SBC PCD1 Series Manual page 282

Saia-Burgess Controls AG
The resistors used must withstand high voltages (pulse stability). With low resistance
values in particular, voltage flashovers can occur at the ground helical section pro-
duced in the manufacturing process. For this reason, composite carbon resistors are
often used in screening units. However, enamelled wire resistors or cement resistors
with a large helical pitch are suitable.
Dimensioning guide:
The value for C is the direct result of the switching current. The resistance value R can
be established by drawing a straight line through the corresponding points on the I and U
curves and reading off the resistance at the intersection with the R curve.
Example:
U = 100 V
C is direct result with 0,1 μF
R = 10 Ω (point of intersection with R scale)
Manual Manual PCD 1 / PCD 2 Series │ D ocument 26 / 737 EN22 │ 2 013-11-26
I = 1 A
Installation direction and relays contact protection
Load
Appendix
A
A-9