Altivar Process 900 Variable Speed Drives Page 45 Options

45 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 10 Overview, references Variable speed drives Altivar Process ATV900: Output filters Option: dV/dt filters Overview Altivar Process drives operate with the following maximum motor cable lengths: 150 m / 492 ft for shielded cables and 300 m / 984 ft for unshielded cables. The output voltage delivered by a drive based on PWM (Pulse Width Modulation) is a series of pulses. When applied to the motor, unexpected phenomena occur, such as overvoltages across the motor windings and high frequency currents flowing through the leakage capacitors of the cable and windings. To limit overvoltages in the motor, it is recommended, for cables longer than 50 m / 164 ft , that you check the motor insulation type and add an output filter if necessary. For further information, please consult the White Paper ''An Improved Approach for Connecting VSD and Electric Motors'' available on our website www.schneider-electric.com. Output filters are used to limit dV/dt at the motor terminals to 500 V/s maximum. Output filters are designed to limit overvoltages at the motor terminals to less than: b 800 V with a shielded cable 0 to 50 m (0 to 164 ft) long, with a 400 V supply voltage b 1,000 V with a shielded cable 50 to 150 m (164 to 492 ft) long, with a 400 V supply voltage b 1,500 V with a shielded cable 150 to 300 m (492 to 984 ft) long, with a 400 V supply voltage (up to 500 m (16,400 ft) with an unshielded cable) They are also used to: b Limit overvoltages at the motor terminals b Filter interference caused by opening a contactor placed between the filter and the motor The performance of dV/dt filters will be affected if the maximum cable lengths are exceeded. For an application with several motors connected in parallel, the cable length must include all cabling. If a cable longer than that recommended is used, the dV/dt filters may overheat. The switching frequency must be under 8 kHz. dV/dt output filters For drives Maximum length of motor cable Degree of protection In (3) Reference Weight Maximum switching frequency (1) Shielded cable (2) kHz m/ ft IP A kg/ lb Three-phase supply voltage: 200...240 V ATV930U07M3 4 300/ 984 20 6 VW3A5301 11.0/ 24.3 ATV930U15M3...U30M3 4 300/ 984 20 15 VW3A5302 12.0/ 26.5 ATV930U40M3 4 300/ 984 20 25 VW3A5303 12.0/ 26.5 ATV930U55M3...D11M3 4 300/ 984 20 50 VW3A5304 18.0/ 39.7 ATV930D15M3...D22M3 4 300/ 984 20 95 VW3A5305 19.0/ 41.9 ATV930D30M3...D45M3 ATV930D30M3C...D45M3C 2.5 300/ 984 00 180 VW3A5306 22.0/ 48.5 ATV930D55M3C...D75M3C 2.5 300/ 984 00 305 VW3A5307 40.0/ 88.2 (1) The filters are designed to operate in a switching frequency range of between 2 and 8 kHz. (2) Values given depend on the nominal switching frequency of the drive. This frequency depends on the drive rating. These cable lengths are given as examples only as they can vary depending on the application. They correspond to motors conforming to IEC 6034-25 and NEMA MG1/31.2006. (3) Nominal filter current. Altivar Process drive with dV/dt filter M1 3 ATV930 ppp M3 ATV930 ppp M3C ATV930 ppp N4 ATV930 ppp N4C dV/dt filter Overview: page 8 Variable speed drives: page 18 Configuration and runtime tools: page 22 Combinations: page 26 Dimensions: page 66

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