2. Installation

2.4 Required protective devices and cable sizes

Recommended upstream protection

UPS

Upstream circuit-breaker on

Upstream circuit-breaker on

Upstream circuit-breakers on

power

separate Normal AC input

separate Bypass AC input

common bypass and Normal AC

rating

 

 

input

 

 

 

 

20 kVA

C60L - 50 A

NS100N 4P-TM100A

NS100N 4P-TM100A

 

 

 

 

30 kVA

C60L - 63 A

NS100N 4P-TM100A

NS100N 4P-TM100A

 

 

 

 

40 kVA

NS100N 3P-TM80A

NS100N 4P-TM100A

NS100N 4P-TM100A

 

 

 

 

60 kVA

NS125E 3P-TM125A

NS125E 4P-TM125A

NS125E 4P-TM125A

 

 

 

 

80 kVA

NS160N 3P-TM160A

NS160N 4P-TM160A

NS160N 4P-TM160A

 

 

 

 

100 kVA

NS250N 3P-TM200A

NS250N 4P-TM250A

NS250N 4P-TM250A

 

 

 

 

120 kVA

NS250N 3P-TM250A

NS250N 4P-TM250A

NS250N 4P-TM250A

 

 

 

 

The circuit breakers recommended above respect the requirements for discrimination with the UPS fuses

Stick a label with the following text on each upstream circuit breaker: "Isolate Uninterrptible Power Supply (UPS) before working on this circuit".

Recommended downstream protection

UPS power rating

Downstream

Trip unit

Curve N for the downstream circuit breaker

 

circuit breaker

 

may be replaced by curve H or L, depending

 

 

 

on the installation.

20-30-40 kVA

C60N

C 16A

The indicated protection ensures

 

 

 

 

C60N

B 25A

discrimination for each output circuit

 

downstream of the UPS, whether supplied by

 

 

 

60 kVA

C60N

C 20A

via the normal or the Bypass AC source. If

 

 

 

these recommendations are not followed, a

 

C60N

B 32A

 

short-circuit on an output circuit can result in

 

 

 

80 kVA

C60N

C 25A

a break in power longer than 20 milliseconds

 

 

 

on all the other output circuits.

 

C60N

B 50A

 

 

 

 

 

 

100-120 kVA

C60N

C 32A

 

 

 

 

 

 

C120N

B 63A

 

 

 

 

 

 

NS100

TMG 50A

 

 

 

 

 

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.

Earth-leakage current

UPS earth-leakage current is 1 A.

34001813EN/AE - Page 14

Page 14
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APC 5000 Required protective devices and cable sizes, Recommended upstream protection, Recommended downstream protection

5000 specifications

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