ABB POT 74 Keyboard POT 74 H&B Contronic

ABB POT 74 Keyboard POT 74 H&B Contronic

Basic information

The POT 74 is a specific keypad in the ABB and H&B Contronic range for use in specific industrial control or related systems to provide the user with the ability to enter operational commands, etc. The POT 74 is a keypad for the ABB and H&B Contronic range.

Performance characteristics

Design and layout:

Ergonomic considerations: the keyboard has been designed with ergonomics in mind, with a reasonable key layout that conforms to the operating habits of the human hand, making it easy for users to use the keyboard for long periods of time and reducing fatigue.

Reasonable layout of the function keys: the layout of the function keys has been carefully designed, with numeric keys, alphabetic keys and a variety of control keys, etc., and may also be equipped with some specific functions of the shortcut keys, so as to facilitate the user to quickly perform commonly used operations and improve work efficiency.

Functional features:

High input accuracy: The sensitive and accurate response of key triggering ensures the accuracy of the user's input of commands, data or parameters, and effectively avoids equipment failures or production problems caused by input errors, which is suitable for industrial control scenarios that require high input accuracy.

Good compatibility: Strong compatibility with other ABB and H&B related equipment and systems, can be easily connected to industrial control equipment, computer systems or automation workstations, etc., and can be quickly recognised by the system and normal use, to achieve a seamless connection, easy system integration.

Strong durability: Made of high-quality materials, the shell is sturdy, can withstand a certain degree of physical impact and wear and tear, to adapt to the frequent use of industrial environments. Long key life, after many key operations can still maintain good performance, not easy to appear key failure or character wear and tear and other problems.

Application areas **

Industrial automation control: In industrial automation production lines, operators can use the keyboard to input control commands to perform various operations on the production equipment, such as starting/stopping the machine, adjusting the parameters of the equipment, setting variables in the production process, etc. It can also be used for data entry in the monitoring system.

Process control industry: in the chemical, petroleum, pharmaceutical and other process control field, used for process control system operation and parameter setting, such as input reactor temperature, pressure, flow and other parameters of the set value, adjust the valve opening, etc., to ensure the safe and stable operation of the production process.

Intelligent building system management: In the control system of intelligent buildings, such as building automation system, it can be used for inputting and adjusting the control parameters of various equipments in the building, and realising the intelligent management of the HVAC system, lighting system, water supply and drainage system.

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