Nord Drivesystems SK 180E Series, Руководство пользователя

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NORDAC BASE (SK 180E / SK 190E) – Users Manual for Frequency Inverters
56 BU 0180 en-4118
SK ATX-POT
wire colour
Name
Terminal
SK CU4-24V…
Terminal
SK CU4-IOE
Terminal
SK 1x0E
red +10 V reference [11] [11] [11]
black AGND / 0V [12] [12] [12] / [40]
green Analogue input [14] [14] / [16] [14] / [16]
Information
Internal braking resistor "SK BRI4-…"
If an internal braking resistor of type SK BRI4-x-xxx-xxx is used, the power limitation for this must be activated
under all circumstances

Section 2.3.1 "Internal braking resistor SK BRI4-…"). Only the resistors assigned to
the relevant inverter type may be used.
2.5.1.3 Maximum output voltage and torque reduction
As the maximum achievable output voltage depends on the pulse frequency to be set, in some cases
the torque which is specified in document B1091-1 must be reduced for values above the rated pulse
frequency of 6 kHz.
For F
pulse
> 6 kHz: T
reduction
[%] = 1 % * (F
pulse
– 6 kHz)
Therefore the maximum torque must be reduced by 1 % for each kHz pulse frequency above 6 kHz.
The torque limitation must be taken into account on reaching the break frequency. The same applies
for the degree of modulation (P218). With the factory setting of 100 %, in the field reduction range a
torque reduction of 5 % must be taken into account:
For P218 > 100 %: T
reduction
[%] = 1 % * (105 – P218)
Above a value of 105 %, no reduction needs to be taken into account. However, with values above
105 % no increase in torque above that of the Planning Guideline will be achieved. Under certain
circumstances, degrees of modulation > 100 % may lead to oscillations and motor vibration due to
increased harmonics.
Information
Power derating
At pulse frequencies above 6 kHz (400 V devices) or 8 kHz (230 V) devices, the reduction in power must be
taken into account for the design of the drive unit.
If parameter (P218) is set to < 105 %, the derating of the degree of modulation must be taken into account in the
field reduction range.
2.5.1.4 Commissioning information
For Zone 22 the cable glands must at least comply with protection class IP55. Unused openings must
be closed with blank screw caps that are suitable for ATEX Zone 22 3D (generally IP 55).
The motors are protected from overheating by the device. This takes place by means of evaluation of
the motor PTC (TF) at the device side. In order to ensure this function, the PTC must be connected to
the intended input (Terminal 38/39).