Astronomical Timer

The astronomical timer enables switching on and off of lighting loads at precise sunrise and sunset timings for geographical locations. Latitude and Longitude information is entered by using DIP switch settings and the information is programmed for all the cities in India (Data for other countries can be added as per user requirements). A high accuracy RTC is used along with battery backup to maintain timing.
DIP Settings:
DIP 1: Off Time Selection
DIP 2: State Selection
DIP 3: City Selection
Technical Specs:
Operating Voltage: 230V AC Single Phase
Clock Accuracy: ±0.5 sec/day
Battery Backup: >5 Years with Lithium Battery (used only in absence of AC power)
LED Indication: Red Coloured Status LED
Relay Contact Type: 1 Normally Open SPST Contact
Relay Contact Rating: 16A
DIN Rail/Panel Mountable Enclosure

Astronomical Timer controls time based operations without using any sensors and they are most suitable for the lighting applications. Any alternate solutions using sensors tend to fail in due course of time because of accumulation of dirt over the sensor. The timer operates as stand alone and assures a trouble-free operation for a very long time.

Earth Fault Indicator

The Earth Fault Indicator (EFI) is a equipment that measures the Earth Fault Current in a 11kV transmission system by using a Split-Core Current Transformer and raises an alarm when the current is over a preset limit. The EFI has Isolated I/O contacts suitable for connection to the SCADA system via Field/Remote Terminal Units. The EFI is powered by a single Lithium Battery and is of Ultra Low Power Design to ensure a battery life of 10+years.

The EFI has two components; the Detection and Signalling unit and the Current Transformer:

The Detection and Signalling unit is a stand-alone battery powered system which monitors the signals from the current transformer and triggers an alarm if the value exceeds a set limit. The unit gives visual indication with a high powered LED which is visible for long distances even in daylight. The triggered alarm can be reset manually using a push-button, through signals from a SCADA connected terminal unit or automatically after the elapse of a set timing. The EFI has user configurable settings for Trip Current Value, Trip Current Duration, Alarm Auto-reset time and 230V AC sensing.

The Current Transformer (CT) is a Core-Balance type Split-core current transformer with suitable insulation that can be easily mounted over 11kV cables without need for breaking the line. The CT is suitable for outdoor operation and can withstand being submerged in water for prolonged periods of time. The CT is designed to saturate during heavy earth faults to protect the EFI from damage. The Current rating and diameter of the CT can be modified as per customer requirements.


Field Terminal Unit

The Field Terminal Unit (FTU) is a Miniature RTU System used for monitoring and control of Earth Fault Indicators, Circuit Breakers and Relays in Distribution Sub-stations to assist in fault locating, sectionalizing and restoring of the power supply.

The FTU communicates to the Master SCADA System via a GSM Modem and relays the input status data in real-time. The FTU also accepts the control signals from the SCADA System for the outputs and reflects the same in real time.

The FTU is of modular design to enable easy maintenance and upgradability. All the Modules are Mounted on standard 35mm DIN rails inside a rugged IP54 Certified Metal Panel suitable for Outdoor Installation in Hot Tropical Climate.

FE exports FTUs to eastern countries from 2016 onwards.

FE already delivered a few thousands of these FTUs. Here, you can see a batch of FTUs ready for pick up at our office.

FTUs were ready for pick up.