bonitron M3460, Customer Reference Manual

Page: 47 / 68

D_M3460_D_CMAN_vall_00a 4/17/2020
47
6.2. E
FFICIENCY
/ P
OWER
C
ONSUMPTION
All M3460 modules are 93% efficient or better at full load. Power consumption in
standby mode is less than 200W.
6.3. B
RANCH
C
IRCUIT
P
ROTECTION AND
W
IRE
S
IZING
The following information is supplied for assistance in selecting the appropriate field
wiring sizes and power source fuse ratings for the M3460:
•
Wire size must be coordinated with circuit protection devices and IR drop of wire.
It is NOT necessary to size wire for continuous duty. Maximum allowed duty cycle
for the M3460 is 1%.
•
For branch circuit protection, steady state Class J time delay or equivalent fusing
should be used to support the requirement for 2-second 2x surge capability for
M3460R models or 4-minute 1.5x current capability for M3460B models. The
recommended minimum current rating for the power source fusing is listed in
Tables 6-7 & 6-8, based on the DC bus current rating of the M3460.
•
The field wiring sizes listed in Tables 6-7 & 6-8 ensure a

10V drop for wire lengths
of

100 feet and are compatible with the recommended steady state circuit branch
protection fusing listed. The wire gauge selected for field wiring to the M3460
should be equal to or greater than that listed in Tables 6-9 & 6-10.
•
Use copper wiring rated 75°C or equivalent for field wiring terminals.
•
These devices do not provide motor overload protection.
Table 6-7: M3460R Input Power Wiring Sizes and Fusing
M3460R
DC B
US
C
URRENT
R
ATING
M
INIMUM
C
IRCUIT
B
RANCH
P
ROTECTION
F
USING
(C
LASS
J T
IME
D
ELAY
)
R
ECOMMENDED
F
IELD
W
IRING
S
IZES
85 Amps 70 Amps 4 AWG
127 Amps 100 Amps 2 AWG
170 Amps 125 Amps 1/0 AWG
255 Amps 175 Amps 2/0 AWG
340 Amps 225 Amps 3/0 AWG
425 Amps 225 Amps 4/0 AWG
Table 6-8: M3460B Input Power Wiring Sizes and Fusing
M3460B
DC B
US
C
URRENT
R
ATING
M
INIMUM
C
IRCUIT
B
RANCH
P
ROTECTION
F
USING
(C
LASS
J T
IME
D
ELAY
)
R
ECOMMENDED
F
IELD
W
IRING
S
IZES
85 Amps 70 Amps 2 AWG
127 Amps 100 Amps 1/0 AWG
170 Amps 125 Amps 2/0 AWG
255 Amps 175 Amps 3/0 AWG
340 Amps 225 Amps 4/0 AWG