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3.9 Braking Resistor Installation
94
YASKAWA
SIEPC71061753A GA500 Technical Manual
3.9
Braking Resistor Installation
A braking resistor or braking resistor unit (dynamic braking option) helps stop the motor quickly and smoothly
when there is high load inertia. If you try to decelerate a motor in less time than usual for a coast to stop, the
motor will rotate faster than the synchronous speed that aligns with the set frequency. This will cause the motor to
become an induction generator. The inertia energy of the motor and regenerate to the drive and charge the drive
DC bus capacitor and increase the voltage. If the voltage is more than the overvoltage level, an
ov [Overvoltage]
will occur. To prevent these overvoltage faults, a dynamic braking option is necessary.
WARNING!
Set L3-04 = 0 [Stall Prevention during Decel = Disabled] when you operate the drive with:
• a regenerative converter
• regenerative unit
• braking resistor
• braking resistor unit.
If you set the parameter incorrectly, the drive can decelerate for too long and cause serious injury or death.
NOTICE:
Before you connect a dynamic braking option to the drive, make sure that qualified personnel read and obey the
Braking Unit and Braking Resistor Unit Installation Manual (TOBPC72060001). If you do not read and obey the manual or if
personnel are not qualified it can cause damage to the drive and braking circuit.
Note:
•
Select the correct braking circuit size to dissipate the power that is necessary to decelerate the load in the correct time. Before you run
the drive, make sure that the braking circuit can dissipate the energy for the set deceleration time.
•
To install a dynamic braking option, set
L8-01 = 0 [3% ERF DB Resistor Protection = Disabled]
.
WARNING!
Fire Hazard. Do not connect a braking resistor to ter1 or -. Use terminals B1 and B2 for the braking resistor
connections. If you connect a braking resistor to the incorrect terminals, it can cause damage to the drive and braking circuit and
serious injury or death.
NOTICE:
Connect braking resistors to the drive as shown in the connection diagram examples. If you wire the braking circuits
incorrectly, it can cause damage to the drive or equipment.
To connect a Yaskawa ERF series braking resistor to the drive, set
L8-01 = 1 [Enabled]
.
To use a non-ERF-type braking resistor, connect a thermal overload relay between the drive and the braking
resistor and set a circuit to turn OFF the drive power at the trip contacts of the thermal overload relay.
◆
Install a Braking Resistor: ERF-Type
Connect a braking resistor to drive models 2001 to 2021, B001 to B018, and 4001 to 4012 as shown in
When you use a braking resistor, set
L8-01 = 1 [3% ERF DB Resistor Protection = Enabled]
and set one of the
MFDO parameters
H2-01 to H2-03 = D [MFDO Function Selection = Braking Resistor Fault]
. Use a sequence to
turn OFF the power with a MFDO.
Figure 3.50 Install an ERF-Type Braking Resistor
◆
Install a Braking Resistor Unit: LKEB-Type
Connect the braking resistor unit as shown in
. To install a braking resistor unit, set
L8-01 = 0 [3%
ERF DB Resistor Protection = Disabled]
.
This product has a built-in braking transistor.
To prevent overheating the braking resistor unit, set a sequence to de-energize the drive at the trip contacts of the
thermal overload relay.
Содержание CIPR-GA50C series
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Страница 44: ...2 9 Installation Methods 44 YASKAWA SIEPC71061753A GA500 Technical Manual...
Страница 110: ...3 17 Motor Application Precautions 110 YASKAWA SIEPC71061753A GA500 Technical Manual...
Страница 150: ...4 12 Test Run Checklist 150 YASKAWA SIEPC71061753A GA500 Technical Manual...
Страница 156: ...5 2 European Standards 156 YASKAWA SIEPC71061753A GA500 Technical Manual...
Страница 157: ...Standards Compliance 5 5 2 European Standards YASKAWA SIEPC71061753A GA500 Technical Manual 157...
Страница 158: ...5 2 European Standards 158 YASKAWA SIEPC71061753A GA500 Technical Manual...
Страница 159: ...Standards Compliance 5 5 2 European Standards YASKAWA SIEPC71061753A GA500 Technical Manual 159...
Страница 288: ...7 10 Troubleshooting Without Fault Display 288 YASKAWA SIEPC71061753A GA500 Technical Manual...
Страница 306: ...8 6 Storage Guidelines 306 YASKAWA SIEPC71061753A GA500 Technical Manual...
Страница 454: ...11 22 Parameters Changed by PM Motor Code Selection 454 YASKAWA SIEPC71061753A GA500 Technical Manual...