Megger iClamp Specifications
ICLAMP
1000 A AC Current Probe
CAT IV 600 V current measurement to
1000 A AC
1 mA/1 A sensitivity with rated burden
of 1 Ω
Large jaws for cables up to 52 mm
Overvoltage protection of the output
terminals
Suitable for leakage currents
ICLAMP
1000 A AC CURRENT PROBE
DESCRIPTION
The ICLAMP current probe is designed for measurements of
AC currents up to 1000 A with a 1000:1 step-down ratio.
The probe offers excellent accuracy (0.3% error at full range)
and small phase shift (0.7° at full range) so it can be used for
metering of power, energy and power quality applications.
Such high performance is achieved because the magnetic
cores are made from high-permeability Ni-Fe alloy.
The rated terminating resistance (burden) of 1 Ω must be
provided by the instrument connecting to ICLAMP.
The output terminals of ICLAMP are protected with a voltage
limiting circuit ensuring a safe-to-touch voltage under all
rated conditions.
ICLAMP is rated to CATIV 600 V, according the international
standard IEC 61010.
APPLICATIONS
The ICLAMP is a non contact current sensing clamp which
is simple to use and has application with the following
instruments:
n Power quality analysers
n Oscilloscopes
n Motor testers
n Clamp enabled earth testers
n Attached Rod Technique (ART)
n Stakeless testing
n Data loggers
n Digital multimeters
Clamp Usage
The ICLAMP is intended to clamp around a single phase of
the asset to be tested and not phase + neutral because this
would yield an incorrect result as a consequence of current
flowing in opposite directions. Try to keep clamps separate
wherever possible to improve quality of multiphase current
measurements.
An ammeter measuring up to 1 A can be connected directly
to the ICLAMP. A current of 1000 A will result in the ammeter
reading 1 A (1000:1 step down ratio).
The ICLAMP generates 1 mV output signal across 1 Ω burden
resistance for every 1 A of primary current, so if using a
multimeter, one with a mV AC range is required. Dedicated
earth tester instruments like Megger’s DET3TC, DET4TC
and DET4TCR will need to ensure the input resistance and
measurement circuitry are appropriate for the 1 mV – 1 V
input range and a primary current limit of 20 A.
If using a TRMS multimeter the voltage reading will be TRMS
because of the accuracy and crest factor performance of the
ICLAMP.
ICLAMP
1000 A AC CURRENT PROBE
ELECTRICAL SPECIFICATIONS
Step-down current ratio 1000:1
Sensitivity 1 mA/A
Amplitude and phase accuracy of the output signal
Primary current * Accuracy of
output signal
1 mA – 100 mA
0.1 A – 1 A
≤1% + 5 μA
1 A – 10 A
10 A – 100 A ≤0.5%
100 A – 1000 A ≤0.3%
* Unless otherwise specified, reference conditions are: 22 ±3°C, 50%
humidity, sinusoidal current at 50/60 Hz, no DC offset, centred
conductor, external magnetic field <40 A/m, load impedance
(burden) ≤1 Ω.
Maximum continuous current
1000 A at ≤500 Hz
100 A at >500 Hz
Frequency bandwidth 15 Hz – 10 kHz
Phase shift of
output signal
not specified
≤0.7°
ENVIRONMENTAL
Operating temperature -20 °C to +50 °C, <85% RH
-4 F to +122 F, <85% RH
(excluding ice or dirt in the jaws)
Storage temperature -40 °C to +70 °C, <85% RH
-40 F to +158 F, <85% RH
Influence of temperature ≤0.1% on amplitude
phase within specification
Influence of humidity amplitude and phase within
specification (excludes ice or dirt on
the jaws)
Max. conductor diameter 52 mm
GENERAL SPECIFICATIONS
Casing protection IP40 with jaws closed
Operating altitude 2000 m
Output terminals 4 mm shrouded sockets
Electrical safety IEC 61010-1:2010 + IEC 61010-2-
030:2010 + IEC61010-2-032:2002
Crest factor ≥6 for current up to 2000 A peak
(300 A rms)
Influence of crest factor ≤1% for CF≤4
Nominal load impedance ≤1 Ω (burden resistance)
Maximum output voltage ≤28 V peak (electronic limiter)
Influence of frequency 30 Hz – 5 kHz ≤0.25%
Influence of conductor
position in the jaws ≤0.3% of amplitude
Load influence up to 5Ω amplitude within specification up to
900 A
≤0.25% of amplitude above 900 A
≤0.1° on phase
Influence of DC offset ≤2% up to 20 A DC
Working voltage ≤600 V rms
EMC IEC61326-1
Safety CAT IV 600 V Pollution degree 2
Weight 700g
Dimensions 45 mm x 110 mm x 218 mm
ORDERING INFORMATION
Item (Qty) Cat. No.
ICLAMP 1001-012
VCLAMP 1001-013
UK
Archcliffe Road Dover
CT17 9EN England
T +44 (0) 1304 502101
F +44 (0) 1304 207342
UKsales@megger.com
UNITED STATES
4271 Bronze Way
Dallas TX 75237-1019 USA
T 800 723 2861 (USA only)
T +1 214 333 3201
F +1 214 331 7399
USsales@megger.com
OTHER TECHNICAL SALES OFFICES
Valley Forge USA, College Station USA, Sydney
AUSTRALIA, Täby SWEDEN, Ontario CANADA,
Trappes FRANCE, Oberursel GERMANY, Aargau
SWITZERLAND, Dubai UAE, Mumbai INDIA,
Johannesburg SOUTH AFRICA, Chonburi
THAILAND, Malaga SPAIN
CERTIFICATION ISO
Registered to ISO 9001:2008 Cert. no. Q 09250
Registered to ISO 14001-2004 Cert. no. EMS 61597
ICLAMP_DS_en_V01
www.megger.com
Megger is a registered trademark
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