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MEBA ELECTRIC ENTERPRISE
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Distribution Boards

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CBT Distribution Boards

1. One Band-single phase and Neutral
Mounting Type MCB ways Box Assembly List No + Front Plate List No = Distribution Board List No
Without Hinged Protective Cover
  4 4 + 30 = 104
Surface 6 6 + 30 = 106
9 9 + 31 = 109
12 12 + 32 = 112
Flush 6 6 + 30/2 = 106/2
9 9 + 31/2 = 109/2
12 12 + 32/2 = 112/2
Without Hinged Protective Cover
Surface 4 4 + 30/1 = 104/1
6 6 + 30/1 = 106/1
9 9 + 31/1 = 109/1
12 12 + 32/1 = 112/1
Flush 6 6 + 30/3 = 106/3
9 9 + 21/3 = 109/3
12 12 + 32/33 = 112/3
2. Maximum earth fault loop impedance in ohms for circuits supplying socket outlets (also fixed equipment in bathrooms).
Device Rating of Device
  5A 15a 20A 30A 45A
Type 1 MCB 12 4 3 2 1.33
Rewirable Fuse 9.6 2.7 1.8 1.1 0.6
House Service Fuse 11.4 3.4 1.8 1.2 0.6
Type 2 MCB 6.8 2.3 1.7 1.1 0.75
Type 3 MCB 4.8 1.6 1.2 0.8 0.53
Regard Service of Ratings          
Device 6A 10A 16A 20A 32Z
Type 1 MCB 10 6 3.75 3 1.87
HRC Fuse 8.7 5.3 2.8 1.8 1.1
Type 2 MCB 5.67 3.4 2.12 1.7 1.06
Type 3 MCB 4 2.4 1.5 1.2 0.75
3. Note: At these values of loop impedance fuses will operate within 0.4 sec. and MCB’S will operate in 0.1 second Typical operating characteristics for Crabtree MCB’S.
4. Chart of Distribution Boards: 5.Other Parameters of Distribution Boards:
BS 3871 Type Instantaneous trip current range Typical Application Crabtree MCB
1 2.7-5 In Domestic Starbreaker
2 4-7 In Commercial Light Industrial Polestar C50
3 7-10 In General Industrial Polestar
Other electronic components including miniature circuit breaker, earth leakage circuit breaker, AC contactor, Power relay, etc. are available.
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Products List: ☆ Electrical Components
☆ Circuit Breaker
☆ Miniature Circuit Breaker
☆ Molded Case Circuit Breaker
☆ Earth Leak Circuit Breaker
☆ Residual Current Circuit Breaker
☆ Residual Current Device
☆ Current Transformer
☆ Safety Circuit Breaker
☆ Circuit Breaker Enclosure
☆ Hydraulic Magnetic Miniature Circuit Breaker
☆ Surge Protection Device
☆ Motor Protection Circuit Breaker
☆ AC Contactor
☆ Contact Block
☆ DC Operated AC Contactor
☆ Interlocking Contactor
☆ Contactor Starter
☆ Star-delta Reduced Voltage Starter
☆ Magnetic Starter
☆ Cam Starter
☆ Thermal Overload Relay
☆ Thermal Relay
☆ Power Relay
☆ Kilo-Watt Hour Meter
☆ Digital Panel Meter
☆ Meter Modular
☆ Power Meter
☆ Control Station
☆ Digital Frequency Meter
☆ Multimeter
☆ Ammeter & Voltmeter
☆ Meter Detector
☆ Current Transformer
☆ Distribution Box
☆ Distribution Boards
☆ Junction Box
☆ Bus Bar Support
☆ Industrial Plugs & Sockets
☆ Push Buttons & Indicators
☆ Magnetic Switch
☆ Isolating Switch
☆ Pedal Switch
☆ Push Button Switch
☆ Universal Changeover Switch
☆ Limit Switch
☆ Gear Switch
☆ Toggle Switches