Huazheng HZ-3150A User manual

HZ-3150A
Transformer DC Resistance Tester
USER MANUAL
Huazheng Electric Manufacturing(Baoding) Co.,Ltd

Dear use r:
Thank you for cho os in g HZ-3 15 0A Transfor mer DC Resistance Tester.
We hope that this instrum ent can mak e your wo rk easier an d mo re
enjoyable, so that yo u can get the feeling of offi ce aut omat io n in the test
and ana ly si s work.
Before using the instrument, please read thi s ma nu al, and opera te an d
maintain th e instrum en t according to the manual to prolong its se rvice life.
"Just a lig ht press, the test will be compl eted au to ma tically" is the
operating chara ct eristi cs of this instrum en t.
If you ar e sat isfied wi th th is instrum en t, please tell you r colleagues;
if you ar e not satisfie d with this instrum ent, please call (03 12 ) 6775656 to
tell you to se rve you at all times-Bao di ng Huazheng Elect ri c Manufacturing
Co. , Ltd., our company will def in itely make you sati sf ied !

Contents
I. Introduction................................................................................................................................................... 1
II. Safety Measure........................................................................................................................................... 1
III. Configuration.............................................................................................................................................. 1
IV. Technical Data............................................................................................................................................2
V. Presentation Of The System.................................................................................................................... 2
VI. Test And Operating................................................................................................................................... 3
VII. Caution.......................................................................................................................................................5
VIII. Guarantee and After Sales Service..................................................................................................... 5
IX. Packing List..............................................................................................................................................6

1
I. Introduction
The DC resistance is the transformer’s semi-finished product, finished product test,
installation, commissioning test, and electric part prevention test necessary test project ，the
transformer coil can effectively find the device welding, connecting parts loose, missing unit,
disconnection, and other manufacturing default and other hidden danger occurred after operation.
The DC Resistance transformer to meet fast measurement requirement, we developed
HZ-3150 DC Resistance Tester. The instrument is a new powerful technology, small size, light
weight, high output current and other characteristics.
The device is controlled by the microcontroller, with a high degree of automation, automatic
discharge functions. It is a test instrument of high precision, simple, direct way to achieve fast
transformer measurement.
II. Safety Measure
1. Before using this equipment you must carefully read the manual.
2. The equipment operator should have electric general knowledge .
3. Avoid putting the equipment in the contact of the rain, corrosive gas, dust, high temperature,
direct sunlight, and other places.
4. Severe vibration has to be avoiding for gauges.
5. Only an expert must maintain and adjust the equipment .
6. After the test, the user must wait till the discharge alarm stopped before switching off the device,
and plugging off the test cables.
7. To measure no-load regulating transformers, the user has to wait till the discharge instructions
alarm stops before switching stalls.
8. During testing, do not move the testing clamp and cables.
III. Configuration
1. The device output current high, light weight.
2. Has a complete circuit protection, reliable.
3. Vertical chassis structure, easy operating on field.
4. Discharge alarm, discharge indicator clear, reduces misuse.

2
IV. Technical Data
1、Output current：<5mA、2.5A、5A、10A、20A 、50A
2、Range：40μΩ～400mΩ（50A）100μΩ～1Ω （20A）
500μΩ～2Ω （10A）1mΩ～4Ω （5A）
2mΩ～8Ω (2.5A）10Ω-20KΩ （<5mA 档）
3、Accuracy：0.2%
4、Resolution：0.1μΩ
5、Operating temperature：0~40℃
6、Ambient humidity：≤90%RH，(non condensed)
7、Working power：AC220V±10%，50HZ±1HZ
V. Presentation Of The System
Instrument panel (see the picture):
~220V：Power switch, machine power input, AC socket, safety and switch.
：Earthing pole indicator，use the coat as machine earthing for field protection
V+、V-：Voltage input terminal
I+、I-：Current output terminal
Display：128×64 LCD，English operating
RST：machine restore the initial status，cut off current output.
Circle: select menu.

3
SEL：Setup the current after the tester was reset. press the key for 1-2s to print
VI. Test And Operating
1. Connection ：Connect the testing product to the device through test terminal, joint firm;
meanwhile insure a good connection of the earthing wire.
A. Direct measurement connection (see picture 2) ：
A
B
C
I+
I-
Testing
product
Measurement device
O
V+
V-
a
b
c
B. magnetic assisted connections see picture 3 to 5 （suitable Y（N）-d-11junction group）
A
B
C
I+
I-
Measurement device
O
V+
V-
a
b
c
Testing
product
Pic 3
Pic 2
Pic 4

4
A
B
C
I+
I-
Measurement device
O
V+
V-
a
b
c
Testing
product
A
B
C
I+
I-
Measurement device
O
V+
V-
a
b
c
Testing
product
Picture 3, 4, 5 respectively measure low voltage Rac, Rba, Rcb connection
2. Current options: open the power switch (“I” opens the switch, “O” closes it) meanwhile all the
current values will be displayed on the screen, then user can select key for the test products’
current preferences, each time the user press a key, the cursor will roll between the current value
of <5mA, 1A, 5A, 10A, 30A.
3. Testing:
Time
Data
Current 10A
Pic 5

5
after selecting the current, press START UP to start the test; meanwhile, the gauge will indicate all
the selected current values. When press START UP, few seconds later, it will display
"CHARGING", when it displays "TESTING" that means the “CHARGING” has been completed.
Few seconds after accessing the TEST STATUS it will show the measured resistance values.
(On-screen it will display the selected current value with all the measured resistance values, I = "
" A; R = " " m Ω / Ω).
4. After the test: press "RESET", and winding device will disconnect the power supply, discharge,
alarm, Ammeters back to zero, then restore status, and after the discharge alarm, re-connection,
proceed the next test or unplug the test cable and end the measurement.
VII. Caution
1. During the no-load measurement, before resetting the transformer invert load, wait the
discharge alarm stops, before switching the tap.
2. Wait till the discharge alarm stops before reconnecting wires
3. Before selecting the current, refer to the technical instruction range, don’t exceed or be lower
than the use range. When over passing the range, because the current doesn’t reach the preset
value, the device will stay in “CHARGING” status. In case of lower range, it will display “CURRENT
VERY LOW”，when the two status appear START UP the range, select the suitable current and
carry testing.
4. When using the magnetic assisting method check carefully the range. Because of the high
voltage winding, two parallel and one series, on the device test the circuit adding 1.5 times the
high voltage winding resistance，make the conversion when selecting the range; If over passing
the range, the output current can not reach the setting value or it is not stable.
5. On the magnetic assisting method three cables on the short taps have to be disconnected after
discharge, it may be residual current and tinder discharge, which is normal.
VIII. Guarantee and After Sales Service
The company repairs any problem due to the quality of the equipment for one year from the date
you purchase our product.

6
We provide lifelong maintenance and technology service. If there are abnormalities or faults occur,
please timely contact with us, and then we will arrange convenient and fast disposal and field
service.
IX. Packing List
No.
Item
Qty
1
Main engine
1
2
Red test line
1
3
Black test line
1
4
Power line
1
5
Ground lead
1
6
Fuse pipe
2
7
Print paper
1
8
Test sample（Standard resistance）
1
9
Serial port line
1