KEB COMBIVERT F6, Инструкция по эксплуатации

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GB - 35
Connection Power Unit
Braking resistor with over-heat protection and GTR7 monitoring
T1 T2
L1
L2
L3
K3
2
U V W
L1 L2 K1 K2 L3
1
4
3
6
5
12
11
G1
R1
+PA
PB
OH1
OH2
I1
OH1
OH2
PE
DR1
HF1
F
R2
+24V
S2
K1
I1
K2
GTR7-Error
G1
K3
GND
S1
K3
11
12
H1
0V
R1
OH2 OH1
DR1
OH2 OH1
K3 Line contactor with auxiliary contacts R1 Braking resistor with temperature switch
S1 Key for switch on R2 PTC or KTY84 sensor e.g. of the motor
S2 Emergency stop circuit braker for switch off DR1 Mains choke with temperature switch (optional)
H1 Tripping control HF1 HF filter
G1 Inverter with GTR7 evaluation (relay 30 V DC/ 1 A) and programmable input I1
The figure serves only as an example and must be adjusted according to the appli -
cation.
2.7.5.3 Braking resistor with over-heat protection without GTR7 monitoring
This circuit offers a direct protection with defective GTR7 (braking transistor). The braking re-
sistor overheats and opens the OH terminals with defective GTR7. The OH terminals open the
holding circuit of the input contactor, so that the input voltage is switched off in error case. An
error in inverter is released by opening the auxiliary contacts of K3. Regenerative operation is
also secured by the internal fault disconnection. The input must be programmed and inverted
to "external error". Automatic restarting after cooling of the braking resistor is prevented by the
self-holding circuit of K3.
If the PTC/KTY evaluation of the motor at terminals T1/T2 is not used, these termi-
nals can be used instead of the programmable input. The temperature input must
be operated in PTC mode.