THE EEFI Model ‘RR’ The Bowden range of Electronic Earth Fault Indicators (EEFI) have been found invaluable in assisting distribution engineers in identifying faulted cable sections on 11 kV cable networks. The EEFI Model PR’ was developed for the EF indication associated with the automation of HV cable networks and has now completed further research and development work to include full EMC compliance.

• PUSH BUTTON TEST and RESET FACILITY
• BRIGHT FLASHING LIGHT ALARM and TELECOM ALARM RELAY
• RESETS after 3 hours and can be REMOTELY RESET
• LONG LIFE LITHIUM BATTERY POWER
• ENCAPSULATED ELECTRONICS
• QUICK and SIMPLE to INSTALL
• EMC Testing - Exceeding Generic Standards

The front panel of the EEFI module displays a red, high brightness LED for alarm indications and sealed push buttons for manual alarm and reset operations.

Flashing Lamp Alarm
The high brightness LED flashes when the EEFI is alarmed by the current imbalance caused by a down-stream system fault. It will continue to flash for 3 hours, when it will reset automatically, (optional 6 hours) or until the remote reset function is operated, whichever occurs first.

Remote Reset
The remote reset function is only operative if the Reset Terminals within the instrument enclosure are either connected to ‘pulse’ the local low voltage supplies via a suitable step down transformer or connected to a regional telemetry/SCADA system. A 240v reset version is also available. The alarm circuit can also be restored to the alert mode by pressing the reset button on the front panel of the EEFI.

Internal Connector Blocks

External telecom and CT cables are brought to the EEFI internal connector block through suitable cable glands which maintain the P rating of EEFI enclosure.

There are three clearly labelled internal connector blocks for connections to the CT secondary, telecom alarm output and the remote reset facility.


Specification
Module enclosure: :- Polycarbonate material sealed to 1P65 with a sprayed internal metallic screen of silver plated copper granules
LED alarm ::- High brightness low current LED.
Encapsulant ::- Polyurethane flexible
Power source::- Lithium Thionyl Chloride cell - size AA, 3.6V, 1 .8Ah
Battery capacity: :- 360 flashing hours
Battery life ::- 8 - 10 years (200C nom) or 360 hours cumulative operation time
Operating temperature : -250C to +600C
Trip current: :- 35A within the range 20A to 50A
Reset time::- 3 hours +1- 15 mm (optional 6 hours)
Alarm relay : :- Single changeover latching relay (NC + NO + Common)
Reset input : :- 6 - 30V a.c. or d.c. pulse
When ordering please state:

1 Reset time if different to standard 3 hours

2 Type of C.T. required with module (split or solid)

3 Box drilling and fixing requirements of module

Specification subject to change without notice