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23
IB-65020A
Installation
a crane. Therefore, when setting down the
circuit breaker, it will be necessary to guide the
circuit breaker to ensure that all four wheels are
placed on a level surface. Use the front handles
or top front frame to guide the circuit breaker
to an upright position on a level surface.
Figure 13 Lifting the Circuit Breaker by Crane
c. S
torAGe
It is recommended that the circuit breaker be
put into service immediately in its permanent
location after completing the commissioning
tests. If this is not possible, the following
precautions must be taken to ensure the
proper storage of the circuit breaker:
1. Since dampness has an adverse effect on
the insulating parts, the breaker should be
carefully protected against condensation,
preferably by storing it in a warm, dry room
of moderate temperature, such as
40°-100°F. Circuit breakers used in outdoor
metal-clad switchgear should be stored
in the equipment only when power is
available and the anti-condensation heaters
are in operation.
2. The circuit breaker should be stored in a
clean location free from corrosive gases or
fumes. Particular care should be taken to
protect the equipment from moisture and
cement dust, as this combination has a
corrosive effect on many parts.
3. Unplated surfaces, such as rollers, latches,
etc., should be coated with grease/oil to
prevent rusting.
If the circuit breaker is stored for any length
of time, it should be inspected periodically
to see that rusting has not started and
to ensure good mechanical condition.
Should the circuit breaker be stored under
unfavorable atmospheric conditions, it should
be cleaned and dried before attempting the
commissioning tests and before placing the
circuit breaker into service.
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ervIce
Before shipment from our factory, all circuit
breaker functions are thoroughly checked. The
user must verify functions after receipt. Powell
recommends that the tests be performed in the
sequence listed below:
1) High Voltage Insulation Integrity
2) Vacuum Integrity
3) Control Voltage Insulation Integrity
4) Mechanical Operation Check
5) Electrical Operation Check
6) Racking Mechanism Check