NOJA POWER Expands its Type Testing Capabilities
NOJA Power has recently expanded its testing capabilities by introducing two new in-house test laboratories; The Impulse Test Laboratory and the Salt Fog Test Laboratory.
These test laboratories allow NOJA Power Engineers to timely and efficiently type test OSM reclosers under harsh environment simulations, such as heavy salt mist, high humidity coastal areas and thunderstorms.
The new Impulse Test Laboratory is capable of simulating lightning strikes and switching surges in accordance to IEC, ANSI/IEEE international standards. The Impulse Voltage generator is rated at 300 kV (15 kJ) and simulates lightning impulse waveform of 1.2/50 µs.
These in-house facilities provide flexibility to examine and improve existing product design and prove new prototype design concepts which greatly reduces the time and cost of development.
The new Salt Fog Test Laboratory monitors and logs the level of applied voltage, frequency, leakage current, ambient temperature and humidity. Leakage current levels generated by the test objects are automatically recorded for review. This allows Engineers to test against quality standards such as IEC61109 2008 and IEC62217.
The laboratory enclosure is built using graded stainless steel, with glass windows on all four sides to allow Engineers to carefully inspect the test objects. Fog is generated inside the enclosure using ultra sonic mist makers that are able to consistently generate droplets within 5-10 microns. A fan installed within the enclosure ensures the fog density is kept uniform around the test objects.
Levels of salinity are kept within the specified tolerance and are continually monitored and adjusted accordingly.
The main applied voltage can be set to approximately 20kV and is kept within the 5% tolerance set by the standard with the use of an Automatic Voltage Regulator.
These facilities have significantly improved the modelling and type testing procedures of NOJA Power which has ultimately increased the overall reliability and quality of NOJA Power’s recloser products range.