REAL POWER IS THE POWER THAT MAKES TECHNOLOGY AVAILABLE TO ALL
DISTRIBUTION TRANSFORMERS
DISTRIBUTION TRANSFORMER CHARACTERISTICS
- Power, from 25kVA, up to 3150kVA
- High voltage: up to 36kV, (single or dual voltage)
- Frequency: 50 or 60 Hz
- Low voltage: 420 V, (others on request: 242, 690, dual voltage 420+242, etc.)
- Connection group: Yzn11 or Dyn11 up to 100 kVA, Dyn11 from 160 kVA
- Liquid: mineral oil, or K-type liquids, (silicone, natural or synthetic esters)
- Expansion system: integral filling, (others on request: with expansion tank, with chamber)
- Cooling: natural, (ONAN or KNAN)
- Standards: UNE 21428, RE 548, UNE-EN 60076, and technical specifications of companies.
TECHNICAL DATA SHEET SPECIFICATIONS
Due to the constant evolution of designs, measurements and weights may vary from those indicated here. If necessary, please contact JARA to confirm the data you require.
POWER TRANSFORMERS
CHARACTERISTICS OF POWER TRANSFORMERS
- Power, from 3150kVA, up to 40MVA
- High voltage: up to 72,5kV, (single or dual voltage)
- Frequency: 50 or 60 Hz
- Low voltage: according to project, (20.000V, 45.000V, 66.000V, etc…).
- Connection group: YNd11, Dyn11, others
- Liquid: mineral oil, or K-type liquids, (silicone, natural or synthetic esters)
- Expansion system: preferably with expansion tank, (on request, also with integral filling, if the design allows it)
- Cooling: natural or forced, (ONAN, KNAN, ONAN-ONAF, KNAN-KNAF)
- Standards: RE 548, UNE-EN 60076, and technical specifications of companies.
GROUNDING CHOKES
CHARACTERISTICS OF EARTHING CHOKES
- High voltage: up to 36 kV
- Frequency: 50 or 60 Hz
- Connection group: ZN0
- Liquid: mineral oil, or K-type liquids, (silicone, natural or synthetic esters)
- Expansion system: with expansion tank
- Cooling: natural, (ONAN or KNAN)
- Standards: UNE-EN 60076-6 and company technical specifications
REPAIR AND MODIFICATION OF TRANSFORMERS
JARA offers its customers the possibility of repairing transformers of any make, and an approximate estimate can be requested in advance without obligation.
JARA also offers the possibility of carrying out transformer modifications, such as voltage changes.
ACCESSORIES FOR SALE
1 OR 2 CONTACT DIAL THERMOMETER
Control and safety instrument with temperature indicating needle, and with contacts for alarm and tripping
DGTP2® SAFETY RELAY
It applies to integral filling transformers and combines all three protection systems:
– Temperature protection.
– Gas detection.
– Over-pressure protection.
BUCHOLZ SAFETY RELAY
It is a gas detector to be installed in transformers with expansion tank. It has alarm and trip contacts.
SALE OF DIELECTRIC LIQUIDS
– Insulating mineral oil.
– Dielectric liquid silicone.
– Natural or synthetic ester.
DESECADOR DE SILICAGEL
In transformers with an expansion tank, a cartridge with silica gel grains is applied between the expansion tank and the atmosphere in order to absorb moisture from the air circulating through the expansion tank.
SILICA GEL
It is possible to buy this product loose packed in bags of minimum 1kg..
WHEELS
125, 160 and 200mm diameters for distribution transformers, and 250, 270, 300mm diameters for power transformers.
SILENTBLOCKS
Steel and rubber for noise and vibration reduction.
OVERPRESSURE VALVE
In the case of heavy-duty transformers and grounding chokes, an overpressure valve is installed to prevent tank explosion or pressure damage.
OTHER SERVICES
– Analysis of oils for dielectric strength and tangent δ testing.
– Development of test protocols.
