2-6 Parameter Descriptions
7000-TD002A-EN-P – September 2007
Converter Air Flow [Convrter AirFlow]
Linear Number: 447
Minimum Value: -1.0 V
Maximum Value: 10.0 V
Access Level: Basic
Read/Write: Read Only
This parameter displays the output of the air pressure sensor in volts. It is an indication of the airflow in
the drive. A drop in pressure value indicates either a blocked air filter or a loss of cooling fan operation.
This parameter along with Conv Airflow Nom (317), Conv AirFlow Trp (319) and Conv AirFlow Wrn (320)
are used for protection.
Integral Isolation Transformer Air Flow [IsoTx AirFlow]
Linear Number: 653
Minimum Value: -10.0 V
Maximum Value: 10.0 V
Access Level: Basic
Read/Write: Read Only
This parameter displays the output of the air pressure sensor in volts installed in the Isolation
Transformer section of the A-Frame drive. This parameter operates with the same functionality as the
converter air flow pressure i.e. a decreasing value is an indication of blocked filters. This parameter
along with IsoTx AirflowNom (656), IsoTx AirFlowTrp (654) and IsoTx AirFlowWrn (655) are used for
protection. THIS PARAMETER IS ACTIVE FOR A-FRAME DRIVES ONLY.
Line Neutral Voltage [LineNeutral Volt]
Linear Number: 589
Minimum Value: -2.000 pu
Maximum Value: 2.000 pu
Access Level: Basic
Read/Write: Read Only
This parameter specifies the measured line side neutral to ground voltage in per unit. For PWM rectifier
drives, the drive uses the measured voltage of the line capacitor neutral. For SCR drives the drive
calculates the neutral voltage by summing the line to ground voltages from the master bridge (zero-
sequence).
Motor Neutral Voltage [Mtr Neutral Volt]
Linear Number: 347
Minimum Value: -2.000 pu
Maximum Value: 2.000 pu
Access Level: Basic
Read/Write: Read Only
This parameter specifies the measured motor neutral to ground voltage in per unit. The drive calculates
the neutral voltage by summing the line to ground motor voltages (zero-sequence).
Refer the following table for typical values of neutral voltages in the drive.
Rectifier type Line Neutral Voltage Motor Neutral Voltage
18 pulse > 0.3pu < 0.1pu (with grounding network)
6PWM(grounded system) < 0.1pu > 0.3pu
6PWM(floating system) > 0.3pu < 0.1pu (with grounding network)
6PWM(Direct-to-Drive) < 0.1pu < 0.1pu
To Next Page
Loading...
Need help?
General
