Explosion Protection Safety Guidelines

Questions and Answers

What is the purpose of the temperature monitoring system in the oil compartment?

To monitor the temperature of the insulating fluid (correct)

To change the direction of oil flow

To regulate the flow of insulating fluid

To enhance the conductivity of the insulating fluid

Which component is responsible for changing the direction of drive motion from vertical to horizontal?

Bevel gear (correct)

Drive shaft

Coupling bracket

Insulating fluid

How is the drive shaft constructed as per the provided information?

Composed of a square tube with brackets and bolt couplings (correct)

Using a hollow round tube

From a single solid piece of metal

Made of flexible material for ease of movement

Where is the vertical drive shaft located within the system?

Between the drive and bevel gear Signup and view all the answers

What connects the drive shaft to the mechanical components?

Coupling brackets and bolts Signup and view all the answers

What is the primary function of an on-load tap-changer in a transformer?

To adjust the transformer's transmission ratio to meet operating requirements Signup and view all the answers

What is the main role of the drive shaft in the system?

To provide a mechanical connection Signup and view all the answers

Which part is located between the bevel gear and the tap-changer?

Horizontal drive shaft Signup and view all the answers

Which component provides the control impulse to the motor-drive unit for changing the position of the on-load tap-changer?

The voltage regulator Signup and view all the answers

What is NOT a function of the temperature monitoring system?

Controlling the insulating fluid flow Signup and view all the answers

In the context of the described system, what role does the upper gear unit play?

It connects the motor-drive unit to the tap-changer Signup and view all the answers

What is likely the consequence if an on-load tap-changer fails to operate correctly?

Improper voltage regulation and potential damage to the transformer Signup and view all the answers

Which component is directly linked to the active part of the transformer?

The on-load tap-changer Signup and view all the answers

What does the horizontal drive shaft of the on-load tap-changer primarily do?

It transmits torque to the bevel gear based on motor impulses Signup and view all the answers

What should be done if safety markings on the product are damaged or missing?

Replace the damaged or missing safety markings. Signup and view all the answers

Which of the following is a correct action regarding auxiliary materials?

Only using manufacturer-approved lubricants and auxiliary materials is recommended. Signup and view all the answers

In what condition can the product be safely operated?

Only under the specific ambient conditions specified in the technical data. Signup and view all the answers

What is the primary risk of installing the product in an area with explosive gases or vapors?

It can lead to severe explosions and risk to life. Signup and view all the answers

Which of the following behaviors could lead to malfunctions of the product?

Using unapproved auxiliary materials and fluids. Signup and view all the answers

What is the importance of safety markings on the product?

They are crucial for maintaining safety protocols. Signup and view all the answers

What should be done if the product is to be used in an environment with a risk of explosion?

Consult the manufacturer for recommendations. Signup and view all the answers

What type of hoses and pipes should be used when operating the product?

Only those approved for flammable liquids. Signup and view all the answers

What is the maximum permissible axial offset for the drive shaft with cardan joints without an insulator?

20° Signup and view all the answers

What is the minimum length required for configuration with an intermediate bearing when using a drive shaft with cardan joints without an insulator?

798 mm Signup and view all the answers

Which configuration requires the longest minimum length for a drive shaft with cardan joints?

Middle of hand crank – middle of bevel gear with insulator Signup and view all the answers

Which statement is true regarding the OF 100 oil filter unit?

It cleans and dries the fluid using a combined filter insert. Signup and view all the answers

What happens to the requirement for an intermediate bearing when the length of V1 exceeds 2564 mm?

An intermediate bearing is required. Signup and view all the answers

What is the minimum length required for a drive shaft configuration to have an intermediate bearing if the length of V1 is greater than 2772 mm?

978 mm Signup and view all the answers

Which of the following configurations has the greatest minimum length for the drive shaft with cardan joints?

Drive shaft with insulator Signup and view all the answers

What is the purpose of the paper filter insert in the OF 100 oil filter unit?

To clean the insulating fluid Signup and view all the answers

What is the consequence of tap-winding connecting leads being situated too closely to the change-over selector's moving parts?

Damage to the on-load tap-changer Signup and view all the answers

What is the design specification for the (+) and (-) change-over selector connection contacts?

Connecting lugs with through-holes for M10 screws Signup and view all the answers

What precaution is recommended when fastening tap-winding connecting leads to the change-over selector?

Ensure fittings cannot come loose or settle Signup and view all the answers

What components are not included in the scope of delivery for the change-over selector connection?

Cable shoes and fastening materials Signup and view all the answers

What must be considered when installing the connection contact K for the tap selector?

It requires through-hole fastening for M10 screws Signup and view all the answers

What type of insulation is specified at the beginning of the connection process?

3 mm paper insulation Signup and view all the answers

Which of the following is true regarding the change-over selector connection?

The leads must be kept at a sufficient distance from mechanical parts Signup and view all the answers

What type of screws are specified for fastening the connection contact to the change-over selector?

M10 screws Signup and view all the answers

The motor-drive unit changes the transmission ratio of the transformer by adjusting the on-load tap-changer.

True Signup and view all the answers

The active part of the transformer is located within the transformer tank.

False Signup and view all the answers

The bevel gear is situated above the upper gear unit in the configuration of the on-load tap-changer.

False Signup and view all the answers

An on-load tap-changer is always connected to the protective relay.

False Signup and view all the answers

The vertical drive shaft operates independently from the horizontal drive shaft.

True Signup and view all the answers

A key component of the on-load tap-changer's functionality is the oil conservator.

False Signup and view all the answers

Pipe connection S includes a vent screw and cannot be connected to a drain valve.

False Signup and view all the answers

The on-load tap-changer can be completely emptied via pipe connection Q.

False Signup and view all the answers

Pipe connection R is intended for the attachment of the protective relay.

True Signup and view all the answers

Pipe connection E2 is sealed off with a blank cover and leads directly into the oil tank.

True Signup and view all the answers

The purpose of pipe connection E2 includes equalizing pressure between the transformer tank and oil compartment.

True Signup and view all the answers

The serial number of the on-load tap-changer is located on the transformer body.

False Signup and view all the answers

Pipe connection R can only be used with pipe connection Q in a specific configuration.

False Signup and view all the answers

Pressure equalization is essential for filling with insulating fluid in the oil compartment.

True Signup and view all the answers

Exceeding the rated step voltage Uir by up to 10% is always prohibited regardless of the step capacity PStN.

False Signup and view all the answers

Inappropriate use of the product includes operating it under specified design data conditions.

False Signup and view all the answers

Prohibited operating conditions can arise from short circuits or inrush current impulses.

True Signup and view all the answers

Higher voltages occurring from transformer overexcitation are permissible under all circumstances.

False Signup and view all the answers

Taking suitable measures can help prevent operations outside the permitted operating conditions.

True Signup and view all the answers

All transformers electrically connected in series are exempt from the issues caused by inappropriate operating conditions.

False Signup and view all the answers

Inappropriately using the product can lead to injury of persons and damage to the product itself.

True Signup and view all the answers

The design data provided in the order confirmation can be ignored if the product appears to function correctly.

False Signup and view all the answers

The selector's pitch of tap selector contact circle is 36 mm.

False Signup and view all the answers

The two coupling parts must be positioned according to the adjustment plans supplied.

True Signup and view all the answers

The red protective cap should remain on the 0-bar of the change-over selector until installation is complete.

False Signup and view all the answers

Unsecured screw connections can lead to enhanced performance of the on-load tap-changer.

False Signup and view all the answers

There are four holes in the selector base for securing the selector to prevent twisting.

False Signup and view all the answers

The specified tightening torque must be ignored during installation to prevent over-tightening.

False Signup and view all the answers

The tap-selector connecting leads must be carefully screwed to the connecting piece.

True Signup and view all the answers

The selector's connection can only slide axially in one particular direction.

False Signup and view all the answers

Clamping washers are not necessary to secure fittings and prevent them from coming loose.

False Signup and view all the answers

The external appearance of the change-over selector connection contacts differs from that of the tap selector contacts in a multiple coarse tapping arrangement.

False Signup and view all the answers

Tap-winding connecting leads should be routed closely to the change-over selector's moving parts to minimize space.

False Signup and view all the answers

Screws used for fastening the tap-winding connecting leads should be horizontal in position.

False Signup and view all the answers

The screening caps should be open while securing the fittings.

False Signup and view all the answers

The distance between tap-winding connecting leads and change-over selector's moving parts is not crucial for the system's functionality.

False Signup and view all the answers

Fastening the tap-winding connecting leads to the change-over selector can be done without referring to the connection diagram.

False Signup and view all the answers

The screw head and nut must be partially covered for optimal fitting.

False Signup and view all the answers

Study Notes

Explosion Protection

Highly flammable or explosive gases, vapors, and dusts pose significant explosion and fire hazards.
Installation, operation, or maintenance in explosion-risk areas is prohibited.

Safety Markings

Safety markings include warning signs and information plates, crucial for safety.
All safety markings must be observed, remain intact, and be legible.
Damaged or missing safety markings should be replaced immediately.

Ambient Conditions

Reliable and safe operation requires adherence to specified ambient conditions.
Follow technical data for operating conditions and installation requirements.

Auxiliary Materials and Operating Materials

Non-approved auxiliary or operating materials can lead to personal injury and equipment failure.
Only manufacturer-approved insulating fluids and grounded equipment for flammable liquids must be used.
Manufacturer-approved lubricants and auxiliary materials are essential for safe operation.

On-load Tap-changer Functionality

On-load tap-changers adjust the transformer’s transmission ratio using a motor-drive unit controlled by a voltage regulator.
The device is integral to transformer operation, connecting to the active part.

Product Components Overview

Main components include transformer tank, motor-drive unit, drive shafts, bevel gear, on-load tap-changer, protective relay, oil conservator, and more.

Temperature Monitoring

A temperature monitoring system is in place to oversee insulating fluid conditions in the oil compartment.

Drive Shaft Functionality

The drive shaft connects the drive to the on-load tap-changer, changing motion from vertical to horizontal via a bevel gear.
The design includes coupling brackets and bolts to ensure secure connections.
Configurations vary based on lengths and the need for intermediate bearings.

Drive Shaft Variants

Drive shafts equipped with cardan joints can be designed with or without insulation.
Specific measurements for installation (V1 min) are linked to axial offsets permitted.

OF 100 Oil Filter Unit

The OF 100 unit cleans and dries the insulating fluid of on-load tap-changers through paper filter inserts.

Change-over Selector Connection

Ensure tap-winding connecting leads are adequately distanced from moving change-over selector parts to prevent damage.
Change-over selector connection contacts are designed for M10 screw connections, allowing for electrical reversibility.

Mounting Guidelines

Tap-winding leads must be fastened according to the provided connection diagram.
Ensure fastenings are secure to avoid loosening during operation.

Safety Considerations

Allowance for rated step voltage Uir to exceed by up to 10% temporarily, as long as rated step capacity PStN is not surpassed.
Inappropriate use includes operating conditions outside specified design parameters; adherence to guidelines is essential for safety.
Prohibited conditions include those arising from short circuits or inrush current when energizing transformers, posing risks to personnel and equipment.
Adequate measures must be implemented to prevent operations outside permitted conditions.

Product Description

The on-load tap-changer operates connections with key components including:
- Transformer Tank
- Motor-Drive Unit
- On-load Tap-Changer
- Active Part of Transformer
Pipe connections for oil management:
- Pipe connection S allows for complete emptying via a drain valve.
- Connection R links to the protective relay; can serve interchangeably with connection Q.
- Connection E2 is used for pressure equalization and can connect to a Buchholz relay, ensuring adequate functioning during transformer operations.

Mounting Instructions

Proper tightening torques and securing screw connections are critical to avoid damage; follow specified guidelines.
Care should be taken when connecting parts of the tap-selector to prevent incorrect fittings and ensure stability.
The selector base includes holes for securing; must allow axial movement while preventing twisting.
Each connecting lead should be fixed to avoid loosening, reflecting best practices in assembly and installation.

Change-Over Selector Connection

Protect the change-over selector against obstructions from tap-winding connecting leads to avoid blockage and potential damage.
Ensure that connecting leads are routed away from moving parts to maintain functionality of the tap-changer.
Identification and correct fastening of connections are crucial for operational integrity when handling multiple coarse tapping arrangements.

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Description

This quiz focuses on the essential safety guidelines for handling highly flammable or explosive gases, vapors, and dusts. Understand the risks and safety procedures necessary to prevent potential explosions and protect life and property. Ensure you are aware of proper installation, operation, and maintenance practices in hazardous areas.