CT7044
CT7045
CT7046
Instruction Manual
2017
Nov.
Printed in Japan
CT7044A961-01 17-11H
Revised edition 1
AC FLEXIBLE
CURRENT SENSOR
EN
16-01 EN
Introduction
Thank you for purchasing the Hioki CT7044, CT7045, CT7046
AC Flexible Current Sensor. To obtain maximum performance
from the device, please read this manual rst, and keep it
handy for future reference.
Be sure to also read the separate booklet “Current Sensor
Operating Precautions” before use.
Use Environment of the Device
WARNING
Although part of this device is designed to resist
the ingress of dust and dripping water, it is not
entirely waterproof or dustproof, so to avoid electric
shock or damage, do not use it in a wet or dusty
environment.
Troubleshooting
If the device seems to be malfunctioning, contact your
authorized Hioki distributor or reseller.
Overview
This device measures large currents of up to 6000 A AC.
The air core coil makes the sensor unit highly exible,
allowing it to be used for clamping in narrow spaces with
crowded wiring.
This current sensor has a Hioki PL14 output connector,
enabling it to be automatically recognized when connected to
a compatible instrument for simple setup.
Specications
General Specications
CT7044 CT7045 CT7046
Operating
environment
Operating temperature and humidity
Temperature
Humidity Less than 40°C (104°F): 80% RH or less
Storage
temperature
and humidity
Dustproof and
waterproof
Standards
Dielectric
strength
Power
consumption
category
Dimensions
(circuit box)
Mass
Cable length
Flexible loop
length
Flexible loop
cross-sectional
diameter
Flexible loop
end cap
diameter
Product
warranty period
Accessories
Indoors, pollution degree 2,
altitude up to 2000 m (6562 ft.)
−
25°C to 65°C (−13°F to 149°F)
From 40°C to 65°C (104°F to 149°F):
Maximum relative humidity declining linearly from 80%
RH at 40°C (104°F) to 25% RH at 65°C (149°F)
(no condensation)
−30
°C to 70°C (−22°F to 158°F), 80% RH or less
(no condensation)
IP54 (EN60529)
(when sensor is connected to a compatible instrument)
Safety: EN61010
EMC: EN61326
8.54 kV AC rms for 1 minute (at 50 Hz/ 60 Hz)
(between exible loop and output connector)
Sensor power consumption category: 1
(See the continuous operating time for the instrument to
which the device is to be connected.)
Approx. 25W × 72H × 20D mm (0.98″W × 2.83″H ×
0.79″D) (excluding protruding parts)
Approx. 160 g
(5.6 oz.)
Approx. 2300 mm (90.55″) (between exible loop and
circuit box)
Approx. 200 mm (7.87″) (output cable)
Approx. 390 mm
(15.35″)
Approx. φ7.4 mm (φ0.29″)
Approx. φ9.9 mm (φ0.39″)
1 year
• Instruction Manual
• Current Sensor Operating Precautions
Approx. 174 g
(6.1 oz.)
Approx. 630 mm
(24.80″)
Approx. 186 g
(6.6 oz.)
Approx. 870 mm
(34.25″)
Input Specications, Output Specications, and
Measurement Specications
(1) Basic specications
CT7044 CT7045 CT7046
Output
connector
Rated
measurement
current
Internal ranges 600 A AC / 6000 A AC
Maximum
measurement
current
Frequency
band
Measurable
conductor
diameter
Maximum rated
voltage to earth
Frequency derating (continuous, design values)
12000
10000
8000
6000
4000
2000
Measurement current [A]
(2) Accuracy specications
f.s. (range): The currently selected range.
rdg. (reading or displayed value): The value currently being
Conditions of
guaranteed
accuracy
Measurement accuracy
Amplitude
accuracy
Phase
accuracy
Temperature
coefcient
Effect of
conductor
position
Effect of
external
magnetic eld
Offset voltage ±1 mV or less
Hioki PL14
6000 A AC
*Range can be controlled from a connected instrument.
RMS value, continuous: see "Frequency derating" below.
Peak value: 1500 A peak (600 A range)
: 15000 A peak (6000 A range)
under the RMS value conditions described below.
1000 A or less and 5×10
10000 A or less and 2×10
10 Hz to 50 kHz (within ±3 dB)
100 mm (φ3.94″)
φ
or less
1000 V AC (Measurement category III)
600 V AC (Measurement category IV)
(Anticipated transient overvoltage: 8000 V)
6000 A range
600 A range
0
10 100 1 k 10 k 100 k
Frequency [Hz]
6
A・Hz or less (600 A range)
7
A・Hz or less (6000 A range)
180 mm (φ7.09″)
φ
or less
254 mm (φ10.00″)
φ
or less
measured and indicated on the
measuring instrument.
CT7044 CT7045 CT7046
Guaranteed accuracy period: 1 year
Guaranteed accuracy period after adjustment made by
Hioki: 1 year
Opening and closing of the exible loop:
10000 times or less
Accuracy guarantee for temperature and humidity:
23°C±5°C (73°F±9°F), 80% RH or less
(With no exible loop stretching, damage, or
cross-sectional deformation in shape)
±1.5% rdg. ±0.25% f.s. (Full-scale value is determined by
the selected internal range.)
(at 45 Hz to 66 Hz, at exible loop center)
Within ±1.0° (at 45 Hz to 66 Hz)
In the operating temperature range, add 0.05 × specied
accuracy/°C (at temperatures other than 23°C±5°C).
Within ±3.0% (deviation from center)
1.25% f.s. or less. 1.5% f.s. or less.
(400 A/m, 50 Hz/ 60 Hz)
Parts Names
LOCK
UNLOCK
LOCK
UNLOCK
LOCK
LOCK
Example: CT7044
Output
connector
Circuit box
Cable
Coupling
Connect the output connector to the
1
connected instrument
Instrument
Align and insert the connector.
Align the arrow on the deviceʼs output connector
with the
on the connected instrumentʼs sensor
input connector and insert the connector.
Disconnect the exible loop from the
2
coupling
Once measurement is complete, remove
5
the device from the conductor and
disconnect it from the instrument.
When disconnecting the device from the instrument, grip the tip of the output connector (the part
with the arrow) and pull the connector straight out.
Pulling forcibly on the base of the connector may
damage the device.
Memo
Output cable
Flexible loop
Measurement Methods
Inspection Before Use
Verify that the device operates normally to ensure that no
damage occurred during storage or shipping. If you nd any
damage, contact your authorized Hioki distributor or reseller.
Check Items Remedy
Is the exible loop or
cable insulation torn, or is
any metal exposed?
Is there a broken connection involving the connector or sensor base?
• Attach the clamp around only one conductor. If you
clamp single-phase (2-wire) or three-phase (3-wire)
conductors together, the device will not be able to make a
measurement.
Device damage may result in electric
shock. Contact your authorized Hioki
distributor or reseller.
Broken connections will make
proper measurement impossible.
Discontinue use and contact your
authorized Hioki distributor or reseller.
UNLOCK
Rotate the dial until the blue mark
1
is in the UNLOCK position.
Clamp the conductor
3
Clamp only the conductor you wish
Load
Source
Direction of
current ow
Connect the exible loop to the coupling
4
Electric
conductor
Current direction
indicator
to measure with the current direction indicator pointing toward the
load side.
(To ensure that the measured current and sensor output have the
same phase.)
Remove
2
OK
NO
• Be aware of the following precautions to avoid damage to
the device:
Do not pull with
excessive force.
NO
Wire band
NO
Do not store while bent.
Do not force
the exible
loop into a
bent position.
NO
UNLOCK
Insert
1
Rotate the dial until the blue mark
2
is in the LOCK position.
Pulling on the exible loop with a large amount
of force while in the locked state may cause it to
become disconnected from the coupling.
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