UIM UIM-90 User manual

1
UIM-90 (221)
UIM-90 (221/В)
UIM-90 (221/Р)
UIM-90 (221/ВР)
OIL TESTER
UIM-90
USER MANUAL

UIM-90 (221)
UIM-90 (221/В)
UIM-90 (221/Р)
UIM-90 (221/ВР)
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Contents
1 Description and operation .................................................................4
1.1 Purpose of the product .................................................................4
1.2 Technical specifications.................................................................5
1.3 Design and operating....................................................................6
1.4 Marking ........................................................................................ 10
1.5 Packing ......................................................................................... 10
2 Safety requirements ......................................................................... 11
3 Preparation of the Oil tester for first use .......................................... 11
4 Operating procedure.........................................................................13
4.1 Dielectric sample preparation........................................................ 13
4.2 Testing in accordance with the requirements of IEC 60156:2018 ... 13
4.3 Testing in accordance with the custom settings............................. 20
4.4 Additional settings ........................................................................ 23
4.5 Processing of test results............................................................... 25
5 Maintenance..................................................................................... 26
6 Troubleshooting................................................................................27
7 Verification ....................................................................................... 28
8 Transportation and storage .............................................................. 36

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UIM-90 (221/ВР)
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The purpose of the User Manual provides the information on the proper op-
eration of the transformer oil breakdown voltage tester "UIM-90" (hereinafter −
Oil tester) and is the main source of operating instructions.
The User Manual contains information on the purpose, contents, technical
specification, design and operating principle of the Oil tester and its units as well
as its tools, marking, sealing and packaging.
1 Description and operation
1.1 Purpose of the product
1.1.1 The purpose of the Oil tester is measuring the breakdown voltage of
transformer oil and other insulating liquids dielectric in accordance with the
specified algorithm according to the requirements of IEC 60156:2018 (hereinaf-
ter – IEC) or arbitrary custom settings.
1.1.2 The Oil tester can be additionally equipped with:
– built-in Bluetooth adapter*, which is used to connect to a Personal
Computer (hereinafter – PC) to remotely control the Oil tester, save and process
test results;
– built-in thermal printer** to print the report;
– built-in rechargeable battery***.
1.1.3 The Oil tester is portable equipment.
* - for models UIM-90 (221/В); UIM-90 (221/ВР)
** - for models UIM-90 (221/Р); UIM-90 (221/ВР)
***
- for models UIM-90 (221); UIM-90 (221/В); UIM-90 (221/Р);UIM-90 (221/ВР)

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1.2 Technical specifications
1.2.1 The main technical characteristics of the Oil tester:
Type Value
1 Range of testing voltage (rms value), kV from 10 to 90
2 Relative voltage measurement error, % 3
3 Volume of measuring cell, cm3, min 400
4 Operating alternating voltage, V 220 10
5 Power supply frequency, Hz 50/60
6 Power consumption, kV×A, max 0,1
7 Weight, kg, max 28
8 Dimensions, mm, min 520×335×320
1.2.2 Duration of continuous work of the Oil tester is 8 hours.
1.2.3 Oil tester operates, retaining its design and parameters during and af-
ter exposure to external influencing factors:
Extreme values of factors
Extreme conditions
External influencing factor Operating
conditions Transporta-
tion Storage
1 Ambient temperature, °C
– lower value
– upper value
+15
+30
–25*
+55
–25*
+55
2 Relative humidity, %
– lower value
– upper value
10
75
10
100
10
100
3 Atmospheric pressure, kPa
– lower value
– upper value
70
106
70
106
70
106
4 Shockproof on multiple shocks
– peak shock acceleration, m×sec-2
– duration of shock acceleration, ms
– quantity of shocks, pcs.
–
30
1
80-120
–
* Turning on the Oil tester after a long stay at a temperature below 5°C is allowed after pre-
exposure for 4 hours at a temperature from +15°C to +30°C

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UIM-90 (221/Р)
UIM-90 (221/ВР)
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1.3 Design and operating
General view of the Oil tester
– test compartment lid
– cell
– decorative caps
– high-voltage terminals
– Control panel of the Oil tester
– built-in thermal printer
– electrodes
– stirring device
– test compartment
– high-voltage stand
– grounding wire
– reference caliber
– Remote control
– activating rod
– power supply cable
Control panel of the Oil tester
– power switch
– green LED indication of switching on the Oil tester
– red LED indicator, which indicates high voltage supply
– LCD display
– test run button
– test stop button
– test results view button
– surge pause button
Remote control
– test run button
– test stop button
– surge pause button
Rear panel of the Oil tester
– socket 220 V for connecting network power supply cable with the Oil tester
– fuse 2A
– clamp for connecting grounding wire
– marking plate

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General view of the Oil tester
Control panel
Remote control
Rear panel

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1.3.1 Contents of the Oil tester:
Models the UIM-90
Name Qty
221 221/В 221/Р 221/ВР
High-voltage stand 1 ●
Power supply cable 1 ●
Grounding wire 1 ●
Cell 1 ●
Partially spherical electrodes 2 ●
Activating rod 1 ●
Reference caliber 1 ●
Stick for manual stirring 1 ●
Remote control 1 ●
Jumper 1 ●
Fuse 2A 1 ●
Round wrench 1 ●
Bluetooth adapter 1 – ● – ●
Software flash drive "VirtualUIM" 1 – ● – ●
Software User Manual "VirtualUIM" 1 – ● – ●
Built-in thermal printer 1 – – ● ●
Paper roll (57 mm×17 m) 2 – – ● ●
User Manual 1 ●
Transportation crate 1 ●

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1.3.2 The Oil tester consists of a high-voltage stand , which is connected to
the power network by a cable and to the protective grounding of the network by
a grounding wire . There is a test compartment in the high-voltage stand,
which is closed with a lid , connected with the lock, preventing the high voltage
supply when it is opened.
Under the test compartment there is a generator unit filled with trans-
former oil. To control the level of transformer oil and, if necessary, topping it,
plugs under decorative caps are located on the cover of the generator unit.
Test voltage from the generator unit is output by means of two high-
voltage terminals on which the cell is installed. To control the gap
between the electrodes in the cell, a reference caliber is used.
At the bottom of the test compartment under the cell is installed a stirring
device for stirring of liquid dielectrics with the activating rod .
Models UIM-90 (221/P) and UIM-90 (221/BP) have an built-in thermal printer .
To the left of test compartment there is a Control panel the Oil tester .
1.3.3 A Remote control is used to perform work on verification of the Oil
tester (primary or periodic).
Assignment of buttons , и on the Remote control duplicates the
action of similar buttons , и on the Control Panel.
OPERATING THE OIL TESTER WITH A FAULTY BLOCKINGS PROHIBITED!

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1.4 Marking
1.4.1 The Oil tester has following markings:
– model name;
– serial number;
– manufacturing date.
1.4.2 The plate with markings located on the Rear panel of the Oil tester.
1.5 Packing
1.5.1 The Oil tester is packaged in transportation crate, which prevents
socks and damages during transportation and storage.
1.5.2 Before packing the Oil tester in the transportation crate be sure that
generator plugs are closed properly in order to prevent transformer oil leakage.
1.5.3 User Manual is wrapped along with the Oil tester inside the transpor-
tation crate.

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2.1 General requirements
2.1.1 Workplace of service personnel must comply with the fire safety
requirements.
2.1.2 The insulation resistance of power circuits, with respect to the case of
the Oil tester must not be less than 2 MOhm.
2.2 Safety precautions during preparation and operation of the Oil tester
2.2.1 The Oil tester is to be operated by electrotechnical staff of at least
two persons over 18 years old, who are allowed to operate devices with voltage
over 1000 V, who have undergone a medical check-up as well as briefing on la-
bour and health protection.
2.2.2 When operating Oil tester the case must be grounded with grounding wire.
3 Preparation of the Oil tester for first use
3.1 Preparation of the Oil tester
When preparing the Oil tester for the first use it is necessary to:
а) take the Oil tester out of the transportation crate;
b) wipe the cover generator unit, the high-voltage terminals, the cell, the
electrodes and the reference caliber with similar liquid and then again with clean
dry serviette. Operating surfaces of reference caliber must be clean and smooth
without nicks and dents;
c) check the transformer oil level in generator unit. Its level must be 4-8 mm
lower the cover of generator unit.
If you need to refilling the transformer oil, proceed as follows:
– unscrew the decorative cap and plug on the cover of the generator unit;
– fill up in transformer oil with breakdown voltage more than 45 kV;
– screw in the plug and decorative cap;
2
Safety requirements

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d) check the position of power switch . It must be in "О" position;
e) connect the clamp to a protective grounding using grounding wire.
OPERATING WITHOUT GROUNDING IS PROHIBITED!
f) connect the power supply cable to a socket 220 V on the Rear panel of
the Oil tester (in case of mains operation).
Check the battery charge (when operating from the built-in battery). If
necessary, connect the power cable to the 220 V socket on the rear panel of
the Oil tester, connect it to the mains and set the power switch in position
"I" and charge the built-in battery.
3.2 Preparation of the cell
When preparing a cell for the first use it is necessary to:
a) treat the cell with a suitable solvent to remove all residues of the
previous liquid;
b) rinse with clean dehydrated liquid of the type to be tested, drain and fill again;
c) check the gap between the electrodes in the cell. If the working surface
of the reference caliber " " passes freely in the gap, and the working surface
" " does not pass, the gap is set correctly. Otherwise it is necessary to adjust
the gap by shifting the electrodes with wrench 11×14 and round wrench.

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4.1 Dielectric sample preparation
When preparing a liquid dielectric sample for testing, it is necessary to:
a) fill one jar from the container for storage sample of liquid dielectric;
b) the cell should be prepared according to section 3.2, steps (a) and (b),
after long storage, when the type of liquid dielectric to be tested is changed or
after testing of a highly contaminated liquid dielectric;
c) immediately before filling the test cell, the sample container is gently
agitated and turned over several times in such a way as to ensure, as far as
possible, a homogeneous distribution of the impurities contained in the liquid
without causing the formation of air bubbles.
Equilibrate the sample to room temperature.
4.2 Testing in accordance with the requirements of IEC 60156:2018
For testing in accordance with the requirements of IEC it is necessary to:
a) plug power supply cable from the network socket;
At the first switching on of the Oil tester, the following testing parame-
ters are set:
– main:
Number of breakdowns N, pcs. 6
Automatic stirring ON
Settling time after filling the cell Tsf, sec 600
Settling time after breakdown Тsb, sec 300
4
Operating procedure

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– additional, not regulated by IEC (their change does not affect the
settings in accordance with the requirements of IEC):
On subsequent switching operation, the Oil tester operates with the
latest saved test parameters;
b) set the power switch in position "І". Green LED indicator must
light up in green. The LCD display will show one of these screenshots:
1) in case of absence of
mounted cell;
2) in case of opened lid on test
compartment;
3) both 1 and 2;
c) mount the cell with insulating liquid dielectric on high-voltage termi-
nals inside the test compartment. Immerse activating rod to the bottom of the
cell. Close test compartment lid. The LCD display will indicate following:
;
* - for models UIM-90 (221/В); UIM-90 (221/ВР)
**
- for models UIM-90 (221/P); UIM-90 (221/ВР)
P
- icon of built-in thermal printer, displayed on models UIM-90 (221/P); UIM-90 (221/BP)
- icon to connect the Oil tester to the network when the built-in battery is available
- charge level icon if there is a built-in battery
Stirring time Ts, sec 10
Stirring speed ⅔
Bluetooth* OFF
Printing** ON
Type of electrodes PART. SPHER.

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d) press and release button , the LCD display will show:
,
after which a warning will appear and a red LED indicator will light up:
,
and then inscription U[1]= ХХ.Х kV, where XX.X – changing value of breakdown
voltage. The Oil tester will perform testing in automatic mode according to IEC;
If the value of the applied voltage exceeds 90 kV, the voltage rise will stop
and a message will appear on the LCD display:
.
After the button is pressed, the LCD display will show the READY.
e) after the end of the test, the results are automatically printed out on
the built-in thermal printer** (if the parameter "Printing" is set to ON), and the
LCD display will show:
.
The report includes:
– model of the Oil tester;
– serial number;
– report number;
– test date and time;
* - for models UIM-90 (221/В); UIM-90 (221/ВР)

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– operating mode;
– sample number;
– type and temperature of the liquid dielectric (in the test cell);
– type of electrodes used;
– automatic stirring (ON/OFF);
– the result of the test (the value of each individual breakdown in kilo-
volts, mean breakdown value Ubrk. in kilovolts, standard error value u and the
coefficient of variation V, %).
After the report is printed out, the LCD display will show the test results:
.
If coefficient of variation V does not exceed 20 %, then test results are
considered reliable, and LCD display will show the READY.
In the case when the coefficient of variation V exceeds 20 %, a message
will appear on the LSD display:
.
If there is no need to repeat the test, press and release the button , the
LCD display will show the test results, otherwise press and release the button ,
the LCD display will show:
.

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Open the test compartment lid, remove the cell and replace the sample
of liquid dielectric, taken from the same container as the previous sample, set
the cell, close the lid and press the button . Oil tester will perform additional
set number of breakdown tests and calculate the mean breakdown value Ubrk.,
standard error value u and the coefficient of variation V;
g) to view the test results it is necessary to:
– press and release button , the LCD display will show following info:
1 – date of test;
2 – end time of test;
3 – number of tests;
4 – number of breakdowns;

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– to view all other results press and release buttons or , the LCD
display will show following info:
5 – mean breakdown value Ubrk..;
6 – standard error value u;
7 – coefficient of variation V;
8 – values of breakdown voltages U[1] – U[6] respectively;
9 – printing test results*;
* - for models UIM-90 (221/P); UIM-90 (221/ВР)

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g) to print the test results on the built-in thermal printer* (if necessary)
press and release the button , the LCD display will show:
;
h) to finish viewing the test results, press and release the button ;
i) open the test compartment lid, remove the cell;
j) to conduct the next test, prepare the sample in according to paragraph 4.1
and repeat steps (c) to (i) of paragraph 4.2.
If the tests are complete, close the test compartment lid. Set power
switch in position "О", green LED indicator will turn off. Unplug power
supply cable from the network socket (in case of mains operation).
* - for models UIM-90 (221/P); UIM-90 (221/ВР)

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4.3 Testing in accordance with the custom settings
To perform the test according to the custom settings it is necessary to:
a) repeat steps (b) and (c) of paragraph 4.2;
b) set required parameters:
– simultaneously press and hold pressed (till the sound beep) buttons
and ;
– to select the appropriate parameter, press and release the button or
. To change the appropriate parameter, press and release the button or :
Parameter Range of
values Leap Information displayed on
the LCD display
Number of breakdowns N, pcs. 1 – 20 1
Automatic stirring ON/OFF –
Stirring time Ts, sec 10 – 1000 10
Stirring speed ⅓; ⅔; 1 ⅓
Settling time after filling the cell
Tsf, sec 0 – 1200 60
Settling time after breakdown
Тsb, sec 0 – 1200 60

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To save the settings, simultaneously press and hold pressed (till the
sound beep) buttons and , a message will appear on the LSD display:
,
– press and release button – if "YES" or button – if "NO". The
LCD display will show following:
.
Press and release button , the LCD display will show (if parameter
"Tsf =" set is greater than zero):
,
after which a warning will appear and a red LED indicator will light up:
,
and then inscription U[1]= ХХ.Х kV, where XX.X – changing value of breakdown
voltage. The Oil tester will perform the test in accordance with preset settings.
If the value of the applied voltage exceeds 90 kV, the voltage rise will
stop and a message will appear on the LED display:
.
After the button is pressed, LCD display will show the READY;
This manual suits for next models
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Table of contents