0274020000 Weidmuller, 0274020000 Datasheet - Page 24
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0274020000
Manufacturer Part Number
0274020000
Description
MK 3/4,4 POLE,KRG,BN
Manufacturer
Weidmuller
Specifications of 0274020000
Rohs Compliant
YES
G
Overview Terminal rails
Terminal rail systems
Both active and passive components and intelligent modules are
mounted on terminal rails – a method which has proven its orth
over the years. But it is only after the use of certain consum-
ables – which are frequently not taken into consideration – that
electrical installation is finally completed. In this chapter, users
will find a range of terminal rails and profile rails for component
installation together with end brackets for holding and isolating
the components. This guarantees firm installation and isolation.
Weidmüller supplies components which show perfect functional
compatibility.
Terminal rails are made of either steel, stainless steel, aluminium,
copper or plastic, depending on the area of application.
Stainless steel
Stainless steel is a collective noun for all kinds of steel (alloys)
which are smelted in a special process and have a high degree
of purity. Stainless steel has much-enhanced resistance to cor-
rosion. Weidmüller’s stainless steel terminal rails have the follow-
ing composition: X5 CrNi 18-10 stainless steel (i.e. ~ 18 % chro-
mium, ~ 10 % nickel).
Aluminium
Aluminium is second only to copper in its electrical conductivity.
One advantage is its light weight. Aluminium oxidises quickly in
air; thus passivated, it offers excellent corrosion protection.
Copper
Copper, a heavy metal, has the best electrical conductivity of all
metals used. As it is a soft metal, Weidmüller’s terminal rails are
2.3 mm thick.
Plastic
The plastic terminal rail scores on two counts: firstly, its insulat-
ing properties, and secondly, its low weight. This leads to its use
in special applications where, for example, clearance and creep-
age distances with respect to the mounting plate cannot be
achieved with the standard terminal rails.
G.24
Steel
Weidmüller started developing RoHS-compliant surfaces at a
very early stage to meet the requirements of EU directives. This
commitment is now paying off because Weidmüller products
comply with the statutory instruments at an early date and
provide you, the customer, with the customary, high Weidmüller
quality. All the yellow-passivated surfaces so well known to
users will in future be replaced by terminal rails with the new
WIN-Q surface finish. This name stands for the Weidmüller
quality, in other words excellent surface protection and, at the
same time, excellent electrical properties.
A terminal rail can also be used as a protective conductor bus-
bar. Weidmüller PE / earth terminals in the W-Series, Z-Series,
I-Series, SAK- and AKZ-Series comply with requirements stipu-
lated in IEC 60 947-7-2. According to VDE 0100 part 540, for
conductors with cross-sectional areas exceeding 10 mm
protective and neutral conductors may be grouped together as
a single category of conductors designated PEN.
If a terminal rail is used as a PEN busbar, the following criteria
must be observed:
• Only E-Cu or aluminium profiles are allowed
• Short-circuit currents and thermal rated currents must be
• The terminal rails are to be insulated as a contribution to
taken into account
protective insulation
2
, both