Tests

We carry out tests, measurements and check the functional characteristics and properties of high voltage AC switchgear and distribution gear products and check the compliance of these products with the requirements of the relevant standards in terms of type testing and special tests, environmental tests and IP, IK protection rating to the full extent.

We perform the following tests:

• insulation testing with DC, AC and surge voltages in dry and rain conditions
• testing dielectric properties
• check of temperature increase
• checking the making capacity of the equipment with regard to rated, switching, critical and short-circuit and overload current
• short-time strength and n-second current tests
• dynamic strength test with peak current
• testing the effectiveness and short-circuit strength of protective circuits
• testing the internal arc resistance
• testing the time-current characteristics
• testing the operation of triggers and relays
• testing of fuses with lower and upper test current
• environmental tests at various exposures
• testing protection rating provided by enclosures (up to IP68)
• mechanical impact test (up to IK10)
• check of mechanical durability
• check of air and surface insulation gaps
• geometric measurements
• corrosion resistance in salt spray atmosphere

We perform the following tests:

• insulation testing with DC, AC and surge voltages in dry and rain conditions
• testing dielectric properties
• check of temperature increase
• checking the making capacity of the equipment with regard to rated, switching, critical and short-circuit and overload current
• short-time strength and n-second current tests
• dynamic strength test with peak current
• testing the effectiveness and short-circuit strength of protective circuits
• testing the internal arc resistance
• testing the time-current characteristics
• testing the operation of triggers and relays
• testing of fuses with lower and upper test current
• environmental tests at various exposures
• testing protection rating provided by enclosures (up to IP68)
• mechanical impact test (up to IK10)
• testing the mechanical strength of enclosures
• check of mechanical durability
• testing resistance to incresed temperature (ball pressure)
• check of air and surface insulation gaps
• geometric measurements
• corrosion resistance in salt spray atmosphere

• Sound testing of electrical products and equipment, toys, electronic products and equipment
• Electrical testing of electrical products and equipment, medical equipment, optical products, toys, electronic products and equipment
• Electromagnetic compatibility (EMC) testing of electrical products and equipment, machinery and appliances, medical equipment, toys, electronic products and equipment
• Fire testing of electrical products and equipment, medical equipment, plastic products, electronic products and equipment
• Mechanical testing of electrical products and equipment, medical equipment, optical equipment, toys, electronic products and equipment
• Testing of the physical properties of electrical products and equipment, medical equipment, building structures, optical equipment, toys, electronic products and equipment

Scope of EMC testing:

• continuous conducted emission 9 kHz to 30 MHz
• disturbance power 30 MHz to 300 MHz
• voltage fluctuations and flicker
• current harmonic analysis up to 39th harmonic
• radiated electromagnetic disturbance from lighting equipment in the 9 kHz to 30 MHz band
• immunity to electrostatic discharge (ESD) contact and in air up to ±30 kV
• immunity to electrical fast transient/burst
• immunity to surges up to 15 kV
• immunity to conducted radio frequency induced disturbances
• immunity to mains frequency magnetic fields
• immunity to pulsed magnetic fields
• immunity to asymmetric conducted disturbances from 0 Hz to 150 kHz
• immunity to damped oscillation waves
• immunity to low-frequency disturbances
• immunity to voltage fluctuations, voltage changes, blackouts and short power failures
• immunity to the presence of a variable component in the fixed supply voltage
• immunity to mains frequency variation.

We offer calibration services in the following areas:

• DC voltage (7.01) and DC current (7.02),
• AC voltage (7.03) and AC current (7.04),
• DC resistance (7.05) and AC resistance (7.06),
• High voltage and current (7.14),
• Lighting intensity (16.06),

We offer these services in our facility (S) and outside (P).

Scope of tests:

• testing of cables and winding wires
• testing the mechanical properties of metals
• testing the electrical properties of electrical insulating materials
• electrical strength testing of electrotechnical products (coatings and insulation)
• resistance testing of electrotechnical products
• testing flammability of plastics
• testing flammability of electrical insulating materials
• testing flammability of electrical insulating materials
• testing of flammability categories of electrical insulating materials
• testing resistance to environment – climatic tests
• insolation resistance test
• testing of protective electrical insulation equipment
• testing the properties of ceramic and glass materials
• testing of composite insulators
• testing of polymeric insulators
• testing of ceramic insulators for overhead lines
• testing of low-voltage ceramic insulators
• testing of non-directional surge arresters

We perform the following tests:

• traction rectifiers,
• power semiconductor devices,
• inverters,
• drives, power compensators,
• power electronic network couplings,
• other electricity-converting or storing devices,
• static converters

The tests cover electrical machines (motors and generators) and the associated inverter systems. The tests include:

– electric motors and generators:

• with a power output of up to 680 kW at up to 1,480 ^rpm, a voltage of up to 6 kV and a frequency of 50 Hz
• with a power output of up to 200 kW at up to 2,000 ^rpm, a voltage of up to 660 V and a frequency of 0-65 Hz
• with a power output of up to 160 kW at up to 2,800 ^rpm, a voltage of up to 660 V and a frequency of 0-65 Hz
• with a power output of up to 30 kW at up to 18,000 ^rpm, a voltage of up to 660 V and a frequency of 0-65 Hz

– electric drives with power inverters supplied with DC voltage up to 1 kV at up to 600 A. This includes tests of the following equipment:

• industrial drives
• powertrains for motor vehicles and single-track vehicles
• drone aircraft propulsion systems
• boat drives

Scope of electrical machine testing:

• measurement of insulation resistance of windings
• measurement of winding resistance
• idling test and loss at idle
• heating test
• locked rotor test
• determination of efficiency
• determination of mechanical characteristics of drive systems
• mechanical strength test at increased speed
• torque overload test
• IP rating tests
• measurement of sound power level
• vibration intensity measurement

List of possible tests:

• testing of low-voltage SPD surge arresters for AC and DC networks,
• testing of surge arresters for AC and DC networks and railway applications,
• testing of VLD voltage limiters
• varistor ageing tests;

The scope of testing performed concerning the work of the LSE Laboratory – AC and DC surge arresters – is covered by the CAE laboratory accreditation.