 |
Personal injury or death can result from high voltage. When power generation equipment must be in operation to make tests and/or adjustments, high voltage and current are present. Improper test equipment can fail and present a high voltage shock hazard to its user. Use electrical safety gloves when you are working in the cabinets. Make sure the testing equipment is designed for and correctly operated for high voltage and current tests being made. |
 |
Calibration Error Limits
| Parameter | Nominal Target | Percent Deviation |
| Output Current, Pre Transformer O/P Current full scale | 1400 A | ± 1.0 |
Note: The system should be in Bypass mode.
- Connect a PC to the UPS.
Refer to Systems Operation, Testing and Adjusting, RENR7654, "Personal Computer to UPS Connection".
- Place system in Bypass mode.
Refer to Systems Operation, Testing and Adjusting, RENR7654, "Transfer to Bypass Mode".
Note: Before proceeding, if this is a Paralleled MMU system, calibrate the MMU Currents from the Parallel Control cabinet (PCC).
- Select "AC Output Currents".
Note: 4-Wire menu options only appear in 4-Wire systems.
- Select "Use Defaults".
- Place probe clamp on the K5 bus bar for Phase A.
- Take reading from the K5 bus bar for Phase A.
 | |
| Illustration 1 | g01307126 |
Current Probe Clamp | |
Note: Clamp should be rated at a 3000 amp maximum, 10 Hz to 100 kHz. The clamp should be set to 0.1 millivolts per amp.
 | |
| Illustration 2 | g01298917 |
(1) Ground (2) Phase C Output Bus Bar (3) Phase B Output Bus Bar (4) Phase A Output Bus Bar (5) Output Breaker K5 (Optional) (6) Input Breaker K1 (7) Phase A Input Bus Bar (8) Phase B Input Bus Bar (9) Phase C Input Bus Bar (10) Left Component Panel | |
 | |
| Illustration 3 | g01307130 |
Probe Clamp Range and Output | |
- Enter reading into "Calibration Point".
- Select "OK".
- Move the clamp to the K5 bus bar for Phase B.
- Take a reading.
- Enter the value for Phase B that is shown on multimeter in the "Enter Calibration Point" window.
- Select "OK".
 | |
| Illustration 4 | g01307177 |
Output Current Entered for Phase B | |
- Move clamp to the K5 bus bar for Phase C.
- Take a reading.
- Enter the value for Phase C that is shown on multimeter in "Enter Calibration Point" window.
- Select "OK".
 | |
| Illustration 5 | g01307178 |
Output Current Entered for Phase C | |
- Select "View Status".
- Select "Save".
 | |
| Illustration 6 | g01307179 |
Phase A, Phase B, and Phase C Output Current Calibration Status | |
The AC Output Current calibration is complete.