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ElectricalPower System
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Which form would be fill out to get a shutdown permit to work?

A

Reservation form

B

Application form

C

Requisition form

D

None of above

Correct Answer

тЪЩя╕П TE тАв Technical Concept & PrincipleElectricalPower System
Option C

Requisition form

Quick Summary:

A shutdown permit, also known as a 'Permit to Work' (PTW), is a formal document used in electrical and industrial systems to ensure that equipment is safely isolated and de-energized before maintenance begins. To initiate this safety procedure, a 'Requisition form' must be submitted to the authorized control authority to request the shutdown.

тЪЩя╕ПTETechnical SolutionConcept & Principle
ЁЯТб Explanation

A shutdown permit, also known as a 'Permit to Work' (PTW), is a formal document used in electrical and industrial systems to ensure that equipment is safely isolated and de-energized before maintenance begins. To initiate this safety procedure, a 'Requisition form' must be submitted to the authorized control authority to request the shutdown.

ЁЯФв Key Formulas

Psafe=V├ЧI├ЧcosтБб╧ХP_{safe} = V \times I \times \cos \phiPsafeтАЛ=V├ЧI├Чcos╧Х тАФ where PsafeP_{safe}PsafeтАЛ represents the condition of zero power transfer during maintenance

тЪЩя╕П Working Principle

The requisition acts as an official request for isolation. Upon review by the system controller or safety officer, the equipment is isolated (lockout/tagout), tested for dead status, and then a Permit to Work is issued. This process ensures that energy sources are effectively disconnected and protected against accidental re-energization during maintenance.

ЁЯУМ Key Points
  • тЦ╕

    The Requisition form is the formal request document submitted by the maintenance team.

  • тЦ╕

    A Permit to Work (PTW) is a legal document that authorizes specified persons to carry out work in a potentially hazardous area.

  • тЦ╕

    Isolation verification, including earthing, is mandatory before the permit becomes active.

  • тЦ╕

    Effective documentation prevents accidental re-energization of electrical circuits.

тЬЕ Advantages
  • тЦ╕

    Ensures safety of personnel by isolating electrical hazards

  • тЦ╕

    Establishes legal accountability for maintenance tasks

тЭМ Disadvantages / Limitations
  • тЦ╕

    Increases administrative overhead

  • тЦ╕

    Can delay emergency repair timelines

ЁЯЫая╕П Applications / Uses
  • тЦ╕

    High Voltage substations

  • тЦ╕

    Power plant equipment maintenance

  • тЦ╕

    Industrial grid operations

ЁЯУД Additional Information
  • тЦ╕

    In large industrial setups, the 'Requisition' is often logged into a Safety Management System (SMS).

  • тЦ╕

    Option A (Reservation form) is typically used for room or facility booking, not safety.

  • тЦ╕

    Option B (Application form) is a generic term often used for HR or recruitment purposes.

ЁЯУК Diagram / Illustration
Electrical Shutdown Procedure1. Submit Requisition2. Isolation & SafetyCheck3. Issue Permit to Work
тЬЕ

C is correct тАФ The Requisition form is the document used to request the isolation of equipment, which precedes the issuance of a formal shutdown permit.

Core Concepts Used
Click any tag to open in AI Tutor
Electrical Safety Procedures Lockout Tagout (LOTO) Work Permit Systems
ЁЯТб EXAM TIP

Always remember that in electrical power systems, technical documentation like the Requisition form is just as critical as the physical safety equipment (e.g., earthing leads and circuit breakers).

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