3-20
Section 3-7 – Ground Fault Detection
Ground fault detection sensitivity is 600K Ohms for Class B, Style Y connections. If ground fault
detection is not desired, remove jumper W6. See Figure 3-15 on page 3-15 for location.
Section 3-8 – Battery Care and Backup Battery Calculations
Care of Sealed Lead Acid Batteries
Sealed lead acid batteries are designed to operate in standby service for approximately five
years. This is based upon a normal service condition where there is an ambient temperature of
20 degrees C (68 degrees F) and batteries are completely discharged once every three months.
LENGTH OF SERVICE LIFE WILL BE DIRECTLY AFFECTED BY THE NUMBER OF
DISCHARGE CYCLES, DEPTH OF DISCHARGE, AND AMBIENT TEMPERATURE.
Use Guidelines:
Avoid installation and/or operation in close proximity to heat sources. While the operating
temperature range is 0 to 49 degrees C (32-120 degrees F), battery life will be maximized at an
ambient temperature of 20 degrees C (68 degrees F).
Batteries may generate ignitable gases. Because of this, batteries shall be installed in a well-
ventilated location, away from spark producing equipment.
Batteries shall not be installed in an atmosphere where organic solvents or adhesives may be
present. The batteries shall not be cleaned with oils, thinners, or similar substances. The case
and cover of the batteries are ABS plastic resin, which may suffer damage from these chemicals.
Batteries shall not be installed in a heavy vibration or shock location.
Insulated gloves shall always be worn when handling batteries.
WARNING: BATTERIES SHALL NOT BE CRUSHED, INCINERATED, OR DISMANTLED.
THE ELECTROLYTE CONTAINS SULFURIC ACID, WHICH CAN CAUSE SERIOUS DAMAGE
TO EYES AND SKIN. IF CONTACT DOES OCCUR, FLUSH WITH WATER AND SEEK
IMMEDIATE MEDICAL ATTENTION.
Batteries of different capacities, age, or manufacturer shall not be used together.
Battery Storage
Batteries which are to be stored for an extended period of time should be given a supplement
charge monthly. Batteries should never be stored in a discharged condition.
The self-discharge rate of batteries is approximately 3% per month when the storage temperature
is maintained at 20 degrees C (68 degrees F). The self-discharge rate will vary depending upon
temperature. Cooler temperatures cause the self-discharge rate to decrease. Warmer
temperatures cause the self-discharge rate to increase.
Calculating Backup Battery Requirements
A Worksheet for assisting in calculating battery backup is available at the end of this manual.
Due to the current drain on the battery, the maximum battery size for the SP40/2 is 12
Amp-hours.
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