Branch Circuit Protection; Factory-Recommended Branch Circuit Protection For Ul Listing - YASKAWA GA80U4720ABM Manual

Table of Contents

3.15 Branch Circuit Protection

Yaskawa recommends installing one of the following types of branch circuit protection to maintain compliance with

UL 508C. Semiconductor protective type fuses are preferred. Alternate branch circuit protection devices are also

listed. Maximum Time Delay fuse is 175% of drive full load output amps (FLA). This covers any Class CC, J, or T

class fuse. Refer to

200 V Class on page 124

WARNING! Electrical Shock Hazard. After the drive blows a fuse or trips a GFCI, do not immediately energize the drive or operate

peripheral devices. Wait for the time specified on the warning label at a minimum and make sure that all indicators are OFF. Then

check the wiring and peripheral device ratings to find the cause of the problem. If you do not know the cause of the problem, contact

Yaskawa before you energize the drive or peripheral devices. If you do not fix the problem before you operate the drive or peripheral

devices, it can cause serious injury or death.

• 200 V class

Use the fuses specified in this document to prepare the drive for use on a circuit that supplies not more than 100,000

RMS and not more than 240 Vac when there is a short circuit in the power supply.

• 400 V class

Use the fuses specified in this document to prepare the drive for use on a circuit that supplies not more than 100,000

RMS and not more than 480 Vac when there is a short circuit in the power supply.

The built-in short circuit protection of the drive does not provide branch circuit protection. The user must provide

branch circuit protection as specified by the National Electric Code (NEC), the Canadian Electric Code, Part I (CEC),

and local codes.

400 V Class on page 125

Table 3.19 Factory Recommended Fuses for 200 V Class

Semiconductor Fuse

Manufacturer: EATON/Bussmann

for the recommended fuses.

YASKAWA SIEPC71061737B GA800 Drive Technical Reference

Alternate Time-Delay

Class CC, J, or T

Maximum Amp Rating

(Maximum SCCR (kA))