Enersys SuperSafe T-FT Front Terminal Batteries Instruction Manual
- June 3, 2024
- EnerSys
Table of Contents
T-FT Front Terminal Batteries
Instruction Manual
Visit us at www.enersys.com
SuperSafe T-FT Front Terminal Batteries
Important
Please read this manual immediately on receipt of the battery before unpacking
and installing. Failure to comply with these instructions will render any
warranties null and void.
Care for your safety
| No smoking, no naked flames, no sparks
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| Electrical hazard
| Electrolyte is corrosive
| Shield eyes
| Danger
| Clean all acid splash in eyes or on skin with plenty of clean water. Then
seek medical help. Acid on clothing is to be washed with water
| Read instructions
| Recycle scrap batteries. Contains lead
| Warning: Risk of fire, explosion, or burns. Do not disassemble, heat above
60°C, or incinerate. Avoid any short circuit. Metallic parts under voltage on
the battery, do not place tools or items
on top of the battery
Handling
SuperSafe® T Front Terminal batteries are supplied in a charged condition and
are capable of extremely high short circuit currents. Take care to avoid
shortcircuiting terminals of opposite polarity.
Keep flames away
In case of accidental overcharge a flammable gas can leak off the safety vent.
Discharge any possible static electricity from clothes by touching an earth
connected part.
Tools
Use tools with insulated handles.
Do not place or drop metal objects on the battery. Remove rings, wristwatch
and articles of clothing with metal parts that may come into contact with
the battery terminals.
California Proposition 65 Warning – Battery posts, terminals, and related
accessories contain lead and lead compounds, chemicals known to the State of
California to cause cancer and reproductive harm. Wash hands after handling.
Receiving
Upon the receipt of the shipment, check the contents for damage and against the packing slip. Immediately inform EnerSys of any damaged or missing items. EnerSys® is not responsible for shipment damage or shortages that the receiver does not report to the carrier.
Storage
2.1. Storage Conditions and Time
If a battery cannot be immediately installed it should be stored in a clean,
cool and dry area. During storage monoblocs lose capacity through
selfdischarge. High temperatures increase the rate of self-discharge and
reduce the storage life. The chart below shows the relationship between open-
circuit voltage (OCV) and storage time at various temperatures.
The maximum storage times before a refresh charge is required and recommended open circuit voltage audit intervals are:
Temperature (°C / °F)| Storage Time (Months)| OCV Audit Intervals
(Months)
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+10 / +50| 48| 12
+15 / +59| 34| 12
+20 / +68| 24| 12
+25 / +77| 17| 6
+30 / +86| 12| 6
+35 / +95| 8.5| 3
+40 / +104| 6| 3
Monoblocs must be given a refresh charge when the OCV approaches the
equivalent of 2.10 Volts per cell or when the maximum storage time is
reached, whichever occurs first.
2.2. Refresh Charge
Charge the monoblocs or strings at a constant voltage equivalent to 2.29 –
2.40Vpc with a minimum 0.1C10 Amps available for a period of 24 hours.
2.3. Commissioning Charge
Before commencing operation, the battery must be given a commissioning charge.
The batteries should be charged using constant voltage with a minimum charge
current of 0.1C10 Amps with no load connected to the battery. Either of the
following methods can be used:
- Charge for 96 hours at the recommended float voltage of 2.29Vpc at 20°C or
- Charge for 24 hours at the recommended boost charge voltage of 2.40Vpc at 20°C. The battery will then be switched over to float charging, maintaining the battery under floating voltage for 24 hours before any discharge test.
Battery Location
The battery compartment/room must have adequate ventilation to limit hydrogen accumulation. Batteries must be installed in accordance with the IEC 62485-2 standard and any other local/national laws and regulations.
Installation
It is recommended that SuperSafe® T Front Terminal batteries are installed on
their base. Please consult your EnerSys representative about any other
installation orientation.
Each monobloc is supplied with terminal/connector fasteners.
On each monobloc the positive terminal is identified by a “+” symbol. Install
the batteries in accordance with the instructions and/or layout drawing,
taking care to ensure correct terminal location and polarity.
Connect the blocs with the connectors and fasteners provided. The fastener
torque value is indicated on the product label.
Place the insulating covers in position immediately after tightening the
fasteners.
Operation
The battery will give the best performance and service life when working at a
temperature of 20°C. The maximum operating temperature range is -30°C
to +45°C.
5.1. Standby / Float Operation
Constant voltage chargers are recommended. The charging voltage should be set
at the equivalent of 2.29Vpc at 20°C / 68°F or 2.27Vpc at 25°C / 77°F. The
minimum charging voltage, at any temperature, is 2.21Vpc. For temperatures
other than this, the recommended float voltage temperature compensation is as
follows:
Temperature (°C / °F)
| 10/50| 15/59| 20/68| 25/77| 30/86| 35/95| 40/104
Recommended| 2.33| 2.31| 2.29| 2.27| 2.25| 2.23| 2.21
Minimum| 2.31| 2.29| 2.27| 2.25| 2.23| 2.21| 2.21
5.2. Charging Current
Due to the very low internal resistance SuperSafe T Front Terminal batteries
will accept unlimited current during recharge but for cost and practical
purposes in float applications where recharge time to repeat duty is not
critical, the rectifier current can be limited to the load plus 0.1C10 Amps.
5.3. Grid Assist Cycling Applications
In instances where the time to repeat duty is critical the charge voltage
should be set to 2.40Vpc at 20°C, with the rectifier current limit set to a
minimum of 0.1C10 Amps. Fast charge should be stopped and reverted to float
voltage once full state of charge is reached. Further details can be found in
our application guide.
5.4. Periodic Boost Charge
In normal operation a periodic boost charge is not required. However, in some
cases such as when there has been no discharge duty over a 12 month period, a
boost charge equivalent to 2.40Vpc at 20°C for maximum of 10 hours can be
applied.
5.5. Discharging
Batteries must not be left in a discharged condition after supplying the load
but must immediately return to recharge mode.
Failure to observe these conditions may result in greatly reduced service
life.
Accidental deep discharging
For optimum operation the minimum voltage of the system should be related to
the duty as follows:
| Duty | Minimum end voltage |
|---|---|
| 5 min ≤ t ≤ 1h | 1.65V |
| 1h ≤ t ≤ 5h | 1.70V |
| 5h ≤ t ≤ 8h | 1.75V |
| 8h ≤ t ≤ 20h | 1.80V |
In order to protect the battery it is advisable to have system monitoring and
low voltage cut-out.
Deep discharge will produce a premature deterioration of the battery and a
noticeable reduction in the life expectancy of the battery.
Effect of temperature
Correction factors of the capacity, according to the temperature are
illustrated in the performance datasheet.
Operation of valve regulated batteries at temperatures higher than 20°C will
reduce life expectancy. Life is reduced by 50% for every 10°C rise in
temperature.
Maintenance
In practice, the user usually specifies the maintenance schedule based on site
criticality, location and manpower.
However, the following may be used as a suggested maintenance schedule.
- Monthly (record all readings)
- Measure the battery string voltage. If necessary, adjust the float voltage to the correct value.
- Check the ambient temperature in the immediate environment.
- Every six months (record all readings)
- Measure the battery string voltage. If necessary, adjust the float voltage to the correct value.
- Measure individual bloc voltages. After 6 months of operation blocs should be within 5% of the average voltage value.
- Check the ambient temperature in the immediate environment.
- Inspect for contamination by dust, lose or corroded connections.
If necessary, isolate the string/bloc and clean with a damp soft cloth. Warning: Do NOT use any type of oil, solvent, detergent, petroleum-based solvent or ammonia solution to clean the battery containers or lids. These materials will cause permanent damage to the battery container and lid and will invalidate the warranty.
Keep a logbook to record values, power outages, discharge tests, etc. An
autonomy check can be done once a year.
Contact EnerSys® if you have any questions regarding maintenance.
Disposal
SuperSafe® T Front Terminal batteries are recyclable. Scrap batteries must be
packaged and transported in accordance with prevailing transportation rules
and regulations.
Scrap batteries must be disposed of in compliance with local and national laws
by a licensed or certified lead acid battery recycler.
EnerSys World Headquarters
2366 Bernville Road, Reading,
PA 19605, USA
Tel: +1-610-208-1991 /
+1-800-538-3627| EnerSys EMEA
EH Europe GmbH
Baarerstrasse 18
6300 Zug
Switzerland| EnerSys Asia
152 Beach Road,
Gateway East Building #11-03,
Singapore 189721
Tel: +65 6508 1780
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of
EnerSys and its affiliates unless otherwise noted. Subject to revisions
without prior notice. E. &O.E.
ublication
No. APAC-EN-IOM-SS-TFT -003-0122 SEE1556
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Enersys SuperSafe T-FT Front Terminal
Batteries
[pdf] Instruction Manual
SuperSafe T-FT, Front Terminal Batteries, SuperSafe T-FT Front Terminal
Batteries, Terminal Batteries, Batteries
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