Earthing Confirmation Relay 1



Earthing Confirmation Relay

It is a solution for the Engineers and safety professionals at plant who work long and hard ensuring elimination of the possibility of fires of explosions in areas where flammable or combustible material are being processed, handled or stored. This involves identifying all potential ignition sources-whether electrical, hot surfaces, mechanical sparks or naked flames.

However, no matter how well the working environment has been designed, there’s one potential source of spark discharges that’s ever present in virtually every workplace and that has enough energy to ignite all common flammable or combustible liquid vapours and gases as well as many airborne dusts and loose solid materials. That energy source is “Static Electricity”, also known as “Electrostatic” or just simply “Static”. Here we present our product as “Earthing Confirmation Relay”.

OPERATION PROCEDURE

A quick summary of the sequences of operations of the ECR-1 is as follows

  • There are two porbes from the EarthingRelay : P1 and E2. The intrinsically safe grounding circuit of the Earthing Relay is well protected and designed to discharge static charge in several kilo-volts.
  • Probe E2 (Black clamp) must first be clamped to the vehicle.
  • The charge on the vehicle is carried through E2 to Ground (Earth terminal of the instrument). It is essential that the instrument be properly earthed.
  • After the static charge is grounded, the Probe P1 (Black clamp) should be connected to the Vehicle (after about 2-3 seconds).
  • If the vehicle is fully grounded the potential difference between the two probes P1 and E2 will be near-zero and the Relay will change state and the loading may be commenced.
  • However, in the unlikely event that the vehicle does not get fully discharged through E2 and P1 is also clamped to the vehicle, then the charged will appear on P1 also and the slow-Glow Fuse F3 series with P1 will blow out, causing the instrument to stop functioning immediate (Red Power ON LED will go Off).
  • There are three protection fuses within the instrument. Hence, if (1) either the Grounding path inside the instrument gets “open”, or (2) if intrinsic sage circuit gets damaged internally for any reason, or (3) if there is a short in the power supply section, the corresponding fuses will blow and the Power On LED will immediately go off.
APPLICATION DRAWING