Installing A Molded Case Circuit Breaker (Mccb) And Earth Leakage Circuit; Breaker (Elcb) - YASKAWA E1000 Technical Manual

■
Using Braking Units in Parallel
When multiple braking units are used, they must be installed with a master-slave configuration with a single braking unit
acting as the master. Figure 8.10
Wire the thermal overload contacts relays of all CDBRs and all braking resistors in series, then connect this signal to a
drive digital input. This input can be used to trigger a fault in the drive in case of overload in any of the CDBRs or
braking resistors.
Figure 8.10
Drive

◆ Installing a Molded Case Circuit Breaker (MCCB) and Earth Leakage Circuit

Breaker (ELCB)

Install a MCCB or ELCB 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 an MCCB or ELCB:
• The capacity of the MCCB or ELCB should be 1.5 to 2 times the rated output current of the drive. Use an MCCB or
ELCB to keep the drive from faulting out instead of using overheat protection (150% for one minute at the rated output
current).
• If several drives are connected to one MCCB or ELCB that is shared with other equipment, use a sequence that shuts
the power OFF when errors are output by using magnetic contactor (MC) as shown in the following figure.
Figure 8.11
WARNING! Electrical Shock Hazard. Disconnect the MCCB (or ELCB) and MC before wiring terminals. Failure to comply may result in
serious injury or death.
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
illustrates how to wire braking units in parallel.
Braking Resistor
Overheat Contact
(Thermal Relay Trip Contact)
−
+ 3
1
P
− + + 0 − 0
MASTER
SLAVE
+15
1
2
Braking Unit 1
3 4
Cooling Fin Overheat Contact
(Thermoswitch Contact)
Figure 8.10 Connecting Braking Units in Parallel
A MCCB
C
A – Power supply
B – Drive
Figure 8.11 Power Supply Interrupt Wiring (Example)
Braking Resistor
Overheat Contact
(Thermal Relay Trip Contact)
Braking Braking
2 1 2
Resistor Resistor
Unit Unit
B P B
− + + 0 − 0
MASTER
SLAVE
5
5
1
6
6
2
Braking Unit 2
3 4
Cooling Fin Overheat Contact Cooling Fin Overheat Contact
(Thermoswitch Contact)
B
MC
R/L1
S/L2
T/L3
MC
MB
SA
MC
MC
C – Control power supply
8.5 Installing Peripheral Devices
Braking Resistor
Overheat Contact
(Thermal Relay Trip Contact)
Braking
1 2
Resistor
Unit
P B
− + + 0 − 0
MASTER
SLAVE
1 5
2 6
Braking Unit 3
YEC_
3 4
TMonly
(Thermoswitch Contact)
YEC_
TMonly
8
341