Introduction & Features
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Verify that the HVAC system is not on a timer that can shut off on weekends or
holidays.
What procedures are in place to protect the equipment when the HVAC system fails?
Power Conditioning
It is good practice to operate an on-air TSS-2470 Time Delay from an Uninterruptible Power
Source, or UPS. All utility power systems experience occasional transient events, including
brownouts and dropouts, which are capable of taking the TSS-2470 Time Delay off the air. It
is the station operator’s job to plan for and overcome such contingencies.
UPS units suitable for smoothing short-term power line problems come in two varieties:
Change-over UPS Design
This design senses drop-outs and low line voltage, and switches its output to an internal
inverter operating from a battery. This UPS is low in cost, and is most often used in non-
critical applications such as desk-top computers. A disadvantage is that it may create its own
power transients when switching between utility power and its inverter supply. For this reason
360 Systems does not recommend this type for use with the TSS-2470 Time Delay.
Continuous Conversion UPS Design
This improved design continuously converts utility power to DC, stores it in a battery, then
produces isolated AC power from an inverter. It never switches, and is immune to input
transients, brownouts, and blackouts. Models are available with batteries of almost any size,
making the continuous-conversion UPS suitable for transient suppression or long-term
operating power in the absence of utility power.
Recommended UPS Models
There are several manufactures of continuous conversion UPS systems are suitable for use
with 360 Systems’ video products. APC and Eaton/Powerware Corporation are two of the
most common.
UPS’s are available in several different configurations to accommodate various current load
and power failure support times.
