YASKAWA
TOMPC71061753A YASKAWA AC Drive GA500 Installation and Operation Instruction
271
Factory-Recommended Branch Circuit Protection for UL Listing
Use branch circuit protection to protect against short circuits and to maintain compliance with
UL61800-5-1. Yaskawa recommends connecting semiconductor protection fuses on the input
side for branch circuit protection. Refer to
Three-Phase 400 V Class on page 282
, and
Three-Phase 200 V Class on page 281
for more information.
WARNING
Electrical Shock Hazard. After the drive blows a fuse or trips an RCM/RCD, 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 31,000 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 31,000 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.
Low Voltage Wiring for Control Circuit Terminals
You must provide low voltage wiring as specified by the National Electric Code (NEC), the
Canadian Electric Code, Part I (CEC), and local codes. Yaskawa recommends the NEC class 1
circuit conductor. Use the UL approved class 2 power supply for external power supply.
Table 10.2 Control Circuit Terminal Power Supplies
Input/Output
Terminals
Power Supply Specifications
Digital input
S1 to S7, SN, SC, SP
Uses the LVLC power supply in the
drive.
Use the UL Listed class 2 power
supply for external power supply.
Analog input
A1, A2, AC ,+V
Uses the LVLC power supply in the
drive.
Use the UL Listed class 2 power
supply for external power supply.
Analog output
AM, AC
Uses the LVLC power supply in the
drive.
Pulse train output
MP, AC
Uses the LVLC power supply in the
drive.
Use the UL Listed class 2 power
supply for external power supply.
Pulse Train Input
RP, AC
Uses the LVLC power supply in the
drive.
Use the UL Listed class 2 power
supply for external power supply.
Safe disable input
H1, H2, HC
Uses the LVLC power supply in the
drive.
Use the UL Listed class 2 power
supply for external power supply.
