The document describes the CMM-6D transformer oil purification plant. The plant removes particulate matter and purifies oil from water and gas through degassing, drying, filtration, and heating. It processes 2-6 cubic meters per hour of oil and can heat oil to 90°C. The self-contained unit is installed on a trailer and operated via an automatic control system and touchscreen interface.

1. Sales Manager
Globecore GmbH
Edewechter Landstraße 173,
Oldenburg-Eversten,
Deutschland, 26131
Tel: +49 4484 202 35 91
Email:
chyk@globecore.de
Skype: mg2globecore_de
www.oilregeneration.globecore.com
GlobeCore CMM-6D Transformer Oil Purification Plant
The CMM-6D degassing unit is designed for removal of particulate matter
as well as heat and vacuum purification of electric insulating and turbine oils
from water and gas.
The unit is intended for use during installation, repairs and operation of oil-
filled high voltage equipment up to 1150 kV (power transformers, high voltage
switches etc).
For indoor operation, ensure exhaust of removed gases into the atmosphere
via piping.

2. Specifications
Note - * initial oil parameters:
- volumetric gas content – below 10.5%
- mass weight content – below 0.01% (100ppm)
- temperature– above 0 ºС.
Description of the unit
The unit is a self-contained unit with all assemblies and
components in the container. The container is installed on a trailer.
Side walls of the container feature doors for simple access and
ventilation. A compartment for tools and accessories is attached to the
side wall of the unit; the compartment also contains drums with power
cable and oil hoses.
Parameters Value
1 Processing capacity, m3
/hour
- degassing, drying and filtration mode 2-6
- filtration and heating mode 2-6
2* Processed oil parameters:
- max volumetric gas content, % 0,5
- max weight content of water, ppm 5.0
- filtration fineness, micron 0,5
3 Max oil heater output temperature, ºС 90
4 Max output pressure, MPa 0.35
5 Oil heater power, kW 142
6 Max power consumption, kW 150
7 Max residual pressure in the vacuum chamber during degassing,
mbar
10
8 Max residual pressure in the vacuum chamber during air
tightness test, mbar
5
9 Max air inflow during vacuum test in 1 hour, mbar 10
10 Power supply
- voltage, V 400
- AC 3-ph frequency, Hz 50
11 Dimensions, mm max
- length 3700
- width 1750
- height 2320
12 Weight, kg, max 2250

3. The unit consists of the vacuum chamber 1, oil pump 2, metal body 3, pre-
filter 4, fine filters 5, oil trap 6, oil heater 7, piping with valves, vacuum pump
section and the control cabinet 8.
Unit general view
Figure 1.2
The vacuum pump section is an assembly of two vacuum rotary vane pumps
9. The section is connected to the vacuum chamber (1) and trap (6) via
vacuum line 11 with cutoff valve 12. Pump exhausts are connected to
collector 13 and lead out to the back wall of the container.

4. Unit general view
Рисунок 1.3
Tool and accessory compartment 10 is attached in the side of the container,
containing cables and hoses. The vacuum chamber can be cut off from the oil
pump with disk gate 14. Oil supply collector 15 and oil outlet collector 16 are
located next to each other.
Parameters are controlled by: ТСМ type thermistors, thermostat, flow relay,
pressure and vacuum sensors, level sensors and oil flow meter/totalizer.
Pre-filter (mesh) 4 installed at the inlet to remove particulate matter from
the oil. Fineness of filtration is defined by 200 micron brass mesh installed in
the case. To rinse the filter element, the filter is removed from the case and
rinsed in clean transformer oil.
The oil pump 2 removes oil from the vacuum chamber. The pump is
controlled from the control panel.
Fine filters 5 (figure 2) are installed for filtration of the processed oil with 1
micron fineness. For general view of the filter refer to Figure 2.

5. The filter consists of lid and body supporting the filter element. The lid
features a valve designed to remove air from the filter when filling with oil and
to let the air in when the oil exits the filter. A tap is installed in the lower part
of the body. Oil inlet and outlet are welded into the body, as well as connectors
for pressure sensors to indicate pressure before and after the filter element
and the pressure drop.
To replace the filter element, drain contaminants from the cartridge filter by
opening the valve 7. Unscrew the bolts on the lid 2 and remove it from the
filter, unscrew the hold down nut, remove filter element. Install new filter
element, secure it with the hold down nut. Install the lid and secure with bolts.
The oil heater 7 (figure 3) is a cylinder with installed pipes with ceramic
heating elements, inlet and outlet. For general view of the heater, refer to
figure 3.
Figure 2 Fine filter
1 – body;
2 – lid;
3 – oil inlet;
4 – clean oil outlet;
5 – pressure sensor before filter;
6 – pressure sensor after filter;
7 – contaminant drain valve;
8 – air release valve

6. Heater operates in three equal stages.
The device is managed from the control panel separately for each section. Oil
temperature after the heater is controlled with the help of the temperature
sensor (thermistor).
The heater is also equipped with a thermostat TS for additional control.
The body of the heater features a connector with a relief valve to prevent
critical overpressure in the heater. The valve outlet is connected to the vacuum
chamber.
The vacuum chamber 1 (Figure 4) is designed for removal of gas from the
transformer oil. It consists of body 1, degasser lid 2, sight glass 3 for oil level
monitoring. Ball valve 10 allows for air inlet. For general view of the chamber
refer to figure 4.
Figure 3 Oil heater
1 – heater body; 2 – pipes for installation of heating elements;
3 – ceramic heating element; 4 – inlet; 5 – outlet;
6 – защитный кожух; 7 – сальники электрокабеля; 8 – термосопротивление;
9 - термостат

7. Figure 4 Vacuum chamber
1 – body; 2 – degasser lid; 3 – sight glass and light;
4 – oil inlet; 5 – oil outlet;
6 – vacuum system connector; 7 – foam sensor; 8 – level sensor;
9 – vacuum sensor; 10 – drain valve; 11 – float stop valve
Oil trap (figure 6) is connected to the chamber to connector (6), in turn
connected to the vacuum valve; the chamber includes foam sensor LS2 LS2
(7) and level indicator (8) LS1. During degassing of the transformer oil in the
vacuum chamber, the residual pressure is maintained at or below 50 mbar.
The oil flows into the column via piping (inlet 4) and then through the float
stop valve (11) to oil collector and to oil degasser. Due to the design, the oil
intensively emits gas and moisture.
Process oil exits the chamber through outlet (5) in the lower part of the body.
The oil trap 6 (figure 5) is designed to prevent oil from entering the vacuum
system. For general view of the trap refer to figure 5. The trap is a metal
cylinder 1 with welded connectors to the vacuum chamber 2 and to the
vacuum valve 3; the device features oil indicator 4, oil presence sensor 5 and
vacuum system depressurization valve 6.

8. Automatic control system
The automatic control system (ACS) consists of the control cabinet (CC),
containing communication and control systems for the pumps, the heater and
the electromagnetic valves. The front panel of the CC features a touchscreen
HID, allowing the operator to control and manage the operation of the unitm
as well as indicator lights for electric power and emergency stop button (Fig.
6).
Figure 5 Oil trap
1 – body;
2 – vacuum chamber connection;
3 – vacuum collector connection;
4 – oil indicator;
5 – oil level sensor;
6 – electromagnetic valve

9. Figure 6 – Control cabinet front panel
The following elements are shown in Fig.6: 1 – touch screen (HID); 2 – power
light; 3 – correct phasing light; 4 – emergency stop button; 5 – main switch
handle.
The control panel contains protection and communication systems, touch
screen, controllers, to which sensors are connected, and actuator controls.
Control instruments.
The unit’s operation is controlled by VIPA controller and the following
instruments:
- Contamination of filter elements F1, F2 and outlet pressure are shown by
pressure sensors DG1 – DG4;
- vacuum is controlled by vacuum sensor DG5;
- oil level and foaming in the vacuum chamber are controlled by level sensors
LS1 – LS3;
- pressure in the inlet line before the heater is controlled by pressure sensor
DG6 and pressure and vacuum gauge М1;
- processing flowrate is indicated by LC flowmeter;
Heater is controlled by the following instruments:
- thermostat TS – disengages the heater when the oil temperature is above the
setting;
- flow relay FS – disengages the heater when no oil flows through;
- temperature of the processed oil at the outlet of the heater is managed by
the controller.
The vacuum system features two vacuum pumps designed to create the
required vacuum in the vacuum chamber.
The vacuum pumps are connected to the oil trap through a valve and
sylphonic compensators.
The container shelters the components and assemblies form the weather.
Lifting facilities are installed on the container.

10. rinciple of operation.
The flow diagram is shown in figure 7.
Figure 7 – Flow diagram
The unit operates in one of the following modes:
- «MANUAL MODE»;
- «HEATING FILTRATION MODE» - transfer of oil with heating and filtration;
- «DEGASING MODE»;
- «VACUUM MODE» vacuum evacuation of other equipment;
- «OUT VACUUM MODE» - simultaneous degassing and vacuum evacuation of
other equipment.
Visualization and control software description
The operator panel features visualization system for unit control. The program
is started automatically when the control panel is powered. Figure 8 shows the
start screen of the program.

11. Figure 8 - Start screen of control software
- «PROCESS CONTROL» – main screen of operation visualization
- «SETTINGS CONTROL» - parameter settings screen
- «ALARM CONTROL» - fault and alarm screen
- «SYSTEM CONTROL» - devices and sensors screen
- «EXIT» - exit the visualization program (to return, press «Movicon» button).
Sample screens
«PROCESS CONTROL» screen
The screen shows a diagram of all elements and parameters of the unit (as per
the icons in the flow diagram).
WARRANTY: GlobeCore warrants the machinery supplied under this
specification against defects in material and workmanship under normal use and
service for a period of 12 months from date of shipment.