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2021-06-09 / V1.0
Contactors CPP series – Installation and Maintenance Manual
Product information
4. Product information
4.1 CPP – 1-pole NO or NC contactors
for DC or AC
Compact single-pole NO and NC contactors up to
3,600 volts rated insulation voltage. Making current
up to 2,000 amps; conventional thermal current up to
200 amps; short-time currents up to 2,000 amps.
The super-compact DC contactors of the CPP series are
the smallest Schaltbau switching devices in the power
class up to 200 amps and suitable for rated operating
voltages up to 3,000 volts. The single-pole switching
devices are available as NO or NC contactors.
They are used in main and auxiliary converters of rail-
way vehicles, but also in converters and inverters in the
field of renewable energies or, more generally, in indus-
trial environments.
4.2 Features
X
Compact dimensions – high rated insulation
voltage U
Nm
up to 3,600 volts
Small dimensions – great performance! All air gaps
in the contact area are generously dimensioned.
The rated insulation voltage is 3,600 volts for OV2
and 3,000 volts for OV3. A highly efficient ceramic
arc chamber with permanent magnetic blowout
is used to handle arcs.
X
High making capacity I
cm
of up to 2,000 amps
The CPP can switch on currents of up to 2,000
amps in the make contactor version. In the version
as a break contactor, up to 850 amps. High contact
forces and optimised silver contacts favour the ex-
cellent breaking capacity.
X
High thermal continuous current I
th
of up
200 amps
The CPP series can permanently carry currents of
up to 200 amps in the NO contactor version. In the
version as a NC contactor, currents of 120 amps
can be carried. Connection cross-section: NO
contactor 120 mm², NC contactor 35 mm², maxi-
mum ambient temperature: 70 °C. The values are
achieved through high contact forces.
X
High short-time withstand current rating I
cw
of up to 2,000 amps
For 100 milliseconds, the normally open contact
can carry a maximum current of 2,000 amps. The
short-circuit current carrying capacity of the NC
contact is 1,800 amps. This time is sufficient to trig-
ger the short-circuit protection and prevent weld-
ing of the main contacts. The short-time current
carrying capacity is supported by high contact
forces and optimised silver contacts.
X
Auxiliary contacts with snap-action switches
Two S870 series auxiliary switches are optionally
available for extensive diagnostics and switching
condition monitoring.
The switches have robust silver or gold contacts.
4.3 Reliable, robust and economical
Contactors of the CPP series are designed for continu-
ous currents up to 200 A. Among other features, the
robust switchgear has a high breaking and breaking
capacity as well as a high short-time rated current. This
ensures long operational reliability. Depending on the
application, different requirements are placed on elec-
tromechanical components.
The new DC contactors are very robust against shock
and vibration loads and meet the requirements of
IEC 60077.
