ZIRO-F6

16 + 32 CHANNEL
DISTURBANCE RECORDER

ZIRO-F6 disturbance recorder is a stand alone equipment built in a substation or power station. It makes snapshots of the transient events of electric power systems, like switching surges, short circuit currents, voltage swells or sags, and enables the evaluation of the stored events. It consists of a signal conditioner, an A/D conversion board and an IBM PC/AT type industrial computer housed in the same metal box. The input units of the signal conditioner are isolated. The inputs should be specified by the user (the 16 analog inputs can be voltage or current input adjusted for the secondary of CT or VT, while the 32 digital inputs can be connected to a DC voltage via relay contacts e.g. DC voltage of the protection system), when ordering.
The sampling of ZIRO-F6 is synchronous with the actual network frequency. This operation mode results in an accurate zero crossing detection and high accuracy measurement against the equipment being lack of the synchronous sampling. An LCD (128x240 pixel) is built in to enable displaying of the measured time functions immediately on site.
The built in watchdog ensures a continuous self-control. Interruption or failure of operation will be stored on a separated memory.
A dedicated software package is included to download and evaluate the measured signals. Using this program, the measured data can be downloaded during continuous normal operation of the equipment via serial port into another PC, or via modem, into a central data acquisition system. The evaluation software runs under MS Windows.
A double hierarchical structure was developed to avoid misprograming of the equipment by unauthorised persons.

Technical specification

Supply voltage: 220 VDC, -20+10% (other value on request available)
Input power: max. 100 VA
16 analog inputs: range, overloading are subject of order (e.g. (100/ V, 100V, 200/ V, 200V, 1A, 5A)
the inputs are isolated
frequency response: 40-3000 Hz
accuracy: 0,5%
resolution: 12 bit
32 digital inputs: number of isolated units is subject of order as well as the nominal voltage (220 VDC, 110 VDC e.t.c.) the inputs are reverse voltage protected and isolated
Frequency measurement: 45-61 Hz (signal of the 1st analog channel)
accuracy: 0.01% *0.01Hz
Main data of the recording

sampling rate: programmable 100 Hz-10 000 kHz
pretrigger time: programmable 0-5 620 ms
posttrigger time: programmable 100-32 000 ms
expanded recording time: programmable 0-max posttrigger time (when during a snapshot a triggering occurs again in a given interval of the posttrigger time, the recording interval will be expanded

Trigger conditions: (can be set from software)

for the analog inputs: falling and/or rising over a threshold (e.g. voltage drop, or overcurrent)
for the digital inputs: falling and/or rising edge (to avoid false triggering , the condition should be stable for a programmable time: 1-10 ms)

Outputs: missoperation signal (relay contact)

Services:

built in clock: date, hour, minute, second
storing capacity: approximately 600 events
watchdog: report
triggering: setting of conditions
copy to softdisk: built in FDD
on-site visualising: built in graphic LCD
on-site printing: hardcopy, headline, time functions table of variation of the digital signals (optional)

Data transfer via:

on-site hardcopy(optional) with date, numbering, frequency, headline, time functions of analog and digital signals, list of change of digital states
soft diskette
serial port RS 232-C (optional)
telephone modem (optional)
optical cable (fibre or plastic) (optional)

Environmental conditions:

operation temperature: 0 +40*C
storage temperature: -10 +60*C
relative humidity: 90% (without vaporisation)

Mechanical data

width: 443 mm
height: 451 mm
depth: 229 mm
weight:~19 kg