DS8000 Service Documentation Version 7.5

Checking customer voltage with customer CB on (wired)

Procedure

Remove the lockout tag and/or device that was applied to each customer mainline AC voltage circuit breaker, then switch on the customer circuit breaker.
Prepare the multimeter to read line voltage AC.
DANGER
Dangerous voltages may be present. Do not touch the internal parts (pins and connectors) of the customer receptacle.
Measure the voltage between the ground pin and each voltage pin (for three phase A , B , and C or for single phase A and B ) on each mainline power cable. Refer to Figure 1 or Figure 2.
Are the voltages within 10% of each other?
- Yes, continue with the next step.
- No, inform the customer that the voltages are not correct. Do not continue until the voltages are correct.
Figure 1. Three-phase delta mainline power connector at DC-UPS end

Figure 2. Single phase mainline power connector
Locate the agency label situated on the inside front left wall of the rack, halfway from the top (near the front of PPS E2). See Figure Figure 3. The label will include the voltage, current, and phase specifications for this model. Measure the voltage between each pair of voltage pins (for three phase A to B , B to C , and C to A ; or for single phase A to B ) on each mainline power cable. Refer to Figure 1 or Figure 2. Verify that the customer AC input voltage that you just measured matches the machine input voltage information on the label.
Does the voltage measured match the voltage on the DS8000® information label?
- Yes, continue with Connecting the mainline power cables on the racks (wired).
- No, do not continue with the installation. Contact the marketing representative to confirm that the DS8000 was ordered with the correct power input feature.
Figure 3. Agency label example (2421-941, 3-phase), with location