BENSHAW RediStart EXEXMVRMX3 Series, Руководство пользователя

Страница: 210 / 222

Interface Board This circuit board take line-side and load-side voltage feedback signals from the voltage feedback
board and passes them via pin cables to the processor.
J
Jogging Is a means of accomplishing momentary motor movement by repetitive closure of a circuit using a
single push button or contact element.
Jumper A short conductor with which you connect two parts.
K
Keypad Is a 2 line x 16 character LCD display with backlighting for low ambient conditions. The display reads
out in truncated english and can show multiple data points in each screen.
L
LCD Liquid crystal display, which is a reflective visual readout device commonly used in digital watches
and laptop computers.
Locked Rotor Torque The minimum torque that a motor will develop at rest for all angular positions of the rotor with rated
voltage applied at rated frequency.
Low Voltage Low Voltage electronics include the keypad operator interface, CPU, main power PC board and are
located in isolated low voltage compartments of the enclosure.
M
Main Power Board This is also referred to as the firing board. It contains the digital I/O relays and interfaces to the
terminal for user interface. See "terminal and control". It also controls the sequencing of the isolation
and bypass contactors with the SCR firing. This board generates all firing signals for the SCR stacks
and receives feedback signals from the fiber optic transmitters. It converts analog levels to digital
signals for the CPU. These firing pulses are via fiber optic signals to isolate them from the medium
voltage environment.
Medium Voltage Control electronics are located in the medium voltage section of the soft start. The main line power
must be disconnected before accessing these electronics, which include the TCB (terminal and control
board), gate drive, and temp/CT(current transformer) board.
ModBUS A registered based, multi-point network
Mode A selected method of operation. For example; run
N
Normally Closed Contacts A set of contacts on a relay or switch that are closed when the relay is de-energized or the switch is
de-activated. They are open when the relay is energized or the switch is activated
Normally Open Contacts A set of contacts on a relay or switch that are open when the relay is de-energized or the switch is
de-activated. They are closed when the relay is energized or the switch is activated.
O
P
Port Power outage ride-through
Power Factor A measurement of the time phase difference between the voltage and current in an AC circuit. It is
represented by the cosine of the angle of this phase difference. Power factor is the ratio of Real Power
(kW) to total kVA or the ratio of actual power (W) to apparent power (volt-amperes).
Preset Speed Refers to one or more speeds at which the drive will operate.
Programmable Controller A solid state system that has user-programmable memory for storage of instructions to implement
specific functions such as I/O control, logic, timing, counting, report generation, communication,
arithmetic, and data file manipulation. A controller consists of a central processor, input/output
interface, and memory. A controller is designed as an industrial control system.
Protocol A set of conventional governing the format and timing of data between communication devices.
Q
R
Ramp Is the charted path that the torque, current, power, follows will achieving maximum torque.
Ramp Time Is the time it takes for the torque to go from the initial torque, current, power setting to the maximum
torque, current, power setting.
200
APPENDIX G - APPLICATION GLOSSARY