Transmille EA002 Manual de usuario
EA002
2 / 10/ 50 TURN 1500A CLAMP COIL ADAPTER
OPERATION MANUAL
Ü
Version 1.00
April 2007
All product names are trademarks of their respective companies
EA002
2 / 10 / 50 Clamp Coil Adapter
Operation Manual
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 2
Guarantee and service
Transmille Ltd. guarantees this instrument to be free from defects under normal use
and service for a period of 1 years from purchase. This guarantee applies only to
the original purchaser and does not cover fuses, or any instrument which, in
Transmille’s opinion, has been modified, misused or subjected to abnormal
handling or operating conditions.
Transmille’s obligation under this guarantee is limited to replacement or repair of an
instrument which is returned to Transmille within the warranty period. If Transmille
determines that the fault has been caused by the purchaser, Transmille will contact
the purchaser before proceeding with any repair.
To obtain repair under this guarantee the purchaser must send the instrument in its
original packaging (carriage prepaid) and a description of the fault to Transmille at
the address shown below. The instrument will be repaired at the factory and
returned to the purchaser, carriage prepaid.
Note :
TRANSMILLE ASSUMES NO RESPONSIBILITY FOR DAMAGE IN TRANSIT
THIS GUARANTEE IS THE PURCHASER’S SOLE AND EXCLUSIVE GUARANTEE
AND IS IN LEIU OF ANY OTHER GUARANTEE, EXPRESSED OR IMPLIED.
TRANSMILLE SHALL NOT BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL
OR CONSEQUENTIAL DAMAGES OR LOSS.
Transmille Ltd.
Unit 4, Select Business Centre
Lodge Road
Staplehurst
Kent
TN12 0QW
United Kingdom
Tel : +44 0 1580 890700
Fax : +44 0 1580 890711
Web : www.transmille.com
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 3
TABLE OF CONTENTS
GUARANTEE AND SERVICE...............................................................................................................2
EA002 CLAMP COIL ADAPTER...........................................................................................................4
THEORY OF OPERATION....................................................................................................................4
HIGH ACCURACY DESIGN..................................................................................................................5
CALCULATING CLAMP METER ACCURACY. .............................................................................................5
INNOVATIVE CLOSED CONSTRUCTION DESIGN........................................................................................5
CONNECTION DIAGRAMS...................................................................................................................6
Terminal Configuration on rear of EA002 Coil Adapter.................................................................6
3000 Series 2A Terminals to 10 Turn Coil (Up to 20A simulation using coil)................................7
3000 Series 30A* Terminals to 10 Turn Coil (Up to 300A* simulation using coil).........................7
3000 Series 2A Terminals to 50 Turn Coil (Up to 100A simulation using coil)..............................7
3000 Series 30A* Terminals to 50 Turn Coil (Up to 1500A* simulation using coil).......................8
3000 Series 2A Terminals to 2 Turn Coil (Up to 4A simulation using coil)....................................8
3000 Series 30A* Terminals to 2 Turn Coil (Up to 60A* simulation using coil).............................8
CARE & MAINTENANCE......................................................................................................................9
Cleaning the Adapter.....................................................................................................................9
Handling Precautions.....................................................................................................................9
Servicing Information.....................................................................................................................9
Appendix A : Specifications
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 4
EA002 Clamp Coil Adapter
• Calibrates Clamp Meters up to 1000Amps
• 2 / 10 / 50 Turn Coils
• High Accuracy Balanced Design
• Wide range of clamp sizes covered
• Complete with alignment table & connection leads
Designed for the calibration of both wound (AC only) & Magnetic field (hall effect) AC/DC
clamp meters the Transmille current coil offers several unique features built in a robust
construction.
Theory of Operation
The coil effectively multiplies the current produced by the calibrator by the number of turns
of the coil, e.g. 2, 10, and 50 with the Transmille coil. The principle is each turn of the coil
produces a magnetic field proportional to the current flowing in it. If you take 50 wires all
side by side with the same current flowing in the same direction the magnetic field for each
turn of wire will add together and produce a magnetic field 50 times stronger, e.g. the
same magnetic field as one wire with 50 times the current flowing in it. By using a 50 turn
coil it is possible to calibrate clamp meters up to 1000 Amps without having to actually
generate more than 20 Amps (available from the 3000 Series calibrators). Clamp meters
up to 3000 Amps can be calibrated when using Transmille’s 50 Amp transconductance
amplifier.
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 5
High Accuracy Design
Clamp meters can measure current by using the invisible magnetic field generated round
any conductor carrying a current. The degree of magnetic coupling between the field
produced by the conductor and the jaws of the clamp meter varies due to the position of
the conductor within the jaws - this changes the current reading. Transmille’s coil is
designed to immerse both jaws of he clamp meter in the magnetic field while allowing the
‘gap’ or opening where magnetic flux will escape to protrude through the coil and stay out
of the strongest part of the field. This makes the reading less dependent on the position of
the clamp within the coil and also the quality of the jaw closing, allowing greater
confidence in the calibration.
Calculating Clamp Meter Accuracy.
There are two contributions to the total accuracy which should be taken into account when
calibrating clamp meters using a coil. The first is the accuracy of the current produced by
the calibrator, the second is the coupling between the coil and clamp meter. These must
be combined using a root sum of the squares. Empirical tests made on a wide range of
clamp meters calibrated by Transmille at its laboratory have shown that torroidal wound
current transformer type clamps typically exhibit better performance and will give coupling
errors of 0.2% and hall effect devices slightly higher at around 0.4%.
Innovative Closed Construction Design
Three coils in one provide the ability to calibrate a wide range of coils, from small lower
clamps down to 10mm jaw diameter to larger 2000A clamps. The low inductance, low
resistance properties allow the calibrators to easily drive the coil, giving plenty of overhead
for calibrating older clamps. The coils are fully enclosed in a strong, robust and compact
plastic enclosure preventing mechanical damage. This rugged design is ideal for using the
coil on-site and in harsh environments.
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 6
2 Turn Coil
Minimum 10mm inside
jaw diameter.
10 Turn Coil
Minimum 10mm inside
jaw diameter.
50 Turn Coil
Minimum 25.4mm inside
jaw diameter.
Connection Diagrams
Terminal Configuration on rear of EA002 Coil Adapter
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 7
3000 Series 2A Terminals to 10 Turn Coil (Up to 20A simulation using coil)
3000 Series 30A* Terminals to 10 Turn Coil (Up to 300A* simulation using coil)
*20A output = 200A Simulation for 3050
3000 Series 2A Terminals to 50 Turn Coil (Up to 100A simulation using coil)
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 8
3000 Series 30A* Terminals to 50 Turn Coil (Up to 1500A* simulation using coil)
*20A output = 1000A Simulation for 3050
3000 Series 2A Terminals to 2 Turn Coil (Up to 4A simulation using coil)
3000 Series 30A* Terminals to 2 Turn Coil (Up to 60A* simulation using coil)
*20A output = 40A Simulation for 3050
EA002 2 / 10 / 50 CLAMP COIL ADAPTER
OPERATION MANUAL
Transmille Ltd. Page 9
Care & Maintenance
The only maintenance instructions for the adapter is periodic cleaning.
See below for details on the cleaning procedure and precautions for handling.
Cleaning the Adapter
To keep the external enclosure of the adapter in good condition, clean the outer case with
a soft cloth. Do not use any liquids in cleaning the enclosure – removal of surface dust is
all that is recommended.
CAUTION
Do not use cleaning fluids or solvents for cleaning as these may damage the
enclosure and affect the plastic materials used in the adapter.
Handling Precautions
The adapter is designed for mechanical stability, but should not be subjected to excessive
shock or be dropped. Transportation is recommended using the original packaging with
avoidance of extreme changes of temperature.
Servicing Information
The adapter is provided certified from the factory, and uses precision components and are
not user repairable. If the adapter is damaged it should be returned to the factory for repair
and recalibration.
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