LEGRAND Keor Hp Serie Installation Et Démarrage page 26

current (max Isc) that is needed to determine the breaking power of automatic circuit breakers,
and to the minimum current (min Isc) that is needed to determine the maximum length of the
line protected. The protection against short-circuit must operate on the line before any thermal
and electrothermal effects of the overcurrents may damage the cable and relevant connections.
During the electrical installation take particular care to respect the phase rotation. The
terminal boards for cables connection are positioned at the front of the UPS, under the
breakers. To access the terminals remove the front protection, extracting the fixing bolts.
Mains connection
The connection to the mains must be carried out with protection fuses between the
mains and the UPS.
The use of differential protection devices in the line supplying the UPS is
unadvisable. The leakage current to ground due to the RFI filters is rather high
and it can cause spurious tripping of the protection device.
According to CEI EN62040-1 standard, in order to take into account the UPS'
leakage current, residual current devices having adjustable threshold can be used.
Input Fuses (A)
Input cables
2
(mm
)
Ground cables
Output cables
Battery cables
26 OMD36055 REV. D
Installation and start-up of UPS Keor Hp 200-300kVA
Installation et démarrage de l'UPS Keor Hp 200-300 kVA
Installazione e avviamento UPS Keor Hp 200-300kVA
Electrical connection data
Power (kVA)
Rectifier
Bypass
Rectifier
Bypass
2
(mm
)
2
(mm
)
2
(mm
)
200 250
3x400 3x500
3x500 3x500
3x150 3x185
4x185 2x4x120
95 120
4x185 2x4x120
2x185 2x240
300
3x630
3x630
2x3x95
2x4x150
150
2x4x150
2x2x150