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2010 CA08103002Z-EN
www.eaton.com18/44 IZM circuit-breakers, IN switch-disconnectors
IZM26 air circuit-breakers, Switch-disconnector IN26
IZM26aircircuit-breakers,Switch-disconnector IN26
IZM26: Robust safety
Eaton's IZM26 circuit-breakers offer
a proven and complete range of air
circuit-breakers up to 6300 A. Four
sizes enable the ideal circuit-breaker
to be selected economically for any
project. In this way, only the module
width increases with the required
rated operational current, enabling the
most compact and economical size to
be selected.
The particularly rugged circuit-break-
ers are already in use 100,000 times in
harsh industrial environments world-
wide. Large material thicknesses and
a high short-time withstand current
are its characteristic features.
Applications
The circuit-breakers can be used in
four main application areas depending
on the type of equipment to be
protected:
• System protection,
• Motor protection,
• Transformer protection,
• Generator protection.
These key applications make different
demands on the switches, which are
met with a range of trip units.
Switches with closing release
They are particularly suitable for
synchronization tasks.
Coupler switches
Beside the IZM26 circuit-breakers,
IN26 switch-disconnectors are
available. These are used, for
example, as coupler switches
between different power supplies.
Modular design
Because components are installed
from the front, retrofitting accessories
is especially quick and easy. This
allows flexible response to changing
requirements within the system.
Standard scope of delivery
as usual
• With the new IZM26, you also select
a basic device that is already fitted
with an electronic release and
horizontal terminal adapters.
• The standard mounting is on a
horizontal mounting plate or on
horizontal traverses in the switching
cabinet.
• With four-pole devices, the neutral
conductor is arranged on the left
(front view).
• The neutral conductor can be
loaded 100% like the phase
conductors.
• The circuit-breakers are provided
with a standard mechanical
reclosing lockout. After an overload
trip, the fault is usually examined
first of all. After the fault is identified
and rectified, the mechanical
reclosing lockout is reset by
pressing the red mechanical trip
indicator on the front of the circuit-
breaker.
• An “Automatic Reset” can be
ordered as an option. This enables
the circuit-breaker to be restored to
operation immediately at any time
after the spring-operated stored
energy mechanism is retensioned.
In these applications compulsory
fault analysis is intentionally
avoided.
• The number of control cable
terminals depends on the
accessories fitted.
• If a cassette is ordered without the
basic device, this is already fitted
with themaximumnumber of control
cable terminals.
• The standard consists of 2 NO
contacts and 2 NC contacts for
ON/OFF status indication.
• A coding mechanism between the
basic device and the cassette pre-
vents impermissible combinations
(“Rejection Interlock”).
Expansion of Standardequipment
supplied for IZM26
Some order types from the past can no
longer be found since the following
options are now already part of the
standard scope of delivery:
• The door escutcheon is now always
included in the scope of delivery.
With withdrawable designs this is
supplied with the cassette (with-
drawable unit).
• On withdrawable units the circuit-
breaker can be pulled out to inspect
the arc chutes. With fixed units, it is
recommended that sufficient space
is provided above the circuit-
breaker to enable inspection.
An additional cover is not required.
• All basic devices that are provided
with universal protection (with
Digitrip 520M…), now feature a
display.
• On each circuit-breaker the
integrated Digitrip electronic
release is factory fitted with a
sealable protective cover.
• If a motor operator is ordered, the
“Spring-operated stored energy
mechanism tensioned” indicator
switch is automatically provided.