ABB OVB-SDB User manual

Outdoor Vacuum Circuit Breaker - Type OVB-SDB
Instruction for Storage, Installation, Service and Maintenance

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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
4
5
7
9
11
13
15
15
17
19
22
25
26
37
39
41
47
48

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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

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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.

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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".

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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.

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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)

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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.

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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.

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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