Siemens Limited EMEA-T10022-00-7600 Page 1
WARNING
Dangerous voltages may occur in devices and modules during operation
depending on the design and application. Incorrect use of the devices can
therefore result in severe personal injury or substantial damage to
property.
Only suitably qualified staff should work on this device.
Correct and safe operation of this device is dependent on proper handling,
installation, operation and maintenance.
Should you require further information, or should particular problems
occur which are not handled in sufficient depth in the instructions of the
respective product, help can be requested through your local Siemens
Office or representative.
Mounting and Commissioning
Mounting
The physical dimensions of the relay and the required cut-out
dimensions are shown.
1. Create a slot of dimensions as shown in Figure 1-2 to house the
relay in the protection panel.
2. Flush the rear-side of relay into the protection panel cut-out.
3. Fasten the relay using the four M4x20 Pan Phillips SS screws with
nut provided in the 7SR45 self powered overcurrent and earth
fault relay packing box to the protection panel/cubicle.
4. Carry-out all other installation steps/wiring internally from the
protection panel.
5. In the rear terminal of the relay, execute the wiring process as
mentioned in scheme requirements. For more details about
terminal connector diagram, refer to, Figure 1-3.
Refer to Table 1.1 for the recommended terminal lugs to be used.
If needed, use washers from the kit to connect the current inputs
to X5 terminal.
6. The earthing cable should be wired as indicated in the Figure 1-3
using a non-stranded cable of 2.5/4 mm2 and this should be
terminated in the shortest possible path to the earth terminal/bus
bar in panel or cubicle.
7. Maintain a minimum clearance from the relay as given in Figure 1-1
to ensure safety and accidental touch of terminals. In case of
work area is restricted in a cubicle, then suitable protective
terminals to be provided in the cubicle.
Commissioning
Proceed the commissioning tests if the following criteria's are satisfied:
1. Equipment has not been damaged in transit (physical damage).
2. Equipment has been correctly connected and installed.
3. Remove the gland insulator from the battery compartment.
4. Characteristics of the protection and settings which are based on
calculations.
5. Confirm that settings have been correctly applied.
6. To obtain a set of test results for future reference is recommended.
Figure 1-1 Clearance for Terminal Wiring
Figure 1-2 Panel Cut-Out
Terminal / Wiring Diagram
The 7SR45 self powered overcurrent and earth fault relay should be
wired according to the scheme requirements and with reference to the
appropriate wiring diagram.
7SR45 Argus Quick Reference
