Saftronics SH6 Series, Manual, Page: 3 / 24

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SH6- HEATER CONTROLLER SERIES
1. DESCRIPTION
1.1 FEATURES
Saftronics Heater Controller SH6 series are solid state,
variable voltage controllers for three phase resistance or
primary transformer controller banks.
They provide 2 methods of controlling:
A.
VOLTAGE RAMP MODE
B. VARIABLE VOLTAGE CONTROL
Each controller contains 6 x SCR's in the power circuit. The
power circuit is controlled by means of a Saftronics PC550
series control card.
Saftronics solid-state controllers are constructed in a manner,
which permits rapid removal, and replacement of PC boards,
SCR's, control fuses, etc. This ensures minimum downtime in
the unlikely event of failure of one of these devices.
In the case of loss, or insufficient cooling air resulting in
overheating of the heat sink, a thermal switch will open and
shut down the controller thereby protecting the SCR's from
excessive heating.
1.2 CONFIGURATION
The SH6 range of heater controllers covers power ratings from
69Kw to 730Kw with 380V or 525V supplies as standard.
Larger powers and different voltages are available on request.