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5.1 Design
5.1.1 Draw-Out Unit
The draw-out plate, with its racking mechanism, allows the VCB to be racked into or out of the service position to
test positions inside the switchgear. The main position indicating device is mechanically joined with the synchronizing
shaft of the ISM to reliably indicate the status of the ISM. The manual tripping device provides mechanical tripping for
the ISM.
A series of interlocks are provided to prevent malfunctions and to ensure maximum operator safety.
The spring-loaded contact system contains insulated contact arms which create an electrical connection between the
VCB main terminals and fixed contacts of the switchgear when the draw-out unit is in the service position.
The open design of the draw-out unit provides visual control of the main circuit‘s disconnection when it is in the test
position. The IP2X front cover of the VCB can be provided as a design option.
The auxiliary circuit cable contains ISM and DOU auxiliary circuit switches and optional interlock wiring. The auxiliary
multi-pin connector provides interconnection between the draw-out circuit breaker‘s secondary wiring and the
switchgear‘s auxiliary circuits compartment. The CM is installed in the switchgear‘s auxiliary circuits compartment to
provide all control, and the indication wiring is grouped in the low-voltage compartment of the switchgear. In case
of auxiliary supply loss, manual charging of the circuit breaker can be performed by connecting to the CM in the low
voltage compartment, excluding the necessity of operating inside the high-voltage compartment.
Withdrawable VCB
Figure 17
VCB15_LD8_16D 800 A, PCD 210 mm
1. Control wiring plug
2. Main contacts position indication
3. Manual trip button
4. Racking mechanism of draw-out plate
5. Fixing mechanism of draw-out plate
6. Main contact upper terminal
7. Main contact lower terminal
The draw-out plate auxiliary switches module is not shown in the Figure 17.
Summary of Contents for VCB15
Page 2: ......
Page 4: ......
Page 5: ...1 Introduction...
Page 9: ...2 Presentation...
Page 11: ...3 Product Coding...
Page 23: ...4 Technical Parameters...
Page 33: ...5 Design and Operation...
Page 42: ......
Page 43: ...6 Functionality...
Page 48: ......
Page 49: ...7 Application Notes...
Page 56: ......
Page 57: ...Appendix 1 Type Tests...
Page 61: ...Appendix 2 Withdrawable VCB Package Dimensions...
Page 63: ...Appendix 3 Overall Drawings...
Page 65: ...65 VCB15_LD8_16D 17 5kV 800 A PCD 210 mm weight 76 kg Lmax 677 mm Wmax 682 mm Hmax 528 mm...
Page 69: ...69 VCB15_MD1_16D 17 5kV 1250 A PCD 210 mm weight 74 kg Lmax 677 mm Wmax 682 mm Hmax 515 mm...
Page 73: ...73 VCB15_HD1_16D 17 5kV 2500 A PCD 275 mm weight 140 kg Lmax 656 5 mm Wmax 882 mm Hmax 704 mm...
Page 74: ...74 VCB15_HD1_16D 17 5kV 3150 A PCD 275 mm weight 158 kg Lmax 656 5 mm Wmax 882 mm Hmax 704 mm...
Page 101: ...101 3 n 3B 3B 24 kV 1250 A fixed contact 2000 A fixed contact...
Page 102: ...102 3150 A fixed contact...
Page 103: ...Appendix 4 Secondary Schemes...
Page 104: ...104 VCB15_LD8_16D with Plastic Plug...
Page 105: ...105 VCB15_LD8_16D with Metal Plug...
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