9
DELPHYS MX
250 to 900 kVA
STANDARD AND OPTIONS
4.3. Recommended protection devices
RECOMMENDEDPROTECTIONDEVICES-Rectifier
(1)
Rated power (kVA) 250 300 400 500 800 900
D curve circuit breaker
(A) 630 860 1000 1600
RECOMMENDEDPROTECTIONDEVICES-General bypass
(1)
Rated power (kVA) 250 300 400 500 800 900
Maximum I
2
t supported by the bypass (A
2
s) 2250000 5120000
Icc max (A) 10600 24700
D curve circuit breaker (A) 630 800 1250 1600
RECOMMENDEDPROTECTIONDEVICES-Input residual current circuit breaker
(2)
Rated power (kVA) 250 300 400 500 800 900
Input residual current circuit breaker 300 mA
RECOMMENDEDPROTECTIONDEVICES-Output
(2)
Rated power (kVA) 250 300 400 500 800 900
Short-circuit inverter current (A) - (0 to 100 ms)
(whenAUXMAINSisnotpresent)
256000 256000 400000 841000 1600000
C curve circuit breaker
(3)
(A) 160 200 250 400
High-speed fuse
(3)
(A) 400 500 700 800
CABLES - Maximum cable section
Rated power (kVA) 250 300 400 500 800 900
Rectifier terminals
Copper bar (3x300 mm
2
) Copper bar (4x300 mm
2
)
Bypass terminals
Battery terminals
Outputterminals
(1) Rectifier protection should only be considered in the event of separate inputs. The bypass protection is given by recommendation.
When the bypass and rectifier inputs are combined (common input), the general input protection rating must be the highest of both
(bypass or rectifier).
(2) Must be selective with residual current circuit breakers downstream of the UPS connected to the UPS output. If the bypass network
is separate from the rectifier circuit, or in the event of parallel UPS, use a single residual current circuit breaker upstream of the UPS.
(3)SelectivityofdistributionaftertheUPSwithinvertershort-circuitcurrent(short-circuitwithAUXMAINSnotpresent).Theratingof
the protection can be increased by “n” times downstream a parallel UPS system, with “n” equal to the number of parallel modules.
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