Load-side power component

Tùy chọn bộ lọc ngõ ra Biến tần sẽ lắp đặt sau biến tần, dùng để gia tăng khoảng cách giữa mottor và biến tần (Chi tiết khoảng cách xem thêm trong catalog), giúp điện áp ngõ ra được trơn tru hơn.

Có 4 lựa chọn sau cho lọc ngõ ra G130, mã hàng căn cứ vào công suất Biến tần.

1.Motor reactors

Motor reactors reduce the voltage load on the motor windings by reducing the voltage gradients at the motor terminals that occur during converter operation. At the same time, the capacitive charge/discharge currents that place an additional load on the

converter output when long motor cables are used, are reduced. The maximum permissible output frequency when a motor reactor is used is 150 Hz.

The motor reactor must be installed as close as possible to the Power Module.

2.dv/dt filter.plus VPL

dv/dt filter plus VPL (Voltage Peak Limiter) limit the voltage rateof-rise dv/dt to values < 500 V/μs and the typical voltage peaks to the following values in accordance with the limit value curve according to IEC/TS 60034-17: 2006:

• < 1000 V at Uline < 575 V

• < 1250 V at 660 V < Uline < 690 V

Standard motors with standard insulation and without insulated bearings with a supply voltage of up to 690 V can be used for converter operation if a dv/dt filter plus VPL is used.

dv/dt filters plus VPL are designed for the following maximum motor cable lengths:

• Shielded cables: 300 m (e.g. Protodur NYCWY)

• Unshielded cables: 450 m (e.g. Protodur NYY)

For shorter cable lengths (100 m shielded, 150 m unshielded), refer to dv/dt filter compact plus VPL.

Notice: The max. permissible cable length between the dv/dt filter and Power Module is 5 m.

Design: The dv/dt filter plus VPL consists of two components, which are also supplied as separate mechanical units:

• dv/dt reactor

• Voltage limiting network, which cuts-off the voltage peaks and feeds the energy back to the DC link.

3.dv/dt compact plus VPL.

dv/dt filters compact plus VPL (Voltage Peak Limiter) limit the voltage rate-of-rise dv/dt to values of < 1600 V/μs and the typical voltage peaks to the following values in accordance with the limit value curve A according to IEC 60034-25: 2007:

• < 1150 V at U line < 575 V

• < 1400 V at 660 V < U line < 690 V

Standard motors with standard insulation and without insulated bearings with a supply voltage of up to 690 V can be used for converter operation if a dv/dt filter compact plus VPL is used.

dv/dt filters compact plus VPL are designed for the following maximum motor cable lengths:

• Shielded cables: 100 m (e.g. Protodur NYCWY)

• Unshielded cables: 150 m (e.g. Protodur NYY)

For longer cable lengths (> 100 m shielded, > 150 m unshielded) refer to dv/dt filter plus VPL.

Notice:

• The max. permissible cable length between the dv/dt filter and

Power Module is 5 m.

• Operation with output frequencies < 10 Hz is permissible for

max. 5 min.

Design : The dv/dt filter compact plus VPL consists of two components,

which are supplied together as a compact mechanical unit:

• dv/dt reactor

• Voltage limiting network, which cuts-off the voltage peaks and feeds the energy back to the DC link.

4. Sin-wave filter.

Sine-wave filters are available in the voltage range 380 V to 480 V up to a type rating of 250 kW, and in the voltage range 500 V to 600 V up to a type rating of 132 kW.

The sine-wave filter at the converter output supplies almost perfect sinusoidal voltages on the motor so that standard motors can be used without special cables or power derating. Standard cables can be used.

Note the following when a sine-wave filter is used:

• The output frequency is limited to max. 150 Hz (at 380 to 480 V) and 115 Hz (at 500 to 600 V).

• The maximum output voltage is limited to approx. 85% of the input voltage.

• Maximum permissible motor cable lengths:

- Unshielded cable: 450 m

- Shielded cable: 300 m

• During commissioning, the pulse frequency is increased to double the factory setting. This induces current derating, which must be applied to the built-in units' rated currents listed in the technical specifications.

Note: The reduced voltage at the motor terminals compared to the rated motor voltage means that the motor reaches the field weakening range earlier.

The sine-wave filter may be operated only when the motor is connected; sine-wave filters are not no-load-proof!