Enclosure Class; Ingress Protection - Hitachi Relion 650 Series Technical Manual

1MRK 511 557-UEN Rev. A
Table 430: EIA-485 interface
Type
Minimum differential driver
output voltage
Maximum output current
Minimum differential
receiver input voltage
Supported bit rates
Maximum number of IEDs
supported on the same
bus
Max. cable length
Table 431: Optical serial port (X9) and PPS synchronization input (X10)
Wave length
820 nm
820 nm
1) Maximum allowed attenuation caused by fibre
17.9

Enclosure class

Table 432: Degree of protection of rack-mounted IED
Description
Front side
Rear side, connection terminals
Table 433: Degree of protection of the LHMI
Description
Front and side
17.10

Ingress protection

Table 434: Ingress protection
Description
IED front
IED rear
IED sides
IED top
IED bottom
Technical Manual
Value
1.5 V
60 mA
0.2 V
300, 600, 1200, 2400,
4800, 9600, 19200, 38400,
57600, 115200
32
925 m (3000 ft)
Fibre type Connector
MM 62,5/125 µm ST
glass fibre core
MM 50/125 µm glass ST
fibre core
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Conditions
–
-
-
-
-
Cable: AWG24 or better, stub lines shall be avoided
Permitted path attenuation
6.8 dB (approx. 1700 m length with 4 dB/km
fibre attenuation)
2.4 dB (approx. 600 m length with 4 dB/km
fibre attenuation)
Value
IP 40
IP 20
Value
IP40
Value
IP 54
IP 20
IP 40
IP 40
IP 20
Section 17
Technical data
1)
D0E7771T201305151403 v1
D0E8127T201305151403 v2
435