ELECTRICAL LABORATORY AND ENERGY AUDIT
SCOPE AND FUNCTIONS OF THE LABORATORY
- Acceptance tests. Carried out after the installation of new electrical equipment;
- Preventive measurements. They prevent the failure of expensive equipment, help control the safety of personnel;
- Periodic measurements. Needed to control the operation of electrical equipment and electrical networks;
- Energy audit of electrical systems. They control the quality of electrical energy, make it possible to obtain complete information about the state of the power system to promptly identify any problems associated with interruptions in the operation of electrical installations.
EQUIPMENT AND TYPES OF WORK
- Power quality analyzer Fluke 435 II (USA);
- Multifunctional high-voltage testing device Metrel MI 2094 CE Multitester (Slovenia);
- Test rig for testing relay protection and automation devices and power equipment of the RTS-A series (Ukraine);
- Automatic circuit breakers loading device - UPA-16 (Ukraine);
- Schneider Electric test rig for STR, ET and Micrologic trip units (USA);
- Digital megohmmeter E6-24 (Russia);
- Digital earth resistance meter TsS4107 (Ukraine);
- Phase-zero digital loop resistance meter EP180M1 (Ukraine);
- Digital microohmmeter EP331 (Ukraine);
- High-voltage test apparatus AV-50/70 (Ukraine)
- High-voltage test apparatus AV-45-0.1 (Ukraine)
- Set of measuring parameters of power transformers K540-4PS (Ukraine)
- Voltamperphase meter digital Retometer-M3 (Russia)
- High-voltage test stand for testing personal protective equipment (Ukraine)
- Other.
- Power and measuring transformers;
- Power capacitors;
- Power cable lines;
- Contact connections of collecting and connecting buses, wires and lightning protection cables;
- Power switches, load break switches, disconnectors;
- AC motors;
- Complete indoor and outdoor switchgears;
- Grounding devices;
- Electrical installations, apparatus, secondary circuits and wiring for voltages up to 1 kV;
- Low-voltage switchgears, etc.
- Insulation resistance;
- Resistance of the grounding system;
- Resistance of transformer windings;
- Transitional resistances;
- Loop resistance "phase-zero";
- Measuring the capacitance of capacitors.
- Switching equipment;
- Control points of magnetization characteristics;
- Dielectric tests, etc.
- Safety of personnel against electric shock;
- Fire safety;
- Uninterrupted operation of electrical equipment and apparatus;
- Timely detection and prompt elimination of equipment and network malfunctions;
- Submission of all necessary protocols and reports to supervisory authorities.
ENERGY AUDIT AND DEVIATIONS OF POWER QUALITY INDICATORS
Power quality analysis
is a modern, most objective, fast, and convenient way to get complete information about the state of the power system and identify any problems associated with interruptions in the operation of electrical installations!
Deviations of the power quality indicators from the standardized values lead to a deterioration in the operating conditions of electrical equipment and its premature wear or failure.
Voltage deviation
For example, it affects the operation of asynchronous motors, which are widely used in many areas of the economy and the economy. With a decrease in the supply voltage, the torque on the motor shaft decreases, which under certain conditions can lead to a complete stop of the motor. In addition, undervoltage reduces the starting torque, which worsens the starting conditions of the engine. The increased voltage at the motor terminals leads to an increase in the consumed reactive power. On average, for each percentage increase in the network voltage, the reactive power consumption increases by 3%.
Voltage fluctuations
Significantly affect the operation of lighting devices and electronic equipment. Blinking of light sources (flicker effect) causes an unpleasant psychological effect, fatigue of vision and the body as a whole. This leads to a decrease in labor productivity, and in some cases to injury. With significant voltage fluctuations (more than 15%), the conditions for the normal operation of electric motors may be violated, the contacts of magnetic starters may fall off with a corresponding shutdown of the running motors. Voltage fluctuations with a swing of 10-15% can lead to failure of the capacitor banks.
Voltage harmonic distortion
They lead to additional heating in transformers, create additional losses in busbars, cause overheating and destruction of neutral working conductors, worsen working conditions and disable capacitor banks.
Electromagnetic interference
Lead to equipment failures, malfunction of automation devices, relay protection, and loss of information. Special attention is paid to this problem by various data centers, scientific laboratories, and other facilities for which data preservation is a primary task.
All of the above deviations can lead to varying degrees of severity of the damage. Therefore, knowledge of the real indicators of the quality of electricity at the enterprise is really important and will allow you to detect and localize problem areas. Using modern measuring devices, and specialists, our company will help to detect and identify problems and threats. The range of measured values depends on the purpose of the monitoring.
- Customer survey, analysis of technical documentation;
- Conclusion of a contract for the performance of work on the analysis of the quality of electricity;
- Departure to the site and carrying out the necessary measurements;
- Processing and analysis of the received data;
- Formation of detailed reports for the customer;
- Providing recommendations and selection of the necessary equipment to eliminate problems in the power system of the enterprise.
- Steady-state voltage deviation;
- Voltage swing;
- Distortion factor of sinusoidal voltage curve;
- Coefficient of the n-th harmonic component of voltage;
- Negative sequence voltage unbalance factor;
- Zero sequence voltage unbalance coefficient;
- Frequency deviation;
- Duration of voltage dip;
- Impulse voltage;
- Temporary overvoltage factor.