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Battery systems that are properly maintained by qualified power specialists will operate with optimized performance. We have the experience, training, and special tools required to perform all of your maintenance needs. We follow a rigorous process recommended by IEEE Std. 1188 for a high level of support you can depend on.
Experience
We have experience supporting critical installations across a broad range of applications:
  • Central Office
  • Wireless Cell Sites
  • UPS – Data/Critical Power Offices
  • Utility Switchgear Plants
  • Other businesses
Rigorous Process
NDSI strictly follows the guidelines of IEEE Std. 1188.
Scheduled maintenance and records of each service can expedite resolution of any warranty claims.
1. Initial Inspection
After the battery has been on float for one week, the following data and information will be recorded:
  • Ambient temperature in the area surrounding the battery installation
  • Charger output voltage
  • Overall float voltage
  • Charger imposed AC ripple current and/or voltage
  • Condition of ventilation and monitoring equipment
  • Condition of battery (appearance, cleanliness, accessibility)
  • Cell number
  • Internal ohmic value
  • Negative terminal temperature
  • Inter-cell connector resistance
2. Monthly Inspection
The following are checked as part of our monthly inspection:
  • Ambient temperature of the battery installation area
  • Charger output current
  • Charger output voltage
  • Overall float voltage of each battery string, measured at the battery terminals
  • Condition of ventilation and monitoring equipment
  • Condition of batteries (appearance, cleanliness, accessibility)
  • Cell number
  • Visual inspection of each battery for signs of wear to the case, cover or terminals. Look for electrolyte leakage or corrosion at the terminals, connections, or racks
3. Quarterly Inspection
The following items are checked on a quarterly basis, in addition to the monthly inspection items:
  • Float voltage
  • Internal ohmic value
  • Negative terminal temperature
  • Inter-cell connector resistance
4. Annual Inspection
The following items are checked on a yearly basis, in addition to the monthly and quarterly items:
  • Cell-to-cell and terminal connection detail resistance of the entire battery
  • AC ripple current and/or voltage imposed on the battery
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