YASKAWA
TOEPC71061737D GA800 DRIVE INSTALLATION & PRIMARY OPERATION
97
◆
UL Compliance
Install one of the types of short circuit protection devices to comply with UL 508C. Yaskawa recommends connecting
semiconductor protection fuses. Refer to
Three-Phase 200 V Class on page 97
,
Three-Phase 400 V Class on page 98
and
6-Phase/12-Pulse 400 V Class on page 100
for recommended fuses and alternative short circuit protection
devices.
•
Semiconductor Protection Fuse
–
When you use semiconductor fuses as UL listed drive protection, the drives and fuses must be in the same
enclosure.
–
Where multiple semiconductor fuse ratings are listed for a single drive, Yaskawa recommends a fuse with a large
rated current for applications with repeated loads of approximately 150%. You can use smaller semiconductor
fuses of the same manufacturer and series than what is listed. This can decrease the life of the fuses, however.
•
Non-Semiconductor Fuse
–
Maximum CC, J, T, RK1 or RK5 fuse rating is 175% of the Normal Duty drive full load output amp (FLA) rating.
–
When you use class CC, J, or T fuses as UL listed drive protection, models 4371 and larger have the same
minimum enclosure volume requirements as MCCBs.
–
Install Class RK1 or RK5 fuses into a ventilated enclosure with a minimum enclosure volume shown in
, and
.
•
Molded-Case Circuit Breaker (MCCB)
–
Maximum MCCB rating is 200% of the Normal Duty drive full load output amp (FLA) rating.
–
When you use MCCBs, install the drive into a ventilated enclosure with a minimum enclosure volume shown in
, and
.
Note:
Yaskawa recommends current limiting MCCBs.
•
Short Circuit Current Ratings (SCCR)
The maximum SCCR provided by drive and fuse, or drive and MCCB combinations in this document, is 100,000
RMS symmetrical amps.
–
240 V Class drives: Use the protection 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.
–
480 V Class drives: Use the protection 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.
■
Three-Phase 200 V Class
Table 12.5 Required Short Circuit Protection
Drive Model
Drive Mounted without
Supplemental Enclosure
(Using UL Type 1 Kit)
Drive Mounted in Supplemental Enclosure
Any Size Protected Enclosure
(Ventilated/Non-Ventilated)
Restricted Size Protected Enclosure
(Ventilated Only)
Semiconductor
Fuse
Manufacturer:
EATON/
Bussmann
(Permitted Only
in UL Type 1
Kit)
Class CC, J, or
T Fuse
Maximum
Amps
(A)
(Permitted in
Same or
Separate
Enclosure)
Semiconductor
Fuse
Manufacturer:
EATON/
Bussmann
(Drive and
Fuses in Same
Enclosure
Only)
Class CC, J, or
T Fuse
Maximum
Amps
(A)
(Permitted in
Same or
Separate
Enclosure)
These Devices Permitted in Same or Separate Enclosure
Class CC, J, or
T Fuse
Maximum
Amps
(A)
MCCB
Maximum
Amps
(A)
Class RK1 or
RK5 Fuse
Maximum
Amps
(A)
Minimum
Enclosure
Volume
(in
3
)
2004
N/A
7
FWH-45B
7
15
7
4195
2006
N/A
10
FWH-45B
10
15
10
4195
2008
N/A
12
FWH-45B
12
15
12
4195
2010
N/A
15
FWH-45B
15
15
15
4195
2012
N/A
20
FWH-50B, FWH-
80B
20
20
20
4195