BG / BS / LIR — electronic battery protection relays and isolators 10–500 A
Country: Netherlands · Model: BG / BS / LIR
BG, BS and LIR electronic devices protect batteries from deep discharge and separate the starter and service batteries during charging. They work on 12/24 V systems with automatic voltage detection, at currents from 10 to 500 A. They go into RVs, boats and machinery so house loads cannot flatten the battery that starts the engine.
- Battery Guard BG/BGW
- 10–400 A, load disconnect on deep discharge, 10 programmable thresholds
- BS DUAL isolators
- 100–500 A, 12/24 V automatic
- Voltage
- 12/24 V auto-detection
- Consumption
- ~ 2–4 mA
Technical specifications
| Battery Guard BG/BGW | 10–400 A, load disconnect on deep discharge, 10 programmable thresholds |
|---|---|
| BS DUAL isolators | 100–500 A, 12/24 V automatic |
| Voltage | 12/24 V auto-detection |
| Consumption | ~ 2–4 mA |
| Customs codes (for reference) | |
| HS code | 8536.49 |
| UKTZED code (Ukraine) | 8536490090 |
| CN code (EU) | 85364900 |
Specifications are taken from the manufacturer’s technical documentation. Updated . Customs codes are for reference only; the final code is determined at customs declaration for the specific model.
Description
Battery Guard BG/BGW relays rated 10–400 A go in the positive lead between battery and load and disconnect the load on deep discharge. The trip point is chosen from 10 programmable thresholds, set higher for a starter battery to keep energy for cranking and lower for a traction battery. BS DUAL isolators rated 100–500 A join the batteries while the alternator or a charger is charging and split them when voltage falls, so the starter battery stays full. An electronic relay has no contacts to burn when switching high current. Self-consumption is about 2–4 mA, so weeks of parking do not drain the battery. All devices detect 12 or 24 V system voltage on their own.
How to choose
Size the Battery Guard by the peak load current in its circuit, within 10–400 A, and the BS DUAL isolator by alternator or charger current, within 100–500 A. Inverters such as a 12/24 V PS or PSI have their own low battery cutoff and usually connect straight to the battery, while the BG protects DC circuits. On EURO 5/6 vehicles with a smart alternator an isolator leaves the service battery undercharged, so a DC-DC charger such as the Elogic EL at 30–50 A replaces the BS DUAL.
Request a price and lead time
BG / BS / LIR — electronic battery protection relays and isolators 10–500 A. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What current is the Battery Guard rated for?
BG/BGW units are rated 10–400 A.
How much does the BG relay draw on standby?
Self-consumption is about 2–4 mA.
Can the starter and service batteries be separated?
Yes, BS DUAL isolators rated 100–500 A do this during charging.
How is the Battery Guard cutoff set?
The trip point is picked from 10 programmable thresholds to suit the battery type and duty.
Does a BG or BS need setting for a 24 V system?
No, the devices detect 12 or 24 V on their own when connected.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.