Compact current relay and
protection assemblies
RXHL 401 and
RAHL 401
1MRK 509 062-BEN
Page 17
Diagrams
Figure 9: Terminal diagram 1MRK 001 083-CBA
Protection
assemblies
Compact current
protection assembly
RAHL
The protection assemblies are of protective
class I equipment in which protection against
electric shock does not rely on basic insula-
tion only, but which includes additional
safety precautions in such a way that accessi-
ble conductive parts are connected to protec-
tive earth. The protections are based on the
compact current relay RXHL. Test device
RTXP 8, RTXP 18 and DC/DC-converter
RXTUG 22H can also be included for spe-
cific application requirements. Test device,
RTXP 8 and RTXP 18 are tools for relay test-
ing. DC/DC-converter RXTUG 22H can be
used either separately for a single protection
or to feed other protections of the same relay
family. With RXTUG 22H all requirements
concerning emission and immunity distur-
bances with this protection assembly will be
met.
The measuring relay has 5 binary outputs and
2 binary inputs. Protections are normally
available with output logic with heavy duty
contacts, relay RXME 18 with indicating
flag, and can upon request be completed with
an output logic of free choice. Output relays
are connected to separate auxiliary voltage.
The interface voltage for enable or block
impulses can be connected to either 48-60 V
DC or 110-220 V DC by connecting the volt-
age circuit to separate terminals. At delivery
all relays are connected for 110-220 V DC.
All the protections in the COMBIFLEX
®
modular system are mounted on apparatus
bars. The connections to the protections are
done by COMBIFLEX
®
socket equipped
leads. All internal connections are made and
the protection assembly is tested before deliv-
ery from factory. The type of modules and
their physical position and the modular size
of the protection are shown in the diagrams of
the respective protection. Figure 10 shows an
example of a protection assembly.
