Installation
10
3.5
Installation of Differential Protection Devices
To avoid spurious operation, differential protection devices must be:
• rated at differential current NOT LESS THAN 100mA
• a SELECTIVE type (delayed intervention)
• Type A
Figure 4
Standard configuration - differential breaker
3.6
External Electrical Connections
Remove the protective panel on the rear of the UPS to access the external electrical connections (see
figure below). Once the cables have been connected they must be passed through the cable clamps
that will hold them in position. Connect the earth cable first.
Figure 5
Side view
!
WARNING
Ensure that the UPS is isolated before removing panels.
NOTE
Once installation has been completed, fix the UPS in position by screwing the stabilizing plates
underneath the unit firmly to the floor.
D1
Protective panel over
external connections
