Screens (Shields) are often used in Instrumentation and signal cables to prevent or decrease possible interference/ noise in cables that can be caused by following reasons:
- Cross-talk from adjacent pairs or triads
- Interference induced by external source such as electrical equipment's machineries and powerlines.
SCREEN TYPES
- Aluminum/ polyester tape with a tinned copper drain wire, the most common construction
- Copper/ polyester tape with a tinned copper drain wire, for a superior screen effect.
- Bare copper braid, for electromagnetic interference/ noise or when the cable is subject to movements.
- Tinned copper braid for electromagnetic interference in existence of corrosive atmosphere.
