TECNA
S.p.A.
ITEM
TE700 Instruction
Manual
I MAX TR.1
Max supplied current
2.00 – 200.00 KA
TURNS TR.2
Transformer 2 turns ratio
1 – 200
I MAX TR.2
Max supplied current
2.00 – 200.00 KA
TURNS TR.3
Transformer 3 turns ratio
1 – 200
I MAX TR.3
Max supplied current
2.00 – 200.00 KA
TURNS TR.4
Transformer 4 turns ratio
1 – 200
I MAX TR.4
Max supplied current
2.00 – 200.00 KA
It is important to keep in mind that after having modified the following
parameters the memory of the TE700 control unit must always be reset.
INVERTER SIZE
Indicates the max current that the inverter can supply at output. If a wrong value is set, this
could damage the inverter and/or the welding transformer.
TA TURNS
Indicates the turns ratio of the current transducer installed inside the inverter. If a wrong value
is set, this could lead to a wrong adjustment of the welding current.
FREQUENCY
This parameter sets the frequency at which the power semiconductors are switched. This
control unit can work at 1000 Hz, 2000 Hz, 3000 Hz and 4000 Hz. The selected operating
frequency must be adapted to the welding transformer used otherwise it might be damaged. If
an operating frequency higher than 1000 Hz is selected, it will not be possible to activate the
thermal limit switches relevant to the welding transformer and/or the diodes. If the thermal
limit switches relevant to the welding transformer and/or the diodes were previously activated,
when a work frequency higher than 1000Hz is selected, the following message is displayed:
THERMAL LIMIT SW OFF
<+> OK <-> CANCEL
If key <-> is pressed, the previously set thermal limit switches will remain energized and the
operating frequency of the inverter remains at 1000 Hz. If key <+> is pressed, the thermal
limit switches relevant to diodes and welding transformer will be disabled automatically and
the operator will be able to use an inverter operating frequency higher than 1000 HZ.
CURRENT LOOP
This parameter allows the operator to choose which current transducer should be used in the
adjustment loop. If set to ROG, the Rogowsky coil installed on the secondary circuit of the
machine is used to adjust the current. If set to TA, a current sensor inside the inverter and
installed on the primary of the welding transformer is used for the adjustment.
The best performance of the current adjustment loop is achieved by selecting ROG and
installing the Rogowsky coil on the secondary circuit of the spot welder.
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