ABB OVB-SDB Manuale utente

Outdoor Vacuum Circuit Breaker - Type OVB-SDB

Instruction for Storage, Installation, Service and Maintenance

INDEX

Sr. No. Title Page No.

PART A: Handling, Storage and Pre-Erection assembly

1.0 Packing legend and handling during transportation

2.0 Storage prior to erection

3.0 Safety provisions and assembly instructions for

Circuit-Breakers with operating device

PART B: Instructions for Erection, Operation & Maintenance.

1.0 General

2.0 Design

3.0 Function

4.0 Erection

5.0 Commissioning

6.0 Maintenance

PART C: Operating Mechanism Working Principle and Maintenance

1.0 Breakers with spring charged mechanism

2.0 Breakers with magnetic actuator mechanism

3.0 Breaker pole

OVB-SDB Failure Report

List Of Drawings

Diagrams and Legends

PART A: HANDLING, STORAGE AND PRE-ERECTION ASSEMBLY

1.0 PACKING LEGEND AND HANDLING DURING TRANSPORTATION

1.1 Packing legend

1.2 Handling during transportation

1.3 Lifting

1.4 Lifting the breaker out of the case

2.0 STORAGE PRIOR TO ERECTION

2.1 General

2.1.1 Receipt

2.2 Operating Mechanism

2.3 Circuit- breakers

2.4 Spare parts

3.0 SAFETY PROVISIONS AND ASSEMBLY INSTRUCTIONS FOR CIRCUIT-

BREAKERS WITH OPERATING DEVICE

3.1 Warning texts

3.3 Unpacking

3.2 Safety Precaution

1.0 PACKING LEGEND AND HANDLING DURING TRANSPORTATION

1.1 Packing legend

- Glass porcelain handle with

care

- Up

- Center of gravity

- Must be protected from

moisture and rain

Fig. A Fig. B

Each case is marked with the case number on at least two sides ( for exports - four

sides) and gross weight on one short side.

Case number and gross weight are painted in black directly on the case. Other

information is written on a plywood disc/label, which is max. 620 x 480 mm with a

standard text height of 20 mm. If not otherwise specified by the customer. This plywood

disk/label is fastened on two sides of the case.

In addition to the above, the cases are marked with the following symbols, in black.

These should be observed when choosing lifting equipment.

1.2 Handling during transportation

The circuit- breakers shall never be transported without packing.

The cases shell be transported in such a way that they:

Do not stand in water.

Are not exposed to damage

Every case must be secured during transport. They must be arranged so that the cases

cannot move in any direction. The speed must be adapted to the road conditions.

Factory packed Breaker should not be stacked one over the other.

1.3 Lifting

Before lifting the case, observe the information on it (such as symbol, weight, etc.). The

cases shall be lifted by a lifting device equipped with forks or slings (see Fig C).

If a crane is used, slings shall be used. The units must not be rolled or dropped.

Fig. C Lifting the case

1.4 Lifting the breaker out of the case

Lifting the breakers out of the transport cases is necessary only just before erection (see

product information kept inside the cabinet). If they are to be stored during some time, see

"Storage Prior to Erection".

2.0 STORAGE PRIOR TO ERECTION

2.1 General

Circuit- breakers intended for outdoor operation are generally delivered in units, which are

designed for transport purpose.

Intermediate storage of these units should be avoided. If it is not possible, then to avoid

intermediate storage, they should be stored indoors or under roof. They must also be

stored on a plane surface above ground level to prevent breaking and water seepage. On

arrival it is important that plastic sheets are removed in order to prevent corrosion by

condensation (except for the spare parts; see separate instructions).

Storage in a humid climate without proper ventilation may lead to discoloration of the

galvanized surface. This discoloration is normally known as " White rust" consisting mainly

of Zinc hydroxide and is a result of a chemical process between the pure zinc on the surface

and moisture.

The long-term corrosion protection is not influenced, since the iron-zinc layer below the

surface remains unaffected. The presence of white rust is no reason for rejection of goods.

On arrival, each unit should be checked in the following way:

Delivery is in accordance with order and delivery documents.

Any damage in delivery, and material loss.

In cases where damage is detected or suspected, the units should be opened and damages

must be photographed. Both damage and shortages should be reported.

In general all material should be stored in an approved storage (Note 1, Page 8). The

ambient air should not be heavily contaminated by dust, smoke, corrosive or combustible

gases, vaporous and salt, otherwise the equipment must be cleaned before erection.

The original transport unit may be used for storage. The coupling joints of the assemblies,

as well as connections, are fitted with transport covers or protective caps, which shall not be

removed till erection.

- Factory packed Breaker should not be stacked one over the other.

The medium voltage circuit breaker type VBF is delivered firmly secured to the floor/ bottom

of their containers or crates and must always be transported or stored with care. The circuit

breaker is transshipped in suitable packing in the contact open position (off) and with closing

spring discharged.

2.1.1 Receipt

Each delivery is to be checked on receipt for,

Completeness and correctness. (Check against order and delivery documents)

Any possible damage in transit and material losses.

Abnormality, if any, must be notified immediately to: ABB, Nasik , forwarding agents

and the insurance company.

2.2 Operating Mechanism

The operating mechanism should be unpacked on arrival. If it is not going to be stored in an

approved storage (Note 1), the heating elements must be connected permanently to the

electric supply to protect the control equipment from corrosion or freezing damage.

2.3 Circuit-Breakers

The breaker should be stored in their original transport units, where they are well protected

from damage. The unit shall be prevented from standing in water. The breakers which are

stored outdoors, should be covered with at least a tarpaulin. The tarpaulin should not be

placed directly onto the galvanized surface. An air gap should be left to prevent

condensation.

The minimum allowed ambient tem perature for the Outdoor Vacuum Circuit Breaker is

-30°C.

2.4 Spare parts

The spare parts shall be stored indoors in an approved storage (Note 1), in their original

units. This is particularly valid for rubber sealing parts, which must also be protected from

sunlight in order to prevent them from ageing. Rubber sealing can be stored only for a

limited period, so avoid storage of these parts. Structures may be stored outdoors.

Note 1: We define an approved storage with:

Roof

Solid ground

Relative humidity less than 50%

Temperature 20°C (± 10° C)

3.0 SAFETY PROVISIONS AND ASSEMBLY INSTRUCTIONS FOR CIRCUIT-

BREAKERS WITH OPERATING DEVICE

Read carefully the entire assembly instruction before starting assembly work.

3.1 Warning texts

Warning texts are stated in 5 different degrees of urgency, which should be carefully

observed. These are described below:

DANGER indicates an immediate risk situation that can lead to

death or serious personal injury if not avoided.

Warning indicates a risk situation that can lead to death or

serious personal injury if not avoided.

Caution indicates a risk situation that can lead to small or

moderate damage.

Note is used when there is danger that can lead to equipment

damage only

Important indicates an operation or a suggestion for handling

DANGER

Warning

Caution

Note

Important

3.2 Unpacking

Place the case horizontally on a flat surface before opening the cover.

Check that all parts are included in the delivery. Check the packing list.

Check that no parts have been damaged during transport; especially the porcelain

insulators.

Report any faults immediately to the ABB representative.

3.3 Safety Precaution

When working on high-voltage circuit breaker the below-mentioned risk must be taken into

consideration and corresponding safety measures taken.

RISK SAFETY MESAURES

1) Work next to high voltage Warning plate is placed inside the

door of the operating device.

Disconnect the supply and earth near

the workplace. If work must be

carried out near energized parts of

the plant, it has to follow local safety

regulation of the organization

responsible for the circuit breaker.

2) Work on ladders and platforms The work shall follow the directions

of the authority for occupational

safety and health. Avoid work in

severe weather conditions, which

entails a great deal of climbing for

short periods.

3) Work with low- voltage.

Both D.C. and A.C. voltage

may be drawn to the operating

device.

4) Risk in operating mechanism

and link system

The spring operated device has

energy stored in the opening

spring, when it is in charged

condition. The device can be

activated by heavy vibrations or

unintentional, slight touch on

mechanical latch parts.

5) Work on pressurized porcelain

Insulators.

Normally, the work pressure is

up to 1.2 bar absolute. Damages

in the porcelain can cause risk of

the porcelain breaking.

Do not connect control or heating

voltage until all connection work is

completed.

Warning plate is placed on the

supporting frame.

No work must be carried out unless

the closing and opening springs are

discharged, the circuit-breaker is in

position OFF “0” and the supply to

the motor is disconnected.

The operating mechanism must not

be operated unless it is connected to

the circuit

Work close to the insulators of the

circuit breaker that entails risk of

porcelain damage must not be

carried out until the gas pressure has

been lowered to 1.0 bar absolute

pressure.

PART B: INSTRUCTION FOR ERECTION, OPERATION & MAINTENANCE

1.0 General

1.1 Type designation

1.2 Specifications

1.3 Weight of the Circuit Breaker

2.0 Design

2.1 Breaker Pole

3.0 Function

3.1 Switching operations

3.2 Closing operation

A. Spring operated mechanism

B. Magnetic Actuator

3.3 Opening operation

A. Spring operated mechanism

B. Magnetic Actuator

4.0 Erection

4.1 General

4.1.1 Preparations

4.2 Erection procedure

4.3 High voltage connection

4.4 Low voltage connections

4.5 Earthing

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