MT5 Multi-Tracer Operating Manual
page 8
3.1.1. Mounting
Mount the MT5 Controller and Load units in standard 19-inch equipment rack or on a
stable surface. Each controller and load requires AC power and each load must connect
to the controller with a load control cable. See Appendix E - Specifications, for detailed
power requirements.
The load unit dissipates energy as warm air. Fans are mounted on the bottom of the
load unit. Make sure the airflow is not blocked. See the discussion of ventilation below
for more details. The cooling fans are relatively noisy when running at full power (up to
86 dB). Therefore, consider fan noise when locating the system.
3.1.2. AC Power
Both the MT5 Controller and Load units require AC power. Raydec strongly
recommends powering the MT5 Controller and Load units through an uninterruptible
power supply (UPS). The MT5 System includes an internal computer and, as with any
computer, clean and stable power helps to ensure trouble-free operation. In addition to
helping to prevent system damage, a UPS also reduces the possibility of losing data.
Each load unit requires an external electrical ground. Although the AC power cord
connects the Load unit chassis to AC power ground, this ground connection cannot
handle the potential worst-case ground-fault currents from the connected PV modules.
Therefore, additional grounding is used to ensure safe operation of the unit under worst-
case conditions. Figure 1, shows the grounding lug mounted on the MT5 Load units.
This lug accommodates wires from #4 to 1/0 AWG.
