ABB Termination Plug PZ 755 H&B Contronic

ABB Termination Plug PZ 755 H&B Contronic

Technical Parameters

Rated Voltage: Usually can withstand about 250V AC or other voltage levels suitable for industrial control, in order to meet the electrical safety requirements of different application scenarios.

Rated current: the rated current is generally between a few amps and a dozen amps, common 10A, etc., according to the actual load conditions to choose the right model, to ensure that no overheating, damage and other problems due to overloading during normal operation.

Contact resistance: the contact resistance is very small, generally in the milliohm level or even lower, in order to reduce the loss and heat in the signal transmission process, to ensure the efficiency and quality of signal transmission.

Insulation Resistance: High insulation resistance, usually above megohm level, such as 1000MΩ or more, to ensure good electrical insulation performance and prevent leakage, short circuit and other faults.

Application Scenario

In the field of industrial automation: in the control cabinets and distribution boxes of automated production lines, it is widely used to terminate and connect all kinds of control signals, power signals and other lines, such as the connection lines between PLC and sensors and actuators, to ensure the stable operation of production lines.

Power electronic equipment: in the frequency converter, inverter, soft starter and other equipment, used to connect the internal circuit board with the external power supply, motor and other lines, play a role in signal transmission and electrical isolation, to prevent high-frequency signals within the equipment, high voltage and other external equipment and personnel.

Intelligent building electrical system: in the lighting control system, security monitoring system, elevator control system, etc. of intelligent buildings, it can be used to connect the signal lines between each device to ensure the normal operation and safety of the system.

Rail transportation field: in the signal system, power supply system, vehicle control system, etc. of subway, light rail and other rail transportation, it can be used to connect the lines between various electrical equipments and control modules, to ensure the safe operation of trains and the accuracy of signal transmission.

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