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Masterpact™ NT and NW Universal Power Circuit Breakers
Trip Curves
178
05/2014
Masterpact™ NW/NT Low Arc Flash Circuit Breakers
Figure 174: Masterpact NW Low Arc Flash Circuit Breaker: L1F and LF
Figure 175: Masterpact NT Low Arc Flash Circuit Breaker: L1F and LF
MASTERPACT
®
NW Low Arc Flash Circuit Breaker
CHARACTERISTIC TRIP CURVE NO. 613-15
(L1F AND LF) 800–2000 A, 60 Hz
700
150
200
300
400
600
800
900
1
2
3
5
7
8
9
10
15
20
30
40
50
60
70
80
90
100
1000
500
.005
.006
.007
.008
.009
.01
.015
.02
.03
.04
.05
.06
.07
.08
.09
.1
.15
.2
.3
.4
.5
.6
.7
.8
.9
1
TIME IN SECONDS
FAULT CURRENT (KA)
2 I
n
- NW08
AUTOMATIC RANGE:
NO USER CONFIGURABLE SETTINGS
USER DEFINED RANGE:
FAULT LEVEL MUST
TRIP BREAKER IN
INSTANTANEOUS MODE
(1.2X PICKUP)
Masterpact
®
NT Low Arc Flash Circuit Breaker
CHARACTERISTIC TRIP CURVE NO. 613-16
(LF) 800–1200 A, 60 Hz
700
150
200
300
400
600
800
900
1
2
3
4
5
6
7
8
9
10
15
20
30
40
50
60
70
80
90
100
1000
500
.005
.006
.007
.008
.009
.01
.015
.02
.03
.04
.05
.06
.07
.08
.09
.1
.15
.2
.3
.4
.5
.6
.7
.8
.9
1
TIME IN SECONDS
FAULT CURRENT (KA)
AUTOMATIC RANGE:
NO USER CONFIGURABLE SETTINGS
USER DEFINED RANGE:
FAULT LEVEL MUST
TRIP BREAKER IN
INSTANTANEOUS MODE
(1.2X PICKUP)
2 I
n
- NT08
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