The advantages of VPFW SSR over conventional SSR are summarized as
following table:
The advantages of VPFW SSR over conventional SSR are summarized as
following table:
Functions
VPFW SSR
VPFW SSR
Conventional SSR
Conventional SSR
Zero Cross Switching
Zero Cross Switching
Yes
Yes
Time Base
Time Base
Variable
Fixed
Proportional Timing Error
Proportional Timing Error
Control Achievement
Control Achievement
Half on Cycles
Half on Cycles
DC Load Current
DC Load Current
Harmonic Current
Harmonic Current
Stress on the Load
Stress on the Load
Load ( Heater ) Life
Load ( Heater ) Life
Even
Zero
±0.1%
Excellent
Low
Low
Longer
±1% ( for 1 sec.
cycle time )
±1% ( for 1 sec.
cycle time )
Good
Even and Odd
Even and Odd
Nonzero
Higher
Higher
Shorter
Table 5.1
Table 5.1
Function Comparison between
Conventional SSR and VPFW SSR
Function Comparison between
Conventional SSR and VPFW SSR
Output 1 and output 2 of the ETR-8300 can be connected to VPFW SSR
directly provided that a pulsed voltage drive output (ETR-8300-XX2XXXX or
ETR-8300-XXX2XXX ) is ordered.
Output 1 and output 2 of the ETR-8300 can be connected to VPFW SSR
directly provided that a pulsed voltage drive output (ETR-8300-XX2XXXX or
ETR-8300-XXX2XXX ) is ordered.
Here is an example:
Here is an example:
ETR-8300-XX22XXX
ETR-8300-XX22XXX
OUT1=REVR
O1TY=SSRD
CYC1=1.0 (sec )
OUT2=COOL
O2TY=SSRD
CYC2=1.0 (SEC )
OUT1=REVR
O1TY=SSRD
CYC1=1.0 (sec )
OUT2=COOL
O2TY=SSRD
CYC2=1.0 (SEC )
Figure 5.4
Figure 5.4
VPFW SSR Application Example
VPFW SSR Application Example
+
+
_
_
VPFW SSR
VPFW SSR
AC Power
AC Power
Three phase VPFW SSR's are also available upon request.
Three phase VPFW SSR's are also available upon request.
85
ETR-8300
Out1 Out2
Alm1 Alm2