UPS Maintenance
Avoids surprises and guarantees uninterrupted operations
Preventive maintenance allows the equipment to work in optimal operating conditions, helps the equipment to extend its useful life to the maximum, eliminates energy problems, allowing your company to work continuously and without interruptions, while allowing you to schedule a predictive service that optimizes the operation of the equipment.
Scope of Preventive Maintenance
MAIN POINTS TO CHECK IN AN UPS
– General cleaning of the S.F.I.
– Review of visual indicators (local and remote)
– Review of meters, comparing with voltmeter – digital and frequency meter.
– Operational review of the systems.
– General internal review.
– Revision of the battery bank.
– Report will be submitted with pertinent observations
Work consisting of
a) Remote panel signaling
b) Capacitares seal
c) Power connections
d) Accuracy of meters
e) Fans and alarms
f) Emergency shutdown operation
g) Record at room temperature
h) Event history review
i) Review of the presence of alarms
a) Surface and connector cleaning
b) Torque applied to intercell connectors
c) Individual voltage
d) Ocular inspection of batteries (leaks, bulging, corrosion, etc.).
a) Input voltage
b) Consumption
c) Output voltage
d) Output current
e) Verify adjustment of the rectifier current limitation.
a) Measurement of the maximum discharge current
b) Individual load test
c) Type of cell and manufacturer
d) Measurement of the maximum DC output current
e) Determination of time from recharge to full charge
a) Consumption current
b) Input voltage
c) Check DC and AC capacitor alarms.
d) Measurement of peak-peak values of square waves
a) Standby AC line input voltage
b) Inverter input AC voltage and DC voltage
c) System output
d) System output power
e) System output current
f) Input voltage to the rectifier
g) Input current to the rectifier
a) Rectifier high voltage trip setting review
b) Determination of the synchrony angle
c) Review of the operation of the module fault detector
d) Inverter undervoltage trip adjustment
e) Check the operation of the inverter voltage detector
f) Review of the operation of the bypass voltage detector
g) Review of the operation of the system output voltage detector.
h) Review of the operation of the overcurrent detector
a) Review of voltage and frequency acceptance ranges of the rectifier with respect to the ranges handled by the normal and emergency feeders.
b) Transfer and retransfer operations and tests
c) Studies of harmonic distortion (THD) both at the input and output of the system and delivery of the corresponding report of results.
d) Power factor determination
e) Measurement of the resistance of the ground system from which the UPS is powered.
f) Review and assessment of the electrical installation infrastructure related to UPS’s.
Corrective Maintenance
Replacement of defective components with new and original components and others of equivalent characteristics.
