Open Phase Protection Function Selection (B026) - Hyundai n 700 Instruction Manual

N700 Operating Instructions and Parts Manual
8.12

Open phase protection function selection (b026)

This is the function to warn when the input supply for the inverter opens.
Code Function name
Open phase
b026 protection
NOTE) When an open phase occurs, there is a danger that the inverter could produce one of the
following states.
① The ripple current of main capacitor increases and the life of main capacitor shortens
remarkably.
② With a load, there is a danger that the capacitors or thyristors inside the inverter may be
damaged.
③ There is a risk that the in-rush resistor to limit the current inside the inverter may be burnt
out.
8.13 Electronic thermal function (b027~b029)
Set the inverter according to motor rated current to protect the motor from overloading,
overheating and damage. A warning signal can be generated before tripping an electronic
thermal protection.
The frequency characteristic is set in b028.
(1) Electronic thermal level
Code Function name
Electronic thermal
b027
level
2nd motor Electronic
b227
thermal level
b028 Electronic thermal
2nd motor Electronic
b228
thermal
Electronic thermal
b029
Warning level
When output frequency of general motor decreases cooling function of self-cooled fan will
fall in general motor.
Reduced torque characteristic was programmed according to a Hyundai general motor
heat pattern.
Initial value
0
selection
Table 8- 17 Open phase protection function selection (b026)
Initial
value
Irate
Irate
1
1
80
Table 8- 18 Electronic thermal function (b027~b029)
Unit Setting range
Invalid: Do not trip when the input supply
0
- opens.
1 Valid: Trip when the input supply opens.
Setting
Unit
range
Please, set value less than 2 times of motor
A 0.0~999.9
rated current
Please, set value less than 2 times of motor
A 0.0~999.9
rated current
0 Reduction : Reduced torque characteristic
-
1 Constant torque : Constant torque characteristic
0 Reduction : Reduced torque characteristic
-
1 Constant torque : Constant torque characteristic
0 : Thermal warning is non-effective
% 0~100
Units: %
78
8. Explanation of b-Group
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