User manual

Operation 47
Emerson Energy Systems MFA150 Power System  NT6C28C User Manual
Rectifiers
The rectifiers provide isolated, filtered and regulated DC power, from a
single-phase AC source, for powering the load while charging a positive
grounded battery.
The output is adjustable over a range of –46 to –59.5 V for floating a 23-
or 24-cell battery string.
The rectifiers are equipped with AC input and DC output circuit breakers,
a digital ammeter, potentiometers for adjusting the thresholds, and LED
indicators for alarm indications.
The rectifiers use high frequency switching technology and are forced air-
cooled.
Refer to the appropriate rectifier user manual listed in Appendix D for
detailed operation information on the MR15 rectifier, the MPR25 rectifier,
the Helios Rectifier 25/48, and the Helios Rectifier 50/48.
RPM1000C ( optional )
The RPM1000C is a microprocessor-based controller/monitor which, in
addition to providing the basic controller functions found on analog
controllers, provides advanced control and monitoring functions. It can
monitor and record the operational data of the power systems that can be
locally or remotely accessed or retrieved for further analysis. The recorded
data can be accessed by means of the push-button or the RS-232 port on
the front panel, or remotely through the modem link.
If an RPM1000C was supplied with your system, refer to the appropriate
user manual listed in Appendix D for the detailed operational
characteristics.
Helios TCM/48 temperature compensation module ( optional )
The temperature compensation module ( Helios TCM/48 ) is used to
control the output voltage of the rectifiers according to the variations in the
temperature input. When the temperature rises, the Helios TCM/48
modifies the rectifier reference voltage to reduce it according to a pre-
programmed algorithm.
The Helios TCM/48 controls the battery voltage according to the
temperature to extend the life of the batteries and to eliminate the
possibility of a thermal runaway condition.
If a Helios TCM/48 was supplied with your system, refer to the
appropriate user manual listed in Appendix D for the detailed operational
characteristics.