Built-In Braking Unit (Option); Braking Power And Permitted Braking Resistor 3); Permissible Loading Of The Braking Unit - Reliance electric GV3000/SE Instruction Manual

Built-in Braking Unit (Option)

Table 2-5: Braking Power and Permitted Braking Resistor 3)
Unit
Braking Power 1)
Type
continuous
003-008 4.5 kW
011-015 7.5 kW
024 11 kW
030 15 kW
039/044 22 kW
038/043, 9 kW
058-085
089-240 18 kW
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).
On types 038/043, 058-240 the line input voltage is preselected by a jumper plug on the BUC-card.
2)
The initial setting is 460 V and should not be changed.
On types 305 and 360 the Option built-in Braking Unit is not available. The use of the separately
3)
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
I max * 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)
Pmax = Imax * Udc
5 min.
49'1327 e
Maximum
Short Time Braking
at Cycle 1:4 Current
4.5 kW
7.5 kW 10 A
11 kW 15 A
15 kW 20 A
22 kW 30 A
37 kW 50 A
75 kW 100 A
10 min.
2 - DESCRIPTION
Maximum
P/U Input
Voltage
6 A 460 V
460 V
460 V
460 V
460 V
460 V 2)
460 V 2)
2) Drive with active load at constant braking
torque (e.g. hoist crane)
GV3000/SE
Turn-on Turn-off
Voltage Voltage
1) 1)
750 V 720 V
750 V 720 V
750 V 720 V
750 V 720 V
750 V 720 V
750 V 720 V
750 V 720 V
Pmax = Imax * Udc
Pmax
2
5 min.
10 min.
Minimum
Permitted external
Braking Resistor
125.0 Ω
75.0 Ω
50.0 Ω
37.5 Ω
25.0 Ω
15.0 Ω
7.5 Ω
2-17