5
Location Component Recommended Model or
Specifications Component
Source Quantity
Smart
array
controller
LAN switch
(optional) UT-H605 or ES1000
Can be
purchased
from Huawei
1
Fitting
bag for
optical
ring
switching
Low-
speed
optical
module FTLF1323P1BTR-HW 2
Optical
jumper PLCLC5S-ST3P302-HW, LC-LC-S2-
L2, 3ECA1031LCLC002-01-F, or LP-
LP-2S-P-SM-002 8
Box-type
transformer
Miniature circuit
breaker (MCB) Recommended rated current: 32 A;
number of poles: 2
Prepared by
the
customer
1
Three-
phase
power
switch
Knife
fuse
switch
(solution
1)
⚫When the rated AC voltage on
the low-voltage side of the box-
type transformer is less than or
equal to 500 V, the rated voltage
of the knife fuse switch should be
greater than or equal to 600 V.
⚫When the rated AC voltage on
the low-voltage side of the box-
type transformer is greater than
500 V and less than or equal to
800 V, the rated voltage of the
knife fuse switch should be
greater than or equal to 800 V.
⚫Recommended rated current of
the fuse: 32 A; rated current of
the knife fuse switch box ≥ 32 A;
number of poles: 3 (3 fuses for
each knife fuse switch box)
⚫Scenario
with a
double-
column
transformer:
1
⚫Scenario
with a dual-
split
transformer:
2
MCCB
(solution
2)
⚫When the rated AC voltage on
the low-voltage side of the box-
type transformer is less than or
equal to 500 V, the rated voltage
of the molded case circuit breaker
(MCCB) should be greater than or
equal to 600 V.
⚫When the rated AC voltage on
the low-voltage side of the box-
type transformer is greater than
500 V and less than or equal to
800 V, the rated voltage of the
MCCB should be greater than or
equal to 800 V.
⚫Let-through energy ≤ 1.26 x 106
A2s
⚫Recommended rated current: 32
A; number of poles: 3
The following table describes the components to be configured in the fiber ring networking scenario.
⚫Select either an MCCB or a knife fuse switch as the three-phase power switch. If you select an
MCCB, ensure that the let-through energy of the MCCB meets requirements. The breaking
capacity depends on the limited short-circuit current on the low voltage side of the box-type
transformer.
⚫Models of the components inside the box-type transformer are specified by the box-type
transformer vendor.
