Osculati Voltage Sensitive Relay – Code 14.921.90
Osculati Voltage Sensitive Relay – Code 14.921.90
DISCRIPTION
DISCRIPTION
Osculati Voltage Sensitive Relay – Code 14.921.90
Overview
This voltage sensitive relay (VSR) enables simultaneous charging of two batteries using a single alternator, making it ideal for dual battery systems in marine or automotive applications.
Operation
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Engine Start
The relay remains open while the engine is starting. It only activates once the starter battery voltage reaches:-
13.7 V (for 12V systems)
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27 V (for 24V systems)
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Charging Phase
When the above voltage is reached, the relay closes the contact, allowing both batteries to be charged simultaneously. -
Engine Stop
As the engine stops and voltage drops below:-
12.8 V (for 12V systems)
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25.2 V (for 24V systems)
The relay opens the contact, separating the two batteries.
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Key Features
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✔️ Prevents discharge of the starter battery from onboard service loads
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✔️ Avoids current spikes harmful to onboard electronics during engine restart
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✔️ No voltage drop during operation
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✔️ No current consumption in standby mode
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✔️ Automatic 12V / 24V system detection
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✔️ Easy to install – no need to modify alternator wiring
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Smarter Power. Safer Seas. Trusted Gear.
Protects Your System
Prevents starter battery drain by isolating house loads when the engine is off—ideal for dual battery setups.
Corrosion Protection
Blocks low-voltage DC currents that cause galvanic corrosion while maintaining full AC safety ground connection.
Clean Sine Wave Output
Provides a pure, clean sine wave to protect sensitive electronics and ensure optimal performance of onboard devices.
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