Danfoss MCC 101 Fact sheet

Fact Sheet

VLT® Sine-wave Filter MCC 101

Perfect match

for applications with short motor cables, older motors, 690 V applications with general purpose motors, frequent braking, or aggressive

environments

VLT® Sine-wave Filter MCC 101 output filters are differential mode low-pass filters that suppress the switching frequency component from the drive and smooth out the phase-to-phase output voltage of the drive to become sinusoidal. This reduces the motor insulation stress and bearing currents.

By supplying the motor with a sinusoidal voltage waveform, the switching acoustic noise from the motor is also eliminated.

Thermal losses and bearing currents

The sinusoidal voltage supply to the motor reduces hysteresis thermal losses in the motor. Since the motor insulation lifetime is dependent on the motor temperature, the sine-wave filter prolongs the lifetime of the motor.

The sinusoidal motor terminal voltage from the sine-wave filter furthermore has the advantage of suppressing bearing currents in the motor. This reduces the risk of flashover in the motor bearings and thereby also contributes to extended motor lifetime and increased service intervals.

Quality and design

All filters are designed and tested for operation with the VLT® AutomationDrive FC 302, VLT® AQUA

Drive FC 202, and the VLT® HVAC Drive FC 102. They are rated for the nominal switching frequency of the FC series and therefore no derating of the drive is needed. The enclosure is designed to match the look and quality of the FC series drives.

Advantages

Compatible with all control principles

including flux and VVC+

Parallel filter installation is possible

for applications in the high power range

Range

3 x 200 – 500 V, 2.5 – 800 A 3 x 525 – 690 V, 4.5 – 660 A

Enclosures

IP00 and IP20 wall-mounted enclosures rated up to 75 A (500 V) or 45 A (690 V)

IP23 floor-mounted enclosures rated

115 A (500 V) or 76 A (690 V) or more

IP54 both wall-mounted and floor-

mounted enscloures rated up to

4.5 A, 10 A, 22 A (690 V)

Mounting

Can be mounted side by side with

the drive for ratings up to

75 A (500 V) and 45 A (690 V)

Feature Benefit

Supplies the motor with a sinusoidal voltage waveform

Eliminates over-voltages and voltage spikes caused by cable reﬂections

Reduces electromagnetic interference by eliminating pulse reﬂection caused by current ringing in the motor cable. This allows the use of unshielded motor cables in some applications.

Eliminates acoustic noise in motor Noiseless motor operation Reduces high frequency losses in motor Prolongs service interval of motor

Prevents ﬂashover in motor windings

Protects the motor insulation against premature aging

Trouble-free operation

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Voltage and current without ﬁlter

Specifications

Voltage rating

Nominal current I

@ 50 Hz

Motor frequency

Ambient temperature -25° to 45°C without derating Minimum switching frequency, f Maximum switching frequency, f

min

max

Overload capacity 160% for 60 sec at 10-minute intervals

Enclosure ingress protection rating

Approvals CE, UL 508

3 x 200 – 500 V and 3 x 525 – 690 V

2.5 – 800 A (500 V)

4.5 – 660 A (690 V) For higher current ratings, mount sine-wave ﬁlters in parallel

For 2.5 – 10 A (500 V): – 0-60 Hz without derating – 61-120 Hz with derating For 10-800 A (500 V) and full 690 V range: – 0-50 Hz without derating – 51-100 Hz with derating

1.5 kHz – 5 kHz, depending on ﬁlter type 8 kHz

IP00 and IP20 for wall-mounted enclosures rated up to 75 A (500 V) or 45 A (690 V). IP23 for ﬂoor-mounted enclosure rated 115 A (500 V) or 76 A (690 V) or more. IP54 both wall-mounted and ﬂoor-mounted enscloures rated 4.5 A, 10 A, 22 A (690 V)

Relative sound pressure measurements from the motor with and without sine-wave lter

Voltage and current with ﬁlter

No ﬁlter With sine-wave ﬁlter

Performance Criteria VLT® dU/dt lter VLT® Sine-wave lter

Motor insulation stress

Motor bearing stress

EMC performance

Max. motor cable length

Acoustic motor switching noise

Up to 100 m cable (shielded/unshielded) complies with the requirements of IEC60034-17* for general purpose motors. Above this cable length the risk of “double pulsing” increases.

Slightly reduced, mainly in high power motors

Eliminates motor cable ringing. Does not change the emission class. Does not allow longer motor cables as speciﬁed for the built-in RFI ﬁlter in the frequency converter.

100 m - 150 m With guaranteed EMC performance: 150 m screened Without guaranteed EMC performance: 150 m unscreened

Does not eliminate acoustic switching noise from the motor

Provides a sinusoidal phase-to-phase motor terminal voltage. Complies with IEC-60034-17* and NEMA-MG1 requirements for general purpose motors with cables up to 500 m (1 km for enclosure size D and above).

Reduces bearing currents caused by circulating currents. Does not reduce common-mode currents (shaft currents).

Eliminates motor cable ringing. Does not change the emission class. Does not allow longer motor cables as speciﬁed for the built-in RFI ﬁlter in the frequency converter.

With guaranteed EMC performance: 150 m shielded and 300 m unshielded (only conducted emissions). Without guaranteed EMC performance: up to 500 m (1 km for enclosure type size D and above).

Eliminates acoustic switching noise from the motor caused by

magnetostriction Relative size 15 – 50% (depending on power size) 100% Relative price 50% 100%

* Not 690 V

Danfoss Drives, Ulsnaes 1, DK-6300 Graasten, Denmark, Tel. +45 74 88 22 22, Fax +45 74 65 25 80, www.danfoss.com/drives, E-mail: info@danfoss.com