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EMMA-(A01, A02)
User Manual
Item
RS485
CT
DO
12V_OUT
FE
ANT
Table 5-2 Recommended external CT specifications
Turn
Ratio
≥
2000:1
NOTE
Issue 01 (2023-09-15)
Name
RS485
communicati
ons cable
(Optional)
External CT
cable
DO signal
cable
12 V output
cable
FE
communicati
ons cable
(Optional)
External
WLAN
antenna
Accura
Test
cy
Point
0.2
Differen
ce (%)
Angle
differen
ce (')
● Secondary side: 50 mA
N x 50 A ( N ≥ 2, and N is an integer)
● Primary side:
● The external CT communications cables are shorter than or equal to 30 m and not
routed separately. It is recommended that the cables be routed through pipes.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Type
Conductor Cross-
Sectional Area
Two-core
0.2 mm
outdoor shielded
mm
twisted pair
recommended)
cable
Two-core or
0.2 mm
multi-core
mm
outdoor twisted
recommended)
pair cable
Two-core or
0.2 mm
multi-core
mm
outdoor twisted
recommended)
pair cable
Two-core or
0.2 mm
multi-core
mm
outdoor twisted
recommended)
pair cable
Cat 5e network
0.12 mm
cable, internal
mm
resistance ≤ 1.5
recommended)
ohms/10 m
RJ45 connector
External antenna
-
with the RP-
SMA-J port
Percentage at Rated Current
1%
5%
±0.40
±0.20
±30
±15
5 Electrical Connections
Source
Prepared
2
to 1.5
by the
2
2
(0.5 mm
customer
Prepared
2
to 1.5
by the
2
2
(0.5 mm
customer
Prepared
2
to 1.5
by the
2
2
(0.5 mm
customer
2
Prepared
to 1.5
by the
2
2
(0.5 mm
customer
Prepared
2
to 0.2
by the
2
2
(0.2 mm
customer
Prepared
by the
customer
20%
100%
±0.20
±0.20
±10
±10
120%
±0.20
±10
26
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