C
P-097
NA1
Air Circuit Breaker
·
Rotate to the
“Disconnected” position,
and the flash barrier is
shown as the left figure.
16.2.4.6 Required main contact (taking NA1-2000X~6300X as an example) over-travel
≥
2mm.
NA1
Air Circuit Breaker
P-098
The flash barrier opening or closing is normal, and the spacing contact has no deformation or oxidization.
·
Rotate NA1-2000X~6300X to
the Connected position.
·
Press down NA1-1000X
separator and open the
connecting rod. The flash
barrier is shown as the left
figure. Observe whether each
phase bridge contacts are
deformed, misplaced or
oxidized. If any, replace same.
“
Connected
”
“Disconnected”
Rotate the friction positions and apply oil evenly.
·
Evenly apply 7012 low-temperature
lubricating grease or similar solid
grease onto the positions indicated
in the left figure.
16.2.4.5 Arcing Chamber (taking NA1-2000X~6300X as an example)
Each arc and arcing chambers are not broken. If any, please promptly replace same and clear inside dust, corrosion layer and arc
discharge point. In case of serious corrosion or rust, please promptly conduct replacement.
Note: Inspection must be done after short-circuit current breaking.
·
Remove the fixing bolts
·
Take out the arc chamber.
·
Check chamber conditions.
·
Conduct manual closing operation, and observe the main contact over-travel.
Note: Please replace the contact if it reaches the position shown.
·
Close the product and main contact is at the shown position. Observe any dust,
particle burnt objects and oxidized corrosion layer of dynamic and static
contacts. If any, please promptly clear same.
Clear dust, corrosion layer and particle burnt objects.
Note: Inspection must be done after short-circuit current breaking.
16.2.4.7 Secondary circuit inspection
No shell damage.
Inspect the contact between the draw-out body secondary
circuitand drawer set secondary circuit
the multimeter.
using
At the “Test” or “Connection” position, the contacts are
in good contact
,
, and the connecting screws are fastened
and the conductor insulation has no damage.
16.3 Replacement of undervoltage release, shunt release and
closed electromagnet accessories.The following operations
must be e xecuted before replacing the accessories.
Cut off all power supplies and ensure the main circuit and
secondary circuit power supplies are uncharged. The
circuit b r e
akers are in the discharging opening state.
16.3.1 Replacement of fixed accessories
Remove the panel fixing bolts and dismantle the panel.
Untie the tape and remove the connecting conductor.
Remove the fixed accessory mounting screws.
Dismantle the accessories and replace same.
Note: The shunt release should be first dismantled before replacing the NA1-2000
undervoltage release.
Summary of Contents for NA1
Page 1: ...Air Circuit Breaker Leading every step reliable new height ...
Page 2: ...Air Circuit Breaker Leading every step reliable new height ...
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