ACI-Automation Components A/SCTE-50, A/SCTE-250, A/SCTV-50, A/SCTV-250 Instruction Sheet
Installation and Operation Instructions
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Part # A/SCTE-50, A/SCTE-250,
A/SCTV-50, A/SCTV-250
Safety
This product is not intended to be used for Life or Safety applications.
This product is not intended for use in any hazardous or classified locations.
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.
Installation
Make sure that all installations are in compliance with all national and local electrical codes. Only qualified individuals that are
familiar with codes, standards, and 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 A/SCTE & A/SCTV Series Analog Current Sensors should be used on Insulated Conductors Only! The current sensors
may be mounted in any position using the (2) #8 x 3/4” Tek screws and the mounting holes in the base or snapped directly onto the
35mm DIN rail (See Figures 1 & 2 below). Leave a minimum distance of 1” (3 cm) between the current
sensor and any other magnetic devices such as contactors and transformers.
Please Read Instructions Carefully Before Installation!
Figure 1: Sensor Placed on Rail Figure 2: Sensor Removed from Rail
Latch Operation:
Pressing down on the two (2) side tabs and swinging the cover open opens the split core current sensor as shown in Figure 3
below. Lifting up on the latch with a flat-tip screwdriver as shown in Figure 4 below can also open the unit. Press down firmly
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. Silicone grease, present on the cores to
prevent rust, may 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.
Figure 3: Opening Sensor by Hand Figure 4: Opening w/ Screwdriver
Page 1 of 3 I0000142
Version : 1.0
Wiring
Power: These current sensors DO NOT
need an external power source,
since the power is self-induced
from the monitored load
or conductor.
Connections: Shielded, twisted pair cable is
recommended for these connections.
Note: Ground shield at control
system end only!
GND (Shield)
PLC, DDC, or Data
Acquisition System
(-) Signal Common
+ 0-5 or 0-10 VDC
+
_
Analog Input
ACI Model #
Output
Range
Jumper *
Max. Sensing
Current Voltage
Max. Continuous
Current
Max. Current for
6 seconds
A/SCTE-50
0 to 5 VDC
0-10 Amps
0-20 Amps
0-50 Amps
Low
Middle
High
600 VAC
100 Amps
150 Amps
200 Amps
125 Amps
225 Amps
300 Amps
A/SCTE-250
0 to 5 VDC
0-100 Amps
0-200 Amps
0-250 Amps
Low
Middle
High
600 VAC
200 Amps
360 Amps
400 Amps
250 Amps
450 Amps
500 Amps
A/SCTV-50
0 to 10 VDC
0-10 Amps
0-20 Amps
0-50 Amps
Low
Middle
High
600 VAC
60 Amps
100 Amps
160 Amps
80 Amps
200 Amps
300 Amps
A/SCTV-250
0 to 10 VDC
0-100 Amps
0-200 Amps
0-250 Amps
Low
Middle
High
600 VAC
160 Amps
320 Amps
400 Amps
200 Amps
400 Amps
500 Amps
ACI recommends the use of a 2 conductor 16 to 22 AWG shielded cable, copper wire only for all Analog current sensor
installations. A maximum wire length of 30 meters (98.4 feet) should be used between the A/SCTE and A/ SCTV Series current
sensors and the Building Management System or controller. 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 so as to prevent any chance of shorting. The
current sensors terminals are polarity sensitive and represent a linear 0 to 5 or 0 to 10 VDC output signal. The recommended
torque to be used on the terminal block connections is 0.67 Nm or 5.93 in-lbs. The aperture (hole) size of the current sensor is
0.75” (1.90 cm) and will accept a maximum cable diameter of 350 MCM’s.
Operating Specifications
*Note: All current sensors are shipped from the factory with the jumper set in the high range.
Version : 1.0
Page 2 of 3 I0000142
Wiring Example
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