gefran TPD32-EV-...-2B, Instructions Manual, Page: 482 / 504

—————— TPD32-EV ——————
482
Connection of current transducers and thermal switch(es)
The secondary windings of the two AC current transducers and any thermal circuit breakers (bimetal thermostats)
on the power bridges are connected to the KPT31 connector. A specific cable already fitted with the relative
KPT31 connector at the CU end and free conductors at the other end is supplied (“KPT31 connector interface
cable for TPD32-EV-CU”, EAM2763).
Terminal Function Min. cable cross-section Max. cable cross section Tightening torque
1, 2, 3 * Connection of bimetal thermostats 0.25 mm
2
(24AWG) 2.5 mm
2
(12AWG) 0.5 …0,6Nm
5, 6, 7, 8 CT connection Recommended : 1 mm
2
(18AWG)
n
ote
! If the NC thermal contact (bimetal thermostat) connected between terminals 1 and 2 is not
used, these must be jumpered. Terminal 3 is already jumpered internally with terminal 2 via
jumper S2 on the FIRXP-XX power card, as standard. Terminal 4 is not used.
Detail of connection of current transducers:
brown
blue
red
C
T
-U
C
T
-W
5
6
7
8
K
P
T
3
1
b
ro
w
n
brown
U W V
Twisted
wires
Twisted
wires
Connection of pulse transformers
The primary circuits of the pulse transformers are connected to connector KPT11 (and KPT21, where applicable)
for switching the SCRs on. A specific cable already fitted with the relative KPT11 connector at the CU end and
free conductors at the other end is supplied (“KP11 connector interface cable for TPD32-EV-CU”, EAM2764).
For details of wiring, see ESE5771 showing the connection of a 4Q bridge (reversible). With a 2Q bridge, the two
conductors labelled “MN” are not used. Their free end must therefore not be connected but electrically isolated.
Regulation power supply
As for the entire TPD32-EV-… series, the regulation power supply is connected to terminals U2-V2 on the
FIRXP-XX power card. To access this, remove the plastic cover at the bottom.
This card also contains terminals 35-36, 75-76 and 78-79 which have the same function on all units in the TPD32-
EV-.. series and have already been described in chapter "4.4 Regulation Section" on page 69.
Cable cross-sections and tightening torque
Terminal Function Min. cable cross-section Max. cable cross section Tightening torque
U2, V2 Regulation power supply
0.25 mm
2
(24AWG)
2.5 mm
2
(12AWG)
0.5 …0.6 Nm
35, 36 Contact OK Relay
75, 76 Relay 2 contact
78, 79 Motor thermistor