| AC |
Alternating
Current electrical power supplied by a utility
company or from an AC generator. |
| AC
Distribution |
A
module in the Intergy power system that
distributes AC power to other Intergy power system
modules. |
| AC
Metering |
Measurement
of AC power input voltage and current parameters
by sampling. The results of the measurements are
used to calculate the rms equivalents for voltage,
current and power, and also calculate the power
factor and frequency. |
| Active
Load Share |
A
current sharing scheme controlled by the SM50 that
adjusts the output voltage of individual
rectifiers so that all rectifiers in a system
produce the same output current. |
| Active
Voltage Control |
The
SM50 adjusts the rectifier output voltages to
maintain a constant system voltage (measured at
the output or battery) independent of load
fluctuations during normal operation. |
| AVC |
Active
Voltage Control |
| Battery
Capacity |
The
battery ampere-hour capacity at full charge,
standard temperature, and at a specified (usually
C10) discharge rate. |
| Battery
Current Limit |
System
voltage control that limits the battery charge
current to a preset value. |
| Bus
Voltage |
The
actual voltage supplied to the load as measured at
the bus bars. |
| C10 |
Symbol
for ampere-hour capacity of a battery at the
10-hour discharge rate, to a specified end
voltage. |
| CE |
Conformite
Europeene (European Conformity) |
| Configurable
Parameter |
An
item that is stored in the SM50 non-volatile
memory and that defines some part of the SM50
operation. All configurable parameters may be set
using the Intergy Configuration Editor. Most may
also be set from the SM50 keypad and display or
from PowerManager. |
| Configuration
File |
The
information or data loaded into and the
supervisory module that controls the behavior of
an Intergy power system to suit the particular
requirements of a customer’s site or
installation. |
| Configuration
Database |
This
is the total set of configurable parameters. |
| Conformite
Europeene (European Conformity) |
CE
marking is used to signify that a product complies
with all the applicable performance and safety
standards adopted by the members of the European
Union and is therefore certified for sale in
European Union countries. |
| Current
Share |
A
process used to balance output currents between
rectifiers. See Active Current Share. |
| DC |
Direct
Current |
| DC
Distribution (DCD) |
A
module in the Intergy power system that
distributes DC power to the loads. It also
provides protection for the load cables. |
| DC
Distribution—Fused version (DCF) |
A
DC Distribution module that uses fuses for
protection. |
| DC
Distribution—Modular Circuit Breaker (MCB)
version (DCM) |
A
DC Distribution module that uses modular circuit
breakers for protection. |
| Digital
Input |
An
input which recognizes an open-circuit and
short-circuit. |
| Digital
Output |
A
voltage free relay contact. |
| EMC |
Electro
Magnetic Compatibility. |
| Equalize |
This
is the process of increasing the Float Voltage to
the Equalize Voltage to recharge or equalize the
batteries. |
| Event |
An
alarm activation or de-activation. |
| Fast
Charge |
Increasing
the Operating Voltage after a battery discharge,
following an AC failure, to give a rapid battery
recharge. |
| Float
Voltage |
The
set output voltage of the DC power system (not
including temperature compensation or other
adjustments). |
| Front
Panel Keypad/Display |
The
SM50 local user interface. |
| Front
Panel RS-232 Port |
The
SM50 front panel serial interface, used for local
configuration via a laptop PC. |
| Graphic
User Interface (GUI) |
A
computer system using graphics images on the
screen rather than text to display applications
information for the user. As used in the
PowerManager software. |
| Hardware
Default Voltage |
The
rectifier output fail-safe operating voltage used
if the rectifier microprocessor fails. |
| High
Rupturing Capacity (HRC) (fuse) |
A
precisely rated fuse which will operate under high
fault current conditions, without
self-destructing. |
| Host
Port |
The
serial port used for connecting the SM50 to a
remote computer via an RS-485 or an RS-232C
connection. |
| Host
Serial Port |
One
of the two serial ports (RS-232C or RS-485) with
connectors at the rear of the SM50. |
| I/O |
Input/Output |
| I/O
Board |
A
component board in an SM50 Monitor. This board is
used to gather system digital and analogue inputs,
and control digital outputs. |
| ICE |
Intergy
Configuration Editor software running under
Windows 95®
or
Windows NT®
which
allows editing of the SM50 configuration. |
| ILS |
Intergy
Large Power System |
| IMPS |
Intergy
Mini Power System |
| Power
System |
A
rack module, single rack or several parallel
connected racks, providing DC power to a single DC
bus. |
| IPS |
Intergy
Medium Power System |
| LCD |
Liquid
Crystal Display |
| LED |
Light
Emitting Diode, usually a single color, used as an
Indicator. |
| Load
Bus |
The
bus to which the Load equipment is connected. |
| Low
Voltage Disconnect (LVD) |
A
module in the Intergy power system that
disconnects the load from the batteries from the
when the battery voltage falls below a preset
value. The LVD reconnects the load to the
batteries when the battery voltage rises above a
preset value. |
| Management
Information Base (MIB) |
The
structure of the database in an Intergy power
system. |
| Mapping |
The
process of assigning physical entities to logical
entities, e.g. when a particular analogue channel
(internal or external) is assigned to be the
channel used for measuring the bus voltage. |
| Maximum
System Current |
The
maximum current that can be supplied by from an
Intergy Power System (excluding batteries) under
all conditions. Normally 120% of Rated System
Current. |
| MCB |
Modular
Circuit Breaker. A precisely rated, resettable
circuit protection device. |
| MOV |
Metal
Oxide Varistor. A non-linear semiconductor device
used for surge protection or voltage limiting. |
| Nominal
System Voltage |
The
DC output voltage generally used to describe a
type of system, usually 24 V or 48 V. |
| Null
Modem Cable |
A
special cable for connecting two RS-232 ports or
devices directly, in place of a modem connection. |
| Operating
Voltage |
The
voltage the SM50 is configured to maintain at the
load, after adjustments for temperature
compensation, equalize, etc. |
| Output
Enable Delay |
The
delay between the start of primary side switching
and the start of output current walk in. This is
in two parts: a fixed hardware delay controlled by
the secondary side control circuits and an
adjustable delay controlled by the microprocessor.
During this period the output voltage is at the
minimum of approximately 40 V. |
| Overvoltage
Shutdown (OVSD) |
A
protection method that will shutdown any rectifier
module with an output voltage over a preset
maximum value. |
| Parameter |
A
configuration value that the user can set in the
SM50 configuration database. This value is stored
in non-volatile Flash memory. For example: System
Float Voltage. |
| Preset
System Voltage |
The
preset voltage is normally defined by the customer
according to the nominal system voltage and the
ambient temperature of the battery. This is the
output voltage the rectifier uses in the event of
a communications failure with the SM50. It is set
to the system voltage specified by the customer
during systems final test but may be changed via
the SM50 or the rectifier front panel (if fitted). |
| Preset
Voltage |
The
voltage that a rectifier will default to if
communications with the Supervisory Module is
lost. Generally, this is set to the float voltage
by the Supervisory Module. |
| PSTN |
Public
Switched Telephone Network |
| Rated
Rectifier Current |
The
maximum output current of a rectifier at 58V for a
48 V (nominal) rectifier, or 29 V for a 24 V
(nominal) rectifier. |
| Rated
System Current |
The
sum of the rated rectifier currents in the Intergy
power system. |
| Rectifier |
A
module fitted to the Intergy power system that
converts AC input power to regulated DC output
power. |
| Rectifier
Bus |
The
bus to which the outputs of the rectifiers are
connected. |
| Rectifier
Magazine |
A
module in the Intergy power system used to connect
the rectifiers to other modules in the Intergy
power system. |
| Rectifier
Voltage |
The
voltage to which the rectifiers are set. This is
assumed to be the same for each rectifier and does
not include current share adjustments. |
| Redundancy |
The
use of multiple rectifier modules in a DC power
system to provide sufficient output current is
available for the load if a one (N+1) or
occasionally more (N+2 etc) rectifier module
fails. |
| Reserve |
Battery
time remaining to end of discharge |
| RFI |
Radio
Frequency Interference |
| RM |
Rectifier
Magazine |
| RS-232C |
A
common point-to-point hardware configuration for
serial communications. |
| RS-485 |
A
multidrop hardware configuration for serial
communications. There is no intrinsic method of
bus collision detection in RS-485, so higher
layers in the protocol stack must take this into
account. |
| Simple
Network Management Protocol |
An
internet term for a protocol used to communicate
between SNMP managers and agents. Managers can
read and write items in the agents MIBs and agents
notify managers of exceptions. |
| Slope
Discrimination Method |
A
scheme that causes the Overvoltage Shutdown set
point to fall with increasing load. |
| SNMP |
Simple
Network Management Protocol |
| Start
Up Delay |
The
interval between power on and the start of current
walk in. It is the sum of the Primary Enable Delay
and the fixed and adjustable portions of the
Output Enable Delay. |
| Supervisory
Module (SM20, SM30 or SM50) |
The
module that monitors and controls the operation of
the DC power system. |
| System
Voltage |
The
nominal voltage of the Intergy power system, equal
to the nominal voltage of the rectifier modules.
48 V or 24 V. |
| Temperature
Compensation |
Adjustment
of the rectifier output voltage to provide the
optimum charging voltage for the battery. One of
the components in system voltage control,
calculated by the Supervisory Module calculation
based on battery temperature. |
| Temperature
Sensor |
A
sensor that is used to produce a variable
electrical output representing the temperature of
a component, typically a battery. |
| UL |
Underwriters
Laboratories. An approval organization based in
the United States. |
| Walk-In
Time |
The
time that the rectifier takes to reach rated
output current after the Start Up Delay. The slope
is fixed so that a lower output current will have
a shorter walk in period. |
| Walk-In |
The
process of gradually ramping up rectifier output
voltage (and current) at start up to prevent a
large input current surge.
|
