Version Of 7Sa522 For Panel Surface Mounting; Housing - Siemens siprotec 7SA522 User Manual

2.2

Version of 7SA522 for Panel Surface Mounting

2.2.1

Housing

7SA522 Manual
C53000-G1176-C119-2
The numerical Distance Protection SIPROTEC
closed in a 7XP20 housing. 2 housing versions are available,
The device is fitted into a surface mounting housing.
The housing consists of a rectangular tube with a rear plate which is specific to the
device version, and a front cover. This housing fitted into a surface mounting housing
and secured with 4 screws, which are located behind screw covering caps at the four
corners of the front cover. Two additional screw covering caps and associated secur-
ing screws, are located at the centre top and bottom of the front cover frame with the
1
housing size / . The surface mounting housing contains the wiring from the back
1
plate specific to the device version to the screw terminal.
Guide rail mats which aid the insertion of the modules are mounted on the inside of
the rectangular tube. Connections between the modules and from the modules to the
front cover are established with flat ribbon cables and corresponding plug connectors.
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.
Hardware and Connections
®
7SA522 for surface mounting is en-
1 1
/ und
2
/ (of 19 inch).
1
1
/ has 2 ad-
1
2-15