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

nCompatible with all control principles including flux and VVC+

nParallel 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

nIP00 and IP20 wall-mounted enclosures rated up to

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

nIP23 floor-mounted enclosures rated 115 A (500 V) or 76 A (690 V) or more

nIP54 both wall-mounted and floormounted enscloures rated up to 4.5 A, 10 A, 22 A (690 V)

Mounting

nCan be mounted side by side with the drive for ratings up to

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

Feature

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 Reduces high frequency losses in motor

Benefit

Prevents flashover in motor windings

Protects the motor insulation against premature aging

Trouble-free operation

Noiseless motor operation Prolongs service interval of motor

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Specifications

Voltage and current without filter

	Voltage rating	3 x 200 – 500 V and
		3 x 525 – 690 V
		2.5 – 800 A (500 V)
	Nominal current IN @ 50 Hz	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
	Motor frequency	– 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
	Ambient temperature	-25° to 45°C without derating
	Minimum switching frequency, f	1.5 kHz – 5 kHz, depending on filter type
	min
	Maximum switching frequency, fmax	8 kHz
	Overload capacity	160% for 60 sec at 10-minute intervals
		IP00 and IP20 for wall-mounted enclosures rated
		up to 75 A (500 V) or 45 A (690 V).
	Enclosure ingress protection rating	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)
	Approvals	CE, UL 508

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

Voltage and current with filter

No filter

With sine-wave filter

Performance Criteria

Motor insulation stress

Motor bearing stress

EMC performance

Max. motor cable length

Acoustic motor switching noise

Relative size Relative price

VLT® dU/dt filter

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

15 – 50% (depending on power size)

50%

VLT® Sine-wave filter

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

100%

100%

* Not 690 V

Danfoss Drives, Ulsnaes 1, DK-6300 Graasten, Denmark, Tel. [phone], Fax [phone], www.danfoss.com/drives, E-mail: [e-mail]

DKDD.PFO.616.A2.02

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