Vacon NX User Manual

10
vacon • 170 Active front end (NXA)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
10.8 Pre-Charcing circuit
The Active Front End unit requires an external pre-charging circuit. The purpose of the pre-charging
unit is to charge the voltage in the intermediate circuit to a level sufficient for connecting the Active
Front End unit to the mains. The charging time depends on the capacitance of the intermediate
circuit and the resistance of the charging resistors. The technical specifications of manufacturer’s
standard pre-charging circuits are shown in Table 68. Pre-charging circuits are suitable for 380-500
Vac and 525-690 Vac.
The pre-charging components can be ordered separately. Components of the pre-charging circuit
are 2 pcs charging resistors, the contactor, the diode bridge and the snubber capacitor, see Table 69.
Each pre-charging circuit has maximum charging capacity, see Table 68. If the capacitance of the
intermediate circuit in the system exceeds the values shown, contact your nearest distributor.
Table 68. Capacitance Min and Max value for Pre-charging circuit
Pre-charging circuit ratings
Pre charging type Resistance
Capacitance
Min
Capacitance
Max
CHARGING-AFE-FFE-FI9 2 x 47 R 4950 μF 30000 μF
CHARGING-AFE-FFE-FI10 2 x 20 R 9900 μF 70000 μF
CHARGING-AFE-FFE-FI13 2 x 11 R 29700 μF 128000 μF
Table 69. Type designation code for the pre-charging components configuration
FI9 AFE / CHARGING-AFE-FFE-FI9
Item Q‘ty Description Manufacturer Product Code
1 1 Diode Bridge Semikron SKD 82
2 2 Charcing resistors Danotherm CAV150C47R
3 1 Snubber capacitor Rifa PHE448
4 1 Contactor Telemecanique LC1D32P7
FI10 AFE / CHARGING-AFE-FFE-FI10
Item Q‘ty Description Manufacturer Product Code
1 1 Diode Bridge Semikron SKD 82
2 2 Charcing resistors Danotherm CBV335C20R
3 1 Snubber capacitor Rifa PHE448
4 1 Contactor Telemecanique LC1D32P7
FI13 AFE / CHARGING-AFE-FFE-FI13
Item Q‘ty Description Manufacturer Product Code
1 1 Diode Bridge Semikron SKD 82
2 2 Charcing resistors Danotherm CBV335C11R

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