2
Product Information on Manual EM 148-FC Frequency Converter, Edition 04/2003
A5E00476687-03
Protective circuit (RC circuit) necessary when using motor brake
To prevent the motor brake from affecting the load supply voltage (3 x 400 VAC) of
the ET 200X frequency converter EM 148-FC, you have to use a RC circuit and
take note of configuration and mounting rules.
RC circuit
Wire the RC circuit as follows:
1. Metal--oxide varistor
-- with an operational voltage of 460 V (for example, EPCOS Type S20K460)
for power distribution systems with 400 VAC or
-- with an operational voltage of 550 V (for example, EPCOS Type S20K550)
for power distribution systems of 500 VAC.
2. RC combination of 33 R/ 2 W and 0.33
μ
F/ 630 VAC
L1
L2
L3
M
3
~
=
Frequency converter
Motor
Metal--oxide varistor (1)
RC combination (2)
Brake
8
5
6
4
7
1
3
6
8
2
RC circuit
Configuration rules
S
Configure the ramp and brake times > 0.2 s.
S
During configuration, take into account the cycle times of the CPU, the basic
module and the runtimes via PROFIBUS DP in order to realize shorter reaction
times for motors operated in parallel.
S
Take into account the internal reaction time of the motor brake.
Содержание SIMATIC EM 148-FC
Страница 56: ...Functions and Technical Specifications 4 22 EM 148 FC Frequency Converter A5E00065321 03 ...
Страница 66: ...Mode of Functioning 5 10 EM 148 FC Frequency Converter A5E00065321 03 ...
Страница 70: ...Dimensioned Drawing B 2 EM 148 FC Frequency Converter A5E00065321 03 ...
Страница 76: ...4 Product Information on Manual EM 148 FC Frequency Converter Edition 04 2003 A5E00476687 03 ...