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