05.2006
Description
Siemens AG
6SE7087-2JD60
SIMOVERT MASTERDRIVES
Operating Instructions
2-1
2 Description
The frequency converter is a power electronics component for feeding
three-phase drives in the output range from 2.2 kW to 37 kW.
The unit can be operated from a three-phase system with a frequency
of 50/60 Hz and a voltage in the range of the values indicated on the
rating plate (200...230 / 380...480 / 500...600 V).
The three-phase current from the system is rectified, smoothed and fed
onto the capacitor DC link.
The inverter enables a variable output frequency between 0 Hz and a
maximum of 600 Hz to be generated from the DC current with the pulse
width modulation method (PWM).
The internal 24 V DC voltage is supplied through an integral power
supply unit from the DC link.
The unit is controlled by the internal closed-loop control electronics, the
functions are provided by the unit software.
Operator control is via the PMU operator control panel, the user-friendly
OP1S operator contol panel, the terminal strip or via the serial
interfaces of the bus system. For this purpose, the unit is provided with
a number of interfaces and six slots for the use of optional boards.
Pulse encoders and analog tachometers can be used as encoders on
the motor.
Motor
connec-
tion
U2/T1
V2/T2
W2/T3
PE2
Control electronics
Serial
interface
Terminal strip
Optional
boards
DC link
U1/L1
V1/L2
W1/L3
PE
C / L+
D / L -
PE1
PMU
Inverter
Pre-charging
Rectifier
Internal
power
supply
24 V
==
==
Fig. 2-1
Circuit principle of the frequency converter
Range of application
