Danfoss VLT 5000 Bedienerhandbuch Seite 21
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21
Wiring
• Motor Wiring
– Use Terminals 96, 97, 98
– Check torque – page 53
– Distance limits – Disconnect OK
A disconnect switch between the drive and motor may be required to meet electrical codes.
During operation if the disconnect switch is opened, no harm is done to the drive or motor. If
the disconnect is then closed and the drive is running, the motor may attempt to draw locked
rotor current from the drive. This may cause the drive to shut down on an over-current fault
trip. In order to avoid such a nuisance trip, it is best to wire an auxiliary contact from the
disconnect switch back to the drive's start circuit. Then, if the disconnect is opened while the
drive is running, the drive immediately shuts off. When the disconnect switch is closed, the
drive begins from a stop and smoothly accelerates the motor to the desired speed.
The maximum cable distance between the drive and motor for unshielded cable is set for
300m (1000 feet). If multiple motors are wired to one drive, the total distance from the drive
to all the motors does not exceed 300m (1000 feet).
If shielded cable is used as pictured above, the distance is dropped to 150m (500 feet). The
wires in the shielded cable are more compressed, which means that the capacitance
between the cable and ground is increased. A shorter distance is therefore needed for
proper operation.
- VLT 5000 Installation 1
- Startup Check List 1
- Reference Material 3
- Hp to kW Chart 4
- The Nameplates 5
- Pre-Installation Check 10
- Installation Checks 11
- Mounting the Drive 15
- Wiring the Drive 16
- • General Information 20
- • Motor Wiring 21
- – External 24Vdc 22
- – Load sharing for EB units 22
- • Control Wiring 23
- – Normally Open - Momentary 25
- 32 or 33 28
- • Digital Inputs – Continuous 30
- • Digital Inputs 31
- – SPDT Center OFF 32
- • Digital Inputs – Encoder 35
- • Analog Inputs – 0 to 10Vdc 36
- • Analog Inputs 37
- • Analog Outputs 41
- • Analog Output - Pulse 43
- • Digital/Relay Outputs 44
- • Serial Communications 45
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