Version Of 7Sa522 For Panel Flush Mounting (Cubicle Mounting); Housing - Siemens siprotec 7SA522 User Manual

Hardware and Connections
2.1

Version of 7SA522 for Panel Flush Mounting (Cubicle Mounting)

2.1.1

Housing

2-2
The numerical Distance Protection SIPROTEC
mounting is enclosed in a 7XP20 housing. 2 housing sizes are available, namely
1
und / (of 19 inch).
1
Different termination techniques are available depending on the ordered version.
The housing consists of a rectangular tube with a rear plate specific to the device ver-
sion and a front cover. Guide rail mats are mounted at the top and bottom on the inside
of the tube, to guide the modules during insertion. Each guide rail mat has visible num-
bering from 1 to 42, designating the mounting positions of the modules. The connec-
tion between the modules and to the front cover is by means of flat ribbon cables and
the corresponding plug connectors. The rear plate screwed to the tube contains the
required connectors for the external connections to the device.
The front cover can be detached after removal of the covers located on the 4 corners
of the front cover and the 4 screws that are then revealed. Housing size
ditional screw covers located at the centre of the top and bottom of the front cover
frame; accordingly 6 screws must be removed in this case. The front cover has a
membrane keypad containing the control and indication elements required for the user
interface with the device. All terminations to the control and indication elements are
combined by a converter module on the front cover, and routed to the processor mod-
ule (CPU) via a plug connector.
The name plate containing the principal data of the device, such as auxiliary supply
voltage, the rated test voltage and the ordering code (MLFB) is located on the external
top of the housing and on the inside of the front cover.
The mechanical dimension drawings are located in Section 10.18.
®
7SA522 for panel and cubicle flush
C53000-G1176-C119-2
1
/
2
1
/ has 2 ad-
1
7SA522 Manual