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.

Installing a Molded Case Circuit Breaker (MCCB)

Install an 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 an MCCB:

• The capacity of the MCCB should be 1.5 to 2 times the rated output current of the drive. Use an MCCB 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 an MCCB is shared with other equipment, use a sequence that shuts the power OFF when errors are

output by using magnetic contactor (MC) as shown the following figure.

• Install a 400/200 V transformer when using a 400 V class power supply input.

WARNING! Electrical Shock Hazard. Disconnect the MCCB and MC before wiring terminals. Failure to comply may result in serious injury or death.

Installing a Leakage Breaker

Drive outputs generate high-frequency leakage current as a result of high-speed switching. Install a Ground Fault Circuit Interrupter (GFCI) on the input

side of the drive to switch off potentially harmful leakage current.

Factors in determining leakage current:

• Size of the AC drive

• AC drive carrier frequency

• Motor cable type and length

• EMI/RFI filter

In order to safely protect the drive system, select a breaker that senses all types of current (AC and DC) and high frequency currents

Note: Choose a GFCI designed specifically for an AC drive. The operation time should be at least 0.1 second with sensitivity amperage of at least 200 mA per drive. The output

waveform of the drive may cause the leakage current to increase. This may, in turn, cause the leakage breaker to malfunction. Take the following steps to correct the problem:

• Increase the sensitivity amperage.

• Lower the carrier frequency.

Installing a Magnetic Contactor

Disconnecting the Power Supply

The drive can be shut off in the case of a fault in external equipment such as braking resistors through use of a Magnetic Contactor (MC).

NOTICE: Install the MC on the input side of the drive when the drive should not automatically restart after power loss. To get the full performance life out of the electrolytic capacitors

and circuit relays, refrain from switching the MC more than once every 30 minutes. Frequent use can damage the drive. Use the drive to stop and start the motor.

Protecting the Braking Resistor or Braking Resistor Unit

Use an MC on the input side of the drive to protect a braking resistor or braking resistor unit from overheat or fire.

YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)

MCCB

Three-Phase

AC200 ~ 240 V

50/60 Hz

Single-Phase

AC200 ~ 240 V

50/60 Hz

Figure 8.2 Connecting an MCCB (for Three-Phase 200 V Class)

MCCB