ABB DCF 77 Outdoor Antenna AW02 H&B Contronic

ABB DCF 77 Outdoor Antenna AW02 H&B Contronic

Basic information

Type: AW02 for all Meinberg DCF77 (AM and PZF type) longwave radio receivers.

Dimensions: 245mm x 106mm x 68mm, product weight 0.55kg, mounting kit included.

Performance features

Environmental compatibility: Weatherproof and temperature resistant with an operating temperature range of - 25°C to + 65°C. The rugged plastic housing is IP56 rated and rubber sealed to protect the internal electronics, ferrite rods and windings from external influences.

Signal transmission distance: up to 300m between antenna and receiver using standard RG58 cable, longer distances can be achieved using amplifiers or fibre optic pair antenna systems.

Installation and Adjustment: Equipped with a wall mounting bracket for easy outdoor installation, the antenna can be rotated 360°, making it easy to adjust the orientation for optimal signal reception.

Electrical Connection: RG58 coaxial cable and N-type connector for indoor and outdoor installation, cable length can be customised.

Service and Maintenance

• Only qualified personnel should carry out repairs. 

• The agreed warranty applies. 

• Before carrying out any cleaning or maintenance operations, disconnect the equipment from the electrical supply. 

• Clean the display and surrounding front cover with a soft cloth and mild detergent. 

• Replacing the battery incorrectly may result in explosion. Only use batteries recommended by the supplier. During the warranty period, the battery needs to be replaced by an authorized ABB service center

FEATURE

• Low-impedance busbar protection 

• Stub and T-zone protection 

• High functional reliability due to two independent measurement criteria: 

- stabilized differential current algorithm 

- directional current comparison algorithm 

• Phase-by-phase measurement 

• Reduced CT performance requirements 

• High through-fault stability even in case of  CT saturation 

• Full solid-state busbar replica 

• No switching of CT circuits 

• Only one hardware version for  

- 1 and 5 A rated currents 

- all auxiliary supply voltages between  48 V DC and 250 V DC 

- nominal frequencies of 50, 60 and  16.7 Hz 

• Short tripping times independent of the  plant’s size or configuration 

• Centralized layout: Installation of hardware  in one or several cubicles 

• Distributed layout: Bay units distributed  and, in the case of location close to the  feeders, with short connections to CTs, isolators, circuit breakers, etc. 

• Connections between bay units and central  unit by fiber-optic cables 

- maximum permissible length 1200 m  

- for distributed and centralized layout 

• fiber-optic connections mean interference proof data transfer even close to HV power  cables 

• Replacement of existing busbar protection  schemes can be accomplished without restrictions (centralized layout) in the case of  substation extensions e.g. by a mixture of  centralized and distributed layout 

• Easily extensible