ABB SF6 LTB 245E1 BLG 1002A User manual

Product Manual

1HSB435416-2 en Rev 1

LTB 245E1

BLG 1002A

3-pole operation

1

2

4

3

5

6

7

8

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11

10

ABB Switchgear AB

S-771 80 LUDVIKA

PRODUCT MANUAL

PRODUCT DESCRIPTION

- Circuit-Breaker

PRODUCT DESCRIPTION

- Operating Mechanism

ASSEMBLY INSTRUCTIONS

CHECKLIST

OPERATING AND MAINTENANCE

INSTRUCTIONS

LUBRICANTS

MAINTENANCE INSTRUCTIONS

- Operating Mechanism

OVERHAUL INSTRUCTIONS

- Circuit-Breaker

SPARE PARTS

- Circuit-Breaker

SPARE PARTS

- Operating Mechanism

ABB Switchgear

SF

6

Circuit-Breaker LTB 245E1 with operating

mechanism BLG 1002A

3-pole operation

1HSB435455-2 enrev1

Product Description

The information in this document is subject to alteration without prior notice and should not be regar-

ded as an undertaking from ABB Switchgear AB. ABB Switchgear AB takes no responsibility for errors

that can occur in the documentation.

ABB Switchgear AB is not responsible for damage incurred due to the misuse of this document.

The document, or parts thereof, may not be reproduced or copied without prior permission from ABB

Switchgear AB. It may not either be imparted to third party or otherwise be used without authorisation.

Infringement hereof will be subject to action in accordance with applicable laws.

Article number: 1HSB435455-2 enrev1

Date: 2000-08-07

Product Description

1HSB435455-2 enrev1 i

LIST OF CONTENTS

1. Description.......................................................................... 1

1.1 Design of the circuit-breaker.......................................................... 1

1.2 The circuit-breaker’s gas system.................................................... 2

1.3 Operating mechanism..................................................................... 3

1.4 Standards........................................................................................ 3

Product Description

Description

1HSB435455-2 enrev1 1

1. Description

High voltage circuit-breaker type LTB 245E1with a single operating mechanism

type BLG 1002A.

1.1 Design of the circuit-breaker

The circuit-breaker is made up of three separate poles. These consist of three main

parts. At the bottom is an operating mechanism in an alloy housing, above this are

hollow post insulator through which the operating insulator runs and at the top is the

breaking unit. The poles are interconnected by pull-rods enclosed in a protective

tube.

Each breaking unit consists of a breaking chamber insulator, which together with an

upper and lower ﬂange makes up the enclosure, and upper and lower current paths

and a contact system. The puffer runs on the outside of the lower current path. The

ﬁxed contacts are integrated in the upper current path and the lower section of the

puffer.

The poles are mounted on separate hot-dipped galvanised column frames. The

frame consists of two welded formed plate halves, which are interconnected with

bolted cross stays.

Figure 1-1. Circuit-breaker type LTB 245E1, 3-pole

Weights of component parts:

Item Part Weight, kg

1 Circuit-breaker pole See dimension drawing

2 Operating mechanism 465

3 Frame 86-200

1

2

3

B1

0085

Description

Product Description

2

1HSB435455-2 enrev1

1.2 The circuit-breaker’s gas system

The circuit-breaker poles are permanently ﬁlled with SF

6

gas at a pressure of

0.7 MPa abs at 20°C on circuit-breakers whose performance is limited by a lowest

ambient temperature of ≥ -30°C.

On circuit-breakers whose ambient temperature is ≥ -40°C the circuit-breaker is

ﬁlled to a pressure of 0.5 MPa abs at 20°C. On circuit- breakers whose ambient

temperature is ≥ -55°C the circuit-breaker is ﬁlled with a mixture of SF

6

gas and N

2

gas or CF

4

gas at a pressure of 0.7 MPa abs at 20°C. The poles are ﬁtted with

density monitors to monitor the pressure.

1.2.1 Opening and closing

The circuit-breaker poles work according to the Auto-Puffer

TM

- principle with a

puffer cylinder (1) divided into two chambers. An Auto-Puffer

TM

section (2) and a

compression section (3).

When the normal operating currents are cut

the SF

6

gas is compressed in the

compression section to an over-pressure.

When the arcing contacts part, the gas in

the compression section ﬂows out and

extinguishes the arc at the passage trough

zero.

When the short-circuit currents are cut the

requisite extinguishing pressure is built-up

in the Auto-Puffer

TM

section by heating the

arc. In this way a pressure increase is

achieved with energy from the arc and no

extra energy is required from the operating

mechanism.

On closing the puffer cylinder slides

upwards, the contacts engage one another

and the puffer cylinder is reﬁlled with gas.

Figure 1-2. Circuit-breaker pole in the Close position.

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2

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B10097

Product Description

Description

1HSB435455-2 enrev1 3

1.3 Operating mechanism

LTB circuit-breaker is operated by a motor-charged spring operating mechanism

type BLG.

The operating mechanism is connected to the poles’ mechanism on the circuit-

breaker pole via a pull-rod system.

The circuit-breaker is closed by the operating mechanism, which houses the closing

springs. On closing, the opening springs are tensioned, which are permanently

coupled to the poles’ operating mechanisms. The trip latch in the operating

mechanism keeps the circuit-breaker in the closed position. Opening of the circuit-

breaker only requires the release of the trip latch..

The normal operating cycle is:

O-0.3s-CO-3 min-CO (according to IEC) or CO-15s-CO (according to ANSI).

1.4 Standards

The circuit-breakers comply with the requirements according to IEC Publication

60056 and in most cases also ANSI C37 and are restrike-free when breaking a

capacitive load.

.

1HSB435455-2 enrev1

0008

ABB Switchgear AB

Head Ofﬁce

SE-771 80 LUDVIKA

SWEDEN

Telephone: +46 (0) 240 782 000

Telefax: +46 (0) 240 714 928

ABB Switchgear

SF

6

Circuit-Breaker Operating Mechanism

type BLG 1002A

1HSB515432-100 en rev2

Product Description

The information in this document is subject to alteration without prior notice and should not be regar-

ded as an undertaking from ABB Switchgear AB. ABB Switchgear AB takes no responsibility for errors

that can occur in the document.

ABB Switchgear AB is not responsible for damage incurred due to the misuse of this document.

The document, or parts thereof, may not be reproduced or copied without prior permission from ABB

Switchgear AB. It may not either be imparted to a third party or otherwise be used without authorisa-

tion. Infringement hereof will be subject to action in accordance with applicable laws.

Article number: 1HSB515432-100 en rev2

Date: 1999-11-08

Product Description

1HSB515432-100 en rev2 i

LIST OF CONTENTS

1. Description.......................................................................... 1

1.1 Normal operating mode ..................................................................2

1.2 Opening operation...........................................................................3

1.3 Closing operation............................................................................4

2. Component units................................................................ 5

2.1 Drive unit ........................................................................................5

2.2 Mechanical interlock.......................................................................5

2.3 Catch gear .......................................................................................6

2.4 Dashpots..........................................................................................6

2.5 Auxiliary contact.............................................................................7

2.6 Heater element ................................................................................8

Product Description

ii

1HSB515432-100 en rev2

FIGURES

Figure 1-1. Operating mechanism ..................................................................... 1

Figure 1-2. Normal operating mode. ................................................................. 2

Figure 1-3. Opening operation. ......................................................................... 3

Figure 1-4. Closing operation. .......................................................................... 4

Figure 2-1. Drive unit. ....................................................................................... 5

Figure 2-2. Interlocking mechanism. ................................................................ 5

Figure 2-3. Catch gear. ...................................................................................... 6

Figure 2-4. Closing and Opening dashpots. ...................................................... 6

Figure 2-5. Limit switch with auxiliary contact. ............................................... 7

Figure 2-6. Heater element. ............................................................................... 8

Product Description

Description

1HSB515432-100 en rev2 1

1. Description

The spring operating mechanism BLG 1002A is intended for operating a circuit-

breaker with integrated opening springs. The opening springs are charged

automatically by the mechanism on closing of the circuit-breaker, whereby the

requisite energy for opening is obtained. Under no circumstances may the

mechanism be operated with the spring battery charged, without first being fitted

and trimmed with the associated circuit-breaker.

In principle the operating mechanism consists of a spring battery, which is charged

by a motor fitted with a worm gear, and a mechanism for actuating the opening and

closing action. The spring battery is automatically charged after each closing

operation.

The component parts of the operating mechanism are integrated in a cabinet, which

also contains a control panel with operating equipment. The top and doors of the

cabinet can be removed to facilitate service and overhaul procedures.

The standard operating cycle is O - 0.3 s - CO - 3 min - CO. The time between

closing operations should not be less than 1 minute during the testing of circuit-

breakers and relay systems involving more than 3 closing operations.

Figure 1-1. Operating mechanism

Item

1 Drive unit

2 Operating

mechanism

3 Control panel

4 Spring battery

5 Heater element

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2

4

3

5

B20001

Description

Product Description

2

1HSB515432-100 en rev2

1.1 Normal operating mode

During normal service the circuit-breaker is in the closed position. The opening

spring (14) on the circuit-breaker and the closing springs (7) in the operating

mechanism are charged. The circuit-breaker is kept in the closed position by the

operating mechanism’s opening catch gear (1).

Figure 1-2. Normal operating mode.

Item

1 Opening catch gear

7 Closing springs

14 Opening spring

14

7

1

B20028

Product Description

Description

1HSB515432-100 en rev2 3

1.2 Opening operation

The latch in the opening catch gear (1) is released on opening of the circuit-breaker

(1). The opening spring (14) pulls, via the pull-rod (13), the operating lever (4) to

the left. The movement is damped by the opening dashpot (3) at the end position

before the operating lever (4) rests against the cam disc (5).

Figure 1-3. Opening operation.

Item

1 Opening catch gear

3 Opening dashpot

4 Operating lever

5Cam disc

13 Pull-rod

14 Opening spring

14

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1

13

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3

B20029

Description

Product Description

4

1HSB515432-100 en rev2

1.3 Closing operation

On closing of the circuit-breaker, the latch is released in the closing catch gear (2).

The chain section (17) is released and transfers the closing spring’s (7) energy to the

cam disc (5). The cam disc rotates 360° clockwise and pulls the operating lever (4)

to the right until the opening catch gear (1) engages. The movement is damped in

the end position by the closing dashpot (12). The opening spring (14) is charged via

the pull-rod (13).

The chain section (18) travels up the same path as the chain section (17) travels

down.

Figure 1-4. Closing operation.

Item

1 Opening catch gear

2 Closing catch gear

4 Operating lever

5 Cam disc

7 Closing springs

12 Closing dashpot

13 Pull-rod

14 Opening spring

17 Chain section

18 Chain section

12

18

5

14

13

2

7

17

4

1

B20031

Product Description

Component units

1HSB515432-100 en rev2 5

2. Component units

2.1 Drive unit

The drive unit is supplied with one or two motor options for 60, 110 or 220 V DC

and 50, 60 Hz AC.

The motor should be able to charge the springs at 85% of the nominal voltage (IEC).

Figure 2-1. Drive unit.

2.2 Mechanical interlock

The interlocking mechanism prevents a closing operation from being carried out if

the circuit-breaker is already in the closed position or if the operating mechanism’s

closing springs are uncharged or not fully charged, which can occur, for example, if

the closing catch gear is opened by hand or if a mechanical fault occurs in the catch

gear.

Figure 2-2. Interlocking mechanism.

Item

1 Drive unit

Item

1 Limit switch

2 Interlocking lever

3 Interlocking disc

4Cam disc

5 Operating rod

6 Operating lever shaft

1

B20031

1

4

3

2

65

B20007

Component units

Product Description

6

1HSB515432-100 en rev2

2.3 Catch gear

The operating mechanism is fitted as standard with one closing coil and two

opening coils, but on request can be equipped with double coils on the closing side.

The standard voltage of the coil is 110, 220 V DC or AC, but other voltages may

occur.

The rated output of the coils is 200 W as standard. As an option there are coils with

a rated output of 450 W when 2-cycle interruption at 60 Hz is demanded.

Figure 2-3. Catch gear.

2.4 Dashpots

The operating mechanism is equipped with one Closing dashpot to brake the

rotating movement of the cam disc and one Opening dashpot to dampen the final

phase of the opening movement.

Figure 2-4. Closing and Opening dashpots.

Item

1 Catch gear

Item

1 Closing dashpot

2 Opening dashpot

1

B20034

1

2

B20024

Product Description

Component units

1HSB515432-100 en rev2 7

2.5 Auxiliary contact

The operating mechanism is equipped as standard with a 6-pole auxiliary contact

consisting of six opening and six closing contacts. Three closing and one opening

contact are used for the functioning of the operating mechanism. There is a

possibility of supplementing with six or twelve extra contacts.

The shaft of the auxiliary contact is in direct connection with the operating

mechanism’s operating lever and accordingly follows the movement of the breaker

contacts.

Figure 2-5. Limit switch with auxiliary contact.

Item

1 Limit switch

2 Auxiliary contact

2

1

B20035

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ABB SF6 LTB 245E1 BLG 1002A User manual

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