Installing Peripheral Devices; Installing Peripheral Devices; Dynamic Braking Options; Installing A Molded Case Circuit Breaker (Mccb) - YASKAWA L1000V Technical Manual

8.4 Installing Peripheral Devices

8.4

Installing Peripheral Devices

This section describes the proper steps and precautions to take when installing or connecting various peripheral devices
to the drive.
NOTICE: Use a class 2 power supply (UL standard) when connecting to the control terminals. Improper application of peripheral
devices could result in drive performance degradation due to improper power supply. Refer to NEC Article 725 Class 1, Class 2, and
Class 3 Remote-Control, Signaling, and Power Limited Circuits for requirements concerning class 2 power supplies.
u Dynamic Braking Options
A braking resistor must be installed in order to dissipate the energy fed back to the drive during regenerative operation.
NOTICE: Do not allow unqualified personnel to use the product. Failure to comply could result in damage to the drive or braking
circuit. Carefully review the braking resistor instruction manual when connecting a braking resistor option to the drive.
Note: The braking circuit must be sized properly in order to dissipate the regenerative energy from the elevator system. The drive is
likely to trip with DC bus overvoltage if the resistor value is too large. Connecting a too small braking resistor can damage the
drive or braking transistor. Consult with you sales representative for proper braking option selection.
WARNING! Fire Hazard. The braking resistor connection terminals are B1 and B2. Do not connect a braking resistor directly to any
other terminals. Improper wiring connections could result in death or serious injury by fire. Failure to comply may result in damage to
the braking circuit or drive.
NOTICE: Connect braking circuits to the drive as shown in the I/O wiring examples. Improperly wiring braking circuits could result in
damage to the drive or equipment.
n
Installing Braking Resistors
WARNING! Fire hazard. Always use braking resistors that are equipped with a thermal overload relay contact, and utilize this contact
to switch off the drive in case of braking resistor overheat. When connecting the braking resistors to the drive internal braking
transistor, make sure the braking transistor will not be overloaded with the required duty cycle and the selected resistance value.
Failure to comply could result in death or serious injury by fire from overheating resistors.
Always use braking resistors equipped with a thermal overload relay contact, and utilize this contact to switch off the
drive in case of braking resistor overheat. When connecting the braking resistors to the drive internal braking transistor,
make sure the braking transistor will not be overloaded with the required duty cycle and the selected resistance value.
u Installing a Molded Case Circuit Breaker (MCCB)
Install a MCCB for line protection between the power supply and the main circuit power supply input terminals R/L1,
S/L2, and T/L3. This protects the main circuit and devices wired to the main circuit while also providing overload
protection.
Consider the following when selecting and installing a MCCB:
• The capacity of the MCCB should be 1.5 to 2 times the rated output current of the drive. Use a MCCB with an
operation characteristics so that the MCCB does not trip faster than the drive overload protection works (shuts off the
drive after 30 sec. operation at 165% of the drive rated current).
• If several drives are connected to one MCCB, use a sequence that shuts the power OFF when an error occurs in one
drive by using magnetic contactor (MC) as shown in the following figure.
Figure 8.2
208
MCCB
Power
Supply
Figure 8.2 Power Supply Interrupt Wiring (Example)
YASKAWA EUROPE SIEP
Drive
MC
R/L1
S/L2
T/L3
Commo
MC
MB
n_
SA
MC
TMonly
MC
YASKAWA AC Drive L1000V Technical Manual