
AC Current Probe
Model MD301
The Model MD301 is built for
ruggedness, versatility and ease of
use. It is designed with a unique
hook-shaped jaw that enables the user
to “pry” into or “hook” onto cables (will
accept 2 x 500kcmil) or even smaller
bus bars.
The Model MD301 measures up to
500A. It provides a voltage output
proportional to the measured
current.
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This voltage output enables
instruments without current ranges to
measure, display or log currents on an
AC voltage range.
The electronics and batteries are
self-contained in the handles.
The output of AC probes is
d c /Aa c .
1mV
Features
• Unique hook-shaped jaws that
enable the user to “pry” into or
“hook” onto cables
• Maximum conductor size is
2 x 500kcmil
• Works as a traditional current
transformer with ratio of 1000:1
Applications
• Electric utility
• Field testing
• HVAC
• Industrial maintenance
• Laboratory
• Plant maintenance
MD301_120107 (pdf) 0410 Rev. 02

Specifications
MODEL MD301
ELECTRICAL
Nominal Range 500A
Measurement Range 2 to 500Aa c
Transformation Ratio Voltage output
Output Signal 1mVd c /Aa c
Accuracy (500A Range)
25A 5% of Reading
100A 2% of Reading
250A 1% of Reading
500A 1% of Reading
Phase Shift 25A –
100A –
250A –
500A –
Overload 700A for 10 min
Frequency Range 48 to 1000Hz
(error: add 2% to the ref.)
Load Impedance ≥100kΩ
Working Voltage 600Vrms
Common Voltage 600Vrms
Output Termination 5 ft Lead
MECHANICAL
Operating Temperature -5° to 122°F (-15° to 50°C)
Storage Temperature -40° to 185°F (-40° to 85°C)
Jaw Opening 1.3” (33mm)
Maximum Conductor Size 1.18” (30mm), Max Bus Bar size: 2.48 x 0.20” (63 x 5mm)
Dimensions 2.6 x 7.68 x 1.34” (66 x 195 x 34mm)
Weight 14.82 oz (420g)
Polycarbonate Material Handles: 10% fiberglass charged polycarbonate UL94 VO
SAFETY
Electrical EN 61010-2-032
600V CAT III, Pollution: 2; 300V CAT IV, Pollution: 2
Electromagnetic EN 50081-1 Class B; EN 50082-2 Electrostatic discharge IEC 1000-4-2;
Compatibility Radiated field IEC 1000-4-3; Fast transients IEC 1000-4-4; Magnetic field at 50/60Hz IEC 1000-4-8
Double Insulation Yes
CE Mark Yes
Note: Reference conditions:
23°C ± 5°K, 20 to 75% RH, external magnetic field < 40A/m, no DC component, no external current carrying conductor, test sample
centered, 10Ω load.
MD301_120107 (pdf) 0410 Rev. 02
Technical Assistance (800) 343-1391 www.aemc.com 2 of 4

2.6"
(66 mm)
7.68"
(195 mm)
Ø=1.18" (30 mm)
Cable max.
2.5 x 0.19" (63 x 5 mm)
Bus Bar max.
Ø=0.98" (25 mm)
Dual Cable max.
I
1.34"
(34 mm)
Leads:
Double/ reinforced
5 ft (1.5m) lead
with safety 4mm
banana plug
ORDERING INFORMATION CATALOG NO.
AC Current Probe Model MD301 (Lead – 1mVd c /Aa c – 500A max) .............................. Cat. #1201.07
Includes a user manual
Accessories (Optional)
Banana plug adaptor (to nonrecessed plug) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #1017.45
MD301_120107 (pdf) 0410 Rev. 02
Technical Assistance (800) 343-1391 www.aemc.com 3 of 4

Contact Us
United States & Canada:
Chauvin Arnoux
d.b.a. AEMC
200 Foxborough Blvd.
Foxborough, MA 02035 USA
(508) 698-2115 • Fax (508) 698-2118
www.aemc.com
Customer Support – for placing an order, obtaining price and delivery:
customerservice@aemc.com
Sales Department – for general sales information:
sales@aemc.com
Repair and Calibration Service – for information on repair and calibration, obtaining a user manual:
repair@aemc.com
Technical and Product Application Support – for technical and application support:
techinfo@aemc.com
Webmaster – for information regarding www.aemc.com:
webmaster@aemc.com
®
, Inc.
®
Instruments
South America, Central America, Mexico, Caribbean, Australia and New Zealand:
Chauvin Arnoux
d.b.a. AEMC
®
, Inc.
®
Instruments
15 Faraday Drive
Dover, NH 03820 USA
(978) 526-7667 • Fax (978) 526-7605
export@aemc.com
www.aemc.com
All other countries:
®
Chauvin Arnoux
SCA
190, rue Championnet
75876 Paris Cedex 18, France
33 1 44 85 45 28 • Fax 33 1 46 27 73 89
info@chauvin-arnoux.com
www.chauvin-arnoux.com
MD301_120107 (pdf) 0410 Rev. 02
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