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CONNECTION Of THE POWER UNIT
4.3.2.5 Motor cable length
The maximum permissible resulting motor cable length per inverter module is 30 m.
Longer cables, standard cables with a larger capacitive coating against shield / PE and
cables with much bigger cross-section than required can:
•
•
•
The resulting motor cable length for parallel operation of motors, or parallel installation
with multiple cables arises from the following formula:
resulting motor cable length = ∑single cable lengths x √Number of motor cables
4.3.2.6 Interconnection of the motor
NOTICE
NOTICE
NOTICE
4.3.3 Temperature detection
The COMBIVERT T6
put has basic isolation. The operating mode can be selected by software. The operating
mode can be used for the following functions:
function
Motor temperature display and monitoring
Motor temperature display and monitoring
Motor temperature monitoring
General error detection
Table 22:
Reduce the overcurrent capability of the inverter.
Have a negative influence on the interference behaviour (radiation and cable-fed volt-
age).
Damage the device if necessary.
Incorrect behavior of the motor!
► The connection instructions of the motor manufacturer are always
generally valid !
Protect motor against voltage peaks!
► Drive inverters switch at the output with high dV/dt. Voltage peaks
that endanger the insulation system at the motor can occur espe-
cially in case of long motor cables (>15 m).
Connection of the drive in star connection!
► The star point must not be earthed.
has implemented a switchable temperature detection. The in-
APD
Possible applications of temperature detection
„basic insulation" against SELV voltage of the control
A system voltage (Phase – PE) of 300 V is defined. Consequently, the con-
nected sensors also must have a „basic insulation" to the mains potential (e.g.
motor winding).
Temperature detec-
tion
KTY84
PT1000
PTC
PTC
69
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