Vacon NX User Manual

10
vacon • 174 Active front end (NXA)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
10.11 Each Active Front End unit has the pre-charcing circuit
Each Active Front End can have an own pre-charging circuit, and each unit is controlling it’s own pre-
charging and main contactor, see Figure 97. One control switch can be used but if an Active Front
End unit needs to be controlled independently, separate switches are needed. With this the system
is more redundant than with a common pre-charging circuit. The circuit diagram for control, see
Figure 94 and Figure 95.
Figure 97. Active Front End units parallel connection with own pre-charging circuits
3080_uk

Vacon NX Specifications

General

Product Type	AC Drive
Control Method	Scalar Control
Enclosure	IP00, IP21
Communication	Ethernet
Safety	STO (Safe Torque Off)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Ambient Temperature Range	-10°C to +50°C (with derating above +40°C)
Cooling Method	Air-cooled, Liquid-cooled