Entron EN1000 series

ENTRON Controls, LLC. • 700120S • Page 97
8.0 CONSTANT CURRENT OPERATION (EN1001 only)
SECONDARY PRESET-RANGE COMPENSATION or MONITORING Section 8.2.1
PRIMARY PRESET-RANGE COMPENSATION or MONITORING Section 8.2.2
SECONDARY AUTO-RANGE COMPENSATION or MONITORING Section 8.2.3
PRIMARY AUTO-RANGE COMPENSATION or MONITORING Section 8.2.4
To operate the control with CONSTANT CURRENT, it is necessary to be familiar with the
operation of the control in NON-CONSTANT CURRENT mode.
The function of the Current Compensation feature of the EN1001 Series Controls is that of
maintaining the welding current constant at the preset level, despite influencing factors which
could otherwise make the current vary. With the Current Compensation feature in operation,
the current remains substantially constant regardless of line voltage variations, changes in
machine power factor caused by movement of ferrous metal within the secondary, changes in
the size or shape of the secondary, changes in material resistance, or any combination of these
factors.
To operate the EN1001 Control in CURRENT COMPENSATION modes, the following steps
are necessary:
1. Set up sensor selection jumper according to selected Current Sensor (see Section 8.1).
2. Software parameter setup:
COMPENSATION parameters (see Section 8.2)
Transformer’s TURNS RATIO (
t.rt.r
t.rt.r
t.r
..
..
.)
CONSTANT CURRENT mode (
C.rC.r
C.rC.r
C.r
..
..
.)
RANGE (
rr
rr
r
.A..A.
.A..A.
.A.)
PROCESS OUTPUT parameter (
PP
PP
P
.O..O.
.O..O.
.O.) (see Section 8.3)
3. Program the weld schedules.
Step 1 and Step 2 are needed when control is initially installed or a new control mode is selected.
When using the EN1001 Control in CONSTANT CURRENT mode, both AUTOMATIC POWER
FACTOR and CONSTANT CURRENT function will compensate current. When the control
operates under poor power factor and low PERCENT CURRENT output situation, the MANUAL
POWER FACTOR should be set to 99% (
PP
PP
P
.P.P
.P.P
.P
..
..
.=
9999
9999
99) to obtain better performance (see Section
5.4.10).
The Current Compensation feature should not be expected to correct for electrode wear,
improper electrode size or force, or other problems caused by improper machine setup and
maintenance.
8.1 HARDWARE SETUP
The EN1001 Control can be operated with the following types of Current Sensors:
1. Primary Current Transformer
2. Secondary Rogowski Coil