Huazheng HZJZ-200V User manual

HZJZ-200V
Transformer Ratio Standard
Tester
Huazheng Electric Manufacturing (Baoding) Co., Ltd

Dear use r:
Thank you for choosin g HZJZ-200V Tra ns former Ra tio Standar d Tes ter.
We hop e that this instrume nt can make your wo rk easier and more
enjo yable, so that you can get the fe el in g of office automation in the te st
and an al ysis work.
Be fore using the instrument, please read this man ua l, and ope rate and
maintain the instrum ent accordi ng to the manual to pr olong its servi ce li fe .
"Just a lig ht pr es s, the tes t will be co mp le ted au tomatically" is th e
oper at ing cha racteristics of thi s instrument.
If you ar e satisfi ed with this instrume nt, pl ea se tell your colleagues;
if you ar e not satisfi ed wi th this ins trum ent, please ca ll [phone] to
te ll you to serve yo u at all times-Bao di ng Huazheng El ec tric Man ufacturing
Co. , Lt d., our company will de finite ly ma ke you satis fied !

Contents
I. Overview...................................................................................................................................1
II.Technical parameters...................................................................................................1
III. Working principle................................................................................................................ 1
IV. Operating instructions....................................................................................................... 2
V. Precautions for use..................................................................................................................4
VI. After sales service.................................................................................................................. 5

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I. Overview
1. HZJZ-200V transformer ratio standard tester, also known as power frequency
induction voltage divider, is a ratio conversion device composed of three
interconnected transformers. Through switch switching, the output voltage of the
device is equal to a proportional value of the input voltage.It has the advantages of
accurate voltage ratio, stability and universal ratio.In addition, the equipment also has
the characteristics of high input impedance and low output impedance, which
provides important performance for accurate electrical measurement. It is widely
used in various measurement lines and devices such as electric power, detection, oil
field, railway, school, mine energy and so on.
II.Technical parameters
1. Environmental conditions
Temperature: 20 ±5℃
Relative humidity: < 80%
Altitude: < 1000M
Interfere: No strong electromagnetic field interference source and vibration
2. Power conditions
Frequency: 50 ±0.5Hz
Input voltage distortion coefficient is less than: 5%
3. Performance index
Primary voltage: 200V
Secondary voltage: 0 ~ 200V
Rated load: 0VA
Accuracy class: 0.002
Proportional uncertainty: 3×10-6
Weight: 10kg

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III. Working principle
The equipment is designed by using the two-stage transformer with the highest
accuracy, which overcomes the disadvantage that the rear plate of parallel multi plate
induction voltage divider has a great impact on the load of the front plate and the
disadvantage that the series type increases an isolation error and the input impedance is
not high.The schematic diagram of two-stage transformer type multi disk induction voltage
divider is shown on the following pageIt can be seen from the figure that the multi disk
inductive voltage divider is composed of multiple two-stage inductive voltage dividers in
parallel. The 1 / 10 section of the previous stage proportional winding connects a section
of voltage to both ends of the next stage proportional winding through the double pole
switch, forcing the next disk to be 1 / 10 of the voltage of the previous disk.Due to the
excitation winding, the next disk is divided into the front disk
2. The circuit has little influence and eliminates the isolation error, so it can obtain high
accuracy.

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.
IV、Operating instructions
The inductive voltage divider is mainly used in two states: as a voltage divider and
as a voltage proportionerThe two usage states are described below.
1.Use inductive voltage divider to calibrate voltage transformer (used as voltage divider)
When using the inductive voltage divider to calibrate the voltage transformer, connect
the line according to the above figure. Generally, the standard error of the inductive
voltage divider relative to the accuracy of the tested voltage transformer can be ignored.
The indication value of the tested voltage transformer can be directly read out from the
voltage transformer calibrator, and the error of the tested transformer can be calculated
after conversion to one time.If the primary voltage of the tested voltage transformer

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exceeds 200V, the transformer with two accuracy levels higher than the tested voltage
transformer can be used for transformation, and then the induced voltage divider can be
used for voltage division to measure the error of the tested induced voltage divider.
2. Measuring circuit for voltage proportional standard
This is the line often used by the transformer ratio bridge. At this time, the voltage
ratio has nothing to do with the load, so it has high accuracy.When calibrating the voltage
transformer calibrator, this line can be used to obtain the in-phase component value with
high accuracy, and the residual orthogonal component will be very small.
V.Precautions for use
1.The grounding of the instrument and the cabinet shall be reliable.
2.When in use, do not switch the range under full voltage, at least lower than 100V,
and then switch.
3. If the output voltage error is found to be too large, check whether the wiring is
correct, whether the fuse tube has been burned out, whether the position of the indicator
panel is accurate, find out the cause and take necessary measures before retesting.
4. In order to ensure the measurement accuracy, the inductive voltage divider shall
not be loaded when in use.
5. The induction voltage divider is a high-precision equipment. When verifying the

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induction voltage divider, pay attention to the change of the environment and do not
exceed the allowable range.
6. The instrument shall be protected against shock, moisture, corrosion and cleaning.
VI. After sales service
The quality of the complete set of equipment provided by our company meets our
enterprise standards and relevant national standards.During the first use, free on-site
guidance, responsible for commissioning and performance acceptance;
All users who purchase this instrument enjoy the following after-sales services:
1. Within three months from the date of sale of the instrument, if there are quality
problems, our company will replace the new instrument free of charge, but the user
cannot dismantle the machine by himself.
2. Any quality problem of the instrument within one year shall be repaired by our
company free of charge.
3. If the instrument has been used for more than one year, our company is
responsible for long-term maintenance and appropriately charging material fees.
4. If the instrument fails, please ask our full-time maintenance technicians or send it
back to our company for repair. Do not disassemble the instrument by yourself, otherwise
our company will not be responsible for self damage.