6
3 Product description
B 53-19 • For the signal cable of conductive probes
40490-EN-220516
3 Product description
3.1 Configuration
The scope of delivery encompasses:
•
Overvoltage arrester B53-19
•
Documentation
– This operating instructions manual
– Ex specific safety instructions and, if necessary, further certifi-
cates
The following illustration shows the configuration of the overvoltage
arrester B53-19:
Ty
p B53 - 19
OUT
IN
IP 20
max.
19
VA
C,
27
VDC/1
A
Li < = 0,5 mH / Ci < = 3nF
A1 A2
E1 E2
A3
E3
4
1
2
3
Fig. 1: Configuration of B53-19
1 Terminals Out (protected side)
2 Screw for carrier rail fastening
3 Terminals In (unprotected side)
4 Type label
3.2 Principle of operation
Voltage surges can be caused by indirect atmospheric discharges
(lightning strokes) or switching operations in the supply network.
Further causes can be inductive or capacitive couplings from other
electrical systems. Voltage peaks (transients) must be expected espe-
cially when long power supply and signal cables are used.
Such voltage surges can cause damage to sensors and controllers.
The VEGA overvoltage arrester reduces voltage surges on the supply
or signal cables to a safe level. They are designed for mounting on
Scope of delivery
Constituent parts
Application area