Rockwell Automation 1336S Plus FRN 1.xx-5.xx - Manual (Page 13)

2–3 Installation/Wiring
1336 PLUS drives are suitable for use on a circuit capable of
delivering up to a maximum of 200,000 rms symmetrical amperes,
600 volts maximum when used with the AC input line fuses
specified in Table 2.A.
!
ATTENTION: To guard against personal injury and/or
equipment damage caused by improper fusing, use only
the recommended line fuses specified in Table 2.A.
Unbalanced Distribution Systems
This drive is designed to operate on three-phase supply systems
whose line voltages are symmetrical. Surge suppression devices are
included to protect the drive from lightning induced overvoltages
between line and ground. Where the potential exists for abnormally
high phase-to-ground voltages (in excess of 125% of nominal), or
where the supply ground is tied to another system or equipment that
could cause the ground potential to vary with operation, suitable
isolation is required for the drive. Where this potential exists, an
isolation transformer is strongly recommended.
Ungrounded Distribution Systems
All 1336 PLUS drives are equipped with an MOV (Metal Oxide
Varistor) that provides voltage surge protection and phase-to-phase
plus phase-to-ground protection which is designed to meet IEEE
587. The MOV circuit is designed for surge suppression only
(transient line protection), not continuous operation.
With ungrounded distribution systems, the phase-to-ground MOV
connection could become a continuous current path to ground.
Energy ratings are listed below. Exceeding the published line-to-line
and line-to-ground voltage ratings may cause physical damage to the
MOV. Refer to page A–1.
1 2 3 4
Joules = (B)
Ground
Three-Phase
AC Input
T
S
R
Joules = (A)
Joules = (A)
Joules = (A)
Frame Reference
Device Rating (V)
Line-Line (A)
Line-Ground (B)
B-C
240 480 600
160 160 160
220 220 220
A
240 480 600
160 140 NA
220 220 NA
D-G
240 480 600
140 140 150
220 220 220
Line-to-Line MOV Rating
Energy Rating = 2 x Line-Line Rating (A)
Line-to-Ground MOV Rating
Energy Rating = Line-Line (A) + Line-Ground (B)
AC Supply Source