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C
1. General
1.1 Application scope
NA1 series air circuit breaker is suitable for the circuit of AC 50Hz/60Hz with rated service voltage 400V, 690V and rated service current up to
6300A. It is mainly used to distribute electric energy and protect circuits and electric equipment against over-load, under-voltage, short-circuit
and single-phase earthing fault. With intelligentized and selective protection functions, the breaker can improve the reliability of power supply,
and avoid unnecessary power failure. The breaker is applicable for power stations, factories, mines (for 690V) and modern high-buildings, especially
for the distribution system of intelligentized building.
1.2 Standard: IEC/EN 60947-2.
2. Operation Conditions
2.1 Temperature Condition: -5
℃
~40
℃
; the average value within 24h shall not 35
℃
(special situation excluded);
2.2 Altitude:
≤
2000m;
2.3 Pollution grade: Grade 3;
2.4 Air conditions:
At mounting site, relative humidity not exceed 50% at the max temperature of +40
℃
, higher relative humidity is allowable under lower temperature,
RH could be 90% at +20
℃
, special measures should be taken to occurrence of dews;
2.5 Note: Without the intelligent controller, the breaker functions as a switch-disconnector.
3. Structure
Fixed type breaker/switch-disconnector
Fixed plate for the fixed type breaker
Drawer seat
Body
+
=
Drawout type breaker/switch-disconnector
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Air Circuit Breaker
Enclosure
Fault-breaking indicator
reset button
Making button
Breaking button
Breaking/making
indicator
Rotary handle
Energy storage &
release indicator
Name plate
Structure for in and out
Rotate out
Rotate in
Under-voltage release
page 50
Shunt release
page 50
Closing release
page 51
Auxiliary contact
page 51
Motor-driven energy
storage mechanism
page 51
Locking device
page 52
Intelligent controller
page 32
4. Main
technical
parameter
Type
NA1-1000
Rated ultimate short circuit breaking capacity
Rated service short circuit breaking capacity
Rated short-time withstand current
Icu=42kA 400V
Ics=30kA 400V
Icw=30kA 0.5s 400V
Rated current In (A)
200
400
630
800
1000
Number
of
poles
3, 4
Rated
voltage
Ue
(
V
)
400
Rated
insulation
voltage
Ui
(
V
)
690
Rated
current
of
N
-
pole
In
(
A
)
50%In, 100%In
Fixed
disconnection
time
(
ms
)
23~32
Intelligent
controller
Standard
type
(
M
)
Communication type (H)
Operation
performance
Electric
life
Mechanical
life
Connection pattern
Weight
(
kg
)
5000
Non-maintenance 10,000
Maintenance 20,000
Horizontal, Vertical
38/55
22/26.5
Drawout 3P/4P
Fixed 3P/4P
Summary of Contents for NA1-1000
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