Lenze MDSLS Servo spindle motor - Manual (Page 22)

Electrical installation
Important notes
5

22 BA 33.0003 EN 1.0
5 Electrical installation
5.1 Important notes

Danger!
Hazardous voltage at the power terminals, even if the plug is removed:
residual voltage > 60 V!
Before working at the power terminals, disconnect the drive controller from
the mains and wait until the motor stands still (voltage at the contact while
the motor is turning).
General z Observe the notes in the terminal box of the motor.
z Firmly tighten all connections.
z
Connect PE connector to earthing screw.
z
Fit connecting cable with strain relief.
z Carefully earth the motor.
Voltage
supply
Servo spindle
motors
z Servo spindle motors must be fed by servo inverters.
z
Connect the integrated encoder at the motor side with the
corresponding connections of the servo inverter.
Holding brake
(optional)
z
DC supply according to nameplate data of the brake or supply with AC
voltage via upstream rectifier (only spring-operated brake, PM brakes
205 V) 1)
z Brakes for 205 V can be fed from the 230 V mains via bridge rectifiers,
brakes for 103 V from the 115 V mains.
z
Do not supply brakes with half-wave rectifiers from the AC system.
Inverter
operation
z
Observe the connection notes in the corresponding operating
instructions.
z Ensure that motor and inverter are correctly assigned.
z In particular, observe the speed limits and winding load. *
Cable cross
sections
z Correctly dimension the connecting cables to avoid impermissible
heating.
z
Maintain minimum cross sections to DIN 57100 and secure
appropriately (see Tab. 1).
Motor
protection
Protection against
overload
z Common current-dependent motor protection switches for average
operating frequency
– Set to rated current as indicated on the nameplate.
z
With very high operating frequency: Use three-phase AC motors from
Lenze with thermal switches or PTC thermistors in the winding.
– The thermal switches are integrated in the winding as NO contact or
NC contact. The response temperature is permanently set.
Motor supply cable z No protection possible via overtemperature protector switches or PTC
thermistors of the motor winding
– Take measures according to DIN 57100 / VDE 0530.
Inverter operation
z
The current or voltage conversion can increase the output current
significantly above the input current.
– The motor supply cable cannot be fused via the mains input fuses of
the inverter. Take measures according to DIN 57100 / VDE 0530.
1) Supply PM brakes for 24 VDC only with smooth DC voltage (ripple ≤1%)
* Voltage limits: 1.5 kV peak value, 5 kV/µs rate of rise; additional information: see the data sheet.
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