Version Of 7Sa6 For Panel Surface Mounting; Housing - Siemens siprotec 7SA6 User Manual

2.2

Version of 7SA6 for Panel Surface Mounting

2.2.1

Housing

7SA6 Manual
C53000-G1176-C133-1
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 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 mounting. Each guide rail mat has visible numbering from 1 to 42, des-
ignating the mounting positions of the modules. The modules and the front cover are
connected by means of flat ribbon cables and the corresponding plug connectors.
This tube is 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 ad-
ditional screw covering caps and associated securing screws, are located at the cen-
tre top and bottom of the front cover frame with the housing size
mounting housing contains the wiring from the back plate to the screw terminal.
The front cover can be taken off 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 10.20.
Hardware and Connections
®
7SA6 for surface mounting is en-
1 1
/ und
2
1
/ . The surface
1
/ (of 19 inch).
1
1
/ has 2 ad-
1
2-21