Note! Estimated battery lifetime is calculated based on most common scenario but will
vary based on factors such as temperature.
The failsafe option offers a safety aspect in terms of operation after a failure. As
there are an internal battery and onboard management, it is possible to
preprogram the actuator to move to the predefined safest position when contact
with the actuator is lost.
The failsafe function supports the following protocols:
• Fail-maintain: The actuator keeps the position.
• Fail-to-open: The actuator moves to the valve open position.
• Fail-to-close: The actuator moves to the valve closed position.
It is not possible to have different protocols for different types of errors.
Note! The actuator cannot activate any other command when the failsafe protocol has
been initiated, even during the pre-set timeout counter.
The product is certified with a yearly required battery discharge test. To keep the
product in a certified state, a plan for both performing and executing this
discharge test must be created. Due to the possibility that the class and the
certificate have different requirements, the strictest of the two shall be followed
and testing performed according to those requirements.
The purpose of this discharge test is to safely establish the real battery capacity
(SOH). Please refer to section B.8.i Battery discharge and charge on page 78 for
instructions on how to perform this test.
Eltorque recommends that, independent of the battery health status, the battery
is replaced every 5 years during vessel classifications to secure proper
functionality when needed.
All deviations to ideal conditions will reduce the battery life time.
The following storing conditions are recommended for the product (actuator
and/or battery)
• The storing temperature should be 15°C/59°F.
• The battery must be fully charged before storage.
If the planned storage of the battery is above the limits for storage set by
Eltorque, maintenance charging needs to be done. The below instruction is the
Eltorque recommendation when charging is needed:
• The battery should be charged with CC/CV charging algorithm (900mA
constant current (CC) up to 14.7V. When the charging voltage reaches 14.7V
keep the voltage constant (CV) and stop charging when the charging current
reaches 90mA or after 32 hours total CC/CV charging time.
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