Physical Inspections
1. Verify that the rating of the circuit breaker is compatible
with the system.
2. Perform a visual shipping damage check. Clean the
breaker of all shipping dust, dirt and foreign material.
Manual Spring Charging Check
1. Insert the manual spring charging lever into the manual
charge handle socket as shown in Figure 8. Operate the
lever up and down until the spring condition indicator
shows the closing springs are Charged, and remove the
lever from the socket.
2. Repeat the Spring Discharge Check.
3. Verify that the springs are discharged and the breaker
primary contacts are open by observing the indicator
positions.
Figure 8. Manual Charging of Closing Springs.
As-Found and Vacuum Check Tests - Perform and record
the results of both the As-Found insulation test and the
vacuum check high-potential test. Procedures for these
tests are described in the Maintenance Section of this
manual.
Automatic Spring Charging Check
Note: A temporary source of control power and test leads
may be required if the control power source has not been
connected to the circuit breaker. (Refer to the specific wir-
ing information and rating label for your circuit breaker to
determine the voltage required and where the control volt-
age signal should be applied.) When control power is con-
nected to the breaker, the closing springs should automati-
cally charge if the control power disconnect (see Figure 6)
is closed.
The automatic spring charging features of the circuit
breaker must be checked. Control power is required for
automatic spring charging to take place.
1. Use the manual Close and Trip controls (Figure 7) to first
Close and then Open the circuit breaker contacts. Verify
contact positions visually by observing the Open/Closed
indicator on the circuit breaker.
2. Open control power circuit by opening knife switch
shown in Figure 6.
3. Perform the Spring Discharge Check again. Verify that
the closing springs are discharged and the primary con-
tacts of the circuit breaker are open.
Final Mechanical Inspection and Testing
Without Control Power
Before the circuit breaker is energized, it must be thoroughly
inspected and tested. Correct any deviations before
energization.
Inspection
Check the following points:
1.
Make a final mechanical inspection of the circuit breaker.
Verify that the contacts are in the Open position, and
the closing springs are Discharged.
2.
Make sure the breaker is properly set up and reason-
ably level on its foundation and appropriately anchored
to the foundation.
3.
Check the tightness of all hardware on the cabinet, ad-
justable legs, bushings, bus bars and operator mecha-
nism.
4.
See that the operating mechanism has been properly
lubricated.
5.
Blocking, supports and other temporary ties removed
from breakers, instruments, relays, etc.
6.
Proper fuses correctly placed.
7.
Temporary wiring jumpers (used on the secondaries of
current transformers wired to external devices, as
shown on wiring diagrams) removed.
8.
Ground connections properly made.
Installation Checks and Initial Functional Tests
2090-98
11