T&R TPT9000 Istruzioni operative
2
GENERAL SAFETY STATEMENT
WARNING
The following safety precautions should be reviewedto avoid injury
to the user and damage to the product (and other products
connected to it). To avoid potential hazards only use this product
as specified.
•Only suitably qualified personnel should use this
equipment. Servicing of this product should only be
carried out by suitably qualified service personnel.
To Avoid Fire Hazards and Personal Injury
•Use the fused leads supplied with the unit.
•Ensure that systems that the unit is to be connected to are
dead.
•Do not connect and disconnect leads whilst outputs are
switched on. Breaking the output circuit with current flowing
may cause arcing.
•Terminal ratings must be observed to prevent fire hazards and
risk of injury to the operator. Consult the product manual for
ratings information before making connections to any terminal.
•It is ESSENTIAL to consult the product manual for rating
information before making any connection to a terminal or
terminal group marked with a warning triangle.
•Only use fuses of a type and rating specified for this product.
•Do not operate the unit out of its case or with any covers or
panels removed.
3
•Do not touch exposed connections and components when
power is present.
•Do not operate the product if any damage is suspected. Refer
the unit to qualified service personnel to be checked.
•Do not operate the unit in wet or damp conditions.
•Do not operate the unit in an explosive atmosphere.
•Warnings from cardiac pacemaker manufacturers state that strong
magnetic fields may affect operation. The TPT9000 may induce
large magnetic fields in transformers and should therefore not be
operated by, or in the vicinity of persons fitted with cardiac
pacemakers or any other electronic or electrical medical implants.
If any further queries occur regarding the usage
and maintenance of the equipment detailed in this
manual, please refer these to the supplier of the
equipment in the first case or to the manufacturer,
T & R Test Equipment Limited.
4
SAFETY TERMS AND SYMBOLS
The following safety symbols appear on the equipment:
WARNING –Refer to manual
Test Button
5
CONTENTS
1. DESCRIPTION OF EQUIPMENT 6
1.1 Connections, controls & display 7
1.1.1 LED messages 10
1.2.1 Environment 12
1.2.2 Supply requirements 12
1.2.3 Connection cable ratings 12
1.2.3 Overload protection 12
2Theory of Operation 13
2.1 Main current output 13
3. APPLICATIONS 15
3.1 Transformer Testing 15
3.1.1 CT Testing 15
3.1.2 Transformer Testing 17
3.1.3 High Primary Impedance Transformer Testing 19
4. MAINTAINANCE 21
4.1 Replacing the Battery 21
5. STANDARD ACCESSORIES 22
5.1 Spares fuses supplied 22
5.2 Standard accessories supplied 22
5.3 Optional accessories/spares 22
6. REVISION 23
6
1. DESCRIPTION OF EQUIPMENT
The TPT9000 is used for determining the correct polarity
of current and voltage transformers. The TPT9000
automatically detects if the transformer has been
connected incorrectly. The setalso includes a proving unit
to check the correct operation of the unit in the field.
The TPT9000 is designed to be used on ‘dead’ systems
(i.e., no externally supplied voltages are present on the
testobject). DonotconnecttheTPT9000to alivesystem.
Always check that the power to the device under test is
off and the circuit is isolated before making any
connections.
7
1.1 Connections, controls & display
Figure 1.1 TPT9000
8
Ref
Item
Function
A
Battery Low LED
Indicates if the internal battery
voltage has dropped below a
useable level
B
Reverse LED
Indicates that the test
transformer has one winding
connected with reversed
polarity to the other
C
Brown terminal
Connect to P1 of the test
transformer
D
Blue terminal
Connect to P2 of the test
transformer
E
Black terminal
Connect to S2 of the test
transformer
F
Red terminal
Connect to S1 of the test
transformer
G
Forward LED
Indicates that both windings of
the test transformer are
connected in the same polarity
H
Error LED
Indicates that the test
transformer has not been
connected properly
I
Test button
Switches the unit on and starts
a test
J
Magnet
For securing the TPT9000 while
testing
K
Battery cover
Remove cover to replace the
battery
9
Figure 1.2 Proving Unit
Ref
Item
Function
A
Polarity Switch
Switch test polarity between
Forward and Reverse
B
Connectors
Connectors to fit the proving
unit into the TPT9000
terminals.
10
1.1.1 LED messages
Figure 1.3 Green LED 1 second flash
The Green LED will light for 1 second when the transformer under
test has been connected with both windings in the same polarity.
Figure 1.4 Red LED 1 second flash
The Red LED will light for 1 second when the transformer under
test has been connected with the windings in a different polarity.
Figure 1.5 Amber LED 1 second flash
The Amber LED light for 1 second when the TPT9000 has carried
out a test on the test transformer but no response has been
detected on the return connections. This can be caused by poor
connections to the transformer windings.
Indice
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