Yaskawa GPD503 - Manual (Page 9)

Refer to Sheet 1 for latest change.
DWG. NO. 02Y00025-0393
SHEET NO. 9 OF 10
R E L . 4 / 2 6 / 9 6
IMPORTANT
Select mounting locations so that the wiring
distance between the drive and the braking
unit, and between the braking unit and the
braking resistor unit, is less than 10 meters
(33 feet).
4. Both the braking unit and the braking resistor unit
require installation with ample clearance space to
achieve high cooling efficiency.
5. Remove terminal access cover(s) on braking
resistor unit(s). Make connections between drive,
braking unit(s) and braking resistor unit(s) according
to Table 2 and Figure 2 (single units) or Figure 2
(multiple units).
NOTE: External control components shown in Figure
1 and Figure 2 are not supplied with the option. These
components are necessary for safe operation of the
Dynamic Braking option.
Grounding
6. The enclosure of the braking resistor unit must be
grounded. If the braking resistor unit cannot be
mounted in the grounded enclosure, ground it by
using a lead from the mounting screw of the unit.
7. Grounding resistance of the braking unit should be
100 ohms or less.
8. Use grounding lead conforming to your National
Electrical Code.
IMPORTANT
After wiring, test the insulation resistance of
the braking circuit with a 900V megger as
follows:
(1) Disconnect leads between the braking unit and
the drive. If equipment with semiconductors is
connected across terminals 1 and 2 of the braking
unit, remove the wiring.
(2) Connect common leads (jumpers) across braking
unit terminals N, P, Po and B, and across 3 and 4, as
shown in Figure 4.
(3) Measure the insulation resistance at a, b, and c
(see Figure 4) with a megger.
Adjustments
9. The braking unit or braking resistor unit requires
drive reprogramming.
(a) For GPD 503: Program Sn-10 to
X X 1 X , which disables stall prevention during decel.
(b) For GPD 515: Program L3-04 to " 0 " to
disable stall prevention during decel.
(b) For VCD 703: Verify On-03 is set to
X 0 X X, which disables overvolatge control function.
The Yaskawa dynamic braking module utilizes a
common control board for both 230 volt and 460 volt
units. VERIFY the correct positioning of the jumpers
on the control PCB with respect to the voltage module
voltage class, drive input line voltage and whether the
module(s) will be used as either MASTER or SLAVE.
10. Move the jumper indicated by reference
designator HD1 to correspond with the 3-phase input
voltage of the drive.
11. If two or more braking modules are applied,
ensure that unit #1 is set as the MASTER while other
unit (#2, #3, etc.) is set for SLAVE. See Figure 2.
12. For 230 volt modules (i.e. drive input voltage
equal to 190, 200, 208, 220 and 230 volts), move both
jumpers indicated by reference designators HD5 and
HD6 to the 230 volt position.
For 460 volt modules (i.e. drive input voltage
equal to 380, 400, 415, 440 and 460 volts), move both
jumpers indicated by reference designators HD5 and
HD5 to the 460 volt position.
BRAKING
RESISTOR
UNIT
BRAKING
UNIT
P
B
N
3
4
P
B
P 0
GND (E)
c
b
a
Figure 4. Megger Testing Method