Nautel XR6, Руководство по предварительной установке

Страница: 44 / 90

XR6/XR3 Pre-installation Manual Control and monitoring
Page 6-2 Issue 3.0 2009-07-15
LVPS fault
The +24 V, +15 V, -15 V and +5 V power supplies are monitored. A fault will be reported if the
voltage varies by more than ± 10%.
• One or more of these faults will result in only one
LVPS Fault
message on the
Status
screen,
though each one would be logged separately in the
Event Log
.
High B+ voltage
A fault is reported when the B+ voltage goes above 380 V. No other action will be performed
automatically.
Low B+ voltage
For three-phase XR6 transmitters, there are three B+ voltage levels that will be automatically selected
to provide optimum performance: 315 V, 190 V and 115 V. For three-phase XR3 transmitters, there
are two B+ voltage levels: 220 V and 115 V. For single-phase XR6 transmitters, there are four B+
voltage levels: 315 V, 196 V, 115 V and 69 V. For single-phase XR3 transmitters, there are four
B+voltage levels: 220 V, 196 V, 115 V and 69 V.
This alarm is triggered when the B+ voltage falls below the factory-set alarm threshold. The alarm
threshold is factory calibrated to be approximately 250 V, 150 V or 91 V - for three-phase XR6
transmitters - to correspond to the B+ voltage level currently in use. For three-phase XR3
transmitters, the alarm threshold voltage is factory calibrated to be approximately 174 V or 91 V. For
single-phase XR6 transmitters, the alarm threshold voltage is factory calibrated to be approximately
250 V, 155 V, 91 V or 55 V. For single-phase XR3 transmitters, the alarm threshold voltage is factory
calibrated to be approximately 175 V, 155 V, 91 V or 55 V.
Besides being noted on the transmitter’s GUI
Status
screen, and by the alarms, this alarm also causes
the following:
• a shutback
• the softstart relays to open
• the fans to turn off
Recovery from this alarm is automatic when the B+ voltage rises above the factory-set alarm
threshold, which is factory-calibrated to 265 V, 160 V and 97 V - for three-phase XR6 transmitters -
depending on which B+ voltage is selected (see
“Low B+ voltage” on page 6-2 ). For three-phase
XR3 transmitters, the factory-calibrated threshold is 185 V or 97 V. For single-phase XR6
transmitters, the factory calibrated threshold is 265 V, 165 V, 97 V or 59 V. For single-phase XR3
transmitters, the factory calibrated threshold is 185 V, 165 V, 97 V or 59 V. The recovery process is
the same as the power on process.