Digital Display POI 01 H&B Contronic

POI 01 Digital Display Manufacturers ABB, Hartmann & Braun Model(s)

ABB H&B Contronic, ABB H&B Contronic P

Estimated Shipping Size Dimensions: 5.0" x 1.0" x 10.0" (12.7 cm x 2.5 cm x 25.4 cm)

Weight:  0 lbs 8.0 oz (0.2kg ) POI 01

 Electronic microprocessor-based trip units

 For uses in alternating current, the Tmax T2, Isomax S4, S5, S6, S7 and S8 circuit breakers can be

 fitted with SACE PR221DS, PR211/P and PR212/P overcurrent trip units using microprocessor

based technology. This allows protection functions which guarantee a high level of reliability, trip

 precision and insensitivity to the electromagnetic components in compliance with the applicable

 standards. The power supply required for correct operation is supplied directly by the current trans

formers of the trip unit, and is always guaranteed, even in conditions of single-phase load, and in

 correspondence with the minimum setting.

 These protection trip units consist of the current transformers, the SACE PR221DS or PR211/P or

 PR212/P protection unit and an opening solenoid, with demagnetization which acts directly on the

 operating mechanism unit and is mounted in the right-hand slot for T2 or in the trip unit case for

 Isomax.

 The transformers are housed inside the trip unit box and supply the energy required for correct

 operation of the protection and the signal needed to detect the current. They are available with

 primary continuous rating current as indicated in the table.

 When the protection trips, the circuit breaker opens by means of the opening solenoid, which changes

 over a bell alarm contact to signal trip unit tripped. Resetting the signal is mechanical and takes place

 when the circuit breaker operating lever is reset.

 It is possible to test the opening solenoid by means of the SACE TT1 device. A positive test will trip

 the breaker.

 Setting the adjustment parameters of the protection functions is carried out directly from the front of

 the releases by means of dip-switches and, for PR212/P, remotely, too, thanks to the use of the

 SACE PR212/D(1) dialogue units, available with Modbus or LON communication protocols.