Sheet 2
ITM-0157-ED1
General description
Installation
Control and protection unit for two pumps
•
with automatic alternation by 4-20 mA
external level sensor.
Three/single phase. Dual power supply
•
230/400 Vac.
Pumps starting & stopping in a cascade
•
sequence.
Automatic pump alternation in case of failure
•
or deactivation of one of them.
Overload electronic relay and pahse failure.
•
Main switch-disconnector.
•
Magnetothermics.
•
24 Vac contactors remote circuit isolated
•
from mains power supply transformer.
Remote circuit double protection in primary
•
and secundary transformer.
HAND-OFF-AUTO push buttons for each
•
pump.
Voltage and high level pilot lights.
•
ON/OFF and OVERLOAD for each pump.
•
Selectable operation mode (simoltaneous or
•
deferred stop).
Redundant entry for high level fl oat
•
(protected up 400 V).
Inputs for klixon motor temperature switch.
•
Level auto-scaled.
•
Selectable jammed impeller protection
•
system.
General alarm (pumps thermal failure, high
•
level or sensor failure) and external siren
output relays.
24 Vdc controls for more security.
•
3 Digits led may display level or aditional
•
information.
Alarm buzzer incorporated.
•
Mounted on a wall.
Before opening the unit, the main switch
must be in “OFF” position.
