Specifications

Galaxy 5000 technical specifications
MGE UPS SYSTEMS SPTC5 500 UK – 09/2005 page
15
Imbalanced conditions
For a 100% load imbalance, shift remains less than 2% of the phase-to-neutral voltage in amplitude.
High efficiency even at low percent loads
Up to 94% in double-conversion mode
Due to the innovative technology implemented in Galaxy 5000 (sixpack IGBT modules, no transformer, high-
tech output filter), efficiency is high, particularly at typical percent loads. Galaxy 5000 efficiency is virtually
constant for percent loads between 25 and 100%, whatever the type of load. That means significant savings
on the energy bill and in sizing air-conditioning and ventilation systems.
100
1000 25 50 75
Load (%)
E
f
ficiency (%
)
94
92
93
94
Fig. 10. Efficiency.
97% in ECO mode
In ECO mode, efficiency can rise to 97% when bypass AC power is stable and within tolerances.
Thermal overloads
High overload capacity
The inverter operates for a maximum time that depends on the current drawn to protect components against
excessive temperature rise. The overload-capacity curve (fig. 11) corresponds to:
 2.7 In for 150 ms (current limiting), bypass AC power outside tolerances
 125% for 10 minutes - 150% for 1 minute - 220% for 1 second.
This capacity is sufficient to clear most overloads. If capacity is overrun, the inverter shuts down and the load
is transferred to the bypass AC input.
Time (ms)
I / In
0.1 1 10 100 1000 1000 10000
1
1,2
1,4
1,6
1,8
2
2,2
60 600
Fig. 11. Overload-capacity curve.
Discrimination
If bypass AC power is within tolerances and a load fault occurs, the system transfers to the bypass AC input
and installation discrimination is ensured by the upstream and downstream protection devices. Recommended
upstream devices are:
 from 20 to 60 kVA, Compact NS 125 N, H or L (*) circuit breaker with TMD 125D trip unit
 de 80 to 120 kVA, Compact NS 250 N H or L (*) circuit breaker with TMD 250D trip unit.
(*) depending on the short-circuit current upstream of the installation point.
The downstream device (circuit breaker or fuse) must correspond to the load and be compatible with the
upstream device.