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GlobeCore CMM (UVM) 10,0 A

Mobile Transformer Oil Purification Plant with High Vacuum

GlobeCore CMM (UVM) 10,0 A

CMM-10.0 A (UVM) designed for vacuum evacuation of transformers, removal of solids,

moisture and gas from electric insulation oils with viscosity below 70 cSt at 50С.

The unit is to be used for installation, repairs and operation of oil filled high voltage

equipment (power transformer, high voltage switches etc).

Globecore GmbH

Edewechter Landstraße 173,

Oldenburg-Eversten,

Deutschland, 26131

Tel: +49 4484 202 35 91

Email: chyk@globecore.de

Skype: mg2globecore_de

Production capacity of CMM-10.0 A (UVM) is 10000 L/H in Thermo-Vacuum

Mode and 15000 l/h in Heating and Filtration Mode. Allowing to process up to 360000

L of transformer oil per day and provide:

• Removal of Water from 100 ppm down to 10 ppm and from 50 ppm to 5

ppm in a single pass and down to 3 ppm after 3 passes (ASTM method D-1533).

• Reduction of Gas content from fully saturated with air (10 to 12% by

volume) to less than 0.1% (ASTM D-2945) in a single pass.

• Removal of Particulate Matter to 5,0 microns

• Improvement in dielectric strength up to 70 kV.

Technical parameters

Parameter Value

Max processing rate, m3/hour

- degassing, drying and filtration mode 10

- heating and filtration mode 15

* Parameters of processed oil:

- max gas content, % volume 0,1

- max moisture content, ppm 5

- ISO 4406 industrial purity class 9

Max oil output temperature in heating mode, ºС 90

Output pressure, MPa 0,2

Max oil heater power, kW 174

Max power consumption, kW 205

Residual pressure in the vacuum chamber during degassing, max Pa 267

Residual pressure in the vacuum chamber during air tightness test, max Pa 26,7

Air leak into the vacuum system in 1 hour during air tightness test, max Pa 267

Electric power

- voltage, V 380

- AC frequency, Hz 50

Dimensions, mm (without trailer)

- length 2795

- height 1805

- width 1600

Max weight, kg 2400

* Note - initial oil parameters:

- gas volume content – below 10.5%; - moisture content – below 0,01% (100 ppm); - temperature – above 0 ºС.

Unit design

The unit is built on a frame with lockable doors and contains the following: 1. frame;

2. centrifugal oil supply pump; 3. centrifugal oil output pump;

4. vacuum booster pump; 5. backing pump; 6. electric control cabinet;

7. vacuum chamber; 8. oil heater;

9. filters; 10. oil trap;

11. piping; 12. control panel;

13. oil outlet; 14. oil inlet;

Principle of operation.

Unit operates in the following modes:

Oil degassing

In this mode pump P1 carries oil through filter F1, heater H to vacuum chamber VC1. To leave the unit, oil is sucked from the vacuum chamber by pump P2 and passes through filter

F2 to outlet. Pumps VP1, VP2, VP3 and BOOSTER create high vacuum in chamber VC

While oil passes through the chamber, air and moisture are removed. This mode enables oil filtration, drying and degassing.

Transformer heating;

In this mode supply pump P1 transfers oil through filter F1, heater H and filter F2 to outlet. This mode enables oil heating and filtration, as well as heating and filtration of transformer

windings.

Transformer vacuum evacuation;

In this mode pumps VP1, VP2, VP3, BOOSTER pull vacuum on transformer.

Flow diagram

Designation Item Purpose View

P1 Oil centrifugal pump NCG – 12.5,

30 m3/h, 65 m, 7.5 kW

Supply

Supplies oil to the unit.

P2

Oil centrifugal pump NCG – 12.5,

30 m3/h, 65 m, 7.5 kW

Output

Discharges oil out of the unit.

BOOSTER Roots booster pump ZJ 600,

2160m3/h, 7.5 kW Produces vacuum of 500-0.1 Pa.

VP1, VP1, VP3 Vacuum backing pump CP40- 260,

100 m3/h, 3 kW Produces vacuum of 101300-500 Pа.

MF1

Preliminary mesh filter

200 µm, magnetic mesh strainer, equipped with magnets, oil level

sensor and drain valve. Easy to maintain and clean.

Preliminary mesh filter the oil.

-

F1, F2 Fine filter – 5 µm polypropylene filters.

Filter the oil.

НB

3 sections oil heaters. Each section

with a separate switch to allow to turn each section on and off independently.

Heats the oil.

VС1 Vacuum chamber Degasses and dries

transformer oil.

V1, V2 Angle valves

V1 prevents vacuum chamber from

sucking the oil.

V2 controls oil level in chamber.

MV1 –MV10, MV14 –MV17,

19, MV21 – MV25

Ball valves Stop and redirect

liquid flows.

MV18 Vacuum valve Vacuum system shutoff.

MF1, MF2 Mesh filter Stops large particles

T Thermistor Oil temperature

control

TS Thermostat Controls temperature.

FW Flow relay Controls the flow to turn heating on.

М1-М5 Pressure gauge Controls pressure.

VG1 Vacuum sensor Controls vacuum in vacuum chamber and in vacuum system

V11 Solenoid valve

Admits air to the

vacuum system in emergencies.

LS1-LS5 Oil level sensors Indicate oil level

LS6 Tray oil level sensor Stops the plant if oil

leakages are detected.

LF Foam sensor Indicates foaming and reduces vacuum through valve EK

R Oil trap Oil vapor condensation

-

LA Light Vacuum chamber sight glass lighting

-

MS1 Moisture sensor

Shows moisture

content of oil at unit inlet and outlet

-

Electric diagram description.

Control cabinet.

Pos Designation on

control cabinet Title/purpose

Designation on

flow diagram

Designation on

mnemonic diagram

1. Mnemonic diagram

2. Controller display

3. OUPLET PUMP Start/stop button of

outlet pump P2 P2

4. INLET PUMP Start/stop button of inlet

pump P1 P1

5. VACUUM VPI Start/stop button of

backing pump VP1 VP1

6. VACUUM VP2 Start/stop button of

backing pump VP2 VP2

7 VACUUM VP3 Start/stop button of

backing pump VP3 VP3

8. BOOSTER Vacuum pump start/stop

button BOOSTER BOOSTER

9. VACUUM

DISCHARGE

Control switch of

vacuum discharge valve V11

10. HEATING Heater section switches

Heating I, II,

III

11. Vacuum gauge Remote vacuum gauge VG

12. PHASING Correct phase sequence

light;

13. Main switch

14. ALARM OFF Sound alarm reset

button;

15. EMERGENCY STOP Emergency stop button.

16. CHEСK Indication test button;

17. HEATING SWITCH Heater disengage button;

The unit is powered by three phase 380V, 50Hz no neutral. The power cable enters the

control cabinet through an opening in the upper part and is connected to the terminals of the input switch with handle on the front panel of the control cabinet, which allows protection of the operator from possible electric shock when opening energized control cabinet.

Recommended wire cross section is 4*185 mm. Phase connection is controlled by phase control relay. In case of incorrect phase connection, the PHASING light will be off on the

front panel of the control cabinet. In this case swap phase wires, after correct connection, the green PHASING will be on, signaling power is available to the control cabinet.

The vacuum system and inlet/outlet pump drive motors (М1,М2,М3,М4,М5,М6), are connected to the three phase 380V circuit. The M1 – M6 drives are controlled by magnetic

starters KM1 – KM6. The drive power circuit is additionally protected by hot-wire relays KK1 – KK6. Heating sections EK1 – EK9 are connected through magnetic starters KM7 –

KM9. The control circuit is powered by the secondary winding of isolation transformer T1.

The secondary winding is protected by automatic breaker F11. The primary winding is protected by breaker F10. The emergency stop button is built into the electric circuit so as to disconnect all actuators,

while indication devices are powered off by turning the main switch handle. A ventilation fan is installed in the control cabinet. At a certain temperature limit, heat relay

t* trips and starts the fan to cool the electric control cabinet. A counter of operation hours PT1 is connected in parallel to the primary control system.

Level sensors LS1 – LS5, flow switch, tray oil level LS6, Mitsubishi U2 vontroller and vacuum chamber light are powered by static power supply unit V1 220V АС/24V DC.

The vacuum gauge U6 is powered by secondary winding of 220 VAC transformer. Vacuum pumps and inlet/outlet pumps are started and stopped by buttons on the control

panel. Heaters are engaged by pressing the corresponding buttons on the front panel of the

control cabinet. Heating section operation is managed by measuring regulators according to program. Heaters can be disengaged by pressing the emergency stop button.

An abnormal situation stops all started actuators, triggers sound alarm, and the controller on the control cabinet shows fault message. Sound alarm can be reset by pressing the red ALARM OFF button. In abnormal situations refer to the mnemonic diagram, where a red

LED will indicate the location of the problem. Operation may only be resumed after resolving the situation. Pressing the ALARM OFF button clears the emergency from the

controller screen only if the fault signal has been removed. If oil is spilled into the tray, the float sensor LS6 trips, stopping all actuators. The controller

screen will display “ALARM LS6” and siren will sound. After clearing “ALARM OFF” the cause of the emergency must be cleared.

Possible reasons for emergency stops and operation logic:

OIL IN RECEIVER – triggered by LS5 sensor signal. When triggered, the unit

stops immediately, vacuum release valve opens. EMERGENCY lamp and the LED on the

mnemonic diagram come on, ALARM is sounded. The sound alarm may be reset by pressing

the button on the control panel ,but the red lamp and LED on the diagram remain on.

Operation may be resumed after the situation is rectified, the valve will close after the LS5

signal is off.

OVERHEATING – triggered by thermostat signal. The signal stops the unit

immediately, vacuum release valve opens, sound alarm is triggered, red EMERGENCY light

comes on, red OVERHEATING LED comes on. Operation may be resumed after the

situation is rectified.

NO OIL AT INLET – triggered by lack of signal from LS4 level sensor. When no

oil is present at the inlet, the red LED on the mnemonic diagram comes on. Inlet pump is

stopped and locked, and can be restarted only when oil is available at inlet. If oil flow stops

at inlet, the inlet pump stops in five seconds.

VACUUM BREAK – if pressure in the receiver rises above 1000 Pa, the BOOSTER

pump stops.

OIL IN TRAY – when oil is detected in the base tray of the unit, the unit stops and

signal is triggered.

INLET PUMP – the inlet pump may only be started with oil available at inlet, the oil

is below the high level in the vacuum chamber. The pump starts when the oil drops below the

high level in the vacuum chamber. The pump stops if no oil is available at inlet, if high level

in the vacuum chamber is reached or if one of the abnormal situations is detected.

OUTLET PUMP – the outlet pump starts 6 seconds after the oil reaches mid level in

the vacuum chamber. The pump stops when oil drops below low level in the vacuum

chamber or in one of the emergency situations.

HEATER OPERATION – operation of heaters is connected to several

conditions/devices:

Thermostat switch;

Emergency stop button to disengage all heating;

Heating section engage buttons;

Flow relay: interlock to prevent heater engagement with no oil flow;

Oil temperature up to 60о.

The heater consists of three sections. Each section operates in accordance with the

temperature setting.

Oil temperature pre-programmed settings.

Setting, оС

Stage 1 55о

Stage 2 50о

Stage 3 50о

Note: changing of controller setting is not recommended, since 60о С oil is

sufficient for the degassing process. Each heater section engages with a delay after engagement of the previous section.

E.g. second section engages 5 seconds after engagement of the first section, followed

by the third section 5 seconds after the second section.

VACUUM PUMP OPERATION – the vacuum pump starts when vacuum in the

receiver is 1000 Pa. It stops either when the control button is pressed or during an abnormal

situation or if vacuum drops

BACKING PUMPS can always be started if operation is normal.

VACUUM RELEASE VALVE can be opened at any time by pressing the

VACUUM DISCHARGE button; the valve opens automatically in an abnormal situation and

remains open until the abnormality is resolved.

All actuators are stopped by pressing the EMERGENCY STOP button, while

indication is switched off by turning the main switch to the OFF position.

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.

GlobeCore CMM (UVM) 10,0 A