Non-Cooperative Type Instruments and Train Detection

<p>Two shunting keys, one for each line, interlocked with block instruments. (D)</p> Signup and view all the answers

<p>Upon the passage of a train to ensure safety. (B)</p> Signup and view all the answers

<p>Single Line Token less Block Instrument Handle type. (A)</p> Signup and view all the answers

<p>1.5 km (B)</p> Signup and view all the answers

<p>Any other block instrument (C)</p> Signup and view all the answers

<p>A control mechanism. (C)</p> Signup and view all the answers

<p>Single Line Token instrument (Neal's) (A)</p> Signup and view all the answers

<p>PVC insulated quads (C)</p> Signup and view all the answers

<p>Universal Fail Safe Block Interface (UFSBI) (D)</p> Signup and view all the answers

<p>Surge arrestor (D)</p> Signup and view all the answers

<p>Any other circuit (C)</p> Signup and view all the answers

<p>To work Block Telephone and Block Bell circuits (C)</p> Signup and view all the answers

<p>Block filter and block bell insertion (D)</p> Signup and view all the answers

<p>On pot-head insulators (D)</p> Signup and view all the answers

<p>Must be run in troughing or suitable trunking (A)</p> Signup and view all the answers

<p>An approved type block interface must be provided (B)</p> Signup and view all the answers

<p>It must not exceed 150 V (D)</p> Signup and view all the answers

<p>In sloping upward manner or with drip loops (D)</p> Signup and view all the answers

<p>A separate cable should be provided for each instrument circuit (A)</p> Signup and view all the answers

<p>430 V (B)</p> Signup and view all the answers

<p>Separately from the Block Instrument (A)</p> Signup and view all the answers

<p>It must be linked to the common ring earth of Indoor Signalling system. (C)</p> Signup and view all the answers

<p>During the operation of the plunger. (B)</p> Signup and view all the answers

<p>To ensure reliability in cases of stray DC presence. (A)</p> Signup and view all the answers

<p>Not less than 18 mA and not more than 25 mA. (D)</p> Signup and view all the answers

<p>Only approved types should be used. (C)</p> Signup and view all the answers

<p>They should be securely fixed to the table. (A)</p> Signup and view all the answers

<p>They should have distinctive tones. (A)</p> Signup and view all the answers

<p>150-ohm resistors. (B)</p> Signup and view all the answers

A system that automatically sets instruments to 'Train On Line' when a train enters a block section and maintains it until the train passes the receiving Home Signal.

A warning sound to the receiving station when a train enters a block section at the sending station.

Two keys used for shunting authority in a block section, one for each line.

Equipment used to confirm a block section is clear using track circuits or axle counters.

Device in a block station that shows whether a block section is occupied or not.

Signal that automatically switches 'On' with train passage and stays on until the train clears the block.

Signal that automatically switches 'ON' when a train passes through indicating that the block is clear.

A type of instrument that was used to control train movement on single-line tracks, but is being phased out.

A type of block instrument used when transitioning from an electrified section to a non-electrified section, with a maximum parallelism length of 1.5 km.

A specific block instrument type for double-line railway operations.

Block operation utilizing axle counter devices, potentially enhancing safety and efficiency on double-line systems.

A method of verifying block system accuracy using axle counters, ensuring train movement authorization.

Block signal operation using a direct electrical method (e.g., electronic interlockings), ensuring train clearances and authorization.

Specialized insulated cables for block instrument wiring, essential for safety and signaling.

A standardized interface for block systems using fiber optic or radio communication, guaranteeing safety and reliability.

A critical safety feature of block signaling systems consisting of chokes, a condenser, and an arrestor that protects the system from surges in faulty conditions

Protective earth for all block equipment must be connected to the common ring earth of the indoor signalling system.

In areas with earth return, the instrument's rest contact is replaced by a slow-release relay, energized during plunger operation, but releasing only after safe condenser discharge.

When stray DC is present, metallic return is used for the block circuit, employing a modified filter circuit without the condenser.

The filter circuit is modified to eliminate the condenser when stray DC is present.

IRS type block instruments with block filters are used for double line electrified sections with 25 KV AC.

Battery voltage should ensure a current between 18 mA and 25 mA flowing through the polarized relay.

Block instruments must be of an approved type, mounted on a sturdy fixture, secured in place.

Where multiple block instruments are in the same room, each should have unique bell tones/buzzers.

Wires connecting adjacent block sections to the building; must be insulated or spaced apart for safety.

Insulators used to terminate insulated line wires, preventing electrical shock and ensuring safe connection to the building.

A loop in the line wire that prevents rainwater from flowing into the building, protecting against water damage and electrical hazards.

Wires inside the building; must be run in a protected enclosure like troughing to prevent interference from other circuits.

Wires connecting the pot-head insulator to the test panel; must be separated from other circuits.

To protect block instruments from lightning strikes and ensure reliable operation even during storms.

Induced voltage from parallel power lines must be kept below 150V, and short-circuit currents below 430A, as per CCITT guidelines.

To prevent interference between circuits, allowing for independent operation and reliable data transmission.