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Voltage Sensitive Split Charge Relay – 12V 140A

£39.99

12V, 140A rated voltage sensitive relay for split charging applications in camper vans, motorhomes, 4x4s and boats.

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Description

Voltage Sensitive Split Charge Relay – 12V 140A

12V, 140A rated voltage sensitive relay for split charging applications in camper vans, motorhomes, 4x4s and boats. 

The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and leisure) to be charged simultaneously. When the voltage drops below 12.8 volts (eg. the engine is stopped), the VSR disengages, separating the batteries. This system eliminates the possibility of draining the wrong battery and protects sensitive electronic equipment powered from the house battery from harmful engine start up spikes.

Details

  • Dual sensing operation – charges from starter battery to leisure battery when alternator is running and charges from leisure battery to starter battery when mains charger is connected.
  • Relay connects when sensed voltage reaches 13.7V or higher
  • Relay disconnects when sensed voltage drops to 12.8V or lower
  • Maintains battery isolation when not charging, so starter cannot be drained by leisure use and vice-versa.
  • Ignition protection to UL1107
  • Fully automatic operation
  • E Mark approval
  • Virtually zero voltage drop
  • Protects sensitive electronic equipment from harmful engine start-up spikes
  • Well proven design with 1000s of units operating in the field
  • Terminal connections marked on inside of unit for easy installation
  • Note: The benefit of this type of relay is that it does not require a connection to the alternator or any modifications to the existing vehicle electrical system. Simply connect the +ve terminals on each of your batteries to the terminals on the relay and the black relay wire to a common -ve point.

An LED indicates when the relay is ON (contacts closed). Fixing holes in the body allow the unit to be mounted to a bulkhead and body cut-outs offer various cable routing options.

Fully encapsulated electronics make this unit splashproof and particularly suitable for harsh environments (marine use, vehicle engine bays etc.)

IMPORTANT NOTE: These relays are not suitable for vehicles with ‘smart’ or ‘intelligent’ alternators. As a guide this applies to vehicles having engines that comply with Euro5 emissions standards and onward, often also incorporating regenerative braking (if in doubt please consult your vehicle manufacturer to confirm). If your vehicle has a smart alternator then you will need to use a battery-to-battery charger instead of a VSR.

Specification

  • Sensing mode: Dual (2-way split charging, starter to leisure and vice-versa)
  • Voltage rating (nominal): 12V DC
  • Current rating: 140A
  • ‘Cut-in’ voltage: 13.7V
  • ‘Cut-out’ voltage: 12.8V
  • Terminal size: 2 x M6 studs and nuts
  • Other connections: Ground wire to connect to common -ve
  • Ground wire: 1mm2 – 50cm long approx.
  • Fixing hole dia: 5mm
  • Overall dimensions: 67 (W) x 67 (H) x 50 (D) mm

 

Additional information

Weight 1 kg
Dimensions 67 × 67 × 50 mm

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