User Service Guide, Fifth Edition - HP Integrity rx8640 SEU

NOTE: These procedures must be performed for each power cord that will be plugged directly

into the back of the SEU. If the expected results from this procedure are not observed during the

voltage check, refer to the next section titled “Voltage Check (Additional Procedure).”

Voltage Range Verification of Receptacle

This measures the voltage between L1 and L2, L1 to ground, and L2 to ground. Three separate

measurements are performed during this procedure. Refer to Figure 3-19 for voltage reference

points when performing the following measurements.

Figure 3-19 Voltage Reference Points for IEC 320 C19 Plug

IMPORTANT: These measurements must be performed for every power cord that plugs into

the SEU.

1. Measure the voltage between L1 and L2. This is considered to be a phase-to-phase

measurement in North America. In Europe and certain parts of Asia-Pacific, this measurement

is referred to as a phase-to-neutral measurement. The expected voltage measured should

be between 200–240V AC regardless of the geographic region.

2. Measure the voltage between L1 and ground. In North America, verify this voltage is between

100–120V AC. In Europe and certain parts of Asia-Pacific, verify this voltage is between

200–240V AC.

3. Measure the voltage between L2 and ground. In North America, verify this voltage is between

100–120V AC. In Europe and certain parts of Asia-Pacific, verify this voltage is 0 (zero) V

AC.

Table 3-2 provides single phase voltage measurement examples dependent on the geographic

region where these measurements are taken.

Table 3-2 Single Phase Voltage Examples

Europe

North AmericaJapan

230V208V or 240V210VL1-L2

230V120V105VL1-GND

0V120V105VL2-GND

1 In some European countries there might not be a polarization.

58 Installing the Server Expansion Unit