6
3.4. Electrical Requisites
The installation must comply with national installation regulations.
The electrical distribution panels for the mains and separated bypass mains inputs must have a protection
and disconnection system. Disconnection devices used in these panels shall disconnect all line conductors
simultaneously. The following table shows the recommended size of the mains and separate bypass mains
input protection devices (thermal, magnetic and differential) and the cable cross-sections.
POWER
INPUT
CIRCUIT
BREAKER
OUTPUT
CIRCUIT
BREAKER
BATTERY
FAST
FUSE
INPUT
BYPASS
BATTERY
NEUTRAL
BYPASS
FAST
FUSE
LEAKAGE
PROTECTION*
10 kVA
20 A
20 A
25 A
4 mm
2
4 mm
2
4 mm
2
6 mm
2
100 A
300 mA
15 kVA
32 A
32 A
32 A
4 mm
2
4 mm
2
4 mm
2
6 mm
2
100 A
300 mA
20 kVA
32 A
32 A
50 A
6mm
2
6 mm
2
6 mm
2
10 mm
2
100 A
300 mA
30 kVA
63 A
63 A
63 A
10 mm
2
10 mm
2
10 mm
2
16 mm
2
125 A
300 mA
40 kVA
80 A
63 A
80 A
16 mm
2
16 mm
2
16 mm
2
25 mm
2
160 A
300 mA
60 kVA
125 A
125 A
100 A
25 mm
2
25 mm
2
25 mm
2
35 mm
2
200 A
300 mA
80 kVA
125 A
125 A
125 A
35 mm
2
35 mm
2
35 mm
2
50 mm
2
250 A
300 mA
100 kVA
175 A
175 A
160 A
50 mm
2
50 mm
2
50 mm
2
70 mm
2
250 A
300 mA
120 kVA
200 A
200 A
200 A
70 mm
2
70 mm
2
70 mm
2
95 mm
2
250 A
300 mA
160 kVA
250 A
250 A
250 A
95 mm
2
95 mm
2
95 mm
2
120 mm
2
400 A
300 mA
200 kVA
320 A
320 A
315 A
120 mm
2
120 mm
2
120 mm
2
150 mm
2
500 A
300 mA
250 kVA
400 A
400 A
400 A
150 mm
2
150 mm
2
150 mm
2
185 mm
2
500 A
300 mA
300 kVA
500 A
500 A
500 A
185 mm
2
185 mm
2
185 mm
2
2X95 mm
2
630 A
300 mA
400 kVA
630 A
630 A
630 A
2X95
mm
2
2X95
mm
2
2X95 mm
2
2X120 mm
2
800 A
300 mA
* Minimum 300mA delayed (Type-B). When used, the residual current earth leakage protection system must
be common for the two AC inputs (input & split bypass) and installed upstream.
Load leakage currents are added to those generated by the UPS. If loads with high leakage currents are
present, adjust this value accordingly. It is recommended to adjust the protective device after measuring the
total leakage current with the UPS installed and operational with the intended load.
During transitory phases (power failure, return and voltage fluctuations) short leakage current peaks may
occur. Make sure that the protection is not activated in such cases.
Input magnetic protection devices shall have D characteristic.
Protective Earth/Bonding
: Recommended cross section for ground wire at least half of the section of cable
phases AND shall comply with the standards of the country.
