Reliance electric GV3000SE, Instruction Manual

Page: 27 / 198

2 - DESCRIPTION
49'1327 e GV3000/SE 2-17
Built-in Braking Unit (Option)
Table 2-5: Braking Power and Permitted Braking Resistor 3)
Unit
Braking Power 1) Maximum Maximum Turn-on Turn-off Minimum
Type
continuous Short Time
at Cycle 1:4 Braking
Current P/U Input
Voltage Voltage
1)
Voltage
1)
Permitted external
Braking Resistor
003-008 4.5 kW 4.5 kW 6 A 460 V 750 V 720 V
125.0
Ω
011-015 7.5 kW 7.5 kW 10 A 460 V 750 V 720 V
75.0
Ω
024 11 kW 11 kW 15 A 460 V 750 V 720 V
50.0
Ω
030 15 kW 15 kW 20 A 460 V 750 V 720 V
37.5
Ω
039/044 22 kW 22 kW 30 A 460 V 750 V 720 V
25.0
Ω
038/043,
058-085 9 kW 37 kW 50 A 460 V 2) 750 V 720 V
15.0
Ω
089-240 18 kW 75 kW 100 A 460 V 2) 750 V 720 V
7.5
Ω
1) On types 003-030 and 039/044 the Turn-on and the Turn-off voltage and thus the braking power is
proportional to the AC-line voltage (specified in parameter H.021 or U.018).
2)
On types 038/043, 058-240 the line input voltage is preselected by a jumper plug on the BUC-card.
The initial setting is 460 V and should not be changed.
3)
On types 305 and 360 the Option built-in Braking Unit is not available. The use of the separately
mounted Braking Unit DBU-200 or DBU-400 is recommended.
Permissible Loading of the Braking Unit
To prevent thermal overloading of the Braking Unit, assure that the unit works within the following limits:
a) GV3000/SE types 003-030 and 039/044:
The maximum braking power is defined by the maximum braking current and the maximum
DC-voltage (750V). The loading is continuously permitted.
b) GV3000/SE types 038/043 and 058-240:
In a time period of 10 minutes the permissible loading is limited to a current-time area of
Imax * 2.5 minutes with any shaping of the area.
Examples to b):
1) Drive with high inertia connected braking to
zero speed at linear decreasing braking
torque (e.g. centrifuge)
2) Drive with active load at constant braking
torque (e.g. hoist crane)
5 min.
10 min.
Pmax = Imax * Udc
5 min.
10 min.
Pmax = Imax * Udc
Pmax
2