Why is Generator and Electric Motor Testing Essential?

Excitation Tests: Ensuring Your Motor’s Excitement Stays in Check

Excitation in a motor is the process of magnetizing a pole using an electric current on the motor’s coil. This function provides regulated DC current to a generator, which produces an output voltage to the field. An excitation test detects winding problems, damage to the core, inter-turn shorts, and poor electrical connections.

Dielectric Withstand Testing: Pushing Your Motor to Its Limits Safely

The dielectric withstand test is critical for ensuring the safe operation of electrical devices. Dielectric breakdown occurs when insulating material breaks down and becomes a conducting material rather than a protective one. Dielectric withstand testing stresses the insulation in a device beyond the conditions of regular use, often using environmental stressors to see how well the material retains its insulating properties.

Testing Surge Protection Devices: Keeping Your System Safe from Spikes

As their name suggests, Industrial surge protection devices prevent damage to machinery and electrical equipment due to energy spikes. Modern systems use increasingly complex electronics in manufacturing machinery, lighting, data management, and communication devices. Lightning and switching problems can cause an unexpected surge of power to your facility, and regular testing ensures your surge protection devices are up to the task.

Insulation Resistance Testing: Protecting Your System’s Insulation

Insulation protects workers from shocks, short circuits, and other hazards. Insulation resistance testing for your generators provides the same peace of mind as dielectric withstand testing for your motors.

We use a Megohmmeter to test the insulation of any two points separated by electrical insulation. We will test the equipment’s winding resistance to phase and phase to ground. When completed, you’ll know that your team and nearby equipment are safe from these dangers when generators operate.

Partial Discharge Testing: Catching Issues Before They Cause Problems

Partial discharge testing is another assessment of electrical insulation. A partial discharge can occur when part of an insulation system fails to withstand the electricity applied to it. This can create a hazardous situation for people and lead to fire or additional equipment damage. Partial discharge testing identifies potential areas of insulation failure to avoid these problems.

We use a DRLO to run a non-invasive test on the equipment. The partial discharge test can inform our technicians of a loose winding, slot discharge, delamination of the windings, or any other discharges that may occur inside the equipment.

Polarization Index Testing: Digging Deeper into Performance

Polarization index testing is a variation of insulation resistance testing. It is useful for evaluating the windings in a generator for contamination from dirt and moisture, checking for insulation deterioration, and determining the generator’s overall fitness.

This test measures the ratio of the IR after the voltage has been applied for 10 minutes. Its purpose is to investigate the capacitive, conduction, surface leakage, and absorption currents.