aci A/CTE2-50, A/CTE2-150, A/SCTE2-150, A/SCTE2-250, A/SCTE2-50 General Information Manual

VOLTAGE OUTPUT CURRENT
SENSOR SERIES

Installation & Operation Instructions

Phone: [phone]

Website: workaci.com

PRECAUTIONS

• This product is not intended to be used for
Life or Safety applications.

FIGURE 1: DIMENSIONS

Solid-Core

2.36” (59.94mm)

• This product is not intended for use in any
hazardous or classified locations.

• The A/CTE2, A/CTV2, A/SCTE2 and A/SCTV2
Series Current Sensors must be used on

2.77”
(70.45mm)

Insulated Conductors Only.

HIGH VOLTAGE

• Disconnect and lock out all power sources
before installation as severe injury or death
may result from electrical shock due to
contact with high voltage wires.

GENERAL INFORMATION

The Voltage Output Analog Current Sensors are designed
for use in any AC current monitoring application in which

1.03”
(26.16mm)

Split-Core

2.55” (64.69mm)

2.87” (72.80mm)

3.35” (84.99mm)

you are looking to monitor a particular piece of
equipment for proper operation. All voltage output
current sensors use an “Average” current measuring
method and should be used in applications where a pure

2.77”
(70.35mm)

Sinusoidal AC waveform that has very little or no
distortion/noise on the conductor being monitored.
Applications may include monitoring a resistive type load
such as an incandescent light bulb or heating element as
well as any single speed linear load. Voltage Output
current sensors are available in both solid and split-core

3.24” (82.23mm)

2.87” (72.77mm)

1.10” (28.02mm)

versions which also includes a Patented 35 mm Din Rail
mounting foot for easy installation in panel mount
applications. The solid-core versions are a great choice for
new installations or OEM applications in which cost
sensitivity, lower trip points and environmental issues like
dust and moisture may be of concern. The split-core version of the current sensors work great in retrot applications and
for use on service technicians vehicles since one or two parts will work in most applications and can be easily installed
without disconnecting any wires. For best results, the voltage output current sensors should not be used in applications
with switching power supplies or variable speed drives due to the limited operating frequency range. In applications
where variable speed drives or waveforms include distortion/noise, ACI recommends the use of the A/CTA2-RMS or
A/SCTA2-RMS Series sensors where you need to supply 24 VDC power to the current sensors with a 4-20 mA signal. A
249 Ohm or 499 Ohm 1 Watt resistor can be used to convert the 4-20 mA signal into a useable 1-5 or 2-10 VDC output
signal at your building management system or PLC.

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Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com

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INSTALLATION

Make sure that all installations are in compliance with
all national and local electrical codes. Only qualied
individuals that are familiar with codes, standards, and

FIGURE 2: OPENING A/SCTV2-50
SERIES

A/SCTV2-50

proper safety procedures for high-voltage installations
should attempt installation. The current sensor will not
require external power, since the power for the current
sensor is induced from the conductor being monitored.

The current sensor may be mounted in any position
using the two #8 x ¾” Tek screws and the mounting
holes in the base, or snapped directly on to the 35mm
DIN rail (See Figure 3). Leave a minimum distance of 1”
(3 cm) between the current sensor and any other
magnetic devices such as contactors and transformers.

A/SCTV2-50

Latch Operation for A/SCTE2 and A/SCTV2 Series

Press down on the side tab and swing the top of the
unit up to open the split core current sensor as shown
in Figure 2. Press down rmly on the cover to close the
current sensor. An audible “click” will be heard as the
tab slides over the tongue on the base.

CAUTION: Mating surfaces of the magnetic core are
exposed when the sensor is open. Electrical contact
grease, present on the cores to prevent corrosion, can
capture grit and dirt if care is not exercised. Operation
can be impaired if anything prevents good contact between pole pieces. Visually check the mating parts
of the core before closing the current sensor.

Current Sensor Setup

The amperage range selected represents the maximum current that can be applied to the conductor being
monitored, Do not exceed! All current sensors with selectable ranges will have the range selection jumper
factory set on the high range. For models with eld selectable amperage ranges, select the correct
amperage range using the range selection jumper.

Note: An extra jumper shunt is included. It can be discarded if not needed.

Note: In applications where high vibrations are encountered, ACI recommends to use the jumper shunt

without tab. A pliers can help with jumper shunt installation onto the pins.

FIGURE 3: DIN RAIL INSTALLATION

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Automation Components, Inc.

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Phone: [phone] | Website: workaci.com

Version: 8.0

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FIGURE 4: WIRING

(-) Signal Common

+ 0-5 or 0-10 VDC
Analog Input

GND (Shield)

COM

0-5 VDC

SHIELDED CABLE

PLC, DDC or DATA
Acquiation System

WIRING INSTRUCTIONS

ACI recommends the use of a two conductor 16 to 22 AWG shielded cable, copper wire only, for all Analog
current sensor installations. A maximum wire length of less than 30 meters (98.4 feet) should be used
between the current sensors and the Building Management System or controller. All wiring must comply
with all local and National Electric Codes.

Note: When using a shielded cable, be sure to connect only (1) end of the shield to ground at the controller.
Connecting both ends of the shield to ground may cause a ground loop.

When removing the shield from the sensor end, make sure to properly trim the shield to prevent any chance
of shorting. The current sensor terminals are polarity sensitive and represent a linear 0 to 5 or 0 to 10 VDC
output signal. Tighten the screws at the terminal block connections to the recommended torque of 0.5 to 0.6
Nm (4.43 to 5.31 in-lbs.). The aperture (hole) size of the current sensor is 0.75” (1.90 cm).

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562

Phone: [phone] | Website: workaci.com

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TROUBLESHOOTING

PROBLEM

No reading

Erratic readings

Inaccurate readings

Current Sensor is operating at a

low-level current or failing to operate

within the accuracy specifications.

STANDARD ORDERING

Model #

A/CTE2-50

A/CTE2-150

A/SCTE2-50

A/SCTE2-150

A/SCTE2-250

A/CTV2-50

A/CTV2-150

A/SCTV2-50

A/SCTV2-150

A/SCTV2-250

Item #

142389

142388

142385

142384

142383

142387

142386

142382

142381

142380

Selectable Ranges

0 to 10/20/50A

0 to 50/100/150A

0 to 10/20/50A

0 to 50/100/150A

0 to 100/200/250A

0 to 10/20/50A

0 to 50/100/150A

0 to 10/20/50A

0 to 50/100/150A

0 to 100/200/250A

SOLUTION(S)

- Verify that there is current owing through the conductor being monitored with a

clamp-on current probe. The power for the current sensor is induced from the conductor

being monitored.

- Check the polarity of the circuit.

- Verify that the terminals are screwed down, wires are rmly in place.

- Disconnect the wires from the current sensor output. Measure the voltage across the

current sensor output with a Voltmeter to verify that the sensor is working properly.

- Verify that the wires are terminated properly.

- In areas of high RF interference, shielded cable may be necessary to stabilize signal.

- If you suspect that the current sensor is not reading within the accuracy specications,

please contact the factory for assistance.

-Visually check the mating parts of the core to ensure there is no debris between the split

contacts. See Figure 2.

-Remove all debris or dust manually and close the current sensor.

-Continue to retest the sensor in your application.

Measurement

Average

Average

Average

Average

Average

Average

Average

Average

Average

Average

AC Waveform

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Pure Sinusoidal

Solid-Core

•

•

•

•

Split-Core

•

•

•

•

•

•

Output Signal

0 to 5 VDC

0 to 5 VDC

0 to 5 VDC

0 to 5 VDC

0 to 5 VDC

0 to 10 VDC

0 to 10 VDC

0 to 10 VDC

0 to 10 VDC

0 to 10 VDC

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562

Phone: [phone] | Website: workaci.com

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PRODUCT SPECIFICATIONS

SENSOR NON-SPECIFIC INFORMATION

Monitored Current Type:

Maximum AC Voltage:

Isolation Voltage:

Operating Frequency Range:

Core Style:

Supply Voltage:

Sensor Amperage Range:

Output Signal | Number of Wires:

Accuracy:

Response Time:

Aperture Size:

Din Rail Size:

Operating Temperature Range:

Operating Humidity Range:

Recommended Storage Temperature |

RH Range:

Enclosure Material | Flammability

Rating:

Wiring Connections:

Wire Recommendations:

Wire Size:

Terminal Block Torque Rating:

Minimum Mounting Distance:

Note:

All current output sensors are calibrated at an ambient room temperature of 71ºF (21.5ºC)

AC Current

600 VAC

2200 VAC

50 to 600 Hz

Solid-Core and Split-Core Versions available (See Ordering Grid)

Induced from the Monitored Conductor (Insulated Conductors only)

See Ordering Grid (Field Selectable)

A/CTE2 & A/SCTE2 Series: 0 to 5 VDC | A/CTV2 & A/SCTV2 Series: 0 to 10 VDC | 2-Wires

A/CTE2 & A/SCTE2 Series: (0-10A Range Only): +/- 1% from 5-100% of Selected Range

A/CTE2 & A/SCTE2 Series: (All Other Ranges): +/- 1% from 2-100% of Selected Range

A/CTV2: +/- 1% from 5-100% of Selected Range

A/SCTV2 Series: (0 to 10A Range Only): +/- 2% from 5 to 100% of Selected Range

A/SCTV2 Series: (All Other Ranges): +/- 1% from 5 to 100% of Selected Range

< 300 mS (Rise and Fall Times)

0.75” (19.05 mm)

35 mm (U.S. Patent No. 7,416,421)

5 to 104ºF (-15 to 40ºC)

0 to 95%, non-condensing

41 to 95ºF (5 to 35ºC) | 40% to 85% RH, non-condensing

PC/ABS (Polycarbonate/ABS Blend) | UL94-V0

2 Position, Screw Terminal Block (Polarity Sensitive)

2 Conductor (Shielded Cable)

18 to 24 AWG (0.823 mm to 0.205 mm) Copper Wires only

4.43 to 5.31 in-lbs. (0.5 to 0.6 Nm)

1” (2.6 cm) between current sensor & other magnetic devices (Relays, Contactors,

Transformers)

WARRANTY

The ACI Voltage Output Sensors are covered by ACI’s Five (5) Year Limited Warranty, which is located in the front of
ACI’S SENSORS & TRANSMITTERS CATALOG or can be found on ACI’s website: www.workaci.com.

W.E.E.E. DIRECTIVE

At the end of their useful life the packaging and product should be disposed of via a suitable recycling
centre. Do not dispose of with household waste. Do not burn.

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Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com

Version: 8.0

I0000790

NOTES

Page 6

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com

Version: 8.0

I0000790

NOTES

Page 7

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com

Version: 8.0

I0000790

Automation Components, Inc.

2305 Pleasant View Road
Middleton, WI 53562

Phone: [phone]
Website: workaci.com

Page 8

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com

Version: 8.0

I0000790