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EARTHING TRANSFORMERS
ETR
WAYS OF ENERGY
EGE, spol. s r.o.
Novohradská 34370 08 České Budějovice
Czech Republic
Tel.: +420 387 764 412Fax: +420 387 764 603
E-mail: [email protected]
www.ege.cz
HV BUHV BUHV SHINGS∙ porcelaicelain /n /DIN 42DIN 4253531-1-2/2/∙ Euromoldomold· Pfistesterer Connex
OFOFOFF-LOAD TAP CHANGER
RADIATORS
TRANSFORMERSFORMERSFORMER LIFTING LUGS
RATIRATIRA NG PLATE
OIL LEVEL INDICATOCATOCA RRR∙ magnetic with contact∙ ∙ glasglass ts tubube - DIN 42e - DIN 42555555555
SILICAGEL BREATHERHER∙ DIN 42562 - L1-L3∙ DIN 4∙ DIN 4∙ DIN 4252525676767 - T - T - TYYYP BP BP B
LV BULV BULV SHINGS∙ porcelain DIN 4253030∙ p∙ pororcelaicelain DIN 4n DIN 42525393939
OIL CONSERVATOTOVATOVA R
AUXILIARY TERMINALNALNAL BOX
BUCHHOLZ RELAYLAYLA
OIL THERMOMETER
Fig. 6 ETR earthing transformer – tank with radiators
ETR earthing transformers are used to create an artificial neutral in distribution electric networks:
Typical parameters of ETR earthingtransformers are:• voltage of networks from 6 kV up to
52 kV• rated power from 200 up to 8 000 kVA• connection group ZN, ZNyn 11 or other
variants based on customer s wishes• rated power of secondary side from
50 kVA up to 1 500 kVA
Typical ETR earthing transformers are placed in a corrugated wall tank and hermetically sealed. Typical surface protection of corrugated wall tanks is zinc paint and top coat. Typical colour shade is RAL 7033.
Alternatively larger ETR earthing transformers can be placed in a tank equipped with DIN radiators, an expansion tank and an air breather.
Radiators are hot dip galvanized and painted, the tanks are provided with a zinc layer using spray zinc metallizing method.
The expansion tank is equipped with an oil level gauge.
Bushings are of various types: porcelain DIN or EN bushings, Euromold or Connex cable connectors.
The transfomer oil temperature is monitored by a thermometer or integrated safety detector.
Typical transformer oil used in ETR earthing transformers is Nynas Nytro Libra.
Lugs determined for lifting the completetransformer are placed on the cover or on tank walls under the cover /larger earthing transformers/.
On request ETR earthing transformers are equipped with an off-load tap changer.
ETR earthing transformers are equipped with an oil drain valve placed at the bottom of a transformer.
If required the transformers can be equipped with bi-directional wheels.
Special seismically durable design can beprovided upon request.
EARTHINGTRANSFORMERS
ETR
EGE, spol. s r.o.
Novohradská 34370 08 České Budějovice
Czech Republic
Tel.: +420 387 764 412Fax: +420 387 764 603
E-mail: [email protected]
www.ege.cz
Fig. 2 ETR earthing transformer – hermetically sealed
Fig. 1 Earthing transformer in an electricdistribution network
Power transformer
Network
Earthing transformer[Artificial neutral point]
HV BUHV BUHV SHINGS∙ porcelaicelain /n /DIN 42DIN 4253531-2/∙ Euromolomold· Pfistererer Connex
OIL DRAIAIN N VALVE∙ DIN 4∙ DIN 42551/OR-31/
INTEGREGREGRATATED ED SAFESAFETYTY DEDETETECTCTORORcontcontrol the following conditions:∙ preressure∙ tempeemperature· oil lil level· gasassingsingsing
TRANSFORMERSFORMER WHEELS/D/D125, D, D, D16160,0,0, D D20200/0/0/
PRESSURE SAFETYTY VALVE∙ 30 kPa∙ 5∙ 50 0 kPkPa
EARTH CONNECNNECTION∙ M12
TRANSFORMER LIFTINING LUGSLUGS
FREE THERMOMETER POCKET
RATIRATIRA NG PLATE
OFOFF-LOAD TAP CHANGER
CORRUGATED WALLS
TRANTRANTRANSFORMER LIFTING LUGS
SILILICAGEL BREATHER∙ DIN 4∙ DIN 42562 - L1-L3∙ DIN 4∙ DIN 42567 - TYP B
HV BU BUHV BUHV SHINGS∙ porcelaicelain /DIN 42531-2/2/∙ Euromolomold· Pfistestererer Cr Conneonnex
LV BULV BULV SHINGS∙ porcelain DIN 425253030∙ poporcelain DIN 425253939
OIL FILLING HOLE AND PLUGPLUGPLUG∙ DIN 4∙ DIN 42552553 -3 -DD
OIL THERMOMETERER
RATIRATIRA NG PLATE
BUCHHOLZ RELAYLAYLA
OIOIL L LEVELEVEL INL INDIDICACATOTOCATOCACATOCA RR∙ magnetic with conontatact∙ glass tube - DIN 42e - DIN 42555555
OIL CONSERVATOVATOVA R
TRANSFORMER WHEEEELS /D125, D16160, D200/
Fig. 4 ETR earthing transfomer – hermetically sealed
Fig. 5 ETR earthing transformer – corrugated tank with expansion tankFig. 3 ETR earthing transformer – tank with radiators