Page 1
CT7116
「 シ ー ル ド 線 は 挟 ま な い 」の 説 明 を
記載する/しないは製品ごと技術に確認する
↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
OK
NO
NONO
AC LEAKAGE CURRENT SENSOR
Instruction Manual
Oct. 2016 Edition 1 Printed in Japan
CT7116A961-00 16-10H
EN
Overview
This current sensor has a Hioki PL14 output connector,
enabling it to be automatically recognized when connected to
a compatible instrument for simple setup.
This device, which supports AC current measurement, has
a rated current of 6 A. The device can be relied upon to
measure subtle current with great accuracy due to the highpermeability material used for the jaws and magnetic shield.
Parts Names
Protective barrier
Output
connector
Jaw
Current
direction
indicator
Procedure
Connect the device to the compatible
1
instrument.
Compatible instrument
Align the arrow on the device’s output connector
with the mark on the compatible instrument’s
sensor input connector and insert the output
connector.
Attach the clamp around the one or more
2
conductors.
Squeeze the lever to open the jaw and attach
the jaw around the conductors in a way that the
conductors passes through the center of the jaw.
Aligning them with each other
and insert the connector.
To Extend the Cable
Use of only the optional Model L0220 series is allowed. The
cable is extendable by up to 10 m. The device can operate
under the following conditions: however, no performances of
the device are guaranteed.
• Two or more extension cables are connected in series.
• The cable is extended by more than 10 m.
Load Current Measurement
IMPORTANT
• 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.
Warranty
Warranty malfunctions occurring under conditions of normal
use in conformity with the Instruction Manual and Product
Precautionary Markings will be repaired free of charge. This
warranty is valid for a period of one (1) year from the date
of purchase. Please contact the distributor from which you
purchased the product for further information on warranty
provisions.
Introduction
Thank you for purchasing the Hioki CT7116 AC Leakage
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.
Cable
Lever
Measurement Procedure
Inspection Before Use
Verify that no damage occurred during storage or shipping. If
you nd any damage, contact your authorized Hioki distributor
or reseller.
Check item Remedy
Is the jaw cracked or
damaged?
Is the cable insulation
torn?
Is the cable broken at the
base of the connector or
grip?
Discontinue use and contact your
authorized Hioki distributor or reseller. If
there is any damage, an electric shock
may result.
Discontinue use and contact your
authorized Hioki distributor or reseller.
Broken connections will make proper
measurement impossible.
If the clamp is attached with the current direction
indicator pointed in the opposite direction of
currents, phases of measurement results will shift
relative to measured currents by 180 degrees.
See “Load Current Measurement,” “Leakage
Current Measurement,” or “Checking for Insulation
Faults” for more details.
Verify that the jaw is fully closed.
3
Close the tips of the jaw completely before
performing measurement. If the output cable is
caught on the jaw or the jaw is forced into the
measurement location, it may not close completely.
If this occurs, it will not be possible to obtain an
accurate measurement.
On completion of the measurement, detach the
4
device from the conductors and unplug it from
the instrument.
To unplug the device from the instrument, pull
straight the cable out of the instrument, grasping the
part with the arrow marked of the output connector.
Pulling strongly the base of the output cable could
cause the device to be damaged.
Attach the clamp around only one of the conductors in
a way that it passes through the center of the clamp.
Conductor
Load
Current direction
Source
Current direction
indicator
1 2 3 4
Page 2
Leakage Current Measurement
35
Ground
conductor
measurement
Bundle
measurement
Single-phase three-wire system
Transformer
Attach the clamp around only one of
the conductors (as indicated by “1” in
the gure below).
Attach the clamp the conductors in
a bundle (as indicated by “2” in the
gure below).
2
1
Ig: Leakage
current
E (PE)
Three-phase three-wire system
Load device
2
2
Load
device
1
Ig: Leakage current
E (PE)
PE
Single-phase two-wire system
Attach the clamp around the two conductors in a bundle.
Three-phase four-wire system
Attach the clamp around the four conductors in a bundle.
If this is not possible, the measurement can also be carried
out by attaching the clamp around the ground conductor of
the equipment.
Checking for Insulation Faults
Measuring leakage currents owing through each conductor
in a circuit enables you to determine whether an earth
leakage is present or not based on a variation in leakage
currents.
It is useful to use a waveform recorder in combination with the
device in order to check for an earth leakage that arises only
when a specic installation is activated.
Attach the clamp around the ground conductor
1
E (PE) of the transformer (as indicated “1” in the
gure below).
If an earth leakage is determined to be present,
2
look for a location of the insulation fault by
performing the bundle measurement (attaching
the clamp around conductors in a bundle),
attaching it at a location closest to the source
2
rst, and then locations closer to the load in
steps.
• See the gure below. If an insulation fault arises
in the conductor at the location A, the leakage
current can be detected by the bundle measurement
performed at the location
.
(2)
, but not at the location
(1)
• If an insulation fault arises in the load device at the
location B, the leakage current can be detected by
performing the bundle measurement at the location
, but not at the location
(3)
(4)
.
Single-phase three-wire system
(1)
(2)
(3)
1
1
Ig
A
E (PE)
Load devices
B
Ig: Leakage current
Specifications
(4)
Standards
Dust-proofness,
water-proofness
Power
consumption
category
Dimensions Approx. 74W × 145H × 42D mm
Mass Approx. 340 g (12.0 oz.)
Cable length Approx. 2500 mm (98.43″)
Product warranty
period
Accessories Instruction Manual, Current Sensor Operating
Options
Safety: EN61010
EMC: EN61326
IP40 (EN60529)
(with sensor connected and jaw closed)
Sensor power consumption category: 0
(2.91″W × 5.71″H × 1.65″D)
(excluding protrusions)
1 year
Precautions
Model L0220-01 Extension Cable (2 m)
Model L0220-02 Extension Cable (5 m)
Model L0220-03 Extension Cable (10 m)
Output Specications / Measurement
Specications
(1) Basic Specications
Output connector Hioki PL14
Rated measured
current
Output rate 100 mV AC/A
Maximum
measured current
Frequency range 40 Hz to 5 kHz
Measurable
conductor
diameter
Frequency derating curve
30
25
6 A AC
RMS value, continuous input: 10 A
(within the frequency derating curve stated
below)
However, 30 kA/Hz at a frequency of 1 kHz or
higher
Peak value (under the RMS value conditions
described above): 30 A peak
40 mm or less (insulated conductor)
φ
(2) Accuracy Specications
f.s.: The rated measurement current
rdg.: The value currently being measured and indicated on
the measuring instrument
Conditions of
guaranteed
accuracy
Amplitude
accuracy
Phase accuracy ±3° or less: 45 Hz to 66 Hz
Temperature
coefcient
Effect of
conductor
position
(deviation from
center)
Effect of external
magnetic eld
(400 A/m, 50 Hz /
60 Hz)
Residual current
characteristics
Maximum
extendable
length
Guaranteed accuracy
period:
Guaranteed
accuracy period from
adjustment made by
Hioki:
Opening and closing
of the jaw:
Accuracy guarantee
for temperature and
humidity:
• Sine wave input
• Equal to or less than the rated current but
within the derating curve
• Conductors passing through the center of the
jaw
• Not including any effects
±1.0% rdg. ±0.05% f.s. (45 Hz to 66 Hz)
±3.0% rdg. ±0.1% f.s. (other than the frequency
range between 45 Hz and 66 Hz but within the
frequency range)
(with a measured current of 1 A or more input)
Add {0.05 × (accuracy spec.)/°C} when
operated within the operating temperature
range (other than 23°C±5°C)
±0.1% or less
Corresponding to 5 mA, 7.5 mA at a maximum
5 mA or less (for a pair of electric conductors
carrying a current of 100 A each owing in
opposite direction of each other)
10 m (However, depending on instrument to
which device is connected)
1 year
1 year
10 000 times or less
23°C±5°C
(73.4°F±9°F), 80% RH
or less
• If a strong current (on the order of 100 A) is owing
through an adjacent circuit, accurate measurement may
not be possible. Perform the measurement at a sufcient
distance from other current-carrying conductors.
• A current with special waveform such as one owing
through the secondary side of an inverter may not be
measured correctly.
5 6 7 8
General Specications
Operating
environment
Operating
temperature and
humidity
Storage
temperature and
humidity
Indoors, Pollution Degree 2, altitude up to
2000 m (6562 ft.)
Temperature: −25°C to 65°C (−13°F to 149°F)
Humidity: 80% RH or less (no condensation)
Temperature: −25°C to 65°C (−13°F to 149°F)
Humidity: 80% RH or less (no condensation)
20
15
10
Measured current [A]
Measurement current [A]
5
0
10 100 1 k 10 k
Frequency [Hz]
Frequency [Hz]
Loading...