Alarms

DOE-SPEC-3021-97

3.3.7

Alarms.

ATTENTION:

Designate a preference for either an instantaneous or time delayed alarm, as well as whether the alarm contact

should be normally open or closed.

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a. The UPS system will initiate an [instantaneous] [time delayed] alarm signal

upon loss of normal and bypass source.

b. Alarm contacts shall be [normally open] [normally closed].

Maintenance bypass switch. Provide a manually-operated maintenance bypass

3.3.8

switch, make-before-break type, to isolate the inverter and static switch for

maintenance and repair. The switch operation shall be inhibited if the external

bypass source is outside the limits specified in paragraph 3.3.2.7.

3.3.9

Materials. All materials shall be new and shall be selected by the Seller to

perform as specified herein. Like parts shall be interchangeable. Workmanship

shall be neat, comply with recognized industry standards, and shall be in

accordance with accepted engineering practices.

3.3.10

Enclosure. The UPS system shall be housed in NEMA ICS 6 type-[1] enclosure,

heavy duty, reinforced steel, freestanding cabinet which requires access only

from the front (hinged front panels). Unless specified otherwise in

paragraph 3.2.6, make provisions for Owner's control and power cables to enter

either the top or the bottom of the cabinet.

Ground bus. Provide a copper ground bus with a cross section of at

3.3.10.1

least 1/4 x 1 inch in the cabinet, with connections to all ac-system

neutrals and compression-type connector for the Owner's copper

grounding cable (such as Burndy "YA" or equivalent.)

3.3.10.2

Access. Provide quick and convenient access, preferably by a

hinged door or panel, to the protective devices and control circuit

disconnecting devices provided.

3.3.10.3

Lifting devices. Provide suitable lifting devices (e.g., lifting eye

bolts) for each unit.

3.3.11

Wiring. Provide control wiring and termination facilities in accordance with the

following requirements.