Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE User Manual
Page 6
Operating Instruction
6
The TECHNOVAR drive head contains electronic safety devices which
switch off the control element in the event of faults, whereby the
motor has zero current but remains energized and comes to a halt. The
motor can also be halted by mechanical blocking. If it is switched off
electronically the motor is disconnected from the mains voltage
through the electronics of the frequency converter but is not potential-
free in the circuit.
In addition voltage fluctuations, especially power failures can cause the
system to switch off itself.
The system may only be put into operation when it has been earthened. In addition,
equipotential bonding of all pipes must be ensured.
Warns that failure to observe the precautions may cause electrical shock.
Failure to follow these instructions could result in serious personal injury or death.
Warns that failure to follow these instructions could result in serious personal
injury or death as well as property damage.
Repair of faults can cause the motor to start up again!
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