Battery disconnectors OB

 

 
  • Up to 10 A
  • For 12, 24 and 48 V accumulators
  • Signalization of voltage drop
  • Protection of accumulator by current fuse
  • Optional external contactor (model OBS)
  • Can externally disconnect an accumulator
  • Mounting on a DIN rail

 

Accumulator disconnector is designed to protect accumulators against deep discharge and consequent damage. This can happen in case of a long-lasting power outage, when the device is powered from a back-up accumulator. Accumulator's voltage value is sampled and compared to reference voltage Uref1, Uref2. In case that the voltage of accumulator drops below value Uref1 (Uref1 = 10,5 V), the positive pole of accumulator is disconnected from the device.

 

The disconnector has a protection against reversing of poles and a protection against short-circuit by a 10 A current fuse which is accessible to customer. The disconnectors are designed to handle maximum current of 10 A. The value Uref1 = 10,5 V is valid for accumulators with nominal voltage of 12 V. For other accumulator systems (24 V, 48 V) the value is Uref1 = 21,0 V, 42,0 V. The value Uref2 also changes accordingly.

 

Version OBS is used to control external contactor, which allows to produce disconnectors for higher currents.

 

Table 1: Technical data

 

 
Nominal current 10 A
Nominal voltage 12, 24, 48 V
Signalization of voltage drop 11, 22, 44 V
Disconnecting voltage 10,5, 21, 42 V
Accumulator protection Current fuse 10 A
Dimensions 66 × 48 × 46 mm
Weight 80 g
Protection IP 00
Operating temperature -15 °C to 40 °C

Documents

 

Leaflet OB
Declaration of conformity
 
 



Table 2: Models of battery disconnector OB

 

 
 

Voltage of

accumulator

used

Maximum
current
Uref1 Uref2 Signalization before
accumulator
disconnection
External
control of
disconnection
OB12V/10A.0 12 V 10 A 10,5 V
OB12V/10A.1 12 V 10 A 10,5 V 11 V yes
OB12V/10A.11 12 V 10 A 10 V 11 V yes yes
OB24V/10A.0 24 V 10 A 21 V
OB24V/10A.1 24 V 10 A 21 V 22 V yes
OB24V/10A.11 24 V 10 A 20 V 22 V yes yes
OB48V/2A5.0 48 V 2,5 A 42 V
OB48V/2A5.1 48 V 2,5 A 42 V 44 V yes
OB48V/2A5.11 48 V 2,5 A 40 V 44 V yes yes
OBS48V/02A.0 48 V 2 A 40 V


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