Pixsys AT R 227-10ABC, User Manual

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14 - ATR227 - User manual
t
Load voltage
TF
0
TM
TNF
t
TF
0
TM
TNF
t
TF
0
TM
TNF
50% power TF = TNF
25% power TNF = 3 TF
0
75% power TF = 3 TNF
At 50% power, the modulation time is 40ms:
• 1 firing cycle (20ms at 50Hz)
• 1 firing cycle (20ms at 50Hz)
For a setpoint less than 50%
:
• The firing time remains constant (1 cycle)
• The non-firing and modulation time
increases
For a setpoint greater than 50%:
• The non-firing time remains constant (1
cycle)
• The firing and modulation time increases.
A.bt.F.
Advanced Burst fire control
In order to minimise power fluctuation during the modulation period, the “advanced
Burst fire” SSR output firing mode uses:
· A complete number of cycles for firing
· A complete number of half-cycles for non-firing
Load
voltage
t
TF
TM
TNF
t
TF
0
TM
TNF
0
Standard Single-Cycle (1 cycle Burst-firing)
Advanced Single-cycle Load
voltage
For a percentage less than 66%, SSR output
firing takes place as in the “Burst fire” mode
(see
bSt.F.
)
For a setpoint greater than 66% in “Advanced
Burst fire” mode:
· The non-firing time is constant at one
half-cycle
· Firing takes place over whole cycles.
In a ‘short-wave infrared’ application,
‘advanced Burst fire’ firing mode reduces the
brightness of the infrared elements and thus
minimises annoying visual flickering.
In a short-wave infrared application, “advanced Burst fire” firing mode reduces the
brightness of the infrared elements and thus minimises annoying visual flickering.
PHs.A.
Phase angle control
If this mode is active, the regulation is done through the phase choking
25% Power
50% Power
75% Power
100% Power
Using a no zero-crossing SSR, the ATR227
synchronizes with the power supply volage
(necessarily AC) and determines when
to activate the output to create the right
choking.