Sonel C-7A Current Clamp User Manual
- June 21, 2024
- Sonel
Table of Contents
CURRENT CLAMP
C-7A
USER MANUAL
Version 1.02 18.10.2023
Description
The C-7A clamp is designed to measure AC currents with frequencies up to 3 kHz
for range up to 100 A.
The output signal is a voltage proportional to the measured current at the
sensitivity of 5 mV/A.
It is introduced via a cable (length: 3 m) ended with a pin suitable for a
socket in the meter.
The arrow marked on one of the clamps indicates the direction of current flow.
It is assumed that the current flows in the positive direction if it flows
from the source to the receiver.
This orientation of clamps is required for the correct power measurement.
Safety
NOTE!
- Do not expose the clamp to water.
- Do not use non-insulated clamps for conductors with a potential exceeding 300 V with respect to the ground and in systems with the measurement category higher than III.
Operation
To measure the current, open the clamp slightly by turning the clasp, clamp it on the conductor with flowing current and roughly center the conductor relative to the clamp loop. Pay attention to the direction of the arrow, to avoid the power measurement error. The gap (formed by the faces of the core) should be kept perfectly clean.
Cleaning and maintenance
NOTE!
Apply only maintenance methods specified by the manufacturer in this manual.
Before cleaning, disconnect the clamp from the tested circuit and the meter.
Do not spray the clamps with water.
Remove the dust from the gap with a soft and dry cloth. Periodically wipe the
accessible iron part of the jaws with an oil-soaked cloth to prevent possible
corrosion.
The clamp may be cleaned with a soft, damp cloth using all-purpose detergents.
Do not use any solvents.
Dismantling and utilisation
Worn-out electric and electronic equipment should be gathered selectively,
i.e. it must not be placed with waste of another kind.
Worn-out electric equipment should be sent to a collection point in accordance
with the law of waste electrical and electronic equipment.
Before the equipment is sent to a collection point, do not dismantle any
elements.
Observe the local regulations concerning disposal of packages.
Reference conditions
a) temperature …………………………………..+18…+28°C
b) relative humidity ……………………………<85%
Technical data
Basic technical data
| Frequency | Accuracy ¹) |
|---|---|
| 50/60 Hz | ±(0.5% + 0.02 A) |
| 40 Hz…1 kHz | ±(1.0% + 0.04 A) |
¹) as % of the measured value
| Frequency | Max. phase error |
|---|---|
| 45 Hz…65 Hz | ±2° |
a) measuring range …………………….. 0…100 A AC
b) frequency range ……………………….40 Hz..3 kHz
c) maximum allowable continuous current ………………….. 100 A AC (50/60 Hz)
d) output level ……………………………. 5 mV AC/1 A AC
e) output impedance …………………… ca. 10 Ω
- When using the clamp with a SONEL meter, total measurement accuracy of the measuring system of the meter and clamp is specified in the manual of a given meter.
- The accuracy of the clamp given in this manual is not the sum of the accuracy of the meter and accuracy of the clamp.
Other technical data
a) insulation type acc. to IEC 61010-1 …………. double
b) measurement category acc. to IEC 61010-1 …… III 300 V
c) pollution degree ………………………….. 2
d) dimensions…………………………………. 100 × 60 × 26 mm
e) weight ………………………………………. ca. 160 g
f) maximum diameter of tested cable …………… Ø24 mm
g) length of clamp cable………………………………. 3 m
h) operating temperature …………… 0°C…+50°C
i) relative humidity …………………… <85% (non-condensing)
j) the product meets the EMC requirements according to ………. IEC61010-1,
IEC61010-2-032, IEC 61326
Manufacturer
The manufacturer, which also provides guarantee and post-guarantee services:
SONEL S.A.
Wokulskiego 11 58-100 Świdnica
Poland
tel. +48 74 884 10 53 (Customer Service)
e-mail:customerservice@sonel.com
web page: www.sonel.com
Manufactured in Japan for SONEL S.A.
Documents / Resources
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Sonel C-7A Current
Clamp
[pdf] User Manual
C-7A Current Clamp, C-7A, Current Clamp, Clamp
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