Owner`s manual

The output of this current transformer is clamped to a maximum of +/-1.1V by means of back-to-back diodes, which
is in parallel with a high value burden resistor. This signal is supplied to the “Controller”. If back-feed current should
be detected when the inverter is operating, the system will be shut down, that is, latched OFF. Reset us accom-
plished by cycling the system OFF ON/ switch on the LCD display panel. Current transformers are connected to
the “back plain” via an eight-pin connector. Four of these pins are used as interlock connections, which will prevent
the inverter from operating if the current transformers are not connected.
Owner’s Manual
Theory of Operation page 4 — 15