Relay operates for 1 phase, 2 phase and 3 phase fuse failure in the supervised circuits and for an interruption in any of the cables or their associated fuses.
When a fuse blows, the relay operates fast enough to inhibit the undesired operation of high speed distance relays.
Uses the principle of instantaneous amplitude comparison of two voltages used for Fuse failure relay.
This is achieved with two voltages , one before the fuse and the other after the fuse.
Under normal operating conditions, the two voltages give rise to zero resultant voltage, thus no operation of Fuse failure relay.
When the fuse blows out, the neutralizing effect is lost, hence Fuse failure relay operates.
Width of maximum right of way permitted as per forest conservation act ‘1980 and its subsequent amendment dated 25 th October, 1992, are as per Table 1. Researches are being carried out for further optimizing the Right of Way. Guidelines of forest environmental rules shall be followed to avoid excessive tree cutting i.e. all the trees should be cut from root level in the 3 m corridor below each line conductor / earth wires. In the balance corridor, trees branches are only to be lopped to attain the specified clearance as per Table 1. Table 1 – Guidelines for Right of Way as per forest conservations act 1980 and subsequent amendment dated 25 th October, 1992 Line voltage (kV) 66 110 132 220 400 500 HVDC 765 Row width (Meter) 18 22 27 35 52 52 85 Electrical clearance: Electrical clearance while power lines crossing each other. In case of power line crossings, minimum clearance between lowest conductor of line and ground wire / top conductor of ...