深圳市宏宇达数控技术有限公司
地址：深圳市南山区中山园路 1001 号 E4-6C(TCL 国际 E 城) TEL：755-26625800 FAX：755-26729960
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3.6.1
、
Voltage Divide info
Arc voltage THC must monitor the plasma’s arc voltage change. Usually the arc voltage is
higher than 100V during cutting, and it has strong interference when arc start, so it must use
the voltage divider with 50:1… before leading into THC.
XPTHC-4 is with none Isolation voltage divider, inside the THC with 1:1 isolation.
Voltage divider see Fig 3-7 shows.
Fig 3-7, None Isolation voltage divider
As None Isolation Voltage Divide is directly connected with Plasma Power Supply, to enable
THC escape from interference caused by the HF during Plasma Arc Start, the Divided Arc
Voltage guided into THC is Time-Delayed. It just needs to prolong the time of lead Arc Voltage
into THC, this interference can be avoid effectively
On XPTHC-4, the delay lead in arc volt into THC is set by P2 parameter on the operation
panel.
3.6.2
、
Using the Plasma’s 50:1 voltage divider solution:
Many plasma has its own 50:1 etc. voltage divider. We only provide the 50:1 volt divide’s
method.
Please do it as Fig 3-8 shows:
Fig 3-8:
Using the Plasma’s 50:1 voltage divider solution
According to Fig 3-8 shows, only need to do with these three Resistors then could
use the plasma’s own voltage divider output.
50:1 volt
“
-
”
50:1 volt
“
+
”
PLASMA
Start1,start2
Short circuit this
“R”
Cut off this “R”
Cut off this “R”
