GE Industrial Solutions AF-300 G11 - Manual (Page 26)

2-9
Data subject to change without notice 7/07. © 2007 GE Drives
(3) Input terminals for auxiliary control power
(R0 and T0)
The drive operates even if power is not provided to these
terminals. If a protective circuit operates, and the mag-
netic contactor on the drive’s power is opened (off), the
inverter control circuit power, the alarm output (30A, B,
and C), and the keypad panel display goes off. To prevent
this, the main circuit AC power must also be supplied as
auxiliary control power to the auxiliary control power input
terminals (R0 and T0).
1. To ensure effective noise reduction when using a
radio noise filter, the output power from the filter must go
to the auxiliary control power input terminals. If these
terminals are connected to the input side of the filter, the
noise reduction effect deteriorates.
(4) DC reactor terminals (P1 and P(+))
1. Before connecting a power factor correcting DC
reactor (optional) to these terminals, remove the
factory-installed jumper.
2. If a DC reactor is not used, do not remove the jumper.
Note: For drives of 100 Hp or more, the DC reactor is
provided as a separate standard component and should
always be connected to the terminals. DC reactor is
provided as open type, enclosure to be provided by other.
CAUTION
A DC reactor does not come with drives rated less
then 100 Hp, however, use a DC reactor or AC
reactor under the following conditions otherwise the
drive may be damaged or malfunction.
1) Used when the capacity of the power supply trans-
former exceeds 500k VA and exceeds the rated
capacity of the drive tenfold.
2. Used when a thyrister converter is connected as a
common load on the same transformer.
3. Used to prevent a drive OV trip from occuring when
the power factor capacitor in the power line is
switched on and off.
4. Used when the voltage imbalance exceds 3%.
(5) Terminals for external braking resistor (P(+) and
DB) (10 Hp or less)
For the G11 of 10 Hp or less, a built-in braking resistor is
connected to terminals P(+) and DB. If this braking
resistor does not provide sufficient thermal capacity
(e.g., in highly repetitive operation or heavy inertia load
operation), an external braking resistor (option) must be
mounted to improve braking performance.
1. Remove the built-in braking resistor from terminals
P(+) and DB. Insulate the resistor-removed terminals
with adhesive insulation tape, etc.
2. Connect terminals P(+) and DB on the external
braking resistor to terminals P(+) and DB on the drive.
3. The wiring length (twisted pair cables, etc.) should
not exceed 16.5 feet (5m).
(6) Terminals for DC link circuit (P(+) and N(-))
The G11 drive of 15 Hp or more, does not contain a drive
circuit for the braking resistor. To improve braking
performance, an external braking unit (option) and an
external braking resistor (option) must be installed.
1. Connect terminals P(+) and N(-) on the braking unit to
terminals P(+) and N(-) on the drive. The wiring length
(twisted pair cables, etc.) should not exceed 16.5 feet
(5m).
2. Connect terminals P(+) and DB on the braking
resistor to terminals P(+) and DB on the braking unit.
The wiring length (twisted pair cables, etc.) should
not exceed 33 feet (10m). If terminals P(+) and N(-) on
the drive are not used, leave the terminals open. If
P(+) is connected to N(-), or the braking resistor is
connected directly, the resistor will burn up.
3. Auxiliary contacts 1 and 2 of the braking unit have
polarity.
4. Refer to DB unit instruction book for paralleled
resistors.
Note: Braking units and resistors are rated on degree of
braking, duration and system frequency of braking cycle.
Verify units meet application requirements.
Imbalance rate
between phase [%] = (Max. voltage [V] - Min. voltage [V]
3-phase average voltage [V]
x 100%
Fig. 2-3-2 Connection the auxiliary control-power input terminals
Fig. 2-3-3
Fig. 2-3-4 Connection (10 Hp or less