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Revision 8.6
SECTION 2 : SYSTEM DESIGN
22
Table 2-8 : Circuit Breaker Selection
THYROMAT
Mechanical
Size
THYROMAT
Current
Ratings
Circuit Breaker
Frame
Trip Unit
M100
25 A
NS 100_
STR 22SE 40A
30 A
NS 100_
STR 22SE 40A
60 A
NS 100_
STR 22SE 100A
M150
100 A
NS 100_
STR 22SE 100A
150 A
NS 160_
STR 22SE 160A
M350
200 A
NS 160_
STR 22SE 160A
NS 250_
STR 22SE 160A
350 A
NS 250_
STR 22SE 250A
NS 400_
STR 23SE 400A
M500
400 A
NS 400_
STR 23SE 400A
M1000
500 A
NS 400_
STR 23SE 400A
NS 630_
STR 23SE 630A
700 A
NS 630_
STR 23SE 630A
1000 A
NS800_
Micrologic 2.0
M2000
1200 A
NS1000_
Micrologic 2.0
1500 A
NS1250_
Micrologic 2.0
2000 A
NS1600_
Micrologic 2.0
M2500
2 500 A
NS2000
Micrologic 2.0
N
OTE
1.
The thermal settings are according to the slip-
ring motor details or in the event that these
details are not available, use the stator current
equivalent for the applicable mechanical power
requirements.
2.
The short circuit protection settings for the slip-
ring motor are usually 3 times the motor stator
current.
