The standard 61439-2 is valid for an altitude up to 2000m. With altitude the atmosphere is modified, cooling efficiency and dielectric properties are impacted.
When installed above 2000m altitude, Prisma P, G and Linergy BS, LGY, LGYE must be derated for the voltage Ui and current.
- The most impact is on voltage (Ui,Ue). As Ui may decrease significantly with the altitude, it must stay valid for the real Ue.
- About the current, the derating should be applied as per the devices altitude derating. (ie: breakers NSX, NW . . .). these deratings are generally given in devices catalogues and may change, depending the ranges.
For Prisma range of products, deratings are:
More information on the physical phenomena is available in IEC60664 §5.1.2, and “Paschen law” (atmospheric characteristics modified with altitude)
When installed above 2000m altitude, Prisma P, G and Linergy BS, LGY, LGYE must be derated for the voltage Ui and current.
- The most impact is on voltage (Ui,Ue). As Ui may decrease significantly with the altitude, it must stay valid for the real Ue.
- About the current, the derating should be applied as per the devices altitude derating. (ie: breakers NSX, NW . . .). these deratings are generally given in devices catalogues and may change, depending the ranges.
For Prisma range of products, deratings are:
| Altitude | 0-2000 m | up to 3000 m | Up to 4000 m | Up to 5000 m |
| Voltages Ui k= | 1 | 0.88 | 0.78 | 0.68 |
| Current k= | As per installed devices altitude derating | |||
More information on the physical phenomena is available in IEC60664 §5.1.2, and “Paschen law” (atmospheric characteristics modified with altitude)
Publicado para: Schneider Electric España
¿Necesitas ayuda?
Empieza aquí
Encuentra respuestas ahora. Busca una solución por ti mismo, o ponte en contacto con uno de nuestros expertos.
Contacta con el servicio de asistencia
Ponte en contacto con nuestro equipo de atención al cliente para recibir información, soporte técnico, asistencia para reclamaciones y mucho más.
¿Dónde comprar?
Encuentra fácilmente el distribuidor de Schneider Electric más cercano a tu ubicación.
Buscar preguntas frecuentes
Obtén las respuestas que necesitas examinando las preguntas frecuentes (FAQ) relacionadas con los temas.
Contacto con el servicio de ventas
Comienza tu consulta de ventas on-line y un experto se pondrá en contacto contigo.
