Siemens 7SR157 Argus, Manual, Page: 14 / 180

7SR157 Technical Manual
Chapter 1 - Page 10 of 38 © 2022 Siemens Protection Devices Limited
The rear terminal blocks comprise M4 female terminals for wire connections. Each terminal can accept two 4mm
crimps.
Figure 2-2 Rear view of Relay (E6 Case with optional IEC61850 module)
Located at the top rear of the case is a screw clamp earthing point, this must be connected to terminal 28 and
directly to the main panel earth.
See Chapter 5 (Installation Guide) for full details of panel cut-out and internal clearance requirements.
2.3 Front Cover
As standard the relay is supplied with a transparent front cover. The front cover is used to secure the relay
assembly in the case and it is recommended that the cover is always fitted when the relay is in service.
Figure 2-3 Relay with standard transparent cover
If access is required to view the menus without removing the cover, an alternative transparent cover with push
buttons may be ordered. With the cover in place the user will only have access to the
▼ and TEST/RESET ►
buttons, allowing all areas of the menu system to be viewed, but preventing setting changes and control actions.
The only ‘action’ that is permitted is to reset the Fault Data display, latched binary outputs and LEDs by using the
TEST/RESET

button.