HVTest HTZZ-S10A User manual
1
Dear Client
Thank you for Purchasing our HTZZ-S10A Transformer DC
Winding Resistance Tester. Please read the manual in detail prior
to first use, which will help you use the equipment skillfully.
Our aim is to improve and perfect the
company's products continually, so there may be
slight differences between your purchase equipment
and its instruction manual. You can find the changes
in the appendix. Sorry for the inconvenience. If you have further
questions, welcome to contact with our service department.
The input/output terminals and the test column
may bring voltage, when you plug/draw the test wire or
power outlet, they will cause electric spark. PLEASE
CAUTION RISK OF ELECTRICAL SHOCK!
Company Address:
T4，No. 41, High-tech 2 Road，East Lake High-tech Development Zone，
Wuhan
Sales Hotline: 86-27- 87457960
After Service Hotline:86-27- 87459656
Fax: 86-27- 87803129
E-mail: [email protected]
Website: www.hvtest.cc
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SERIOUS COMMITMENT
All products of our company carry one year limited warranty
from the date of shipment. If any such product proves defective
during this warranty period we will maintain it for free. Meanwhile
we implement lifetime service. Except otherwise agreed by
contract.
SAFETY REQUIREMENTS
Please read the following safety precautions carefully to avoid
body injury and prevent the product or other relevant subassembly
to damage. In order to avoid possible danger, this product can only
be used within the prescribed scope.
Only qualified technician can carry out maintenance or repair
work.
--To avoid fire and personal injury:
Use Proper Power Cord
Only use the power wire supplied by the product or meet the
specification of this produce.
Connect and Disconnect Correctly
When the test wire is connected to the live terminal, please do
not connect or disconnect the test wire.
Grounding
The product is grounded through the power wire; besides, the
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ground pole of the shell must be grounded. To prevent electric
shock, the grounding conductor must be connected to the ground.
Make sure the product has been grounded correctly before
connecting with the input/output port.
Pay Attention to the Ratings of All Terminals
To prevent the fire hazard or electric shock, please be care of
all ratings and labels/marks of this product. Before connecting,
please read the instruction manual to acquire information about the
ratings.
Do Not Operate without Covers
Do not operate this product when covers or panels removed.
Use Proper Fuse
Only use the fuse with type and rating specified for the product.
Avoid Touching Bare Circuit and Charged Metal
Do not touch the bare connection points and parts of energized
equipment.
Do Not Operate with Suspicious Failures
If you encounter operating failure, do not continue. Please
contact with our maintenance staff.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in Explosive Atmospheres.
Ensure Product Surfaces Clean and Dry.
4
－Security Terms
Warning: indicates that death or severe personal injury may result
if proper precautions are not taken
Caution: indicates that property damage may result if proper
precautions are not taken.
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Contents
I. General................................................................................................... 6
II. Performance Index............................................................................ 7
III. Panel Description..............................................................................7
IV. Testing and Operating Method..................................................... 9
V. Precautions....................................................................................... 14
VI. Troubleshooting............................................................................. 15
VII. Transportation and Storage....................................................... 15
VIII. Unpacking and Inspection........................................................ 16
IX. Others................................................................................................ 16
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Thank you very much for selecting our products!
For your better use of this instrument, you are kindly requested to
read this manual carefully before you use it, so as to understand its
major performances and operation method.
Caution:①It is not allowed to remove the wiring and directly switch off the
power supply during the measurement.
②For the no-load voltage regulating transformer, it is not allowed to
switch the tapping switch during the measurement.
③In case of a sudden power failure during the measurement, this
instrument can discharge automatically. Please do not remove
the wiring immediately. Wait for at least 30 seconds before the
connection can be removed.
④The three-phase measurement applies to the windings of YN
connection. For the windings of yn connection, since difference
exists between the three-phase and single-phase measurement
results due to the effect of the resistance of the copper bus
connected, the single-phase measurement is recommended.
⑤Caution: The three-phase measurement result doses not include
the resistance value of the neutral lead. Therefore, it is
suggested to at least verify one data using the single-phase
testing method for each phase after completing the
measurement of three-phase resistance value, so as to
determine if the neutral lead is normal.
I. General
This fast DC resistance tester (hereinafter referred to as DC resistance
tester) is the product of the latest generation for measuring the DC resistance
of transformer and is optimally designed for measuring the DC resistance of
the three-phase winding of the large-capacity transformer. It can measure the
DC resistance of the three-phase winding at the same time. In case of the
on-load voltage regulating transformer, it is not required to discharge but to
directly adjust the tapping switch. The measurement time is one third of the
traditional single-phase measurement, greatly shortening the working time and
labor intensity. As the DC resistor tester is provided with large-screen LCD and
the graphical interfaces in Chinese, the operation is visual, clear and easy.
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Besides, it is provided with panel type printer and large-capacity non-volatile
memory, so the measurement results can be stored and printed out easily.
With good stability in data testing, speediness and perfect repeatability, it is the
best choice for the on-site measurement of DC resistance of transformer.
II. Performance Index
Testing current
Single phase: 1A 5A 10A 20A
Three phase: 1A 5A 10A
Measurement
scope
Single phase: 1A 10 mΩ～20Ω 5A 1 mΩ～4Ω
10A 1 mΩ～2Ω 20A 1 mΩ～1Ω
Three-phase: 1A 10 mΩ～6Ω (each phase)
5A 1 mΩ～1Ω (each phase )
10A 1 mΩ～0.6Ω (each phase )
Measurement
accuracy
± (0.2%Full span ± 2 words )
Maximum
resolution
0.1μΩ
Data storage
capacity
150 groups
Power supply
AC 220V±22V, 50Hz±2 Hz
Working
environment
Ambient temperature: 0℃～40℃ Relative humidity :≤80%RH
Overall
dimensions
440*205*455mm 3
The weight of
the
17kg
III. Panel Description
The panel of DC resistance tester is shown in the figure below:
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①Ia Ib Ic: The dc current output. In case of single phase or two-phase
measurement, Ia and Ib are current output.
②Ua Ub Uc Uo: The input of measuring voltage. In case of single-phase
measurement, Ua and Ub are voltage input. In case of two-phase
measurement, Ua and Ub are the voltage input of the first channel; Uc and Uo
are the input of the second channel.
3Panel printer: Prints the output measurement results.
4LCD: displays the measurement results and operation prompting
information, with the function definition of the five multi-function key-presses
under the current state given in the key definition zone on the right, as shown
in the figure below :
2007.01.01
Set
Measurement mode: three phase
Measuring current: 10 A
View
Wiring Diagram
Mode
Current
Measure
1 4 : 0 2 : 5 1
9
5: Contrast regulation of LCD
6Power socket: the power input of the complete unit, with built-in fuse
tube. The fuse tube is 10A/250V.
7Earthing pole: The earthing pole on the enclosure of the complete unit.
Make sure that it is reliably grounded during measurement.
IV. Testing and Operating Method
1Connect with the power source and earth wire, switch on the power
supply to enter into the initial interface, as shown in the figure below:
2 0 0 7 . 0 1 . 0 1
Set
Measurement method: Three phase
Testing current: 10 A
View
Wiring Diagram
Mode
Current
Measure
1 4 : 0 2 : 5 1
“Set” key-press: Set the current date and time.
“View” key-press: View the data stored, including measurement results,
testing date, tapping number and etc.
“Mode” key-press: Sets the measurement mode, including “Single Phase”,
“Two-phase” and “Three-phase”, besides, corresponding schematic wiring
diagram will be displayed in the zone of “Schematic Wiring Diagram” as the
reference for actual wiring.
“Current” key-press: Sets the size of testing current. In case of the
single-phase or two- phase measurement, the current 1A, 5A, 10A and 20A
can be selected. You may select suitable measuring current by referring to the
related parameters listed in the technical indicators as the reference.
“Measure” key-press: After the testing wire is connected and the
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measuring current is selected, press “Measure” key-press to start the test.
2Single-phase measurement:
The wiring method is shown in the figure below (Taking the measurement
as of RAB an example):
After the winding under test is wired and the suitable measuring current is
selected, press the “Measure” key-press to allow the tester to enter into its
measuring state and to start to supply power to the winding, and then it enters
into the interface as follows:
2 0 0 7 . 0 1 . 0 1
Tap
R
0. 0 A
Store
The battery is charging, please wait a moment！
Current tap: 01
Print
Re-test
Exit
1 4 : 0 2 : 5 1
At this time, the current of the winding starts to increase. If the charging
progress strip and the current display value stand still for a long time, it
indicates that the value of the resistance value to be measured is probably
beyond the measuring scope of the current, so it is not able to reach its set
value. At this time, press “Exit” key-press to return and re-select the current
and retry. When the set value is reached, it becomes constant. Then, enter into
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