Conformance with existing cables

DOE-SPEC-3021-97

ATTENTION:

Use the entire following paragraph if replacing an existing UPS system or if total UPS system input and output

current values are known, including amount of current required to recharge batteries from a fully-discharged

state. Otherwise, use only item f (Cable Entry).

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Conformance with existing cables. The UPS system shall accommodate the

3.2.6

following existing facility cables.

ATTENTION:

Enter the number and size of cables for each conduction path. The specifier must also indicate whether the

cables will enter the UPS from the top or the bottom of the enclosure.

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a. Normal Supply:

No/ph

Size

[AWG] [kcmil]

b. Bypass Supply:

No/ph

Size

[AWG] [kcmil]

c. UPS Output

(Uninterr. AC Bus):

No/ph

Size

[AWG] [kcmil]

d. DC Supply:

No/ph

Size

e. Enclosure Ground:

[2/0 AWG] [4/0 AWG] [

]

Cable Entry:

[Top] [Bottom] [

3.2.7

Overload capacity.

a. 30-Second Overload: 150% of rated.

b. 25-Millisecond Overload: 200-300% of rated.

3.2.8

Efficiency. The UPS system shall operate as specified at the following

efficiencies, where efficiency is defined as power in/power out with the battery on

full charge:

a. Full load at unity pf = 92% to 95%

b. Half load at unity pf = 85% or better

c. Full load at 0.8 lagging pf = 92%

d. Half load at 0.8 lagging pf = 85%