C.E.DI.T. EFI.06 User manual

EFI.06 EARTH FAULT INDICATOR
EARTH-FAULT DETECTION AND SIGNALLING
FOR MEDIUM VOLTAGE CABLES
EFI.06 Product manual
CT.01
OPTIONAL ACCESSORIES
BXI BOLT EXTERNAL INDICATOR
LAMP EXTERNAL INDICATORS
LXI.01 LXI.02

EFI Earth-Fault Indicator device for earth-fault detection and signalling on medium voltage networks:
• Designed to be installed on MV cables up to 33kV (underground, switchgears, cells, etc.).
• Local and remote earth fault signalling by means of ashing LED lamp and SCADA relay changeover contact.
• Up to four levels of trip current, selectable by internal jumpers (current values can be customer dened).
• Four reset modes: time-delay, 230Vac mains voltage, pushbutton reset and remote reset via SCADA (either
contact or voltage - factory preset)
• Up to four time-delay values for automatic time reset, selectable by internal jumpers (time-delay values
can be customer dened).
• Up to four fault delay values for transient cancellation, selectable by internal jumpers (delay values can be
customer dened).
• Correct operation (test) can be checked pressing the pushbutton on the front.
• Self-powered by the internal lithium battery with 10 years lifetime and over 1500 ashing hours.
• Battery can be easily replaced with lithium 3,6V - AA type (no soldering or tools required).
• Electronic module enclosed in IP65 box linked to the external current transformer CBCT.
• Split-type resin current transformer CBCT ring–type, composed by two halves that can be installed without
MV cables disconnection and held together by 4 allen screws.
IMPORTANT: FOR DEVICE OPERATION REMOVE BATTERY PAPER STRIP
EFI.06 Product manual
GENERAL DESCRIPTION
CURRENT TRASF.
INPUT
SECTION 1
2
3
4
5
6
7
8
9
10
11
OPTO
ISOLAT.
RESET
INPUT
EXT.
INDICAT.
DRIVER
RELAY
MICROCONTROLLER UNIT
+
BATTERY RESET and TEST
PUSHBUTTON
FAULT
FLASHING LED
LOW BATT LED
18
17
16
15
14
13
12
19
230ac MAINS RESET
CONTACT OR VOLTAGE
(factory selected)
SPARE
TERMINAL
LOW BATT.
SCADA
CONTACT
SIGNALLING
SCADA SPARE
CONTACT
EXTERNAL RESET OPTIONS:
SIGNALLING
SCADA
CONTACT
EXTERNAL
FLASHING UNIT

The device continuously checks the earth current.
When the selected trip level is exceeded for
more than the selected delay time, the device
trips: the LED starts ashing and the SCADA relay
gives a pulse signalling, closing the contact for
500ms. If a second fault occurs when the EFI is
already tripped, the SCADA contact will close
again for 500ms to indicate that a second fault
has occurred. The minimum fault duration (delay)
time is designed to discriminate real faults from
simple line transients.
DEVICE TEST: simply press the pushbutton when the device is not ashing. The EFI will start ashing and the
SCADA relay will give a pulse signalling.
DEVICE RESET: After the device has tripped, it can be reset in the following ways:
• Pressing the pushbutton on the front.
• TIME RESET: the EFI will reset automatically when the selected preset time has elapsed.
• REMOTE RESET: closing the contact or remote pushbutton connected to the screw terminals.
• 230Vac MAINS RESET: the EFI will reset when the mains 230Vac is back after the fault restoration. Simply
connect this input to mains 230Vac voltage.
Note: in order to use this reset feature, the 230Vac voltage must disappear when the fault occurs, i.e.
it must be cut off by the MV circuit breaker that breaks the faulty line, otherwise the EFI will reset
immediately after the fault.
Device Options (to be specied in purchase order)
• Screw terminal output to drive the external ashing indicator
• SCADA Changeover Relay: Momentary or Permanent contact
• SCADA Output signalling spare (extra) changeover contact
• Remote reset by DC voltage in range 9-36Vdc
• Low Battery LED indicator in front of the box (amber LED
ashing during EFI test or trip when battery remaining capacity
is lower than 20%)
• Low Battery SCADA signalling changeover contact
OPERATION
Trip current level
Leakage earth current
TRIP (FLASHING)
EFI
Delay
Earth current
EFI reset
EFI.06 Product manual
4 FIXING HOLES DIAM. 5mm
ON A 63.5mm SQUARE ON
THE BOTTOM OF THE BOX
108,5
108,5
63,5
LED LAMP
PUSHBUTTON
CABLE GLANDS

TECHNICAL SPECIFICATIONS
Earth fault trip Current Jumper selectable: 25A, 50A, 100A, 200A (±20%). Factory default 25A.
(current values can be customer dened)
Min. Fault Duration (Delay) Jumper selectable: 40ms, 60ms, 80ms, 160ms (±20ms).
Factory default 40ms. (delay time values can be customer dened)
CBCT Current Transformer Resin, split in 2 halves tied by 4 allen screws.
Internal standard diameter 110mm (CT.01) - option 150mm (CT.03).
Device link with CBCT 5m 2x1sqmm PVC cable. (custom lengths on request)
Visual Fault Signalling Flashing red LED lamp covered with red lens. Ultra bright ash at 1 ash
per second. Visibility in excess of 15m.
Remote Fault Signalling
(SCADA contact)
Changeover SCADA relay contact - Signalling time (pulse): 500ms.
Contact ratings: 1A max, 230Vac, 30W max. (option permanent contact)
Option: SCADA Output signalling spare (extra) changeover contact
Power Supply
Self-powered by internal lithium battery 3,6V - AA type.
10 years lifetime with over 1500 hours ashing time.
Battery can be easily replaced with lithium 3,6V - AA standard type (no
soldering or tools required).
Reset modes
(All features present)
• Automatic after time delay, jumper selectable: 30 min, 1hr, 2hrs or 4hrs
(± 5min). Factory default: 2hrs. (time values can be customer dened)
• When the 230 Vac mains voltage is restored (link cable not provided).
• By the pushbutton placed on the cover.
• By remote NO reset contact (SCADA) or remote pushbutton.
• Option: by remote control DC voltage 9 to 36Vdc
Device Test By the pushbutton placed on the cover.
Environment Device Enclosure IP65 Polycarbonate - Ambient temperature -20 to +55 deg C
OPTIONS
Screw terminal outputs to drive the external ashing indicator.
Low Battery amber LED indicator in front of the box
Low Battery SCADA signalling changeover contact
EFI.06 Product manual
We reserve the right to change the design and specication of any item shown herein,
therefore the contents shall not form part of any contract or constitute a warranty.
EFI.06 Product Manual
rev.5 2/11/2015
C.E.DI.T. Srl - Via G. da Verrazzano, 44 - 10042 Nichelino (TO)
Italy Tel [phone] Fax [phone]
www.ceditnet.it [email protected]