4
Contents Page
7.2 Preparatory activities 38
7.3 Movement of the withdrawable part 38
7.3.1 Manual insertion from the
test/disconnected position to
the service position 38
7.3.2 Manual withdrawal from the service
position into the test/disconnected
position 39
7.3.3 Motor-driven movement of the
withdrawable part 39
7.3.4 Withdrawal from the test/disconnected
position onto the service truck 39
7.3.5 Insertion from the service truck into
the test/disconnected position 40
7.4 Operation of the circuit-breaker 40
7.4.1 Charging the spring energy
storage mechanism 40
7.4.2 Closing and opening the circuit-breaker 40
8 Maintenance 42
8.1 General 42
8.1.1 Service-life 42
8.2 Inspection and functional testing 42
8.2.1 Switching device in general 42
8.2.2 Stored-energy spring mechanism 42
8.2.3 Breaker pole 43
8.2.4 Withdrawable assembly 43
8.3 Servicing 43
8.3.1 Switching devices in general 43
8.3.2 Stored-energy spring mechanism 43
8.3.3 Breaker pole 43
8.4 Repair 44
8.4.1 VD4 circuit-breaker run-on block 44
8.4.2 Replacement of circuit-breaker
parts and accessories 44
8.4.3 Touch up of surfaces 44
8.4.4 Circuit-breakers in general 45
8.4.5 Replacement of contact systems 45
8.4.6 Replacement of withdrawable assembly 45
8.5 Testing withdrawable parts with a
VD4 type circuit-breaker 45
8.5.1 Motor-driven withdrawable parts 45
8.5.2 Checking the correctness of
dimensional settings 45
8.5.3 Checking auxiliary switch settings
on type A withdrawable parts 46
8.5.4 Checking auxiliary switch settings
on type B withdrawable parts 46
8.5.5 Checking the direction of rotation of the
travel motors on motor-driven
withdrawable parts 46
8.5.6 Testing of interlock conditions 46
8.6 Spare parts, auxiliary materials, lubricants 47
8.6.1 Spare parts 47
8.6.2 Auxiliary materials 49
9 Application of the
X-ray regulations 53
10 Comparison of designations to
VDE-DIN 40719 Part 2
and IEC 61346-1/IEC 61346-2 54
We reserve all rights to this publication. Misuse, particularly including duplication and making available of this manual –
or extracts – to third parties is prohibited. The information supplied is without liability. Subject to alteration.
© ABB AG, 2005
Contents Page
1 Summary 5
1.1 General 5
1.2 Standards and specifications 5
1.2.1 Switchgear manufacture 5
1.2.2 Installation and operation 5
1.3 Operating conditions 5
1.3.1 Normal operating conditions 5
1.3.2 Special operating conditions 5
2 Technical data
Circuit-breakers for fixed installation 6
2.1 Technical data and weight 6
2.2 Technical data
Releases and blocking magnet 7
2.3 Technical data
Charging motor for stored-energy
spring mechanisms 8
2.4 Permissible number of vacuum
interrupter switching operations 11
2.5 Dimensional drawings
Circuit-breakers for fixed installation 13
2.6 Circuit-breaker wiring diagram 16
3 Technical data
Circuit-breakers on withdrawable part 17
3.1 Technical data and weight 17
3.2 Dimensional drawings 19
3.3 Wiring diagrams for C.B. on
withdrawable part 26
4 Structure and function 32
4.1 Basic structure of the C.B. on
withdrawable part 32
4.2 Structure on the breaker poles 32
4.3 Structure of the breaker
operating mechanism 32
4.3.1 Releases, blocking magnet and
auxiliary switches 32
4.3.2 Mounting of the VD4 on trucks from
other manufacturers 33
4.4 Function 33
4.4.1 Charging of the spring energy
storage mechanism 33
4.4.2 Closing procedure 33
4.4.3 Opening procedure 34
4.4.4 Auto-reclosing sequence 34
4.4.5 Quenching principle of the
vacuum interrupter 34
4.5 Interlocks/protection against
maloperation 34
5 Despatch and storage 37
5.1 Condition on delivery 37
5.2 Packaging 37
5.3 Transport 37
5.4 Delivery 37
5.5 Intermediate storage 37
6 Installation and mounting of the breaker 38
7 Commissioning/Operation 38
7.1 Note on safety at work 38
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