2. Installation
2.6 Required protective devices and cable cross-sections
Recommended upstream protection
Recommended downstream protection
The indicated protection ensures
discrimination for each output circuit
downstream of the UPS, whether
supplied by the Normal or the Bypass
AC source.
If these recommendations are not
followed, protection discrimination
is not achieved and may result in a
potential power interruption to the
connected devices.
Required cable cross-sections
Terminal-block cable capacity: 10 mm², solid or stranded wire (maximum 13 mm² or AWG 6). z
Capacity for earthing conductor: 10 mm², solid or stranded wire (maximum 13 mm² or AWG 6). z
Note: see the simplified diagrams in the appendix for common or separate AC inputs, indicating the
positions of the protection devices, the characteristics of the internal UPS fuses and UPS line currents
under overload conditions.
Note: see the simplified diagrams in the appendix for common or separate AC inputs, indicating the
positions of the protection devices, the characteristics of the internal UPS fuses and UPS line currents
under overload conditions.
UPS
power
rating
Common AC inputs
Upstream circuit-breaker
Normal / Bypass AC sources
Separate AC inputs
Upstream circuit-breaker
Normal AC source
Upstream circuit-breaker
Bypass AC source
5 kVA
D curve - 40 A C curve - 32 A D curve - 40 A
7 kVA
D curve - 40 A C curve - 32 A D curve - 40 A
11 kVA
D curve - 63 A C curve - 40 A D curve - 63 A
UPS power
rating
Downstream
circuit breaker
5 kVA
Z curve - 10 A
C curve - 4 A
7 kVA
Z curve - 10 A
C curve - 4 A
11 kVA
Z curve - 10 A
C curve - 6 A
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