HP Modular Cooling System manual Electrical planning around water handling components

Electrical planning around water handling components

Because of the potential of forming condensate on non-insulated water connections or leaking water connections around water-based cooling systems, a few issues must be considered during the electrical planning:

•Water-proofed connectors

•Watertight conduits for cables

•Leak detection systems

Warning:

If water comes in contact with power cables, before cleaning up water in this area, shut down the main breaker.

To identify water-proofed connectors, HP recommends looking at the IP-rating of the connector, based on the international standard IEC 60529. Additionally, HP recommends a connector that is at least rated IP 67.

Cable conduits are available in different styles depending on flexibility and materials. The common materials are plastic, metal, nylon or mostly a composition of these materials. Watertight conduits are available in both ways flexible or hard material, depending on the application.

A leak detection system for data center usually uses leak sensor cables, which are installed on the sub- floor in a raised floor and connected to a facility management system.

Connecting to facility AC power

The MCS 5042 accepts AC power through two Walther Procon A5 series power receptacles located at the top rear patch panel. The MCS 5042 ships with two sets of AC power cords for connecting to redundant AC power busses, if available. Figure 17 shows the two types of power cords that ship with the MCS 5042. The NEMA L6-20 power cord uses a NEMA L6-20 male plug for connecting to a facility AC feed connector common to North America and Japan. The IEC 309 power cord uses an IEC 309 male plug for connecting to a facility AC feed connector common in various international regions.

Figure 17: MCS 5042 power cords

NEMA L6-20-to-Procon-A5 Power Cord IEC 309-to-Procon-A5 Power Cord

At least one power cord must be used for operation of the MCS 5042. To improve system availability, the second cord can be connected to a redundant AC power bus. When the redundant power is connected, the transfer switch assembly of the MCS 5042 provides switch-over to the active power bus in the event of power source failures or accidentally tripped circuit breakers.

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