Configuration
6.1 Basic knowledge for configuring
SIVACON 8PS - Configuring with LX system
98 Configuration Manual, 10/2011, A5E02194899-02
6.1.4 Tap-off units
Overview
● Sheet steel enclosure, painted
● Five sizes
● Degree of protection IP54, increased to IP55 with installation kit
● To 630 A, can be connected under load
● From 800 A, cannot be connected under load
● When used in TN-C systems, a PEN jumper must always be allowed for in the tap-off unit
up to 630 A (PEN jumper included in scope of delivery).
Sizes and cable entry sides
Size Tap-off unit with circuit breaker Tap-off unit with fuse switch
disconnector
1 ≤ 250 A ≤ 250 A
2 315...630 A 400 A
3 — 630 A
4 800...1250 A —
Power tap-off, mounting and safety features
Tap-off units of sizes 1 to 3 (to 630 A):
● Tap-off is carried out by means of silver-plated Lyra contacts of the current tap-off system
at the tap-off unit.
● Can be connected under load
1)
, that is, the LX system does not have to be switched off-
load to install or remove the tap-off units.
● Installing the tap-off units by opening the tap-off unit, fixing on the LX system, connecting
the cable and closing the tap-off unit
● Leading PE or PEN conductor contact
● Anti-rotation feature prevents incorrect mounting
● Touch protection IP20 during the installation procedure at the tap-off point as well as for
all load-carrying parts in the tap-off unit
● Freedom from load thanks to a mandatory sequence of operations when installing and
uninstalling
● Cable insertion safety thanks to partitioning of the current tap-off space from the cable
space.
1)
Please observe national regulations.