ABB RET670 Commissioning Manual

14
12
10
8
6
4
2
0
0
0.5 1.0
1.5
2.0
2.5
3.0 3.5 4.0
62.5/125 µm
50/125 µm
O
P
B
–
O
P
T
I
C
A
L
P
O
W
E
R
B
U
D
G
E
T
-
d
B
FIBER OPTIC CABLE LENGTH - km
IEC11000409_1_en.vsd
IEC11000409 V1 EN
Figure 18: Optical power budget for fiber optic cable lengths
As shown in the graph, if one uses a 62.5/125 µm fiber, the value under the 62.5/125 µm
curve represents the remaining optical budget at any link length, which is available for
overcoming non-fiber cable related losses.
Losses in the connectors and splices are typically 0.3dB/connection. The user must
reserve 3dB spare for the uncertainty of the measurements.
1MRK 504 165-UUS - Section 9
Establishing connection and verifying the IEEE C37.118/1344 communication
Transformer protection RET670 2.2 ANSI 87
Commissioning manual

ABB RET670 Specifications

General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24