INNOVATIVE CIRCUIT TECHNOLOGY ICT 100A Manual

ICT 100A REDUNDANT ISOLATION MODULE
The ICT 100A Redundant Isolation Module connects two
power supplies in parallel to create a redundant 12, 24,
or 48V power system for critical loads. Under normal
operation low loss electronically controlled solid state
switches connect each supply to the output so they can
share the load of up to 100A equally. If the voltage on
one of the supplies falls below the output level due to a
failure or other reason, the switch on that input will
immediately open to ensure the failed supply cannot pull
down the output of the good supply. The higher voltage
supply will then fully power the load without
interruption.
The solid state MOSFET devices used in the Isolation
Module have a much lower voltage drop and resulting
heat dissipation than seen in a conventional diode based
unit. This enables the module to run much cooler, with
the load experiencing a minimal drop in the supply
voltage.
WARNINGS
Risk of personal injury or damage to equipment and
property! Always observe the following:
•
Install and operate unit in a Restricted Access
location, such as an enclosed equipment rack
•
Ensure the RETURN lead on the module is connected
to the power supply common negative terminal
•
Use an appropriate dc over-current protection device
in line with any battery used as one of the dc sources
•
Use wire and connectors rated for the maximum
load current
•
Ensure supply polarity is correct before connecting
•
Ensure required load current does not exceed the
maximum 100A rating of unit
•
Ensure the input voltage does not exceed the
maximum 65V rating of the unit
INSTALLATION
Procure and install two redundant power supplies (with
the same output rating, ≤100A, ≤65V) in an equipment
rack or other suitable location according to their
installation instructions. Set each output to the voltage
required by the critical load, then switch off input power.
Mount the ICT100-RIM module inputs directly on the
Positive (+) Output bus bars of two matching ICT Digital
series, Platinum Series, or Pro Series dc power supplies,
by placing the ¼-20 input studs through the power supply
output bus bar holes, and then securing tightly using the
nuts and lock washers provided. (as shown below)
Common Negative
Terminal
Positive Output
Connect the power supply Negative terminals together
with a conductor rated for the full output load current,
installing the module Negative RETURN lead ring tongue
under one of the fastening bolts, as shown above. (Use
the ICT-PAR high current paralleling strap from ICT to
simplify connecting bus bar outputs together on ICT
Digital Series and Pro series power supplies, as shown)
Note: When using back-up batteries with your supplies a
battery must be independently connected to the +BAT
terminal on each unit, with a common connection to the
supply Negative terminals only. Do not tie the power
supply +BAT input terminals together with a single
battery, as this will defeat the isolation function of the
ICT100-RIM device.
WARNING
Risk of personal injury or damage to equipment and
property! Always observe the following:
When using batteries or other high current device as an
input power source you must install an inline fuse or
circuit breaker rated for 100A or less, between the supply
and the module input. This is required to limit the
maximum fault current through the module to a safe
level if the critical load input is shorted.
Connect the critical load to the module + OUTPUT stud,
and to the common Negative terminal of the power
supplies using appropriately rated wire and ring
terminals. Slip the output load cable through the terminal
boot (included) before connecting it to the +OUTPUT
stud. Position the boot to help insulate the connection
after tightening the nut on the output terminal.
Note: When using the unit with other models of power
supplies the ICT100-RIM should be mounted directly to a
flat surface such as a rack shelf using the 3 mounting tabs
on the module. (Mounting hardware not provided) Make
- RETURN
power connections to the dual inputs and output using
sense Lead
suitably rated wire terminated with ring lugs sized to fit
the ¼-20 gauge studs on the module.
CONNECTION DIAGRAM
Note: For -48V (positive ground) applications ensure the
ground connection is made on the load side of the
Isolation Module only. Otherwise the isolation function
may be bypassed by a ground connection on both the
input and the output.