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SRAFESRAFE | Local Station

The SRAFE Local Station software consists of a modulus that acquires the analog and digital channels continuosly and stores the values with 14 bits of resolution. In case of a trigger, the pre-trigger, post-trigger and extended fault data are transferred from the board to the PC and an event file is generated for later evaluation.

The real time RMS value for each channel and equipment status like time, date, fault counter and last event information are displayed in the main screen. An audible alarm and an external contact are provided to indicate recorder activation. The trigger status is signaled with color lights indicating armed, disarmed or activated.

All changes and events are recorded in a log file with information of time and date, and description of the event.

Recording times are fully configurable for each event file and an extended fault time records an additional time if a trigger is asserted during the post-fault time. The event files are stored in COMTRADE IEEE format.

An Ethernet connection may be used for downloading event records, transfer real time information to a Master Station PC, voltages, currents and calculated values (P, Q, S, etc may be sent to one or more PCs.

The recorders can be remote controlled (screen and keyboard captured) from any authorized PC in the network.

Acquisition Modules:

  • Small 2U unit modules for analog and digital channels.
  • Analog Voltage channels, 115/v3 V - .
  • Analog Current channels, 1A – 5 A
  • Digital channels. - Rack mount 32 channels digital module.

Output contacts:

  • Up to 3 user-configurable contacts activated by triggers.

Time synchronization:

  • External GPS module with clock synchronization receiver, antenna and wiring.

SRAFE Central Unit:

  • PC based Central processor.
  • Hard disk or Solid State disk drive for data storage.
  • Microsoft Windows compatible software.
  • Intelligent Acquisition Processor.
  • Up to 12000 Hz sampling rate per channel.
  • 14 bits analog channel resolution.

Triggers:

  • Limit triggers (high and low values definable) in all analog input channels.
  • Rate triggers (positive and negative values definable) in all analog input channels
  • Keyboard trigger.
  • External digital trigger, on any digital input.
  • Trigger temporary annulment.
  • 3 programmable alarm relays.

Records:

  • High speed oscillographic fault records with definable pre, post and extended fault time.
  • Low speed Swing / RMS records with definable pre and post fault time. Includes power magnitudes, power factor, frequency, etc. 1 sample/cycle.
  • Very low speed trend recording with definable sample rate.

Logging:

  • Daily log file automatically generated.
  • Configurable event log.
  • Password protection.

Analysis tools:

  • Relevant event information is embedded in each trigger.
  • All events are saved in COMTRADE format (IEEE Standard Common Format for Transient Data Exchange for Power Systems).
  • CPTgraph COMTRADE Viewer software tool.

The Analysis feature offers an array of advanced tools for navigating traces, peak hopping, amplitude and time scaling, superimposing, peak detection, RMS and phase calculation, the display of harmonics, instantaneous values, sequence components, triggers, envelopes, and time synchronization of multiple records in one easy to use friendly interface.

Voltage and Current Input Modules:

  • 19" Rack mount modules.
  • 32 analog channels in each module.
  • Precision current adapters with Zero-Flux working principle.
  • Up to 512 analog channels.
  • Signal adapter modules include protection circuits, galvanic isolation, anti-aliasing filtering and sample and hold for simultaneous channel acquisition.
  • Nominal values on request. E.g.: 110/v3 V, 1 or 5 A.
  • 5th. order antialiasing filters with programmable cutoff frequency.
  • Simultaneous sampling in all channels.

Digital input modules:

  • 32 opto-isolated digital channels in each module.
  • Up to 1024 digital channels.
  • Signal adapter modules for digital inputs with opto-isolated circuits. 2 terminals per channel.
  • Voltage values on request. E.g.: 125 V DC.
  • 3 alarm relays.

Comunications:

Ethernet connection:

  • Recorders can be connected to a LAN and records downloaded to any authorized PC in the network.
  • Recorders can be remote controlled (screen and keyboard captured) from any authorized PC in the network.

Fault files can be sent automatically to an e-mail address or Dropbox type account.

Optional Analyzing Software:

As the records are generated in COMTRADE IEEE format, any software that reads COMTRADE files may be used. Optional software can be provided.

ISO TÜV ID: 9105064505