12 • Recommended Wiring Scheme
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4. RECOMMENDED WIRING SCHEME
4.1 Load connection schemes
Notes:
(1) – Set connection type to TPS. Refer to section 7.7.1 on page 28
(2) When load is connected in WYE NEUTRAL NOT CONNECTED or in LINE DELTA (both
connections are without a neutral point) AND TPS is in PHASE CONTROL it is impossible
to go to zero output.
Minimum possible firing for such case gives 10-20% of output voltage. This is since in this
case the firing of each phase depends on the three phases mains and we cannot control
each phase voltage down to zero.
In this case, zero input in analogue input causes the minimum possible voltage to appear
in the output. Then, upon increasing the analogue input voltage, output voltage/current is
monotonically increased.
(3) WYE, NEUTRAL NOT CONNECTED (NC) applicable for symmetrical loads only.
Connecting to non symmetrical loads might damage the load!
(4) When WYE, NEUTRAL NOT CONNECTED (NC) applies set the UNBALANCE protection
to the lowest practical value and trip the TPS upon UNBALANCE or else load will damage.
Refer to section
7.7.3 on page 32.
(5) Refer to section
4.2 next page for INSIDE DELTA wiring instructions.
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General Specifications
