Split-Core Current
Transformers
Features
Split core for easy installation; ideal for retrofit
No exposed metal parts when assembled
0.333 VAC output at rated current
Safer to install and use than CTs with a current
secondary
UL and CE recognized, and RoHS compliant
Split-Core Current Transformers
Description
These split-core current transformers (CTs) from Continental
Control Systems offer an easy, safe, and inexpensive method
for monitoring electrical energy usage.
Ideal for retrofit applications, the split core makes it possible to
attach the CT without disturbing existing wiring. Just open the
CT, slip it over the wire, and snap the CT closed. Once
assembled, the CTs have no exposed metal parts.
The 0.333 VAC output of these CTs is low, making them much
more safe to install and use than CTs with current secondaries.
These CTs are also less expensive.
Part numbers with ACT in the middle (ACT series) are accurate
to ± 0.75% from 1% to 120% of rated primary current. They
also have exceptionally low phase angle error, which is
essential for accurate power and energy measurements. ACT
series CTs comply with the linearity and accuracy
requirements of IEEE/ANSI C57.13 for tenant submetering and
billing. These CTs swing open for one-handed operation.
Part numbers with CTS in the middle (CTS series) are accurate
to ± 1% from 10% to 130% of rated current. This level of
accuracy is suited to most energy monitoring applications.
Each CT has an internal precision burden resistor across the
secondary. Each CT includes 8 ft (2.4 m), twisted-pair, 22 AWG
leads.
See specifications and dimensions on the following pages.
Monitoring Energy
These split-core CTs are recommended for use with the
OptoEMU Sensor™ 3V energy monitoring unit.
The OptoEMU Sensor 3V is a simple appliance that monitors
the electrical energy used in your facility and then uses your
existing wired or wireless Ethernet network to deliver that data
to online software applications. You can see real-time and
Split-Core Current Transformer, ACT Series
historical use, eliminate guesswork, and pinpoint problem
areas to reduce energy costs.
You can also use energy data from the OptoEMU Sensor in
control systems and company databases. For more
information, see form 1936, the OptoEMU Sensor 3V Data
Sheet.
These CTs are also recommended for use with the SNAPAIPM-3V analog input module, which monitors power from a
3-phase load. The module measures voltage and current from
each phase; it calculates watts and volt-amps for each phase
plus true power sums for all phases.
Part of the SNAP PAC System, the SNAP-AIPM-3V mounts on a
rack with other analog, digital, and serial modules and an I/O
processor. For more information, see the Power Monitoring
Modules Data Sheet, form 1453.
Part Numbers
Part Description
OPTOEMU-ACT0750-050
OPTOEMU-ACT0750-100
OPTOEMU-ACT0750-250
OPTOEMU-CTS1250-400
OPTOEMU-CTS2000-600
Current Transformer, Split Core, 50 A,
0.333 VAC, 0.75 inch (1.91 cm) Inner
Diameter
Current Transformer, Split Core, 100 A,
0.333 VAC, 0.75 inch (1.91 cm) Inner
Diameter
Current Transformer, Split Core, 250 A,
0.333 VAC, 0.75 inch (1.91 cm) Inner
Diameter
Current Transformer, Split Core, 400 A,
0.333 VAC, 1.25 inch (3.18 cm) Inner
Diameter
Current Transformer, Split Core, 600 A,
0.333 VAC, 2 inch (5.08 cm) Inner Diameter
DATA SHEET
Form 1938-120817
© 2010–2012 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered t rademarks of their respective companies or organizatio ns.
PAG E
1
Split-Core Current Transformers
OPTOEMU-ACT-0750-050 OPTOEMU-ACT-0750-100 OPTOEMU-ACT-0750-250
Rated Current (primary) 50 amps 100 amps 250 amps
Output (secondary) 0.333 VAC 0.333 VAC 0.333 VAC
Dimensions
2.38 x 2.40 x 0.90 in. (6.04 x
6.10 x 2.29 cm)
2.38 x 2.40 x 0.90 in. (6.04
x 6.10 x 2.29 cm)
2.38 x 2.40 x 0.90 in. (6.04 x
6.10 x 2.29 cm)
Inner Diameter 0.78 in. (2.0 cm) 0.78 in. (2.0 cm) 0.78 in. (2.0 cm)
Leads
8 ft (2.4 m), 22 AWG, twisted
pair
8 ft (2.4 m), 22 AWG,
twisted pair
8 ft (2.4 m), 22 AWG, twisted
pair
Accuracy
± 0.75% from 1% to 120% of
rated primary current
± 0.75% from 1% to 120%
of rated primary current
± 0.75% from 1% to 120%
of rated primary current
Phase Angle
± 0.5 degrees (30 min) from
1% to 120% of rated current
± 0.5 degrees (30 min) from
1% to 120% of rated current
± 0.5 degrees (30 min) from
1% to 120% of rated current
Agency Approvals UL, CE, RoHS UL, CE, RoHS UL, CE, RoHS
Warranty* 5 years* 5 years* 5 years*
* Original manufacturer’s warranty applies. See http://www.ccontrolsys.com/w/Warranty
All diagrams courtesy of Continental Control Systems LLC
Specifications: ACT Series
Split-Core Current Transformers
DATA SHEET
Form 1938-120817
PAG E
2
© 2010–2012 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered tradema rks of their respective companies or organizations.
Split-Core Current Transformers
Refer to dimensional diagram below.
OPTOEMU-CTS-1250-400 OPTOEMU-CTS-2000-600
Rated Current (primary) 400 amps 600 amps
Output (secondary) 0.333 VAC 0.333 VAC
Dimension A (width) 3.25 in. (6.45 cm) 4.75 in. (12.1 cm)
Dimension B (depth) 3.35 in. (8.51 cm) 5.00 in. (12.7 cm)
Dimension C (height) 1.00 in. (2.54 cm) 1.20 in. (3.05 cm)
Inner Diameter (D, E) 1.25 in. (3.18 cm) 2.00 in. (5.08 cm)
Leads 8 ft (2.4 m), 22 AWG, twisted pair 8 ft (2.4 m), 22 AWG, twisted pair
Accuracy
± 1% from 10% to 130% of rated
current
± 1% from 10% to 130% of rated
current
Agency Approvals UL, CE, RoHS UL, CE, RoHS
Warranty* 5 years* 5 years*
* Original manufacturer’s warranty applies. See http://www.ccontrolsys.com/w/Warranty
Wiring Notes
Install CTs on the phase conductor that corresponds to the
voltage input phase.
Install CTs with the arrow or label “THIS SIDE TOWARD
SOURCE” facing toward the current source.
When properly oriented toward the source, the CT’s black wire
is positive and the white wire is neutral.
All diagrams courtesy of Continental Control Systems LLC
Specifications: CTS Series
Split-Core Current Transformers
© 2010–2012 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered t rademarks of their respective companies or organizatio ns.
DATA SHEET
Form 1938-120817
PAG E
3
More About Opto 22
Products
Opto 22 develops and manufactures reliable, flexible, easy-touse hardware and software products for industrial automation,
energy management, remote monitoring, and data
acquisition applications.
OptoEMU Energy Management System
The easy-to-use OptoEMU Sensor monitors electrical energy
use in your facility and delivers detailed, real-time data you
can see and analyze. The Sensor can monitor energy data from
pulsing meters, electrical panels or subpanels, and equipment.
View energy data online using a software service or
incorporate the data into your control system for complete
energy management.
SNAP PAC System
Designed to simplify the typically
complex process of selecting and
applying an automation system, the
SNAP PAC System consists of four
integrated components:
SNAP PAC controllers
PAC Proj e ct
SNAP PAC brains
SNAP I/O
SNAP PAC Controllers
Programmable automation controllers (PACs) are
multifunctional, modular controllers based on open standards.
Opto 22 has been manufacturing PACs for over two decades.
The standalone SNAP PAC S-series and the rack-mounted
SNAP PAC R-series both handle a wide range of digital, analog,
and serial functions for data collection, remote monitoring,
process control, and discrete and hybrid manufacturing.
SNAP PACs are based on open Ethernet and Internet Protocol
(IP) standards, so you can build or extend a system easily,
without the expense and limitations of proprietary networks
and protocols.
PAC P roj e c t Softwa re Su i t e
Opto 22’s PAC Project Software Suite provides full-featured,
cost-effective control programming, HMI (human machine
interface) development and runtime, OPC server, and
database connectivity software for your SNAP PAC System.
Control programming includes both easy-to-learn flowcharts
and optional scripting. Commands are in plain English;
variables and I/O point names are fully descriptive.
PAC Project Basic offers control and HMI tools and is free for
download on our website, PAC Project
Professional, available for separate purchase, adds
™
Software Suite
™
OptoOPCServer, OptoDataLink, options for controller
redundancy or segmented networking, and support for legacy
Opto 22 serial
SNAP PAC Brains
While SNAP PAC controllers provide central control and data
distribution, SNAP PAC brains provide distributed intelligence
for I/O processing and communications. Brains offer analog,
digital, and serial functions, including thermocouple
linearization; PID loop control; and optional high-speed digital
counting (up to 20 kHz), quadrature counting, TPO, and pulse
generation and measurement.
SNAP I/O
I/O provides the local connection to sensors and equipment.
Opto 22 SNAP I/O offers 1 to 32 points of reliable I/O per
module, depending on the type of module and your needs.
Analog, digital, and serial modules are all mixed on the
same mounting rack and controlled by the same processor
(SNAP PAC brain or rack-mounted controller).
mistic
™
I/O units.
Quality
Founded in 1974, Opto 22 has established a
worldwide reputation for high-quality products. All
are made in the U.S.A. at our manufacturing
facility in Temecula, California. Because we do
no statistical testing and each part is tested
twice before leaving our factory, we can
guarantee most solid-state relays and optically
isolated I/O modules for life.
comprehensiv
staff of support engineers represents decades of training and
experience. Support is
Additional support is always available on our website: how-to
videos, OptoKnowledgeBase, self-training guide,
troubleshooting and user’s guides, and OptoForums.
In addition, hands-on training is available for free at our
or 951-695-3000, or visit our website at
e technical support for Opto 22 products. Our
contac
t Opto 22 headquarters at
© 2012 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organi zations.
Form 1335-110907
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