IONPURE
®
DC POWER CONTROLLER
– IP-POWER600-G2
IP-POWER600-G2 MAN REV. 11
Page 8 of 28
The secondary of the transformer MUST NOT be connected to earth
ground. Grounding both the secondary and the GND terminal will damage
the power controller.
2.2.2
Over-current Protection
The power controller does not have built-in fuses for the AC input. Over-
current protection devices, such as circuit breakers or fuses, must be
installed between the isolation transformer and the AC input terminals, for
example as shown in Figure 3.
SELECT “VERY FAST ACTING” FUSES OR A CIRCUIT BREAKER WITH A
FAST TRIPPING CURVE.
If the maximum DC output current of the power controller will be limited to 13.2 amps, a
current rating of 20 amps for the over-current protection devices is recommended. If the
power controller will be limited to a DC current of less than 13.2 amps, size over-current
protection devices according to Table 3: Isolation Transformer Size and Secondary Voltages
for a Single Power Controller, located in Appendix A.
Over-current protection devices must also be installed on the primary of the isolation
transformer and sized correctly according to applicable local electrical codes.
Do NOT install fuses, circuit breakers or any type of switching device
between the DC output of the power controller and the CEDI module.
Doing so might eventually cause damage to the power controller.
Schematics of typical single and multiple module installations are located in Appendix C.
2.2.3
Electrical Surge Suppression
Inductive elements in a circuit can generate harmful voltage spikes when a switch, contactor
or breaker opens and cuts the current flow abruptly. Snubbers are simple energy absorbing
circuits used to suppress those spikes.
Although the G2 power controller’s input section is protected by an MOV (metal oxide
varistor), a snubber should be installed whenever the power controller is fed with 660
Volts or at sites with poor electric power quality indicated by swells, over-voltages,
surges, etc.
Snubbers are most effective when installed on the secondary of the transformer, between any
switching devices and the power controller. Schematics showing their ideal location are found
in Appendix C.
Ionpure® offers snubber circuits, model numbers IP-SNUBCIRC-1PH and IP-SNUBCIRC-
3PH. The 3-phase version is only suitable for installation on the primary side of the isolation
