Protection set

Protection functions available in CZAZ-GTM(G) are listed below:

Protection functions are supported by logic circuits, which are designed using available measuring functions, Boolean operators and timers. It allows to configure advanced automation circuits, for example:

• breaker failure logic, which provides redundancy trip signal of electrical part of power unit in case of failure operation of generator breaker
• control generator excitation system, used in case of occurance of disturbances requring immidiate generator excitation system switch off
• Against connection of unexcitated generator (50/27)

Main features

• Up to 19 analog inputs. The type of analog inputs adjusted to the set of instrument transformers applied in particular protected object
• 16 binary inputs for external protection relays
• 4 relay outputs for triping purpose (3 outputs allows to direct connection with breaker coils)
• 12 relay outputs for signalling purpose
• Possibility to adapt easily protection functions characteristics with biult-in software, disigning logical circuits, timers and control algorithms, registers and signalling. The configuration of protection unit is carried out by the manufacturer or authorised representative
• Possibility to group signals in any configuration in order to get logical sum of trip signals
• Measuring of electrical values (current, voltage, active and reactive power, frequency, phase shift, resistance, reactance, apparent impedance)
• Event recorder (256 unique events, capacity up to 5000 events, time resolution 1 ms)
• Disturbance recorder:
  • sampling frequency 1800 Hz
  • recording up to 40 analog signals and up to 128 binary signals
  • duration of recorder waveform – up to 500 sec. for one signal (approx. 10 sec. for 40 analog signals and 128 binary signals)
  • memory allows to safe up to 32 files of registered disturbances
  • recording of sampled or digital filtered values (e.g. differential currents)
• Optical signalling at HMI (14 LED diodes)
  • auxilliary voltage signalling
  • proper work of unit signalling
  • 12 programmable diodes for signalling other statuses
• Expanded self-control system and failure signalling
• Autonomic communication by local HMI
• Remote communication with PC computer or SCADA system (two RS485 ports and one RS232 in front panel)
• Free PC software for Windows operating system
• Enclosure addepted for surface mount

TECHNICAL DATA