Karel MS26S, Инструкция по установке и обслуживанию, Страница: 25 / 62

Karel MS26s Installation & Maintenance Guide
Edition 3.1
19
II.8. FILTER & PROTECTION UNIT – FPBASE, FPEXP
The external lines that are connected to the system and the extension lines coming
from other buildings are open to any environmental effects like lightning or AM
radio interference.
In order to protect the system against lightning and radio interference, KAREL has
external units that can be connected to both extensions and lines. These units are
presented in two different models:
a) FPBASE Filter & Protection Base Unit
b) FPEXP Filter & Protection Expansion Unit
Both units are capable of handling four lines. The difference between FPBASE and
FPEXP is the base cover, which exists only on FPBASE unit. FPEXP units are
installed on top of an FPBASE unit. So, if a Filter and Protection Unit is required for
a system then an FPBASE unit must be used and depending on the capacity of the
ports that must be filtered and protected, any number of FPEXP units can be
added.
The outlook and structure of FPBASE and FPEXP units are illustrated in the
following figure:
Figure A-15
The dimensions of the FPBASE are 18 cm x 12 cm x 3 cm and the weight is 0.4 kg.
The dimensions of the FPEXP are 17 cm x 12 cm x 2.5 cm and the weight is 0.3
kg.
IMPORTANT
It is not recommended to connect FPBASE and FPEXP units to lines which have
metering pulses, against the risk of metering pulses being suppressed by the
filter elements. Instead, the SPBASE and SPEXP units can be connected to such
lines for protection against high voltage.