Delta Electronics MVF2000 Series, Product Manual

Page: 49 / 136

45
alarm

System starts to detect output phase imbalance above active frequency of output phase
imbalance protection(P1010). During 10 minutes of continuous running time, if the
cumulative time that output unbalanced degree above threshold of output voltage
imbalance alarm(P1011) is more than fault duration time of output phase imbalance
alarm(P1262), output phase imbalance alarm is generated.
Table 4-33 Output phase imbalance fault
ID Parameter Min Max Unit Default Description
P1113
Fault action
configuration: Output
Phase Imbalance
fault
0 8 2
P1263
Fault duration time:
Output Phase
Imbalance Fault
0 65535 ms 1000
P1010
Active frequency of
output phase
imbalance protection
5 100 % 5
P1012
Threshold of output
phase imbalance
fault
0 1000
‰
30
Negative Ratio of
output voltage

System starts to detect output phase imbalance above active frequency of output phase
imbalance protection(P1010). Once the unbalanced degree of output voltage is above
threshold of output voltage imbalance fault(P1012), a counter starts to count the
imbalance time. When the unbalanced degree of output voltage is below P1012 before
the counter rises to the fault duration time of output phase imbalance fault(P1263), the
timer counts reverse. If the time counter rises to the P1263, output phase imbalance
fault is generated.
Table 4-34 Output under load
ID Parameter Min Max Unit Default Description
P1114
Fault action
configuration: Output
Under Load
0 8 0
P1264
Fault duration time:
Output Under Load
0 65535 s 20
P1029
Flux weakening
torque of output
underload
10 150 % 50
Percentage of motor
rated torque
P1030
Zero speed torque of
output underload
5 150 % 10
Percentage of motor
rated torque

Output underload is not detected below 5Hz, and not detected in V/F mode. Once the
motor works in underload area, as shown in Fig. 4-1, a counter starts to count the
underload time. When the underload fault disappears before the counter raises to fault
duration time of output under load(P1264), the timer counts reverse. If the time counter
rises to the P1264, output underload fault is generated.