Toshiba S2E21 - Page 60

TOSHIBA
6F9EOlll
CUrI-ellt Full load operation
Norlnal load operation
t
start
I _ I
Overload operation
stop
/
Starting current -----
Rated current ----
: :
: :
+ Time t
Temperature rise
: :
: :
t
: :
: :
: I
Allowable tenpreture
--.-.-.-.-.-.-.
rise (OS)
Relay operating point
Raced tenpreture
rise (ON)
Ambient temperature 0
+ Time t
Figure 16 Simulated Temperature Rise Timechart
In Figure 16. the allowable temperature rise (0SM) is a value dependent on the
insulation design of the motor and is defined in Table 5 by JIS-4004 and NEMA
MGl-1.65.
Table 5 Insulation Class and Allowable
Temperature Rise
--
--
Insulation class
Allowable temperature
rise 8s YC)
E: il
%i
Class B
Class F
Class H
;;i (105)'
*( ): NEMA
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