Secure Cabinet With kVA Power - Architecture and Power

A standard Secure Cabinet includes integrated redundant power circuits that offer high availability for your critical network needs and distributed computing workload. Power circuits are selected to support your power requirements — these circuits offer site power density for a range of power loads to meet your needs, and ensure that the loads are sufficiently supported.

Conditioned AC power is delivered to the cabinet via an AC power circuit.

Conditioned DC power is delivered to the cabinet via a DC power circuit.

Note: The available voltage and amperage vary by country.

You can contract for a single (primary) circuit, but for infrastructure resiliency, we encourage you to use a pair of redundant power circuits. A redundant power circuit pair is:

• A matching pair of circuits (in both voltage and amperage)

• Fed by diverse UPS systems

You have the option to spread the power load across both circuits in the redundant power circuit pair, but the load must not exceed the capacity of a single circuit. This ensures that a single circuit can carry the full load in case of a circuit failure.

The type of socket or receptacle used for each circuit is country-specific, voltage-specific, and amperage-specific. It is installed either above the cabinet or, in some raised floor IBX data centers, under the floor beneath the cabinet.

The maximum allowable draw on any one circuit equals the Circuit-Usable kVA, which varies by region:

Region	Maximum Allowable Draw (in amps)
APAC	100% of the size of the circuit
EMEA	100% of the size of the circuit
AMER	80% of the size of the circuit (for 120/208V circuits) 100% of the size of the circuit (for 240/415V circuits)

Draw Caps

Every Secure Cabinet With kVA-Based Power has a power draw cap, measured in kVA. A draw cap is the maximum power draw supportable by (and contractually allowable for) a secure cabinet.

Note: The draw cap does not place a limit on the number of power circuits that can be installed.

For customers that require both AC and DC power, the draw cap must be split between AC and DC power draw.

Example: A 5 kVA draw cap can be split into 4 kVA of AC power and 1 kVA of DC power.

The draw cap is split into AC Power kVA and DC Power kVA based on your expected AC and DC power draw in the cabinet. AC Power kVA plus DC Power kVA must exactly equal the draw cap.

If you order more than one secure cabinet in an IBX, those cabinets may or may not be installed in the same secure area. Multiple secure cabinets installed in the same secure area are assigned an aggregate draw cap.

Important: The total installed capacity of all primary circuits should not exceed twice the draw cap.

Cabinet Ratings

Every secure cabinet has a Cabinet Rating equal to the maximum power draw allowable in the cabinet (per the Global IBX Policies). The rating is also an indication of the cooling resources necessary to support the cabinet.

Multiple secure cabinets in one IBX or in one secure area may have different Cabinet Ratings. The sum of the Cabinet Ratings of all cabinets installed in the same secure area must be less than or equal to the aggregate draw cap.

Note: The cabinet rating does not place a limit on the number of power circuits that can be installed in the cabinet.

A Cabinet Equivalent, or CabE, is a unit of measure equal to the total cage space needed to support one secure cabinet (and its associated hot and cold aisle space). For example, a 10 CabE space can support 10 secure cabinets.

The Average CabE Rating is used to determine the overall power density of a set of secure cabinets. The Average CabE Rating is equal to the quotient of the draw cap (in kVA) divided by the quantity of secure cabinets installed in one secure area.

Example: Suppose you license two secure cabinets in a single secure area; one cabinet has a Cabinet Rating of 4 kVA and the other has a Cabinet Rating of 5 kVA. The aggregate draw cap for these two secure cabinets is 9 kVA (4 kVA + 5 kVA = 9 kVA). The Average CabE Rating is 4.5 kVA (9 kVA ÷ 2 cabinets = 4.5 kVA).