Siemens 400 V / 210...590 A operating instructions Description, DC link voltage, Operating range

01.2004 Description

2 Description

The AFE (Active Front End) rectifier/regenerative feedback units belonging to the SIMOVERT MASTERDRIVES AFE series are power electronics devices that are available as cabinet units, as chassis units and as compact units.

The chassis units of type G to J described below are available only in the 400 V mains voltage range.

The units can be operated on a 3-phase mains with or without an earthed neutral point.

♦400 V mains voltage range:

3AC 380 V (− 20 %) to 460 V (+ 5 %)

The core component of the AFE rectifier/regenerative feedback unit consists of a voltage source converter with the CUSA control unit and it generates a controlled DC voltage, the so-called DC link voltage, from a 3-phase mains.

This DC link voltage is kept constant almost independently of the mains voltage (also in the event of regenerative feedback). The prerequisite for this is that the DC voltage setpoint is within the operating range defined below.

DC link voltage	Minimum:	1.53 times the rms value of the connected mains voltage.
operating range		Explanation: the DC link voltage of the AFE inverter must
		at least be greater than the peak rectified value of the
		applied mains voltage to ensure that the power system is
		no longer controlled via the freewheeling diodes of the
		IGBT switches.
	Maximum:	for the 400 V mains voltage range: 740 V DC

Siemens AG 6SE7087-6CX86-2BA1	2-1
SIMOVERT MASTERDRIVES AFE Operating Instructions