Characteristics Of The Braking Unit; Electrical Characteristics - Schneider Altivar 61/71 Guía De Explotación

Characteristics of the braking unit

Electrical characteristics

Type of braking unit
Nominal voltage of line supply
and drive supply (rms value)
Engage threshold
Maximum DC bus voltage
785 V c (1)
Maximum braking
power at
1075 V c (1)
Maximum continuous power
785 V c (1)
Percentage of
conduction
time at constant
power at
1075 V c (1)
Cycle time (2)
Braking power on a vertical
movement (3)
(1) Braking unit engage threshold
(2) A longer cycle is possible, but the maximum continuous power of the braking unit must not be exceeded.
(3) Values given for a cycle time of
- 240 s for VW3 A7 101, 102
- 140 s for VW3 A7 103, 104.
Protection
Type of braking unit
Thermal protection
28
VW3 A7 101 VW3 A7 102
V 380a - 15%...480a + 10%
V 785c ± 1%
V 850
kW 420 750
-
kW 200 400
5% at 420 kW 5% at 750 kW
15% at 320 kW 15% at 550 kW
50% at 250 kW 50% at 440 kW
-
≤ 240
s
420 kW
250 kW
440 kW
0 kW
110 s
10 s 120 s
VW3 A7 101 VW3 A7 102
Integrated, via thermal probe, and controlled by the drive.
VW3 A7 103
500a - 15%...690a + 10%
1075c ± 1%
1100
-
450
300
-
5% at 450 kW
15% at 400 kW
50% at 350 kW
≤ 140
750 kW
350 kW
65 s
110 s
0 kW
10 s 120 s
VW3 A7 103
VW3 A7 104
900
400
5% at 900 kW
15% at 600 kW
50% at 500 kW
900 kW
450 kW
500 kW
65 s
0 kW
15 s
15 s 60 s
VW3 A7 104
1757084 11/2009
0 kW
60 s