N700 Operating Instructions and Parts Manual
8. Explanation of b-Group
79
ex)
200V class 15Hp
Rated current : 46A
Setting extent : 9.2~55.2A
electronic thermal level is b027 : 46 A
The time limit characteristic is right diagram.
Fig. 8- 7 Time limit characteristic (200V class 15Hp)
①
Reduced torque characteristic
To add the time limit characteristic matching with the reduced time rate(b027/b227) of the
frequency.
Ex) 200V class 15Hp, b027 = 46A, output frequency=20Hz
Fig. 8- 8 Reduced torque characteristic (200V class 15Hp)
②
Constant torque characteristic
Set this characteristic in case of the use of a constant torque motor.
Ex) 200V class 15Hp, b027 = 46A, output frequency = 2.5Hz
Fig. 8- 9 Constant torque characteristic (200V class 15Hp)
(2) Thermal
warning
①
A warning signal can be generated before overheat protection by the electronic thermal
protection occurs. Warning level is set with b029.
②
Assign 13(THM) to intelligent output terminal 11~14(o001-o004) or the alarm relay output.
T r ip t im e ( s )
M o t o r c u r r e n t ( A )
(Ratio for inverter rated current)
6 0
0 .5
0
5 3 .4
( 1 5 0 % )
6 9
( 1 1 6 % )
9 2
( 2 0 0 % )
