13
THE HD (Heavy Duty) TERMINAL
The E30 contains a solid-state switch (HD Heavy Duty drive) that can be
used to protect the contacts of Relay 1 by eliminating the destructive arcing
caused by the starting and stopping of motors. The solid-state switch is
accessible from the HD terminal on the terminal block. We recommend the
HD drive be used whenever the E30 is used to directly control a single
phase motor. The HD drive should not be used when the E30 is connected
to a contactor, external timer, low wattage relay or to any other external
device where voltage free contacts are required. It is strictly intended for
the direct control of highly inductive AC motor loads. The HD terminal and
the E30’s built in relays must never be directly connected to a DC motor
under any circumstances.
When the HD terminal is linked to the normally open terminal of Relay 1,
the HD drive in effect parallels a 42 Amp solid state switch across the
relay’s normally open contacts. This increases the momentary current
carrying capacity of the relay’s contacts to well over 60 Amps. The solid-
state HD drive is only activated for a brief period when the motor starts and
stops. It effectively handles the high inrush current associated with the
motor starting, and it provides a current path for the destructive back EMF
associated with the motor stopping.
To use the HD drive, place a heavy
link wire between the HD terminal and the Normally Open terminal of
Relay one.
The HD terminal must be left unused or only ever linked to Relay
1 Normally Open. It must never be used for any other purpose
and it must never be connected to any external device. Under no
circumstances connect the HD terminal to the terminals of Relay
2. The HD terminal must be regarded as live at all times and at
full mains potential.
WARNING
Summary of Contents for E30
Page 11: ...11 74mm 60mm 4 X 6mm Holes TOP WALL BRACKET DRILL PATTERN...
Page 19: ...19 WIRING DIAGRAMS PLUG PLAY CONNECTIONS CONNECTIONS FOR A SINGLE PHASE PUMP...
Page 20: ...20 LOW VOLTAGE AC SUPPLY WITH REMOTE INPUT CONNECT AN EXTERNAL ALARM...
Page 21: ...21 TWO SINGLE PHASE PUMPS WITH A REMOTE INPUT LOW VOLTAGE DC SUPPLY REMOTE INPUT...
