Power size [kW (hp)] Cable [m (ft)] Mains voltage [V]
Rise time [µs]
Peak voltage [V]
dU/dt [V/µs]
110–160 (150–250) 30 (98) 500 – – –
150 (492) 500 0.28 1418 2105
300 (984) 500 0.21 1530 2450
200–315 (300–450) 30 (98) 500 – – –
150 (492) 500 0.23 1261 2465
300 (984) 500 0.96 1278 597
Table 10.27 NEMA dU/dt Test Results for D1h–D8h with Shielded Cables and No Output Filter, 380–480 V
Power size [kW (hp)] Cable [m (ft)] Mains voltage [V]
Rise time [µs]
Peak voltage [V]
dU/dt [V/µs]
110–160 (150–250) 30 (98) 500 – – –
150 (492) 500 0.66 1418 1725
300 (984) 500 0.96 1530 1277
200–315 (300–450) 30 (98) 500 – – –
150 (492) 500 0.56 1261 1820
300 (984) 500 0.78 1278 1295
Table 10.28 IEC dU/dt Test Results for D1h–D8h with Shielded Cables and No Output Filter, 380–480 V
Test results for 525–690 V
NEMA does not provide dU/dt results for 690 V.
Power size [kW (hp)] Cable [m (ft)] Mains voltage [V]
Rise time [µs]
Peak voltage [V]
dU/dt [V/µs]
75–160 (75–200) 30 (98) 690 – – –
150 (492) 690 1.11 2135 1535
300 (984) 690 1.28 2304 1433
200–400 (250–400) 30 (98) 690 – – –
150 (492) 690 0.42 996 1885
300 (984) 690 1.38 2163 1253
Table 10.29 IEC dU/dt Test Results for D1h–D8h with Unshielded Cables and No Output Filter, 525–690 V
Power size [kW (hp)] Cable [m (ft)] Mains voltage [V]
Rise time [µs]
Peak voltage [V]
dU/dt [V/µs]
75–160 (75–200) 30 (98) 690 – – –
150 (492) 690 1.03 2045 1590
300 (984) 690 1.41 2132 1217
200–400 (250–400) 30 (98) 690 – – –
150 (492) 690 1.00 2022 1617
300 (984) 690 1.15 2097 1459
Table 10.30 IEC dU/dt Test Results for D1h–D8h with Shielded Cables and No Output Filter, 525–690 V
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