9
10/09 AWB1230-1605
Effective October 2009
Operation and maintenance of
IZM low voltage air circuit breakers
MOELLER
www.moeller.net/de/support
Section 2: Receiving, handling,
and installation
General information
IZM air circuit breakers, when supplied as part of an assembly,
may be shipped already installed in their respective breaker
compartments. Receiving and handling of this equipment is
addressed in an assembly instruction manual supplied with the
assembled equipment. This instruction manual applies to only
the circuit breakers.
Suggested tools
A large number of different tools are not required to properly
install and maintain IZM circuit breakers. The following tools are,
however, suggested:
•
Flat-blade screwdriver
•
Phillips head screwdriver
•
3/8-inch socket (ratchet) wrench
•
10 mm socket
•
17 mm socket
•
Secondary wiring removal tool
Unpacking circuit breaker
Before beginning to unpack new IZM circuit breakers, read and
understand these directions. Following the directions will ensure
that no damage is caused.
Shipping containers should be inspected for obvious signs of rough
handling and/or external damage incurred during the transportation
phase. Record any observed damage for reporting to the transpor-
tation carrier and Moeller, once the inspection is completed. All
reports and claims should be as specific as possible and include
the order number and other applicable nameplate information.
Every effort is made to ensure that IZM circuit breakers arrive at
their destination undamaged and ready for installation. Care should
be exercised, however, to protect the breakers from impact at all
times. Do not remove protective packaging until the breakers are
ready for inspection, testing, and/or installation.
When ready to inspect and install the IZM circuit breaker, carefully
remove the banding straps and lift off the cardboard box. Remove
any additional packing material and internally packed documentation.
The circuit breaker and/or cassette are mounted to a wooden
shipping pallet.
On drawout circuit breakers shipped without a cassette, two
shipping clamps hook into the breaker side plates and are held to
the pallet with four lag screws (
). Remove the lag screws
and clamps. Save the screws and clamps for future shipment of the
breaker. On empty cassettes, remove the four or five lag screws
and/or machine screws that pass through the floorpan of the
cassette holding it to the wooden pallet. On drawout breakers
shipped in a cassette, first remove the breaker from the cassette
using the levering mechanism and drawout rails. After the breaker
is removed, the machine screws passing through the floorpan can
be removed. On fixed breakers, remove the lag screws passing
through the mounting feet that hold the breaker to the pallet.
Circuit breakers are designed to be easily lifted from the wooden
pallet using an appropriate lifting yoke and overhead or portable
lifting device.
Figure 3. Shipping Clamps for Drawout Circuit Breaker
Storing circuit breaker
If it is necessary to store a circuit breaker before installation, do
so in its original shipping container. Keep the circuit breaker in a
clean dry place. Ensure there is ample air circulation and heat, if
necessary, to prevent condensation. It is very important that the
circuit breaker not be exposed to dirt or moisture.
nOTiCE
a CirCUiT BrEakEr THaT HaS BEEn STOrED FOr anY LEngTH OF TiME
SHOULD BE OPEraTED a MiniMUM OF FiVE TiMES BEFOrE iT iS PLaCED
in SErViCE.
Lifting circuit breaker
CaUTiOn
DO nOT aTTEMPT TO LiFT CirCUiT BrEakErS WiTH OrDinarY CranE
HOOkS, rOPES, CHainS, Or OTHEr SUCH DEViCES. FaiLUrE TO FOLLOW
THiS CaUTiOn COULD rESULT in DaMagE TO ViTaL ParTS, SUCH aS arC
CHUTES, BarriErS, anD Wiring Or THE EnTirE CirCUiT BrEakEr.
To closely examine, install, or just become more familiar with the
circuit breaker, carefully lift and place the circuit breaker on a solid
work surface capable of handling the circuit breaker’s weight
(
) or on the captive drawout extension rails of the breaker
compartment. This is accomplished by using the appropriate lifting
yoke and lifter. The lifting yoke consists of two steel hooks specially
shaped to hook under the integral molded lifting handles on both
sides of the circuit breaker (
). Every effort should be made
during lifting to minimize circuit breaker swing and tilt.
If the circuit breaker is to be lifted onto compartment extension rails,
follow the instructions on page 11 “Installing drawout circuit breaker.”
Circuit breaker inspection
All circuit breakers, once removed from their shipping containers,
should be visually inspected for any obvious damage.
The current rating of the rating plug installed in the trip unit should
match the current rating of the sensors mounted on the lower
primary stabs of the circuit breaker. Check to make sure that this
match exists. The rating plug rating can be viewed from the front
of the circuit breaker (
). The sensor rating can be viewed
through the viewing windows at the rear of the circuit breaker
(
). Sensors and rating plugs can be easily changed as
described in Section 6.
Shipping
Clamp
