Integrating, esting,t and ensuring the operability of substation equipment

To help clients maintain focus on their core business, Engetecnica makes its expertise available for managing undertakings dedicated to the supply of electric power.

Thanks to its organizational structure and multidisciplinary professionals, Engetecnica has the capacity to carry out management and integration of projects such as the complete construction of power substations, electrical power systems and expansion/adaptation of existing systems.

How We Do It

Commissioning and Integration Process

Learn about Engetecnica Service’s working process

In this phase, using state-of-the-art equipment, we perform a set of tests according to national and international standards, ensuring the integrity and good performance of the equipment over time.

In this phase, all the electrical circuits of command, signaling, interlocking, and tripping are verified

In this phase, the parameterization of the relays is verified, according to the selectivity study provided for the undertaking.

In this phase, the integrated tests are performed, checking the facilities according to the functional and logical electrical projects, interlocking, automation, local control and telecommand, checking the voltage and current circuits.

With the commissioning approved, our team accompanies the energization of the undertaking, ensuring the installation’s performance.


Courtyard Equipment Commissioning

  • Voltage control relay calibration and adjustments

  • Thermal image calibration and adjustment

  • Excitation current

  • Motor starting currents and steady state

  • Bushing CT testing and trials

  • Winding insulation power factor.

  • Insulation power factor and bushing capacitance.

  • Forced cooling operation.

  • Visual inspection

  • Insulating oil: Taking and sending oil sample to the laboratory for routine tests and tests and dissolved gases from the main tank and the switchgear.

  • Voltage ratio.

  • Insulation Resistance of the insulating fiber that is between the base and the power transformer.

  • Insulation resistance of the core (when there is access that allows this test and assay).

  • Winding Insulation Resistance.

  • Motors’ Insulation Resistance.

  • Electrical resistance (continuity) between the connector and the condensing bushing head.

  • Electrical resistance of the grounding cables of the neutral bushing.

  • Electrical resistance of the windings in all derivations.

  • Verification of operation, by adjustment and measurement of insulation and contact resistances, of all physical instruments such as: gas relay, oil and winding thermometer, oil level indicator, pressure valves and thermostats.

  • Adjustment and measurement of the pressurization of hydraulic and gas circuits, pressure switches and pressure gauges.

  • Tank loss index (TLI) calculation in GVO circuit breakers.

  • Hot collar of GVO circuit breaker bushings and 13.8 kV cubicle bushings.

  • Starting and permanent regime currents of the motors.

  • cubicle circuit breakers.

  • Tests and trials of the bushing CT or cubicle CT, as indicated in the items referring to the Current Transformer of this specification.

  • Gas tightness.

  • Insulation Power Factor.

  • Visual inspection

  • Insulating oil (GVO and PVO circuit breakers): Removal and sending of oil sample to the laboratory for routine tests and assays.

  • Contact Resistance of all chambers and total.

  • Insulation resistance of the motors

  • Insulation resistance and electrical resistance of the opening and closing coils.

  • Isolation Resistance.

  • Electrical Resistance between the input and output bushings of the resort loading time.

  • Pressurization time and start/stop pressure of the hydraulic control pump.

  • Operation times (O, C, CO, OCO) of chambers and pre-insertion resistor across all opening coils. NOTE: Monitor the energization times of the coils or auxiliary contacts in the OCO test.

  • Moisture content (PPM) of SF6 gas.

  • Grounding connections (Mechanism for the structure and Structure for the mesh)

  • Starting currents and permanent regime of the motors.

  • Visual inspection. According to equipment specific inspection sheet.

  • Contact Resistance (Total, Joints, and Contacts).

  • Insulation Resistance of each insulator and total.

  • Insulation resistance of the motor.

  • Opening and closing times.

  • Power factor of the winding insulation.

  • Visual inspection.

  • Polarity.

  • Voltage ratio.

  • Insulation resistance of the windings. Electrical resistance of the windings in all derivations.

  • Insulation power factor.

  • Visual inspection

  • Saturation curve survey (For Polarity. Protection secondary).

  • Current ratio.

  • Insulation Resistance.

  • Electrical resistance of the windings from the beginning of the winding to all shunts.

  • Actuation of the discharge counters.

  • Insulation power factor (losses in mW/W).

  • Visual inspection

  • Measurement of the electrical resistance of the lightning rod grounding cable connection and its respective grounding rod.

  • Insulation resistance of the insulating bases.

  • Insulation resistance.

  • Capacitance of each unit and total of each phase.

  • Visual inspection

  • Insulation resistance of the racks.

  • Insulation resistance of each capacitor.

  • Discharge resistor’s electrical resistance (A1xA2).

  • Inductance

  • Visual inspection

  • Coil lightning rods

  • Insulation resistance of each insulator and total.

  • Electrical resistance.

  • Insulation Power Factor

  • Visual inspection

  • Insulation resistance

  • Direct Current applied voltage.

Auxiliary Service Equipment Commissioning

  • Equalization charge, if necessary.

  • Discharge and recharge cycle (Capacity Test in the installation’s designed regime).

  • Complementary tests and trials according to the manufacturer’s manual.

    Visual inspection.

  • Electrolyte density measurement of each element (for vented batteries only).

  • Voltage measurement of each element.

  • Internal ohmic measurement of each cell (conductance or impedance or internal resistance).

  • Checking the gauges of the cables used in the assembly and connection of the battery to the rectifier.

  • Checking the tightening torque of the connection screws of the poles of each element.

  • Instrument gauging

  • Results analysis

  • Plate data annotation

  • Tests and trials according to the manufacturer’s instruction manual and or the CONTRACTOR’s specific instructions.

    Visual inspection.

  • C.C. insulation.

  • Fault simulation

  • Falling diode columns operation simulation (if any)

  • Residual voltage (ripple)

  • Current limiting test

  • Input voltage variation test (regulation)

  • Verification of the range and the adjustment value of the protection and/or signaling of high voltage at consumption

  • Range verification and setting value of the protection and/or signaling of low voltage in consumption

  • Range verification and adjustment value of the output voltage in recharge

  • Checking of the range and the adjustment value of the output voltage in floating mode

  • Checking the acoustic and visual signaling

  • Checking the input voltage and protection devices in the QDR (fuses, circuit breakers, etc.)

  • Verification of polarities

  • Verification of operation in manual and automatic

  • Verification of over temperature rise

  • Verification of the sizing of fuses and cables used in the AC supply and DC distribution to batteries and consumers.

  • Verification of the operation of the C.A. and C.C. switches

  • Verification of the tightening torques of the connections

  • Insulation power factor.

  • Insulating oil: Taking and sending oil samples to the laboratory for routine tests and tests and dissolved gases.

  • Voltage ratio.

  • Winding insulation resistance.

  • Winding electrical resistance.

Protection and Control Panels Commissioning

  • Protection and Measurement Philosophy Analysis

  • Heating System Analysis

  • Results Analysis

  • Board data annotation

  • CT circuit current application

  • Voltage application on VT’s circuit

  • Continuity and interconnection

  • Wiring isolation

  • Fuse checking

  • Checking Signalers, Control Switches

  • Actuate the protections on relay 86
  • Identify the fuses, DC circuit breaker and protection switch
  • Check the circuit-breaker opening and locking
  • Check existence of flex-test and key 69
  • Check existence of trip transfer
  • Check signaling in reset position
  • Check signaling: relay-announcer-breaker

Equipment Reference

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