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Marsh Bellofram Diversified Electronics Division CDU Series Under Current Monitor

Marsh Bellofram Diversified Electronics Division CDU Series Under Current Monitor

Product catalog summary

Overview: The CDU Series is designed to detect undercurrent conditions. It features an internal relay that energizes when the monitored current exceeds a preset trip point and de-energizes when the current falls below this point for a duration longer than the adjustable delay. This delay helps prevent nuisance tripping due to momentary line dips. The relay re-energizes when the current rises 5% above the drop-out trip point for more than 0.2 seconds and includes an automatic reset feature.

Model Specifications:

Model Number: CDU 120 A L E
Control Voltage: 120 Volts AC
Adjustment Options: 0.2 to 1 amps, 0.5 to 2.5 amps, 1.0 to 5.0 amps, 2.0 to 10 amps, 4.0 to 20 amps

Operation and Specifications:

Control Voltage: 120 VAC, 50/60 Hz
Trip Points: Pick-up is 5% above Drop-out
Output: SPDT, 10 Amps @ 240 VAC Resistive
Hysteresis: 5%
Response Time: Operate in 0.2 seconds, Release adjustable from 0.2 to 10 seconds
Indicators: Green light for trip and relay status
Reset: Automatic
Temperature Rating: Operate between 32° to 131°F (0° to +55°C), Storage between -49° to 185°F (-45° to +85°C)
Contact Arrangement: Two Form C Contacts for Over/Under conditions
Enclosure: Lexan Surface Mounted with #8-32 Screw Terminals
Weight: 17 oz.

Catalog excerpts

Marsh Bellofram Diversified Electronics Division CDU Series Under Current Monitor-1

CDU Series Diversified Electronics atcdiversified.com 800.727.5646 236 Current Monitors // CDU Series The CDU Series is used to detect Under Current conditions. The internal relay is energized (Pick-up) when the monitored current is above the preset trip point. The relay de-energizes (Drop-out) when the current falls below the trip point for longer than the adjustable delay. The delay is incorporated to prevent nuisance tripping caused by momentary line dips. The relay re-energizes when the current rises 5% above the Drop-out trip point for longer than 0.2 seconds. The relay has the automatic reset feature. D C U n d e r C u r r e n t Mo n i t o r /Rela ys MODEL NUMBER >>>>>> CDU 120 A L E Control Voltage 120 A L 1 120 Volts Type of Voltage AC Adjustment Lockshaft Features 0.2 to 1 amps. adj. 0.5 to 2.5 amps. adj. 2.5 1.0 to 5.0 amps, adj. 5 2.0 to 10 amps, adj. 10 4.0 to 20 amps. adj. 20 \\\OPERATION \\\SPECIFICATIONS CONTROL VOLTAGE 120 VAC, 50/60 Hz TRIP POINTS Pick-up 5% above Drop-out Drop-out See order information OUTPUT SPDT, 10 Amps @ 240 VAC Resistive HYSTERESIS 5% RESPONSE TIME Operate 0.2 SEC Release 0.2 to 10 SEC, Adjustable INDICATORS Trip (Green) Glows When Current is Above Preset Current Trip Relay (Green) Glows when Relay is energized RESET Automatic TEMPERATURE RATING Operate 32° to 131°F (0° to +55°C) Storage -49° to 185°F (-45° to +85°C) CONTACT ARRANGEMENT (2) Form C Contacts. One Each for Over/Under ENCLOSURE Lexan Surface Mounted; #8-32 Screw Terminals WEIGHT 17 oz. \\\WIRING \\\DIMENSIONS (INCHES)

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