Series CCT Current Transformers
Specifications - Installation and Operating Instructions
Bulletin PC-CCT
S
PECIFICATIONS
Amperage Range: Field selectable; up to 200 A (depending on model).
Output: 0 to 5 V, 0 to 10 V, 4 to 20 mA, 4 to 20 mA true RMS (depending on model).
P
ower Requirements: Self powered; 15 to 42 VDC, loop powered; 24 VDC
n
ominal (depending on model).
A
ccuracy: 1%.
Operating Temperature: -22 to 158ºF (-30 to 70ºC).
Operating Humidity: 0 to 95% (non-condensing).
Response Time: 250 ms to 90%.
Isolation Voltage: 2000 V.
Frequency: 10 to 400 Hz.
Enclosure Rating: UL, 94 V-O flammability rated, ABS plastic housing.
Agency Approvals: CE, UL.
2-7/16
[62.00]
5
5/64
[22.00]
SPLIT MODELS
4-1/64
[102.00]
S
OLID MODELS
55/64
[22.00]
2
-3/4
[
70.00]
2
-33/64
[
64.00]
1
9/32
[
15.00]
43/64
[17.00]
2
X
Ø
13/64
[
Ø5.00]
3
-1/2
[
89.00]
1-17/64
[32.00]
2X Ø13/64
[Ø5.00]
45/64
[18.00]
3
3/64
[
13.00]
2-31/64
[63.00]
3
3/64
[
13.00]
63/64
[25.00]
2
-29/32
[
74.00]
3-1/2
[89.00]
55/64
[22.00]
1-9/64
[29.00]
Ø
3/4
[
Ø19.00]
The Series CCT40/50 Current Transformers are a low cost alternative for
m
easuring power and monitoring the operation of fans, pumps, and other
e
quipment. Series CCT60/70 True RMS Current Transformers provide true RMS
o
utputs on distorted AC waveforms. Split core models can be installed without
disconnecting cables. Each model offers three jumper selectable ranges and a
choice of three different outputs.
OPERATING INSTRUCTIONS
RISK OF SHOCK
QUICK SETUP
1. Run the wire you are monitoring through the opening in the sensor.
2. Mount the sensor to a surface if needed.
3. Connect output wiring.
4. Select the correct range by positioning the jumper.
INSTALLATION
Solid core Versions:
• Run wire to be monitored through opening in the sensor.
• Sensor can be mounted using screw holes in any position or hung directly on
wires with wire ties.
Split core Versions:
• Press the tab toward the sensor to open.
• After placing the wire in the opening, press the hinged portion down firmly until a
definite click is heard and the tab pops out fully.
• Sensor can be mounted using screw holes in any position or hung directly on
wires with wire ties.
The Series CCT Current Transformers are intended to provide
an input to equipment under normal operating conditions.
Where failure or malfunction of the current transformer could lead to personal injury
or property damage to the controlled equipment or other property, additional
precautions must be designed into the control system. Incorporate and maintain
other devices such as supervisory or alarm systems or safety or limit controls
intended to warn of, or protect against, failure or malfunction of the CCT.
NOTICE
Disconnect power supply before making electrical connections.
Contact with components carrying hazardous voltage can
cause electrical shock and may result in severe personal injury or death.
DANGER
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
O
UTPUT WIRING
•
Connect control or monitoring wires to the sensor.
•
Use 14 to 22 AWG copper wire.
•
Tighten terminals securely.
• Be sure the output load or loop requirements are met.
RANGE SELECTION
F
or models that feature field selectable ranges:
•
Determine the normal operating amperage of the monitored circuit.
•
Select the range that is equal to or slightly higher than the normal operating
amperage.
• Place the range jumper in the appropriate position according to selection.
TROUBLESHOOTING
MAINTENANCE
Upon final installation of the Series CCT Current Transformers, no routine
maintenance is required. A periodic check of system calibration is recommended. The
Series CCT is not field serviceable and should be returned if repair is needed (field
repair should not be attempted and may void warranty). Be sure to include a brief
description of the problem plus any relevant application notes. Contact customer
service to receive a return of goods authorization number before shipping.
Symptom
S
ensor has no output.
O
utput signal is too low.
Output signal is always at maximum.
Sensor is always at 4 mA.
Output signal is always at 20 mA.
S
olution
•
Polarity is not properly matched. Check and correct wiring polarity.
•
For Model CCT40/50-102/202/203: Monitored load is not AC or is
not on. Check that the monitored AC load is on.
• For Model CTXX-100/200: Power supply is not properly sized.
Check power supply current and voltage rating.
• For Model CCTXX-100/102: The core contact area may be dirty.
Open the sensor and clean the contact area.
• The jumper may be set in a range that is too high for current being
monitored. Move the jumper to the correct range.
•
Monitored current is below minimal current required. Loop the
m
onitored wire several times through the opening until the sensed
c
urrent rises above the minimum. Sensed Amps=Actual Amps x
Number of Loops. Count the loops on the inside of the opening.
• For Model CCT40/50-102/202/203: Output load is too low. Check
output load; be sure it is at least 100kΩ and preferably 1 MΩ.
• For Model CCTXX-100/200: The load current is not sinusoidal.
Select a true RMS transformer (Series CCT60/70) that works on
distorted waveforms.
• For Model CCT40/50-102/202/203: The jumper may be set in a
range that is too low for current being monitored. Move jumper to
the correct range.
• For Model CCTXX-100/200: Monitored load is not AC or is not on.
Check that the monitored AC load is on.
• For Model CCTXX-100/200: The jumper may be set in a range that
is too low for current being monitored. Move jumper to the correct
range.
K
eep split core sensors clean. Be careful not to allow grit or dirt
to build up on contacts. Operation can be impaired if the mating
surfaces do not have a connection. Always check visually, before closing.
NOTICE
Leave at least one inch distance between the sensor and other
magnetic devices.
N
OTICE
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
©Copyright 2015 Dwyer Instruments, Inc.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
Printed in U.S.A. 4/15 FR# 443843-00 Rev. 2
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