Ultrasound port enables detection of faults in electrical distribution systems and switchgear
VP12 ultrasound port
IRISS has launched the VP12 ultrasound port, which enables technicians to identify potentially hazardous and costly faults, such as arcing, tracking and corona, in electrical distribution systems and switchgear.
According to the company, the system — which can be used for either ultrasound or infrared inspection tasks — provides access to consistent-quality data regardless of the technician’s experience or the enclosure rating.
In ventilated switchgear, the port provides a standardised measurement point, but in NEMA-rated enclosures its effect is said to be even more valuable.
Technicians wearing the appropriate personal protective equipment can collect data on critical, energised equipment in accordance with the safety mandates listed within NFPA70E.
- Body measures 6.5cm in diameter and features a 1.2cm port
- Port is manufactured using non-conductive, UL94 switchgear-grade plastics and insulated to 30kV/mm
- Standard kit includes an infrared transmissive lens for optional and permanent use as an infrared window for small targets or small infrared camera lens apertures
- Alternative grill opening complies with the IP2X standard for maximum hole size in switchgear to prevent the accidental insertion of tools and fingers
- Lockable cover maintains IP65/NEMA 4 seal when closed and the overall unit is impact and flame resistant in line with IEEE standards
The purpose of this paper from IRISS is to educate on the subject of transmission values for infrared windows — does a high value equal more accuracy? Or is knowing the percentage of transmission more important? The paper also discusses transmission values for infrared windows: how does a ‘grill’ affect transmission? Will it make quantitative thermography null and void?
The materials available for infrared (IR) window optics are diverse and have a variety of transmission rates and mechanical strengths. It is advisable that when considering the use of IR windows, you seek advice from IR window manufacturers and IR lens material suppliers before deciding the materials and window styles best suited to your application.
Electrical accidents happen daily; however, there are steps that companies and individuals can take to reduce the occurrence of these accidents and protect everybody concerned from the consequences. The National Fire Protection Association provides, in its regulation 70E, a reference for facilities to meet the requirements of electrical workplace safety and its regulation 70B outlines the best practices for setting up and maintaining an electrical preventative maintenance programme.
You are correct when you state that the grill will affect your measurements. In fact, all infrared (IR) window lenses affect the transmission rate of the target temperature. Regardless of the type of IR window you are using, you need to test and adjust your IR camera for the transmissivity of the lens material you are using. This value can vary by camera even if it is the same make and model of camera. This is due to differences of the detectors in the IR cameras.
IR windows from IRISS give users a quick, efficient way to safely inspect electrical equipment without exposing them to the risk of a hazardous arc flash incident.