Minera MP Oil immersed medium power transformer

StandardThese transformers comply with standards: IEC standards; French standards NFC 52 100 (1990);Schneider Electric guarantees that its transformers are assembled using new PCB-free components.

DescriptionThis range consists of transformers complyingwiththefollowingspecification: Three-phase transformers, 50 or 60 Hz, for indoor

oroutdooruse(installationtobespecified); Maximum ambient temperature: 40C (others

ambient temperatures 45C, 50C, 55C, etc. upon request); Mineral oil immersed (other dielectric upon re-

quest); Breathing type with conservator ; Cover bolted on tank or welded bell type as per

specification; ONAN, ONAF, ODAF or ODWF cooling type; Standard anti-corrosion surface treatment and

coating (others possibilities upon request); Final colour RAL 7033.

Standard fittingEach transformer includes: 1 off-circuit tappings switch with padlocking located

on the cover ; this switch operates on the highest rated voltage to bring the transformer to the supply voltage-actual value (generally 5%, 3 or 5 positions);

Porcelain bushings on primary and secondary sides;

2 earthing terminals; 1 conservator with level indicator tube; 1 silicagel airdryer; 1 Buchholz relay with 2 contacts

(alarm and tripping); 1 thermostat with two contact

(alarm and tripping);

1 dial type thermometer (without contact); 4directionalflatrollers; Lifting and/or untanking lugs; 1 rating plate; 1fillingplug; 1 draining device and treatment valve with sampler.

OptionsThefollowingfittingsmaybeprovidedasanoption: 1 on-load tap changer in the main tank (generally

12% - 19 positions maximum) with: -1motordriveunitfittedontank; - 1 tap changer compartment in the conservator with a level indicator; - 1 protective relay and eventually, on request: - 1 parallel operation device; - 1 voltage regulator with voltage drop equalizer; - 1 remote indicator of tap changer position.

Magnetic level indicator (with or without contact, please specify);

HVfixedplug-inconnectorsHN52S61: - 250, 400, 630 or 1250 A - 24 kV; - 400, 630 or 1250 A - 36 kV.

HV mobile plug-in connectors HN 52 S 61, straight or elbow (the cable characteristics should be speci-fied);

Condenser bushings; Increased creepage distance bushings; 1 bonnet on HV bushings:

- in the air for connection by dry cables or busducts (except rated insulation level 72.5 kV) ; - oil immersed, hermetically sealed for cable con-nection; - SF6 immersed, hermetically sealed for connec-tion by busbars on oil/SF6 bushings;

Winding temperature indicator by thermal image ; Current transformer: bushing type around termi-

nals - standard type for earth fault current detector; 1 overpressure valve (with or without contact,

please specify); 1 automatic oil retaining valve (between conserva-

tor and tank); Atmoseal oil protection system; 1 treatment valve at the upper part of the tank ; 1 insulation valve for radiators; 4 jacking lugs with hauling eyes.

Minera MPFrom 5 to 60 MVA, for 7.2 to 123 kV systems

PM

1023

10

Oil Distribution Transformers

The above options concern usual cases and are not restrictive. For other information,please consult us.

Electrical characteristics

Oil Distribution Transformers

Dimensions and weights

NRJED311273EN 11-2011

Asstandards,specificationsanddesignschangefromtime totime,pleaseaskforconfirmationoftheinformationgiven in this publication.

Design: Schneider Electric Industries SASPhotos: Schneider Electric Industries SAS

35, rue Joseph Monier CS 30323 F - 92506 Rueil Malmaison Cedex (France) Tl. : +33 (0)1 41 29 70 00RCS Nanterre 954 503 439 Capital social 896 313 776 www.schneider-electric.com

Schneider Electric Industries SAS

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Minera MP

ONAN Type Cooling

Typical dimensions and weights are indicated in the table below for mineral oil immersed transformers, completely set up* with a standard type cooling. They corre-spond to transformers intented for systems of 7.2 to 72.5 kV having electrical character-istics as indicated in the previous table. For other voltages, other characteristics or when the transformers are immersed in another dielectric,dimensions and weights would be different, please, consult us.

Power (MVA) 5 10 20 25 5 10 20 25 30

Insulation level - Primary- Secondary

24-36 kV7.2- 12 - 17.5 - 24

72.5 kV7.2 - 17.5

No-load losses (w)Load losses (w)

643

1071

17120

21140

743

1171

18120

22140

25160

Impedance voltage (%) 8 9 10 11 8 9 10 11 11

with off-voltage tappings switch with on-load tap changer

Rated power (MVA)

Dimensions (mm) Total weight Kg

Dimensions (mm) Total weight KgA B C E A B C E

Rated insulation level 24 kV

5102031 to 60

2700375043004000

2100245039003900

2500350036003800

1000150015001500

8500170002650035000

3400380046004100

2200250039003900

2550350036003800

1000150015001500

10000190002700037000

Rated insulation level 36 kV

5102031 to 60

3300390044004200

2400330039504300

2950360037004000

1000150015001500

11000180002700036000

3600390047004800

2400340040004300

3000360037004000

1000150015001500

13000200002900038000

Rated insulation level 72.5 kV

5102031 to 60

4100390045004400

2600340040004600

3300350040004300

1000150015001500

17000180002700041000

-400050005000

-390041004600

-360040004300

-150015001500

-220003200043000

The above options concern usual cases and are not restrictive. For other information,please consult us.

ODAF Type Cooling

C

E B

A

Transformers 5 MVA, with off-voltage tappings switch.

E

A

C

B

Transformers 5 MVA with on-load tap changer, or 10 to 25 MVA with off-voltage tappings switch or with on-load tap changer.

C

BA

Transformers 20 to 25 MVA, with off-voltage switch or on-load tap changer.

With off-voltage tappings switch With on-load tap changer

Rated power (MVA)

Dimensions (mm) Total weight Kg

Dimensions (mm) Total weight KgA B C A B C

Rated insulation level 72.5 kV

2025

35004000

27003000

40004300

2100025000

45004700

30003000

40004300

2300028000

Rated insulation level >72.5 kV