ABB SF6 LTB 245E1 BLG 1002A User manual

Product Manual
1HSB435416-2 en Rev 1
LTB 245E1
BLG 1002A
3-pole operation

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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
SF6Circuit-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.
© ABB Switchgear AB
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
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B1
0085

Description Product Description
21HSB435455-2 enrev1
1.2 The circuit-breaker’s gas system
The circuit-breaker poles are permanently filled with SF6gas 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 SF6gas and N2
gas or CF4gas 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-PufferTM- principle with a
puffer cylinder (1) divided into two chambers. An Auto-PufferTM section (2) and a
compression section (3).
When the normal operating currents are cut
the SF6gas 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-PufferTM 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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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: [phone]
Telefax: [phone]

ABB Switchgear
SF6Circuit-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.
© ABB Switchgear AB
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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B20001

Description Product Description
21HSB515432-100 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
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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
5Camdisc
13 Pull-rod
14 Opening spring
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B20029

Description Product Description
41HSB515432-100 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
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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
4Camdisc
5 Operating rod
6 Operating lever shaft
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B20031
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65
B20007

Component units Product Description
61HSB515432-100 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
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B20034
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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
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B20035