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Marsh Bellofram Diversified Electronics Division Current Monitors Overview

Marsh Bellofram Diversified Electronics Division Current Monitors Overview

Product catalog summary

Overview: ATC-Diversified Electronics offers a range of Current Monitors suitable for various monitoring applications. The CM Series (AC Current Monitor/Relays) uses an internal current transformer, while the CD Series (DC Current Monitor/Relays) employs a Hall-effect device. Both series activate an internal relay when a preset current threshold is reached, which can be used for instrumentation or alarm circuits. The current sensing range can be extended with external Current Transformers.

Specifications: The Current Monitors are available in different series, each with specific features such as overcurrent, undercurrent, three-phase unbalance, and self-powered options. They support control voltages of 24VDC, 24VAC, and 120VAC, with adjustable current ranges from 0.05 to 30 amps. Enclosure styles include plug-in and surface mount options, with both automatic and manual reset time delays.

Applications: Typical applications include sensing current demand levels, run time totalization, detecting conveyor load jams, heater element failures, dull bits or blades, runway lights, radio tower light failures, remote motor sensing, load loss, and broken fan belts or chains.

Feature Matrix: The document includes a feature matrix that outlines the capabilities of each Current Monitor series, highlighting their specific features and specifications.

Catalog excerpts

Marsh Bellofram Diversified Electronics Division Current Monitors Overview-1

Features Diversified Electronics atcdiversified.com 800.727.5646 232 Current Monitors // Features \\\CURRENT MONITORS ATC-Diversified Electronics has a Current Monitor available to fit almost any monitoring application. The operation of the CM Series, AC Current Monitor/Relays, is based on an internal current transformer magnetically coupling the solid state sensing circuitry to the line being monitored. The operation of the CD Series, DC Current Monitor/Relays, is based on an internal Hall-effect device with a magnetic concentrator coupling the solid state sensing circuitry to the line being monitored. When the monitored current reaches a preset threshold point, an internal relay switches. The heavy duty contacts are used for instrumentation or signaling alarm circuits. The current sensing range of the ATC-Diversified Electronics AC Current Monitor/Relays can be increased by the use of an external Current Transformer. With the use of external Current Transformers you can monitor the current on almost any application. The feature matrix below shows the Current Monitor Series available from ATC-Diversified Electronics and highlights their features and specifications. The following are some typical applications for ATC-Diversified Electronics Current Monitors: SENSING FEATURES CONTROL VOLTAGE ADJUSTABLE CURRENT RANGE ENCLOSURE RESET TIME DELAY UL RECOGNIZED UL RECOGNIZED FOR CANADA SERIES OVER CURRENT UNDER CURRENT THREE PHASE UNBALANCE SELF POWERED 24 VDC 24 VAC 120 VAC 0.25 (0.05 TO 0.25 AMPS) 1 (0.2 TO 1.0 AMPS) 5 (1.0 TO 5.0 AMPS) 10 (2.0 TO 10 AMPS) 20 (4.0 TO 20.0 AMPS) 30 (6.0 TO 30 AMPS) “A” STYLE PLUG-IN “D” STYLE SURFACE MOUNT “E” STYLE SURFACE MOUNT AUTOMATIC MANUAL FIXED (OPERATE) ADJUSTABLE (OPERATE) FIXED (RELEASE) ADJUSTABLE (RELEASE) CBA l l l l l l l l l l l l CDD l l l l l l l l l l l CDO l l l l l l l l l l CDU l l l l l l l l l l CLB l l l l l l l l l l CMB l l l 1-10 amps fixed l l l l l l CMD l l l l l l l l l l l l l l CMG l 20-36 amp fixed (0100 series only) l l l l l l CMI l l l l l l l l l l l l CML l l l l l l l l l l l l l l CMO l l l l l l l l l l l l l l CMU l l l l l l l l l l l l l l \\\TYPICAL APPLICATIONS • Sense current demand level • Run time totalizer • Detect conveyor load jam • Detect heater element failure • Detect the use of dull bits or blades • Detect runway lights and radio tower light failures • Remote motor sensing • Sense load loss • Detect broken fan belts or chains \\\FEATURE MATRIX

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