This standard specifies the structural type, basic dimensions, basic structural requirements and layout of main components of marine AC low-voltage switchboards. This standard applies to marine three-phase AC 50 or 60Hz, 1000V or less main switchboards, emergency switchboards and zone switchboards. GB 11803-1989 Marine AC low-voltage switchboard structure and basic dimensions GB11803-1989 Standard download decompression password: www.bzxz.net

UDC 621. 316. 3 : 629. 12. 06661
National Standard of the People's Republic of China
GB11803-89
Marine A. C, low yoltage switchboard-Construction and basic dimensions
Marine A. C, low yoltage switchboard-Construction and basic dimensions1989-11-03Promulgated
National Technical Bureau
1990-07-01Implementation
W.National Standard of the People's Republic of China
Marine A, C, low yoltage swdtchboard-Constructlon and basic dimensions dimensionSubject content and applicable model drawings
GB11803—89
This standard specifies the structural type, basic external dimensions, basic structural requirements and the arrangement of main components of marine AC low-voltage switchboards.
This standard applies to the main switchboard, emergency switchboard and zone switchboard (hereinafter referred to as switchboard) of three-phase AC 50 or 60Hz and 1000V or less on ships.
2 Structural type of switchboard
2.1 Closed type, its frame is generally composed of steel plates folded and assembled, and is a vertical self-supporting fixed type, and the appearance is shown in Figure 1. s
Approved by the State Administration of Technical Supervision on November 3, 1989 and implemented on July 1, 1990
W.GB11803-89
2.2 Open-type rear panel: Its frame is generally welded and assembled by angle steel, and is a vertical white fixed front shield type, which is only applicable to distribution boards with a voltage of 500V and below. The appearance is shown in Figure 2. ·250
2.3 Box type: Its shell is made of steel plate, which is an integral installation type, and the appearance is shown in Figure 3. Figure 3
W. Basic dimensions of single-panel distribution boards
The basic dimensions of single-panel distribution boards are shown in Table 1. Screen height
Closed type
Open type
4 Basic requirements for distribution board structure
4.1 Closed type
CB 11803—89
660.760.860
660.760,860.960
760.860,960.1060
860,960,1 060,1 160,1 260,1 3601 360.1 460.1 560,1 660
630,730,830,930
630,.730.830.930
630.730.830.930.1 030
930,1 030,1 130.1 230,1 330
The top protection level is IP22. However, if it is installed in a control room that meets the requirements of ship regulations, the protection level of its top should be at least IP21. Both sides should have protection measures not lower than the protection level IP2X. Ventilation shutters are set up in front of the board, above and below, and the height of the shutters is 90mm. b.
Insulating handrails should be set up in front of and behind the board. c
Protective doors with ventilation shutters are set up behind the board. d
The panel layout is generally two-stage.
The kidney frame should have sufficient strength and should be considered to prevent harmful deformation under vibration and impact. E
W.bzsoso：com4.2 Shop type behind the panel
GB11803-89
a: The top protection level is TP22, but if it is installed in a control room that meets the requirements of ship regulations, the protection level of its top should be at least IF 21. Both sides should have protection measures with a protection level not lower than IP 2 X. h. Insulated handrails should be installed in front and behind the panel, and the insulating handrails behind the panel must be installed horizontally. c. The panel layout is generally two-stage.
The kidney frame should have sufficient strength and should be considered to prevent harmful deformation under vibration and impact. d.
4.3 Box type
B, the protection level of the upper part is IP22.
h, the panel layout is generally two-stage, the upper panel is the instrument panel, the middle panel is the generator control panel, and the lower panel is the load panel. c. The cable inlet is located at the bottom plate, and a dark expansion board must be installed on the rear side. 5 Arrangement of main components on the power distribution board
5.1 Arrangement on the generator control panel (including the well car panel) 5.1.1 Arrangement of each row of measuring instruments on the panel. According to the type and quantity of each row of instruments, when viewed from the front, from left to right, choose to arrange in the order of voltage meter, power meter, step meter, power factor meter, ammeter and megohmmeter. Voltage meter, frequency meter and ammeter should be placed in the highest row first.
5.1.2 Operation sequence of universal conversion switch
Sequence; from left to right, A phase, B phase, C phase or AB, BC, CA. Speed; clockwise to increase speed, counterclockwise to reduce speed. Size: clockwise to increase, counterclockwise to decrease. 5.1.3 Layout of programmable circuit breakers
The minimum installation clearance dimensions of frame-type circuit breakers and the basic dimensions of the corresponding control panel refer to Appendix A (reference) Table A1. 5.1.4 For generators with a power below 50 kW (or kVA) and not running in parallel, molded case circuit breakers can also be used for protection. The minimum installation clearance dimensions and arrangement requirements of molded case circuit breakers refer to Appendix A Figure A1 and Table A2. 5.1.5 Layout on the panel
a. The typical layout on the generator control panel is shown in Figure 4. b. The typical layout on the parallel control panel is shown in Figure 5. 4. The circuit breaker is DW14 type. The wellhead control panel is GB 11803—89. The circuit breaker is DW94 type. The generator parallel control panel is DW9S type. Generator and parallel control panel
(with step indicator)
5.1.6 When the control panel is equipped with load switch, the load switch should be arranged below the generator control switch and in accordance with the requirements of Article 5.2. 口
W.bzsoso:com5.2 Layout of load panel
GB 11803-89
5.2.1 Circuit breakers with the same external installation dimensions should be used at the same level of each panel. 5.2.2 Layout of molded case circuit breakers
For the minimum installation space dimensions and arrangement requirements of molded case circuit breakers, refer to Appendix A Figure A1 and Table A2. a
b. For the layout of molded case circuit breakers in the direction of the distribution board, refer to Appendix A Figure A2. 5.2.3 Layout on the panel
For the layout of the panel, refer to Figure 6.
Self-installed
Japanese ... 6.7 The typical arrangement of the main components on the closed switchboard is shown in Figure 7. The typical arrangement of the main components on the open switchboard behind the panel is shown in Figure 8.
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GB1180389
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11803—89
W.7 Grounding and marking
CB11803-89
7.1 The panel with electrical equipment installed and the frame, as well as the frame, should have reliable electrical connections. A grounding device should be provided at an appropriate position at the bottom of the frame.
7.2 On the distribution board panel, the positions of instruments, switches, indicator lights, buttons, operating handles, hand wheels, etc. shall be provided with clear and durable signs indicating the purpose and operating position of the corresponding components. The overload protection device shall also indicate the rated value or setting value. 7.3 For circuit breakers subject to priority unloading and emergency cut-off control, the operating handle shall have obvious signs of different colors. W.GB11803-89
Installation space dimensions and layout requirements for frame-type circuit breakers and molded case circuit breakers (reference)
A1 The minimum installation space dimensions of frame-type circuit breakers and the basic dimensions of the corresponding control panel are shown in Table A1. Table Al
Frame type circuit breaker
DW914-
DW914-1600
DW914-
2000(G)
Dw914-
3200(G)wwW.bzxz.Net
DW914-4000
DW94-800P| |tt||DW94A-800P
E W94-1500P
Dw94-2500P
DW95-400B
DW95-600B
Approximate installation method
Breaker
Control panel
Circuit breaker
Handle)
Control panel
The minimum installation space dimensions and arrangement requirements of molded case circuit breakers are shown in Figure A1 and Table A2. A2
Circuit breaker
Hengfei arc distance
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GB11803---89
Note, ① Dimensions D and E represent the distances from the two end faces of the circuit breaker to the ground. Dimensions 3\ and \ represent the heights from the two sides of the circuit breaker to the live parts. Table A2
Molded case circuit breaker
(TH-5DB 2P)
(TH-5SB2P)
(TH-5SB 3P)
(FG-30)
(TO-100BA)
(TG-100B)
(T$-10℃)
DZ910-190
(TL-100C)
(T3-225BA)
(TG-225)
(TL-225B)
DZ91n-250
(TS250)
(TO-40OBA)
W.
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