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VICTRON ENERGY CYR020120430, is a protection relay for lithium batteries. It is used if the system does not have a starter battery.
VICTRON ENERGY CYR020120430, is a protection relay for lithium batteries. It is used if the system does not have a starter battery. The Cyrix connects a battery charger with a three-second delay if: The charging output from the VE.Bus BMS is high or if the voltage is more than 27.4V on the charging side, or if it is more than 4V on the battery side. The Cyrix-Li-Charge disconnects immediately if the control input becomes free, indicating overvoltage or overtemperature on the cell.
Typically, an overvoltage alarm resets shortly after charging has stopped. The Cyrix will then reconnect to the charger after three seconds. After two attempts to connect at three-second intervals, the interval is increased to 10 minutes. If the battery voltage is less than 27V, the Cyrix disconnects with a one-hour delay.
Overheat protection
The Cyrix disconnects if temperatures become too high, and reconnects when it has cooled down.
No voltage loss
Cyrix battery combiners are an excellent replacement for isolation diodes. The big advantage is that there is no voltage loss, so the voltage from the alternator or battery charger does not need to be increased.
Prioritization of the starter battery
In a typical installation, the alternator is connected directly to the starter battery. The house battery and possibly a bow thruster battery or other battery, are each connected to the starter battery with a Cyrix battery combiner. When a Cyrix senses that the starter battery has reached the coupling voltage, it ensures that the others are charged in parallel.
Bidirectional voltage sensing
The Cyrix senses the voltage from both batteries. It can therefore also connect if, for example, the house battery is charged with a charger. The Cyrix-ct 12/34 has a dual power supply. Therefore, it will switch on if the voltage from one battery is too low to control the unit. To protect against accidental use, the Cyrix-ct will not close if the voltage is lower than 2V (12V batteries) or 4V (24V batteries).
Parallel connection in emergency (Start Assist)
The Cyrix can also be switched on with a push button (Cyrix is closed for 30 seconds) or a switch for manual operation. This is suitable if a battery is discharged or damaged.
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