PMA-Relay S 3PH
from 60A to 210A
Important warnings for safety
5
WARNING!
The power controller’s protection rating is IP20 with all covers installed and closed. It must
be installed in an enclosure that provides all the necessary additional protections appropriate for the
environment and application.
WARNING!
Ground the power controller via the provided protective earth grounding terminal. Verify
ground is within impedance specifications. This should be verified periodically.
WARNING!
Electric Shock Hazard: when the power controller has been energized, after shutting off the
power, wait at least one minute for internal capacitors to discharge before commencing work that brings
you in to contact with power connections or internal components.
WARNING!
The installation must be protected by electromagnetic circuit breakers or by fuses. The
semiconductor fuses located inside the power controller are classified for UL as supplementary
protection for semiconductor devices. They are not approved for branch circuit protection.
WARNING!
When making live voltage or current measurements, use proper personal protective
equipment for the voltages and arc-flash potentials involved.
WARNING!
Verify the voltage and current ratings of the power controller are correct for the application.
CAUTION:
To avoid compromising the insulation, do not bend wire or other components beyond their
bend radius specifications.
CAUTION:
Protect the power controller from high temperature, humidity and vibrations.
CAUTION:
The power controller warranty is void if the tested and approved fuses are not used.
CAUTION:
Only trained and authorized personnel should access and handle the internal electronics and
they must follow proper electro-static prevention procedures.
CAUTION:
Install an appropriately sized RC filter across contactor coils, relays and other inductive
loads.
CAUTION:
The thyristor units here described have been designed for use with sinusoidal networks with
nominal frequency 50-60 Hz. Any application with NON-SINUSOIDAL, distorted or disturbed networks
could compromise the correct operation of the unit.
NOTE:
Provide a local disconnect to isolate the power controller for servicing.
NOTE:
The nominal current is specified for ambient temperatures at or below 40° C. Ensure the application
design allows for adequate cooling of each power controller. The power controller must be mounted
vertically. The cooling design must prevent air heated by one power controller from causing power
controllers mounted above to exceed the ambient operating temperature limit. When power controllers
are mounted side by side allow a minimum spacing of 15mm between them.
NOTE:
Use only copper cables and wires rated for use at 75°C or greater.
