Diversified Electronics Current Monitors
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CBA Series
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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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