 Milliseconds OUTPUT RATING AC-410 SPDT, 10 Amps @ 240 VAC, Resistive; 470 VA, Inductive. AC-411 & 412 SPDT, 10 Amps @ 240 VAC, Resistive; 180 VA, Inductive TEMPERATURE RATING Operate -4° to 131°F (-20° to +55°C) Storage -40° to 185°F (-40° to +85°C) ENCLOSURE Style “A” WEIGHT 7 oz. \\\OPERATION

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