Electrical Insulation Systems often must withstand sudden overvoltage conditions caused by atmospheric conditions (such as lightning strikes), from commonly expected standard-duty-cycle situations (such as low-voltage or high-voltage equipment switching operations), or by random high-voltage transients through AC-DC inverter output (such as with DC electric motors.) High-Voltage Impulse Testing evaluates the ability of Electrical Insulation Systems to withstand such high-voltage impulses in applications including transformers, motors, coils, cables, switches, circuit breakers, surge protection devices, individual insulation materials, and a multitude of other products.
ELTEK Laboratories has an EMC – Partner MIG4803 Impulse Tester. (The following description is direct from the EMC – Partner Literature; for more details, please contact EMC-Partner).
ELTEK Labs can test papers, films, injection molding resins, cable jacketing, magnet wire/winding wire insulation, tapes, sleevings, and just about any material with impulses up to 48kV. ELTEK has the capability to run IEC 62068 test standard, among others.
The EMC – Partner MIG4803 Impulse Tester meets the IEEE and IEC definitions of a standardized impulse voltage application. Refer to the performance specifications below.
MIG4803 Impulse Tester
Impulse Voltage 1.2/50μs
- Voltage range 2 up to 48kV
- Voltage increment 3 digit plus comma
- Impulse capacitor 10μF
- Source Impedance 50 Ω
- Pulse front time 1.2 μs
- Pulse duration 50 μs
- Polarity positive, negative, alternating
Combination Wave 1.2/50μs (8/20μs)
- Voltage range 0.25 up to 6kV
- Impulse capacitor 10μF
- Source Impedance 2 Ω
- Maximum energy 180 Joule
- Pulse front time 1.2 μs
- Pulse duration 50 μs
- Short circuit waveshape 8/20 μs
- Polarity positive, negative, alternating
Impulse Voltage 1.2/50μs
- Voltage range 0.25 up to 6kV
- Impulse capacitor 10μF
- Source Impedance 50 Ω
- Maximum energy 180 Joule
- Pulse front time 1.2 μs
- Pulse duration 50 μs
- Polarity positive, negative, alternating
Impulse testing applies to evaluation of various Electrical Insulating Materials (EIM) and Electrical Insulation System (EIS).
Impulse testing can also be performed on motors, generators, or transformers within the above limits of impulse stress and within limits of the size and configuration of the product.
For more details or to arrange impulse testing, contact ELTEK Sales Group.
