VEGA B63-32 - Manual (Page 6)

6
3 Product description
Overvoltage arresters • B63-48, B63-32
33012-EN-130228
3 Product description
3.1 Configuration
The scope of delivery encompasses:
•
Overvoltage arrester B63-48, B63-32
•
Documentation
– this operating instructions manual
– Ex specific safety instructions and, if necessary, further certifi-
cates
The following illustration shows the structure of B63-48, B63-32:
1
2
3
Fig. 1: Structure of B63-48, B63-32
1 Terminals for the signal cable input (unprotected side)
2 B63-48, B63-32
3 Signal cable output to the sensor (protected side)
3.2 Principle of operation
The overvoltage arresters B63-48, B63-32 are completely enclosed in
a stainless steel housing. They can be used for VEGA level and pres-
sure sensors in two-wire technology.
•
Type B63-48 for 4 … 20 mA/HART sensors
•
Type B63-32 for Profibus PA and Foundation Fieldbus sensors
B63-48, B63-32 overvoltage arresters reduce any voltage surges that
may reach the signal cables to a harmless level. The devices contain
voltage-limiting components as well as gas conductors for bleeding
off impulses of up to 10 kA to ground.
Scope of delivery
Constituent parts
Application area
Functional principle