
63
80963B_MSW_GFW_11-2012_ENG
DELAy TRIGGERING
In firing modes ZC and BF, with inductive loads, this function inserts delay triggering in the first cycle.
The delay is expressed in degrees settable in parameter dL.t, from 0 to 90 degrees. The function is enabled with parameter
Hd.5 (+32).
The function activates automatically if there are OFF conditions for a time exceeding the one settable in dL.oF (if =0 the fun-
ction is as if disabled).
◊
Optimised Delay-Triggering value for transformer: 60°
◊
Optimised Delay-Triggering value for 3-phase transformer: 90°, 90°, 60°
708*
DL.T
R/W
Delay triggering
(first trigger only)
738*
DL.oF
R/W
Minimum non-conduction time to
reactivate delay triggering
NB
: In case of a 3-phase load, you can set a different value from parameter PS.tA for each zone (ex. to control an unbalanced 3-phase load).
SOFTSTART or START RAMP
This type of start can be enabled either in phase control or pulse train mode and acts via control of the conduction
angle. It is enabled with parameter Hd.5.
The softstart ramp starts from a zero conduction angle and reaches the angle set in parameter PS.HI in the time set
in parameter PS.tm, from 0.1 to 60.0 sec.
With parameter Hd.5 (+64), you can configure a linear softstart in power, i.e., starting from zero you reach the power
value corresponding to the maximum conduction angle set in PS.HI. Softstart ends before the set time if power reaches the
corresponding value set in manual control or calculated by PID.
Control of maximum peak current can be enabled with parameter Hd.5 during the ramp phase; peak value is settable
in parameter PS.tA. This function is useful in case of short circuit on the load of loads with high temperature coefficients to
automatically adjust start time to the load.
The softstart ramp activates at the first start after power-ON and after a software reboot. It can be reactivated via
software control by writing bit 108 or automatically if there are OFF conditions for a time exceeding the one settable in PS.oF
(if =0 the function is as if disabled).
The ramp can also be enabled with parameter Hd.5 (+256) after a software shutdown, i.e., zero is reached in the set
time from delivered power.
630*
PS.xI
R/W
maximum phase of phase softstart ramp
705*
R/W
Duration of phase softstart ramp
629*
PS.of
R/W
Minimum non-conduction time to reacti-
vate phase softstart ramp
706*
PS.ta
R/W
Maximum peak current limit during
phase softstart ramp
108*
bit
OFF = Restart not enabled
ON = Restart enabled
R/W
Restart of phase
softstart ramp
NB
: In case of a 3-phase load, you can set a different value from
parameter FU.tA for each zone (ex. to control an unbalanced 3-phase
load).
707*
FU.tA
R/W
Max. limit of RMS current in normal op
0,0 ...999,9 A
704*
bF.Cy
R/W
Min. number of cycles in BF mode
1 ...10
Model
40A
60A 100A 150A 200A 250A
Default zone 1...3 40,0 60,0 100,0 150,0 200,0 250,0
PS.tn R
0.0 ...100,0 %
0.1 ...60,0 s
0 ...999 s
0.0 ...999,9 A
100,0
zone1
100,0
zone2
100,0
zone3
10,0
zone1
10,0
zone2
10,0
zone3
2
zone1
2
zone2
2
zone3
106*
bit
State of phase
softstart ramp
R
OFF = Ramp not active
ON = Ramp active
107*
bit
State of phase
softstart ramp
R
OFF = Ramp not ended
ON = Ramp ended
0 ... 90 °
0 ... 10000ms
60
zone1
60
zone2
60
zone3
10
zone1
10
zone2
10
zone3
Model
40A
60A
100A 150A 200A
250A
Default zone 1...3
110,0 170,0 280,0 420,0 560,0 700,0
1
zone1
1
zone2
1
zone3
DIP 5 = OFF (Resistive load)
5
zone1
5
zone2
5
zone3
DIP 5 = ON (Inductive load)