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Diversified Electronics Current Monitors
 

CBA Series AC Over and Under Current Band Monitor/Relays
CDD Series Universal DC Current Monitor/Relays
CDO Series DC Over Current Monitor/Relays
CDU Series DC Under Current Monitor/Relays
CLB Series Three Phase Current Unbalance and Over Current Monitor/Relays
CMB Series AC Go/No-Go Current Monitor/Relays
CMD Series Universal AC Current Monitor/Relays
CMG Series AC Self Powered Go/No-Go Current Monitor/Relays
CMG-0101 Series AC Self Powered Go/No-Go Current Monitor/Solid State
CMI Series AC Over Current Monitor/Relays For Motor Jam Ups
CML Series AC Over Current Monitor/Relays with Manual Reset
CMO Series AC Over Current Monitor/Relays
CMU Series AC Under Current Monitor/Relays
KCL-5M AC Current Monitoring
CT Series Current Transformers
 

CBA Series
 


 

The CBA Series is used to detect under and over current conditions. When the monitored current is within the normal current band, both internal relays are de-energized (drop out). When the current rises above the over current setting for longer than 1.0 second, the over current relay energizes (pick up). If the current falls below the under current setting for longer than 1.0 second, the under current relay energizes. When the monitored current returns to normal, the relays will automatically reset. The over and under current trip points are independently adjustable.

An External CT may be used to extend the range of the Current Monitor.

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CDD Series
 


 

The CDD series may be used as an Over Current Monitor or an Under Current Monitor. The CDD has adjustable Delay-on-Operate and adjustable Delay-on-Release time delays. When the current exceeds the preset current trip point for longer than the Delay-on-Operate time delay, the internal relay will energize (pick up). When the current drops below the preset current trip point for longer than the Delay-on-Release time delay, the internal relay will de-energize (drop out). When used as an Over Current Monitor the Delay-on-Operate time delay is used to override inrush periods. When used as an Under Current Monitor, the Delay-on-Release timer is used to override a temporary under current condition. Enclosure Dimensions

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CDO Series
 


 

The CDO Series is used to detect over current conditions. The internal relay energizes (pick up) when the monitored current exceeds the preset trip point for longer than the adjustable time delay. The delay is incorporated to prevent nuisance tripping caused by inrush currents. The CDO has an automatic reset feature. The internal relay de-energizes (drop out) when the current drops 5% below the preset trip for longer than 0.2 seconds.

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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.

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CLB Series
 


 

The CLB Series is designed to protect three phase equipment against *Current Unbalance and Over Current conditions.

The control voltage is continuously applied to supply the sensing circuitry and the internal relay.

When the current of any phase approximately 20% above the maximum operating current, the inrush delay begins. This delay disables the over current sensors while high inrush currents are present. Any time the currents are outside the preset limits after completion of the inrush delay, the internal relay will de-energize (drop out).

A 2% differential (hysteresis) between pick up and drop out is incorporated to prevent chattering when operated in the automatic reset mode and the current is at the trip point.

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CMB Series


 

The CMB Series relay is used to detect the presence of AC current. When the monitored current exceeds the trip point for longer than 30 milliseconds, the internal relay energizes. When the monitored current drops below the trip point for longer than 0.5 seconds, the internal relay de-energizes. The Delay-on-Release is incorporated to prevent nuisance tripping caused by momentary dips in the load line.

An External CT may be used to extend the range of the Current Monitor.

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CMD Series
 


 

The CMD Series may be used as an Over Current Monitor or an Under Current Monitor. The CMD has adjustable Delay-on-Operate and adjustable Delay-on-Release time delays. When the current exceeds the preset current trip point for longer than the Delay-on-Operate time delay, the internal relay will energize (pick up). When the current drops below the preset current trip point for longer than the Delay-on-Release time delay, the internal relay will de-energize (drop out). When used as an over current monitor the Delay-on- Operate time delay is used to override inrush periods. When used as an under current monitor, the Delay-on-Release timer is used to override a temporary under current condition.

An External CT may be used to extend the range of the Current Monitor.

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CMG Series
 


 

The CMG Series is a self powered Current Monitor/ Relay that is used to detect the presence of AC current. When the monitored current exceeds the trip point for longer than 400 mSec., the internal relay energizes (pick up). When the monitored current drops below the trip point for longer than 50 mSec., the internal relay de-energizes (drop out). No physical connection is required as the line to be monitored is magnetically coupled by passing the conductor through the protruding Current Transformer of the monitor. No external supply is needed to power the monitor.

The current trip point specified is with one turn through the transformer. Each time the number of turns through the transformer doubles, the trip point effectively halves. Example: CMG-0100-20 will trip at 20 amps with one turn passing through the transformer. By placing two turns through the transformer, the relay will trip at 10 amps. Likewise, four turns will cause the relay to trip at 5 amps.

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CMG-0101 Series
 


 

The CMG-0101 Series is a solid state self powered Current Monitor/Solid State that is used to detect the presence of AC current. When the monitored current exceeds the trip point for longer than 400 mSec., the output energizes (pick up). When the monitored current drops below the trip point for longer than 400 mSec., the output de-energizes (drop out). No physical connection is required as the line to be monitored is magnetically coupled by passing the conductor through the protruding Current Transformer of the monitor. No external supply is needed to power the monitor.

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CMI Series
 


 

The CMI Series Over Current Monitor Relay operates in the fail-safe mode as the relay is energized (pickup) when the monitored AC current is normal. The relay de-energizes (drop out) when the monitored current rises above the preset trip point or the control voltage is removed. When current is initially applied, a time delay begins. This inhibits the over current sensors while high inrush currents are present. The delay is field adjustable and is set so the delay period is slightly longer than the inrush time of the motor. If the monitored current is above the preset trip point when the delay elapses, the relay de-energizes. (Figure 1) If the current drops to the normal run current of the motor prior to the completion of the delay period, the relay remains energized until the current rises above the trip point, which indicates an abnormal condition. At that time the relay de-energizes and remains locked-out until the reset button is pressed or the control voltage is interrupted, and reapplied. (Figure 2) A typical application is for conveyor jam up detection.

An External CT may be used to extend the range of the Current Monitor.

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CML Series
 


 

The CML Series is used to detect over current conditions. The internal relay energizes (pick up) when the monitored current exceeds the preset trip point for longer than the adjustable time delay period. The adjustable delay is incorporated to prevent nuisance tripping caused by motor inrush currents. The CML has the manual reset feature. The internal relay de-ener-gizes (drop out) when the reset button is pressed. If the current is below the trip point when the button is released, the relay will remain de-energized. If the current is above the trip point, the relay will re-energize. An External CT may be used to extend the range of the

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CMO Series

 


 

The CMO Series is used to detect over current conditions. The internal relay energizes (pick up) when the monitored current exceeds the preset trip point for longer than the adjustable time delay. The delay is incorporated to prevent nuisance tripping caused by motor inrush currents. The CMO has an automatic reset feature. The internal relay de-energizes (drop out) when the current drops 5% below the preset trip for longer than 0.2 seconds. An External CT may be used to extend the range of the Current Monitor.

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CMU Series

 


 

The CMU 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 0.1 seconds. The relay has the automatic reset feature. An external CT may be used to extend the range of the Current Monitor.

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KCL-5M Series
 


 

ATC-Diversified's KCL-5M, AC current monitoring light indicates current flow to motors, heaters, or other current application devices by induction. Typical indicating lights signal only that the switch function has been performed and it has provided power to the light. It does not indicate that the device being powered is drawing current. The KCL-5M provides indication that the device being monitored is drawing current.

The cost of scrap, lost time, or damage to equipment resulting from a non-running motor or malfunctioning heater can be greatly reduced with the installation of a ATC KCL-5M. Priced well below current meters, traditionally used to check flow to a load, the ATC KCL-5M installs without a wire splice and has a neon indicating lamp rated @ 15,000 hours. Installation requires a one (1") inch diameter panel hole, and the unit requires less than two (2") inches back panel space.

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CT Series
 


 

The CT Current Transformers are of the inserted primary type with the secondary toroidally wound over a core of oriented electrical steel. The windings are carefully insulated. The entire transformer is then dipped in PVC insulation compound which insures maximum protection against moisture, acids, alkaline, oils and abrasive particles. The securely fastened 24” 14 AWG leads are identified to the extent that the secondary current leaving the CT through the white lead is in phase with the primary current when the primary conductor enters the CT from the side identified by the black dot. To prevent shock and transformer damage, it is important that the secondary leads always form a continuous circuit when the current is flowing in the primary.

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