ENGINE OF YOUR BUSINESSELEKTROPROMREMONT

We carry out repair of asynchronous electric motors of any complexity, namely:

• Repair of high-voltage asynchronous electric motors with insulation "Monolith";
• Repair of high-voltage asynchronous wedge-free electric motors;
• Repair of high-voltage asynchronous explosion-proof electric motors;
• Repair of asynchronous motors with a phase rotor;
• Repair of asynchronous squirrel-cage electric motors.

Our enterprise offers to repair electric DC motors with power from 5 kW to 10,000 kW, weighing up to 100 tons, for metallurgical enterprises, mining and processing plants, cement enterprises and other companies.

• Repair of rolling large-size direct current electric motors;
• Repair of electric motors of a direct current of an excavator group;
• Repair of direct current generators;
• Repair of crane direct current motors;
• Repair of traction electric motors and traction direct current generators;

Our company offers repair services for low-voltage electric motors with bulk winding power from 1 kW to 320 kW. This nomenclature group includes electric motors with short-circuited and phase rotor for general industrial purposes, crane electric motors, as well as electric motors of imported production.

Mechanical processing

We carry out mechanical processing of worn and damaged parts and components of electrical machines during operation, by means of surfacing and subsequent processing on screw-cutting, milling, drilling and other machines.

We defect, restore and manufacture:

• Seats of bearing shields, axle boxes;
• Seats on the shaft of rotors, anchors;
• Flanges, labyrinth bearing seals;
• Mechanical processing of sliding bearings to the size of the bearing journals of the rotor shaft;
• Defective parts and assemblies.

Balancing rotary equipment

During the operation of electrical parts, increased vibration parameters arise, which over time leads to the destruction of the main components of electrical machines. The imbalance of the system of mechanisms, rotating parts of electrical machines makes up most of the causes causing an increase in vibration parameters.

Our enterprise has the ability to perform both static and dynamic balancing of the rotating parts of electrical machines and mechanisms. The enterprise is equipped with modern balancing devices designed to balance the rotating parts both on the machine and in their own bearings, and specialists performing balancing of the rotating parts have undergone special training in training centers in Ukraine.

We perform static and dynamic balancing of rotor equipment (rotor, anchors, fans, impellers and others) on a balancing machine in the enterprise, as well as at the place of its installation.

The maximum possible mass of the rotating parts for balancing on the machine is 5000 kg, the minimum is 80 kg. The maximum possible length is 2500 mm.

MEASUREMENTS AND TESTS OF ELECTRIC MACHINES.

Diagnostics of electrical machines.

According to the project area measurements applied to the Certificate of technical competence test station, the test station carries out measurements and tests on electrical following parameters:

ELECTRIC ROTATING MACHINES:

• Measurement of the insulation resistance;
• Tests of case insulation with increased voltage of industrial frequency;
• Measurement of resistance of a winding to direct current;
• Testing of winding insulation of windings by pulse voltage;
• Check of work idling;
• Measurement of the vibration of electrical machines;
• Test of active stator iron;
• Measurement of rotational speeds;
• Measurement of bearing temperature.

GROUNDING DEVICES:

• External inspection of the visible part of the grounding device;
• Inspection with a check of the circuit between the ground electrode and grounding elements;
• Measurement of resistance grounding device;
• Measurement of “phase-zero” impedance.

ELECTRICAL INSTALLATIONS, DEVICES, SECONDARY CHAINS AND ELECTRICAL WIRING WITH VOLTAGE UP TO 1000V:

• Measurement of insulation resistance;
• High voltage test of insulation of electrical products, live cable of a hand tool;
• High voltage insulation test of power and lighting wiring;
• Checking the presence of a circuit between grounded installations and elements of the grounding installation;

POWER CABLE LINES:

• Determination of core integrity and phasing;
• Test of high voltage;
• Determination of ground resistance;
• Test of protection operation of machines up to 1000V with grounded neutral.

Stationary and mobile test facilities of various capacities (P = 2.5 kVA, 3.0 kVA, 15 kVA, 35 kVA) allow testing electrical equipment and other devices with an alternating voltage of industrial frequency up to 35 kV, during repairs on the premises, as well as during repairs at the place of installation.

Stationary stands and measuring instruments of the test station make it possible to check the parameters of electric machines with alternating and constant voltage up to and above 1000 V, with power up to and over 1000 kW at idle.

To determine the causes of increased vibration, vibration analyzers are used to make a comprehensive analysis, both in terms of the general level and vibration spectra.

Skilful use of the results of measurements, tests and vibration analysis by specialists of enterprises allows to carry out high-quality diagnostics of an electric machine, thereby preventing its premature failure.