Manual Filtro Of100
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Oil filter unit OF 100 Operating Instructions
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Transcript of Manual Filtro Of100
Oil filter unitOF 100Operating Instructions
2 018/05/01/0
3018/05/01/0
Contents
Contents
1 General ..................................................................................................................................................... 41.1 Safety instructions .......................................................................................................................... 41.2 Designated application ................................................................................................................... 41.3 Function ......................................................................................................................................... 5
1.3.1 Function principle .................................................................................................................. 51.3.2 Cleaning and drying .............................................................................................................. 5
1.3.2.1 Cleaning of the switching oil by a paper filter ........................................................... 51.3.2.2 Cleaning and drying of the switching oil by a combined filter cartridge ..................... 5
1.4 Types ............................................................................................................................................. 61.5 Available designs ........................................................................................................................... 6
2 Design ...................................................................................................................................................... 72.1 Suction pipe ................................................................................................................................... 72.2 Pipes .............................................................................................................................................. 72.3 Pump unit ....................................................................................................................................... 7
2.3.1 Pump motor .......................................................................................................................... 72.3.2 Feed pump ............................................................................................................................ 82.3.3 Filter cartridge ....................................................................................................................... 82.3.4 Tank ...................................................................................................................................... 8
2.4 Control ............................................................................................................................................ 82.4.1 Control inside the motor drive housing .................................................................................. 8
2.4.1.1 Electrical control ....................................................................................................... 82.4.1.2 Electrical protection .................................................................................................. 8
2.4.2 Control in separate control cabinet ........................................................................................ 92.4.2.1 Electrical control ....................................................................................................... 92.4.2.2 Heating .................................................................................................................... 92.4.2.3 Electrical protection .................................................................................................. 92.4.2.4 Electrical monitoring equipment ............................................................................... 92.4.2.5 Control cabinet ......................................................................................................... 9
3 Criteria for operation ............................................................................................................................... 10
4 Schematic illustration of oil circulation ................................................................................................. 11
5 Installation ............................................................................................................................................... 12
6 Commissioning ....................................................................................................................................... 156.1 Paper filter cartridge ........................................................................................................................ 156.2 Combined filter cartridge ................................................................................................................. 16
6.2.1 Oil monitoring during commissioning and during operation .................................................. 16
7 Replacement of the filter cartridge ........................................................................................................ 177.1 Paper filter cartridge ........................................................................................................................ 17
7.1.1 Replacement of the filter cartridge........................................................................................ 177.2 Combined filter cartridge ................................................................................................................. 17
7.2.1 Replacement of the combined filter cartridge ........................................................................ 17
8 Special designs ....................................................................................................................................... 19
9 Disposal of used filter cartridges ........................................................................................................... 19
10 Appendix .................................................................................................................................................. 19
NOTE
The data described in these Operating Instructions may vary in detail from the design delivered.We reserve the right to make alterations without notice.
4 018/05/01/0
All personnel involved in installation, commissioning,operation, maintenance or repair of the equipment must:- be suitably qualified and- strictly observe these Operating Instructions.
Improper operation or misuse can lead to- a reduction in the efficiency of the equipment- damage of the equipment and property of the
user- serious or fatal injury.
Safety instructions in this manual are presented in threedifferent forms to emphasize important information.
WARNING
This information indicates particular danger to life andhealth. Disregarding such a warning can lead toserious or fatal injury.
1 General 1.1 Safety instructions
1General
1.2 Designated application
CAUTION
It is the responsibility of the user to ensure that the oilfilter unit is to be used for the designated applicationonly.For safety reasons, do not carry out any unauthorizedwork, i.e. during installation, modification, commis-sioning and alteration of the oil filter unit without firstconsulting MR!
The trouble-free operation of the motor drive, the on-load tap-changer and the transformer may be put atrisk.
WARNING
All relevant fire protection regulations must be strictlyobserved.
The oil filter unit OF 100 is exclusively used for cleaningand drying the switching oil of on-load tap-changers inpower transformers and for operating plunger-coreearth-fault neutralizers.
CAUTION
This information indicates particular danger to theequipment or other property of the user. Serious orfatal injury cannot be excluded.
NOTE
These notes give important information on a certainsubject.
CAUTION
Observe the local environmental regulations whenhandling the tap changer oil.
CAUTION
Do not dry the oil filter plant and the control cabinet(special design) together with the transformer.
5018/05/01/0
1General
1.3 Function1.3.1 Function principle
The cylindrical tank of the pump unit contains the feedpump, the pump motor and the filter insert. The flangeconnections for oil feed and return are located on thetop and bottom covers.
The pump unit draws the switching oil in through thesuction pipe of the tap changer and the feed pipe.The oil enters the tank of the pump unit and is thenpressed through the filter insert by the feed pump. Thefiltered oil (in case of combined filter insert filtered anddried) leaves the tank through the flanged connectorand returns to the tap-changer head through the returnpipe.
A pressure switch, set at 3.5 /4.0 bar (combined filter /paper filter cartridge) at the factory closes a signallingcontact, when the critical pressure has been reachedand gives a remote signal to the control room.If required by the customer, the signal of the pressureswitch is suppressed by an integrated temperatureswitch if the oil temperature falls below 20 °C. In thiscase an incorrect signal due to an increased oil visco-sity is avoided (special design).
CAUTION
Replace the filter cartridge when the working pressureexceeds 3.5 bar and the oil temperature is higher than20° C.
NOTE
Please note that the manometer may trip during start-up due to a higher viscosity of the oil in the presenceof a low oil temperature (standard design).This signal can be ignored when the oil temperature isbelow 20 °C.
The oil filter unit is used for cleaning or for cleaning anddrying the switching oil in on-load tap changers.Depending on requirements, it can be fitted with a paperfilter (for cleaning) or with a combined filter (for cleaningand drying).
1.3.2.1 Cleaning of the switching oil by paper filter
When on-load tap changers are used in industrialtransformers under extremely onerous conditions (highswitching frequencies, consistently at full load and highfrequent overloads) arcing will relatively soon causecontamination of the switching oil.This applies, forexample, to on-load tap changers incorporated intotransformers on furnace or electrolytic plants.
These service conditions can be met by an oil filterunit with a paper filter insert.
The paper filter cartridge allows to clean the oil fromsolid particles. The number of inspections and oilchanges which are otherwise necessary at short inter-vals, is reduced.
The specific contamination of the switching oil dependson:
• the quantity of oil (litres)• the switching energy (kWs)• the switching frequency
Refer to section 3, table 1 and 2 for the criteria on howto use the oil filter unit
1.3.2.2 Cleaning and drying of the switchingoil by a combined filter cartridge(paper filter with drying agent)
When the on-load tap-changer is installed in areaswhere humidity is extremely high and the temperature inthe oil conservator usually falls below the dew pointevery day, an increased water content in the tapchanger oil and an accumulation of water in the carbondeposited on the insulating materials can occur whichwill deteriorate the insulating properties of the on-loadtap-changer.
Refer to section 3, table 1 and 2 for the criteria on howto use the oil filter unit
1.3.2 Cleaning and drying
6 018/05/01/0
1General
The combined filter cartridge not only filters contaminat-ing particles from the switching oil but also reduces thewater content to a residual amount of ≤ 10 ppm.The necessary oil monitoring can be reduced and an oilconditioning during inspections is not required.The combined filter cartridge is equipped with a paperfilter on the outside (filter fineness ca. 9 micron) andfilled with a drying agent on the inside (granules approx.4 kg).
1.4 Types
The different basic designs of the oil filter unit OF 100 are identified by distinctive product designations.
1.5 Available designs
NOTE
Please note that the storage time of a combined filtercartridge in its original wrapping should not exceed4 years. Otherwise the trouble-free function of thefilter plant cannot be guaranteed.
CAUTION
Because of the highly hygroscopic properties of thedrying agent do not remove the combined filtercartridge from the transport container until immedi-ately before installation into the pump unit and com-missioning of the plant.
CAUTION
Check after receipt of the delivery that the transportcontainer with the combined filter cartridge is un-damaged. Even minor damage to the air-tightwrapping can render the filter cartridge useless in avery short time. Carefully store the filter cartridge in itsair-tight wrapping.
Type designation Description
OF 100 SP Oil Filter
Of 100 DC Oil filter unit with control in the motor drive unit with combined filter cartridgeOf 100 DP Oil filter unit with control in the motor drive unit with paper filter cartridgeOf 100 D Control for oil filter unit in the motor drive unit
OF 100 SC Oil filter unit with separate control cabinet with combined filter cartridgeOF 100 SP Oil filter unit with separate control cabinet with paper filter cartridgeOF 100 S Control in a separate control cabinet
OF 100 NC Oil filter unit with combined filter cartridge without control
OF 100 NP Oil filter unit with paper filter cartridge without control
Design Temperature switch Control
with without integrated in ED separate control cabinet
Standard design • •
Special design • •
7018/05/01/0
2 Design(see fig. 1)
A complete oil filter unit comprises the followingcomponents:
2.1 Suction pipe
A suction pipe installed in the on-load tap-changerwhich leads from the tap changer oil compartmentbottom to the tap changer head.
2.2 Pipes
Two pipes (feed and return, nominal width not less than22 mm) with appropriate flanges D115.When installing the pump unit, the feed and return pipeis to be equipped with a stop valve.The pipes and accessories are to be provided by thetransformer manufacturer.
2Design
1
Oil filter unit,schematic illustration
1 - Pump unit
2 - Contact manometer
3 - Pressure switch
4 - Oil return
5 - Stop valve
6 - Oil return pipe
7 - Tap changer head
8 - Oil feed
9 - Drain valve
2.3 Pump unit (appendix, dim. drwg. 898 718)
Ratings (standard design)Power: 1.1 kWVoltage: 3 AC 230/400 VRated current: 4.5 / 2.6 AFrequency: 50 - 60 HzSynchronous speed: 3000 1/min (50 Hz)
3600 1/min (60 Hz)
2.3.1 Pump motor
7
1
int831
2
4
5
5 63
8
9
8 018/05/01/0
2Design
2.3.2 Feed pump
Centrifugal pump capacity approx. 65 I/min (35 I/min)against a pressure of 0.5 bar (3.5 bar)
2.3.3 Filter cartridge:• Design with paper filter cartridge for cleaning of the
switching oil, filter fineness ca. 9 micron
• Design with a combined filter cartridge for cleaningand drying of the switching oil, filter fineness9 micron, granule filling approx. 4 kg
2.3.4 Tank
• Steel cylinder with top and bottom covers (pump flange)
• Outdoor design
• Dimensions (W x H x D) = 410 x 925 x 406 mmoutside paint RAL 7033
• Test pressure 6 bar
• Flanged connectors for feed and return pipes
• Manometer (mounted to tank)
• Pressure switch (mounted to pressure tank)adjustable from 0...6 bar, set at 3.5 bar,contact rating: AC 250 V, I
max = 3 A
Pmax
= 500VA/250 W
• Temperature switch (special design) at the bottom(pump flange installed) fig. 2set to 25 ± 5 °C,contact rating: AC 230 V, 10 A
• Weight of the complete pump unit (dry): approx. 75 kg
• Oil capacity: approx. 35 litres
2.4 Control2.4.1 Control inside the motor drive housing
• The electrical control of the standard design isinstalled in the housing of the motor drive unit(fig. 3).
• Control by a potential-free contact of the motor drive;Operating time:
- factory setting by time relay(see. table 1, section 3);
- adjustable up to 24 hours by time switch;- by control switch for permanent operation
• Voltage: AC 230 V
• Power consumption per motor contactor:65 VA (initial)9 VA (running)
2.4.1.2 Electrical protection
• Each pump motor is provided with a motorprotective switch with thermal and magneticoverload trip
2.4.1.1 Electrical control
3
0
MOTOR PROTMOTOR DRIVE
MAIN SWITCH OFF/ON
MR MaschinenfabrikReinhausen
1 2
0 3 9 90 0
360282
SIEMENS
SY
LVA
NIA
8
109
7L R
1514
1312
11
65
43
21
16 1721
2223
242526272829
3031
3233
201918
3435
=1
33x
MOTOR PROT OIL FILTER
SIEMENS1 2
KHW 1122-4-012 KHW 1143
1 - Temperature switch(optional)
2 - Oil sample valve
3 - Earthing screw
4 - Terminal box
5 - Stop valve
1
2
3
4
5
9018/05/01/0
2Design
2.4.2 Control in separate control cabinet(special design)
4
2.4.2.1 Electrical control
• The electrical control of the standard design isinstalled in a separate control cabinet (fig. 4).
• Control by a potential-free contact of the motor drive;Operating time:
- factory setting by time relay(see table 1, section 3);
- adjustable up to 24 hours by time switch;- by control switch for permanent operation.
• Voltage: AC 230 V
• Power consumption per motor contactor:65 VA (initial)9 VA (running)
2.4.2.2 Heating
• Voltage: AC 230 V
• Power: 15 W
• Each pump motor is provided with a motorprotective switch with thermal and magneticoverload trip
• Automatic cutout for control circuit
2.4.2.4 Electrical monitoring equipment
• Elapsed-hour meter, 5-digit display(recording of pump operating time)
• Pulse counter, 6-digit display(recording of pump starting frequency)
2.4.2.5 Control cabinet
• Sheet-steel housing, outdoor design, protection IP 55
• W x H x D : 400 x 600 x 210 mm
• Paint : RAL 7033
• Weight: ca. 10.5 kg
2.4.2.3 Electrical protection
K1
0 0 0 0 0 0
0 0 0 0 0 0 0
X1
R1
H6
Q1
S30 K29
F14
P3
P2
KHW 903-4
Control cabinet with equipment for onepump unit
K29 Time delay relayK1 Motor contactorS30 Control switchP2 Time switchP3 Elapsed-hour meterF14 Automatic cutoutQ1 Motor protective switchesH6 CounterR1 HeatingX1 Terminal strip
10 018/05/01/0
3Criteria for operation
3 Criteria for operation
For the operation of process transformers with anannual number of switching operations > 15,000 it isrecommended that an oil filter plant with a paper filtercartridge be installed, as this will extend the length ofthe maintenance interval (refer to operating instructionsof the various on-load tap-changers).
Table 1 Factory setting of pump running time of the oil filter unit with paper filter or combined filter cartridge forvarious OLTC types
OLTC (ST) M III 350 D-123 OLTC typeSelector switch (LW) OLTC (ST) M III 600 D-123 M, R, RM, T, GUbLW = max. voltage between the phases UbST = max. phase-to-phase operating voltage
on insulation distance to ground of the OLTC
V III 200 D-76V III 350 D-76 55 kV < U
bLW ��79 kV
V III 500 D-76 Um = highest voltage
79 kV < UbST
��123 kV for equipmentH III 400 D-123 79 kV < U
bLW ��123 kV OLTC
H III 400 D-145 123 kV < UbLW
��145 kV > 300 kVH III 400 D-145 79 kV < U
bLW �� 95 kV1)
1) (autotransformer)
For OLTCs in operation with full insulation between thephases (V lll ...D, H lll ...D, M lll ...D as well as thesingle-phase switches with Um = 300 kV) theinstallation of an oil filter plant with combined filtercartridge is recommended for maintaining the dielectricproperties of the switching oil according to table 2.
On-load tap changer Min. running time of pump per tap change operation
Type V, H 30 min.Type M, MS 30 min.Type R, RM 60 min.Type T 60 min.Type G 60 min.
Table 2 Operating criteria which make the installation of an oil filter unit with combined filter cartridgeobligatory.
11018/05/01/0
4Schematic illustration of oil circulation
4 Schematic illustration of oilcirculation
In process transformers each switching column is provided with one pump unit with a paper filter cartridge (fig. 5).
6
In network transformers when an oil filter unit with combined filter insert according to table 2 is used, each switch-ing column is provided with one pump unit. Exceptions are the on-load tap-changer types M III 350 D and M III 600 Das well as MS I / MS II and M I / M II as they can be operated with one pump unit only (fig. 6) for both columns.
5
Oil filter unit, schematic illustration
1 - Pump unit
2 - Manometer
3 - Pressure switch
4 - Return pipe
5 - Stop valve
6 - Return pipe
7 - Tap changer head
8 - Feed pipe
9 - Drain valve
Oil filter unit, schematic illustration, (only fornetwork transformers with a combined filtercartridge)
1 - Pump unit2 - Manometer3 - Pressure switch4 - Return pipe5 - Stop valve
6 - Return pipe7 - Tap changer head8 - Feed pipe9 - Drain valve
� = ¾" with M III 350 D
and M III 600 D
� �= 1" with OLTC combinations
M I / M IIMS I / MS II
int831
7
1
2
4
5
5 63
8
9
int830
7
1
2
4
5
5 63
8
9
12 018/05/01/0
8
5Installation
5 Installation
The installation of the complete oil filter unit should becarried out in the following steps:
• Attach the pipes and fastenings (studs) for pumpunit and control cabinet (special design) to thetransformer tank.
CAUTION
Please note that a stop valve is obligatory on thefeed and return pipe flange (fig. 9). Without it largeamounts of tap changer oil can leak out during thechanging of the filter.
97
• Before proceeding with the installation, install the on-load tap-changer in the transformer, dry it and fill itwith oil.
• Attach pump unit and control cabinet (specialdesign) to the transformer tank.
• Connect the pipes to the tap changer head (fig. 8)and to the pump unit (fig. 9), see also fig. 13.
• Establish an electrical connection with the pressureswitch ( see connection plug in fig. 7) respectivelythe temperature switch (special design).
bar
32
1
0 6
5
4
KI1,6
ACHTUNG! Die Filterpatrone fürdie Filteranlage wird separat mitgeliefert! VorInbetriebnahme muss diese Filterpatronegemäss Betriebsanweisung BA 18/... eingebautwerden!
ATTENTION! The filter cartridgefor the filter unit is packed separately!The filter cartridge is to be installedaccording to Operating Instructions BA 18/...before putting the unit in service!
IMPORTANT!!!
delivery
filter
commissioning098 655:02
MR REINHAUSEN
Umax: 250 V AC Imax: 3 A
Schaltdruck: ........ 3,5 bar
GERMANY
Pmax: 500 VA / 250 WMR-Nr.:706094:00
KHW 1120
NOTE
Take care to keep the inner surfaces of the pipesabsolutely clean and free of rust, scaling etc. KHW 805
MR REINHAUSENGERMANY
5
bar60
1
2 43
KI1,6
Umax: 250 V AC Imax: 3 ASchaltdruck: ........ 3,5 bar
Pmax: 500 VA / 250 W
MR-Nr.:706094:00
KHW 1114
SR
E2
Q
Connected to Q(compare tofig. 8)
>
CAUTION
Check the oil level in the oil conservator after theinstallation.The trouble-free operation of the oil filter unit, the on-load tap-changer and the transfomer may be put atrisk.
Connected to S(compare tofig. 8)
�
<
13018/05/01/0
NOTE
If the phase sequence is correct the manometershows higher than 3.5 bar with the pump running andthe return valve shut.
• Establish proper ground connections at the pumpunit and at the control cabinet (special design).Ground connection of the OF 100 is ensured on allthe flanges by 4 contact washers for each flange.The contact washers are locking devices and ensurea proper metallic contact. A ground connection for thepump unit is provided on the terminal box (fig. 10).
• The electrical connection of the pump motor and ofthe control cabinet (special design) must be esta-blished according to the corresponding circuitdiagram (see appendix).
5Installation
• Ensure proper filling of the pump unit.
• Bleed the pipe system and the pump unit by openingthe bleeder screw (fig. 11) on the return pipe flange.
10 KHW 1142
Earthing screw
Special design:temperature switch
�
�
After installation of the oil filter plant at the transformersite prick the breather cap on top of the manometer withthe attached needle, as shown on the decal (fig. 12).
11 KHW 1118
�Bleeder screw
�Breather cap
12
MR REINHAUSENGERMANY
5
bar60
1
2 43
KI1,6
Umax: 250 V AC Imax: 3 ASchaltdruck: ........ 3,5 bar
Pmax: 500 VA / 250 W
MR-Nr.:706094:00
KHW 1114
�
�Needle
Decal
14 018/05/01/0
5Installation
TypeH
ConnectingflangeS, Q
O-ringgasket 44.2-5.7
ConnectingflangeS, Q
O-ringgasket 44.2-5.7
ConnectingflangeS, Q
O-ringflange 44.2-5.7
ConnectingflangeS, R
Sealingarea
TypeMSMRMR
TypeG
11585
66
26
14
12585
60
28
M10
85
14
115
40
11585
66
26
14
11585
66
26
14
R,E
R,ER
S
45° 45°
45°45°
S
R
Q
E2
15°
15°
15°
S
R
E2
15°
15°
15°
S
R
E2
17°
17°8,5°
8,5°
E1
E1
E1
Q
Q
TypeV
Position of feed and return pipe connection on the tap changer head13
15018/05/01/0
6Commissioning
6 Commissioning
CAUTION
The filter cartridge (paper filter or combined filtercartridge) is delivered separate from the oil filter unitand must not be unpacked and installed into the oilfilter unit until immediately before commissioning.
Before commissioning the oil filter unit make sure thatthe filter cartridge has been installed. Without it theoil filter unit is ineffective.
6.1 Paper filter cartridge (4.8 kg)
• Operate switch S30 to make a test run
• For a functional test close the stop valve of thereturn pipe. During operation of the oil filter unit thecontact manometer should read a pressure of atleast 3.5 bar. If not check the phase sequence of themotor voltage (W, V, U clockwise).
• The operating time of the pump unit at the timedelay relay K29 is set to match the oil content of thetap changer oil compartment. It is set by the manu-facturer on the basis of the values stated in table 1.
• Under certain operating conditions it may be neces-sary to set a different pump operating time. In thiscase the desired operating time has to be readjustedat the time delay relay K29 (up to 100 hours).
• Check by giving an impulse at the motor drive to setthe pump unit going automatically as soon as themotor drive starts.
• Bleed the tank at the return pipe connection(see fig. 11).
• Bleed the feed pipe connection (suction pipeconnection) at the tap changer head (seefig. 8).
• Carry out all other commissioning proceduresaccording to section 6.1 or 6.2.
• Perform a test run and bleed again.
Perform the functional test with the control cabinet(special design) open and the supply voltage connectedas the motor protective switch for the pump motor isonly accessible in this way.
WARNING
Observe the safety regulations during commissioning.Danger to life and limb.
When using the integrated time switch (special design)the pump unit - independent of the switching operationsof the on-load tap-changer - is set to a daily pumpoperating time of at least 2 hours. The operating time isset by the manufacturer between 0.00 and 2.00 o'clock.When taking the oil filter unit into service set the timeswitch to local time.
Installation of the filter cartridge (paper and combinedfilter cartridge, see appendix, drawing 707 931)
• Shut the stop valves of the feed and return pipe
• Loosen the connecting flange at the return pipeconnection
• Loosen the 6 cover screws M10/SW17, 2 ringscrews M10, remove the cover with gasket.
• If the pump unit has already been filled with oil, drainapprox. 10 l at the sampling valve (see fig. 2).
• Take the cartridge out of the transport case andinsert it into the pump unit; please note that thecartridge will be centred automatically when thecover is closed.
• Fasten the cover and the cover gasket (6 screwsM10/SW17, 2 ring screws M10, max torque 30 Nm).
• Attach the connecting flange on the return pipeconnection.
• Open the stop valve for feed and return pipe.
16 018/05/01/0
CAUTION
The combined filter cartridge is packed separately.Before commissioning, the filter cartridge has to beinstalled and the tank filled with oil. These actionsmust be carried out one after the other without inter-ruption to avoid that the combined filter cartridgeabsorbs humidity from the air.Use only new and clean transformer oil with a di-electric strength of ≥ 60 kV/2.5 mm and a residualwater content of ≤ 10 ppm.
Take oil samples from each transport container andanalyse them. Furthermore, make sure that the oilquality is not affected by dirty filling equipment.
Before commissioning the filter unit at an active on-load tap-changer, all insulating parts immersed in tapchanger oil (diverter switch unit and inner surface ofthe oil compartment) must be thoroughly cleaned andinspected.
6Commissioning
For operating conditions that require the use of acombined filter unit see table 2.
Test run, functional test and setting of the pump ope-rating time are carried out according to section 6.1.
6.2 Combined filter cartridge (14.0 kg,transport case included)
CAUTION
The combined filter cartridge must never be exposedto humidity.
6.2.1 Oil monitoring during commissioningand during operation
After commissioning the oil filter unit must be operatedcontinuously for 24 hours.
The drying ability of the combined oil filter cartridgemust be controlled by taking oil samples at regular in-tervals. If the measured residual water content of theswitching oil exceeds 20 ppm, the combined filter mustbe replaced.
Check the residual water content and the dielectricstrength when commissioning the oil filter unit andduring further operation on the basis of the flow chart asshown in fig. 14. In dependence on the water content,relevant measures must be carried out
Fig. 14 shows the standard procedure in bold print, i. e.the water content and the dielectric strength are withinthe admissible range.
For this standard procedure oil samples are taken in thefollowing intervals:
- first oil sample 30 min after commissioning- second oil sample 24 hours after commissioning- third oil sample 3 months after commissioning- fourth oil sample 15 months after commissioning- further oil samples at 2-year intervals.
Note down the oil temperature of every oil sample.
Independent of the criteria for the residual watercontent, the dielectric strength of the tap changer oilmust be at least 40 kV/2.5 mm, measured according toDIN VDE 0370 Teil 1.
CAUTION
The combined filter has to be replaced:
- when the max. operating pressure of approx.3.5 bar has been reached, or
- when the residual water content exceeds 20 ppm even after 24 hours of operation, or- when the dielectric strength of not higher than
40 kV/2,5 mm has been reached after 24 hoursof filter operation
If one of these limit values has been exceed, thefilter cartridge must be replaced.
17018/05/01/0
7Replacement of the filter cartridge
The paper filter cartridge must be replaced when themax. operating pressure of approx. 4 bar has beenreached.The exact pressure limit is set by the manufacturer atthe pressure switch.
7.1.1 Replacement of the filter cartridgeshould be carried out as follows(see appendix, drawing 707 931):
• Shut the stop valves of feed and return pipes
• Loosen the connecting flange at the return pipeconnection.
• Loosen the 6 cover screws M10/SW17, 2 ringscrews M10, remove the cover with gasket.
• Drain approx. 2 liters through the drain valve(see fig. 2)
• Slowly pull out the old filter cartridge using thehandle
• Take the new cartridge out of the transport case andinsert it into the pump unit; please note that thecartridge will be centred automatically due to thepressure exerted during the closing of the cover.
• Fasten the cover and the cover gasket (6 screwsM10/SW17, 2 ring screws M10, max torque 30 Nm).
• Attach the connecting flange on the return pipeconnection
• Open the stop valve for feed and return pipe
• Bleed the tank at the return pipe connection(see fig. 11).
• Bleed the feed pipe connection (suction pipeconnection) at the tap changer head (see fig. 8)
• Perform a test run and bleed again.
7 Replacement of the filter cartridge7.1 Paper filter cartridge
CAUTION
The paper filter cartridge is separately delivered indried condition. Do not unpack until immediatelybefore installation.
7.2 Combined filter cartridge
7.2.1 For replacing the combined filtercartridge proceed as described insection 7.1.1.
Oil monitoring is to be carried out according to section6.2.1. Strictly observe the safety instructions given insection 6.2
CAUTION
Only use original MR filter cartridges which areespecially designed for the described oil filter unit.The use of another type of filter cartridges can lead tosevere damage on the complete oil filter unit, and thesequence of operation to be observed (see fig. 14) isno longer ensured. MR must decline any responsibilitywhen another type of filter cartridges is used.
CAUTION
Only use the here described oil filter unit OF 100 forMR OLTCs, which has been specially designed for theconditions around this type of an on-load tap-changer.The use of other oil filter units on MR on-load tap-changers can lead to problems on the on-load tap-changer and the transformer.
.The combined filter cartridge is to be replaced:
- when the operating pressure exceeds 3.5 bar,- when the residual water content exceeds 20 ppm,- when the dielectric strength is lower than
40kV/2.5mm.
18 018/05/01/0
Oil filter unit with combined filter cartridge – Supervision of oil qualityFlow chart to be observed when putting the oil filter unit into service,
when replacing the filter cartridge, or after an on-load tap-changer inspection
< 10 ppm and> 40 kV/2.5 mm
≤ 20 ppm and> 40 kV/2.5 mm
Dielectric strength UD of the tap changer oilmeasured according to DIN VDE 0370 part 1
> 30 ppm< 30 ppm and
> 40 kV/2.5 mm
Do not put transformerinto service
< 10 ppm and> 40 kV/2.5 mm
> 30 ppm or< 40 kV/2.5 mm
2. oil sampleafter 24 hours
10 ppm ≤ H2O < 30 ppmand UD > 40 kV/2.5 mm
Leave transformer in serviceFilter for another 24 hours
Put thetransformer out
of service
Put transformer into serviceFilter for another 24 hours
10 ppm ≤ H2O < 30 ppmand UD > 40 kV/2.5 mm
< 10 ppm and> 40 kV/2.5mm
> 30 ppm or< 40 kV/2.5 mm
Do not puttransformer into
service
Another oil sample
> 20 ppm
< 10 ppm and> 40 kV/2.5 mm
10 ppm ≤ H2O < 20 ppm
> 20 ppm
Another oil sample
Replace filtercartridge
Transformer may remain inservice
Prepare to replace filtercartridge
Operating limits after 24hours of filter operation:
max. 20 ppm H2Omin. 40 kV/2.5 mm UD
Transformer may remain inservice
Prepare to replace filtercartridge
Operating limits after 24hours of filter operation:
max. 20 ppm H2Omin. 40 kV/2.5 mm UD
Replace the filtercartridge
10 ppm ≤ H2O < 20 ppm
> 20 ppm or< 40 kV/2.5 mm
Filter for 24hours
Oil sample 3 months after commissioning
> 20 ppm oder< 40 kV/2,5 mm
≤ 20 ppm and> 40 kV/2.5 mm
Oil sample
Filter for 24 hours
> 20 ppm or< 40 kV/2.5 mm
≤ 20 ppm and> 40 kV/2.5 mm > 20 ppm or
< 40 kV/2.5 mm≤ 20 ppm and
> 40 kV/2.5 mm
Oil sample
Oil samples in2-year intervals
> 20 ppm or< 40 kV/2.5 mm
Filter for24 hours
Oil sample
≤ 20 ppm and> 40 kV/2.5 mm
> 20 ppm or< 40 kV/2.5 mm
≤ 20 ppm and> 40 kV/2.5 mm
1. oil sampleafter 30 Min.
2. oil sampleafter 24 hours
Put thetransformer into
service
Oil sample 15 months after commissioning
Oil compartment with new oilH2O content < 10 ppm
UD > 60 kV/2.5 mm
Fill with oiloberserve cleanliness
Filter pump “ON”(for 24 hours)
Put transformerinto service
Leavetransformer in
service
7Replacement of the filter cartridge
14
19018/05/01/0
Special designs/Disposal of used filter cartridges 8/9Appendix 10
8 Special designs 9 Disposal of used filter cartridges
The electrical equipment of the control cabinet can besupplied in the following special designs:
• Different rated voltages and/or rated frequencies formotor and control circuit
Disposal of used oil filters in accordance with the localenvironmental regulations.
10 Appendix
Rating plate _______________________________________________________________________ WN 4033-02
Pump unit, dimension drawing ____________________________________________________________ 898 718
Oil filter unit, control cabinet ______________________________________________________________ 897 688
Installation and replacement of the oil filter unit ________________________________________________ 707 931
Control for oil filter unit (1pump) in the motor drive, standard connection diagram _____________________ 362 596
Control for oil filter unit (3 pumps) in the motor drive, standard connection diagram ____________________ 362 597
Control for oil filter unit (1 pump) in the control cabinet, standard connection diagram __________________ 362 715
Control for oil filter unit (3 pumps) in the control cabinet, standard connection diagram ________________ 362 716
20 018/05/01/0
Oil filter unit OF 100WN 4033-02
Rating plate
10Appendix
Field No. Explanation Designation example
1 MR serial number of oil filter unit 362819A
2 Year of construction 1999
3 Type designation OF 100 SC
4 Serial number of the tap changer 150890
5 Motor voltage 400
6 Motor frequency 50
7 Setting of overcurrent tripping 3.2
8 Control voltage 230
9 Frequency 50
10 Connection diagram 362462
1 2 3
4
5 6 7
8 9 10
21018/05/01/0
10Appendix
Oil filter unit OF 100 898 718:2EDimension drawing
Return pipe Bleeder screw
Pressure switch
Manometer
Pg 9(cable � 6 ... 8)
O-ring 400854:00 (44.2 – 5.7 FP)
The connecting flange is supplied with an O-ring.(Flat gasket �114�x �40 x 2 type"KLINGER-SIL C-400" is also permitted)
Filter cartridge:
The filter cartridge (paper or combinedfilter) is supplied loose. The filter must notbe installed until immediately before thecommissioning of the transformer!Installation and changing of the filteraccording to installation drawing 707931.
Control:
In the standard model the control of the oilfilter unit is integrated in the motor driveunit. The control of the special design isinstalled in a separate control cabinet.
View XSampling valve
Pg 16 (cable � 8 ... 10)
Ground screw
Pg 16(cable � 7.5 ...16)
The pipe connection (086942:) iscontinuously adjustable in an anglerange from 150° to 225° and from315° to 30°
Fee
d
Terminals forpump motor
Samplingvalve
Temperature switch (forspecial design only)cable gland Pg 9(cable � 6 ... 8)
Shut-off valves are not includedin the delivery of the oil filterplant. MR can supply suchvalves on request.
Bleeder screw
22 018/05/01/0
Oil filter unit OF 100Control cabinet 897 688:2E
Dimension drawing
View from
the rear
View »X«
10Appendix
23018/05/01/0
10Appendix
Oil filter unit OF 100707 931:0E
Installation and replacement of the filter cartridge
450
970
(M10
)
705
917
(SK
M10
)
455
046
(M10
x 2
0)
705
917
(SK
M10
)or
704
370
(S
KK
10)
705
921
(O-r
ing
215-
7)70
5 92
2 (O
-rin
g 26
5-5)
Lifti
ng le
ver
Inst
alla
tion
proc
edur
e (in
stal
latio
n an
d re
mov
al o
f filt
er c
artr
idge
):
1.A
fter
clos
ing
the
two
stop
val
ves
on th
e fe
ed a
nd r
etur
n pi
pe th
eco
ver
can
be o
pene
d by
loos
enin
g th
e 6
fixin
g sc
rew
s (M
10 x
20)
and
the
2 ey
ebol
t scr
ews
(M10
).
2.A
fter o
peni
ng th
e co
ver t
he fi
lter c
artr
idge
can
be
inse
rted
into
the
flang
e by
mea
ns o
f the
lifti
ng le
ver
inte
grat
ed i
n th
e ca
rtrid
ge.
(The
lifti
ng le
ver
mov
es b
ack
into
its
fixin
g gr
oove
whe
n cl
osin
gth
e co
ver
so th
at it
will
not
touc
h an
y se
alin
g su
rfac
e).
Pip
e c
onne
ctio
n tu
rned
tose
ctio
nal p
lane
Cor
resp
ondi
ng d
imen
sion
dra
win
g 89
8 71
8:
Sto
p va
lve
M12
Torq
ue =
80
Nm
Torq
ue =
30
Nm
Md
= 3
0 N
m
Fla
nge
Filt
er c
artr
idge
:
Pap
er o
r co
mbi
ned
flter
car
trid
geis
del
iver
ed lo
ose
and
mus
t not
be
inst
alle
d un
til im
med
iate
ly b
efor
e th
eco
mm
issi
onin
g of
the
tra
nsfo
rmer
.
3.T
he fi
scr
ews
M10
mus
t be
tigh
tene
d w
ith a
lim
ited
torq
ue o
f 30
Nm
.
4.D
ue to
its
pre-
tens
ion
the
liftin
g le
ver
is li
fted
out o
f the
gro
ove
abov
eth
e oi
l lev
el w
hen
the
cove
r is
ope
ned
so th
at th
e fil
ter
cart
ridge
can
be
easi
ly li
fted
out.
24 018/05/01/0
10Appendix
Oil filter unit OF 100Control for oil filter unit (1 pump) in motor drive 362 596
Standard connection diagram
B5
PR
ES
SU
RE
SW
ITC
HK
7M
OTO
R
CO
NTA
CTO
R
FO
R
PU
MP
K29
TIM
E R
ELA
YM
4M
OTO
R
FO
R
PU
MP
Q4
MO
TOR
P
RO
TE
CT
IVE
S
WIT
CH
S30
SW
ITC
H F
OR
PU
MP
TE
ST
S11
6C
AM
-OP
ER
ATE
D
CO
NTA
CT
IND
ICAT
ION
O
VE
RP
RE
SS
UR
E
25018/05/01/0
10Appendix
Oil filter unit OF 100Control for oil filter unit (3 pumps) in the motor drive 362 597
Standard connection diagram
B4
PR
ES
SU
RE
S
WIT
CH
B5
PR
ES
SU
RE
S
WIT
CH
B6
PR
ES
SU
RE
S
WIT
CH
K7
MO
TO
R
CO
NTA
CTO
R
FO
R
PU
MP
SK
29T
IME
R
ELA
YM
4M
OT
OR
FO
R P
UM
P 1
M5
MO
TO
R F
OR
PU
MP
2
IND
ICAT
ION
O
VE
RP
RE
SS
UR
E
M6
MO
TO
R F
OR
PU
MP
3Q
4M
OT
OR
P
RO
TE
CT
IVE
S
WIT
CH
F
OR
P
UM
P
1Q
5M
OT
OR
P
RO
TE
CT
IVE
S
WIT
CH
F
OR
P
UM
P
2Q
6M
OT
OR
P
RO
TE
CT
IVE
S
WIT
CH
F
OR
P
UM
P
3S
30S
WIT
CH
FO
R P
UM
P T
ES
TS
116
CA
M-O
PE
RAT
ED
C
ON
TAC
T
26 018/05/01/0
10Appendix
Oil filter unit OF 100Control for oil filter unit (1 pump)in control cabinet 362 715
Standard connection diagram
B5
PR
ES
SU
RE
S
WIT
CH
B6
TE
MP
ER
ATU
RE
S
WIT
CH
F14
AU
TOM
ATIC
C
UT-
OU
TH
1S
IGN
ALL
ING
LA
MP
"Q
1 O
FF
" C
ON
TR
OL
RO
OM
H4
SIG
NA
LLIN
G L
AM
P "
PU
MP
IN
OP
ER
ATIO
N"
CO
NT
RO
L R
OO
MH
6E
LEC
TR
ICA
L C
OU
NT
ER
K1
MO
TO
R
CO
NTA
CTO
R
FO
R
PU
MP
K29
TIM
E
RE
LAY
M1
MO
TO
R F
OR
PU
MP
P2
TIM
E S
WIT
CH
P3
SE
RV
ICE
H
OU
R
ME
TE
RQ
1M
OT
OR
P
RO
TE
CT
IVE
S
WIT
CH
R1
HE
ATE
RS
30S
WIT
CH
FO
R P
UM
P T
ES
T
IND
ICAT
ION
O
VE
RP
RE
SS
UR
E
CO
NTA
CT
WIT
HO
UT
P
OT
EN
TIA
L I
N T
HE
M
OTO
R
DR
IVE
27018/05/01/0
10Appendix
Oil filter unit OF 100Control for oil filter unit (3 pumps) in control cabinet 362 716
Standard connection diagram
CO
NTA
CT
W
ITH
OU
T
PO
TE
NT
IAL
IN T
HE
M
OT
OR
D
RIV
E
B4,
B5,
B6
PR
ES
SU
RE
S
WIT
CH
B7,
B8,
B9
TE
MP
ER
ATU
RE
S
WIT
CH
F14
AU
TOM
ATIC
C
UT-
OU
TH
1S
IGN
ALL
ING
LA
MP
"Q
1 O
FF
" C
ON
TR
OL
RO
OM
H2
SIG
NA
LLIN
G L
AM
P "
Q2
OF
F"
CO
NT
RO
L R
OO
MH
3S
IGN
ALL
ING
LA
MP
"Q
3 O
FF
" C
ON
TR
OL
RO
OM
H4
SIG
NA
LLIN
G L
AM
P "
PU
MP
IN
OP
ER
ATIO
N"
CO
NT
RO
L R
OO
MH
6E
LEC
TR
ICA
L C
OU
NT
ER
K1
MO
TOR
C
ON
TAC
TOR
F
OR
P
UM
P
1K
2M
OTO
R
CO
NTA
CTO
R
FO
R
PU
MP
2
K3
MO
TOR
C
ON
TAC
TOR
F
OR
P
UM
P
3K
29T
IME
R
ELA
YM
1M
OTO
R F
OR
PU
MP
1M
2M
OTO
R F
OR
PU
MP
2M
3M
OTO
R F
OR
PU
MP
3P
2T
IME
SW
ITC
HP
3S
ER
VIC
E
HO
UR
M
ET
ER
Q1
MO
TOR
P
RO
TE
CT
IVE
S
WIT
CH
F
OR
P
UM
P
1Q
2M
OTO
R
PR
OT
EC
TIV
E
SW
ITC
H
FO
R
PU
MP
2
Q3
MO
TOR
P
RO
TE
CT
IVE
S
WIT
CH
F
OR
P
UM
P
3R
1H
EA
TE
RS
30S
WIT
CH
FO
R P
UM
P T
ES
T
IND
ICAT
ION
O
VE
RP
RE
SS
UR
E
© Maschinenfabrik Reinhausen GmbH 2001Postfach 12 03 6093025 RegensburgGermanyPhone: (+49) 9 41 / 40 90-0Fax: (+49) 9 41 / 40 90-111Internet: http://www.reinhausen.comEmail: [email protected]
BA 018/05 en - 1201/2000018/05/01/0F0007604Printed in Germany
