User manual

15
Emerson Energy Systems MFA150 Power System
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NT6C28C User Manual
Introduction
Description
The NT6C28C(x) MFA150 power system is a positive ground, –48 V dc
nominal, 150 A capacity power system consisting of a control and
distribution panel and power shelves which support plug-in rectifiers
mounted on a relay rack type framework.
An intelligent controller/monitor (RPM1000C), a temperature
compensation module ( Helios TCM/48 ), a low voltage disconnect (LVD)
feature, a battery disconnect panel, a supplementary battery return busbar,
and battery shelves for rack mounted batteries are available as options.
The NT6C28C(x) MFA150 power system is a front access power system.
All installation, operation and maintenance activities can be done from the
front and top of the power system. A minimum space of 3 inches ( 7.6
cm ) is required behind the NT6C28C(x) MFA150 power system for
ventilation.
The NT6C28C(x) MFA150 power system is intended for non-seismic and
seismic applications up to zone 4 (Bellcore) depending upon the relay rack
selected.
• The standard 7-foot ( 2.13 m ) rack is for non-seismic applications.
• The earthquake braced 7-foot ( 2.13 m ) rack is for top braced
applications.
• The 4-foot ( 1.22 m ) and 7-foot ( 2.13 m ) seismic racks are for
seismic freestanding applications (no top support required).
• The 25.36-inch ( 64.41 cm ) rack is for wall mount applications.
All of the various panels used in making the System 200/48 can be
mounted on frameworks having mounting holes with either 1.0-inch or
1.75-inch spacing.
The NT6C28C(x) MFA150 power system provides a variety of
monitoring, alarm and control features, such as low voltage alarm, fuse
and circuit breaker alarms, rectifier failure alarms, equalize, and an
optional low voltage disconnect (LVD).