POWER SYSTEM PROTECTION
- Coordination and calculation of Adjustments of the electrical protections of substations, power plants and transmission lines.
- Protection relay calibration.
- Studies of load flow and short circuit through specialized software
ELECTRICAL TESTS FOR HIGH VOLTAGE EQUIPMENT
POWER TRANSFORMERS
- Tests for insulation in alternating current, power factor and / or dissipation and measurement of capacitances between windings, windings and capacitive bushings.
- Measurement of power factor to dielectric oil
- Measurement of excitation current
- Transformation relationship test
- Measurement of ohmic resistance to primary and secondary windings. If the transformer has a tap-changer under load, the dynamic resistance test is carried out by checking the status of the switch contacts under load.
- Direct current insulation tests
- Measurement of dispersion reactance and short-circuit impedance
POWER SWITCHES
- Insulation tests.
- Measurement of operating times.
- Measurement of the displacement, overtravel, penetration, rebound and speed of the movable contacts of the switch during each closing and opening operation.
- Measurement of ohmic resistance of the main contacts
CURRENT TRANSFORMERS
- Tests of power factor and / or dissipation and capacitance
- Insulation resistance tests
- Test of relation, load and polarity
- Phase and magnitude error
- Saturation test
- Measurement of ohmic resistance to windings
- Measurement of secondary load
VOLTAGE TRANSFORMERS
- Power factor and dissipation and capacitance tests
- Excitation current (inductive voltage transformers)
- Insulation resistance tests
- Polarity conversion ratio test
- Phase and magnitude error
- Measurement of secondary load
GENERATORS
- Power factor and dissipation tests
- Tip-up and Tip-down
- Measurement of capacitance
- Measurement of insulation resistance
- Calculation of the polarization index
- Measurement of ohmic resistance
APARTMENTS, SECTIONERS, SUPPORT INSULATORS AND ANY OTHER HIGH VOLTAGE EQUIPMENT.
All test equipment has their respective calibration certificates valid and traceable to electrical standards maintained in the PTB of Germany, OEEV of Austria or NIST of the USA.
POWER TRANSFORMERS: INSTALLATION AND MAINTENANCE.
- Mechanical and electrical assembly.
- Armed and put into service.
- Thermo vacuum processes and filling.
- Drying process to dielectric oil.
- Regenerated process to dielectric oil through the use of fuller earth.
- Field tests for transformer oil.
- Routine monitoring tests to dielectric oil of transformers in service.
- Exploratory tests to transformer dielectric oil
- Monitoring and diagnostic tests for transformer oil.
- Field tests for transformer oil.
- All transformer oil tests are based on ASTM standards.
POWER TRANSFORMERS: ELECTRICAL TESTS TO HIGH VOLTAGE EQUIPMENT.
- Alternating current insulation tests (power and / or dissipation factor, capacitance measurement between windings, ground windings and capacitive bushings).
- Power factor measurement to dielectric oil.
- Measurement of excitation current.
- Transformation relationship tests.
- Measurement of ohmic resistance to primary and secondary windings.
- If the transformer has a tap changer under load, the dynamic resistance test is carried out, in order to verify the status of the contacts of the switch under load.
- Direct current insulation tests.
- Measurement of scattering reactance and short circuit impedance.
CAPACITOR BANKS:
- Discharge test to battery banks.
- Impedance measurement to battery banks.
SPECIAL TESTS TO DIELECTRIC FLUIDS FOR:
- Transformers of critical operation immersed in oil.
- Power transformers immersed in oil.
- Distribution transformers immersed in oil.
- Power transformers immersed in special fluids other than oil.
- Tap changer under load immersed in oil.