Nord Drivesystems NORDAC FLEX SK 200E Series User Manual page 198

NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
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Current limit
P536
(Current limit)
0.1 ... 2.0 / 2.1 The inverter output current is limited to the set value. If this limit value is reached, the inverter
reduces the actual output frequency.
(x nominal FI
current)
With the analogue input function in P400 = 13/14, this limit value can also be varied and cause an
{ 1.5 } error message (E12.4).
0.1 ... 2.0 = Multiplier with the inverter nominal current, gives the limit value.
2.1 = OFF
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Pulse disconnection
P537
(Pulse disconnection)
10 ... 200 % / 201 This function prevents rapid shutdown of the FI according to the load. With the pulse switch-off
enabled, the output current is limited to the set value. This limitation is implemented by brief
{ 150 }
switching off of individual output stage transistors, the actual output frequency remains
unchanged.
10...200 % =
201 =
NOTE:
NOTE:
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198
means that this limit value is disabled. The FI supplies the maximum possible
current.
Limit value in relation to nominal FI current
The function is so to speak disabled, the FI supplies the maximum
possible current. However, at the current limit the pulse switch-off can still be
active.
The value set here can be undershot by a smaller value in P536.
With smaller output frequencies (<4.5 Hz) or higher pulse frequencies (>6 kHz
or 8 kHz, P504) the pulse switch-off can be undershot by the power reduction
(please see chapter 8.4 "Reduced output power").
If the pulse switch-off is disabled (P537=201) and a high pulse frequency is
selected in parameter P504, the FI automatically reduces the pulse frequency
when the power limit is reached. If the load on the FI is reduced again, the
pulse frequency increases back to the original value.
S
S
BU 0200 en-3118