Factory supplied DC miniature circuit breaker-FTBD to Grenada Factory


Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

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Product illustration:


Technical Data

Model FTBD DC miniature circuit-breaker
Number of poles IP 2P
Rated frequency: AC 50/60Hz
Rated voltage (V) 125/250 250/500
Rated current (A) 1,2,3,4
Rated ultimate short-circuit breaking capacity(KA) 6.5
Rated current (A) 6,10,16,20,25,32,40,50,63
Rated ultimate short-circuit breaking capacity(KA) 20/10 20/10
Rated impulse withstand voltage Uimp(KV) 4
Mechanical and electrical life: 20000
Protection rating IP20
Installation On DIN rail 35mm according to JB6525
Connection capacity: Cross-section of conductors up to 25mm2, Cross-section of busbar from 0.8-2mm2
Ambient temperature (°C) -25°C ~ +45°
Altitude (m) ≦4000m
Relative air humidity no more than 95%
Pollution degree
Installation condition Used in place without obvious shock and vibration
Weight (g) 116 232

Tripping characteristic


Exterior  and dimensions


Number  of poles 1P 2P
A 80±0.8
B 74.2±0.8 75.7±0.8



D 44±0.8



F 45±0.8
G 35.5±0.8

A leader in monitoring and controls systems for the mining industry since 1975, American Mine Research, Inc. offers the most powerful and versatile line of products available on the market today. Combining the latest technology with the growing needs of our customers, AMR works to supply products that not only enhance safety but also improve productivity at mines all over the world.

Circuit Breakers

AMR’s CB Series Features and Capabilities vs. Molded Case Circuit Breaker

Increased Safety:
• Reliability of vaccum contactor
– No arcing across contacts
• Password Protected
– Operating parameters set by foreman
• Alerts personnel of hazardous conditions
• Proven to withstand harsh environmental conditions
• Low voltage and easily configurable (4 button keypad, 4×40 LCD) control unit
• Electrical lockout for repair and maintenance
– Employee shortcuts avoided
• Customized setting and parameters
– Magnetic and thermal fault settings, etc.
• Ground fault detection
– Prevents electric shock from “hot” frame of equipment
• Monitoring of “stuck pole (bottle)” reduces chance of injury

Cost and Time Savings:
• Reduction in maintenance downtime
– Remote electrical lockout capability
• Eliminates molded case circuit breaker replacement
– Rated for 1 million trips useful life
• Increased trip accuracy leads to decreased troubleshoot time
• Eliminates nuisance tripping
• Prevents equipment damage
– Phase loss and undervoltage monitoring
• Reduction in spare parts inventory

Remote Capabilities:
• Compatible with Data Highway® and other PLC digital I/O
• Labor savings in pinpointing problems and resuming production
• Data logging:
– Start amperage and voltage requirements
– Fault history- date and time stamp
– Record of hours closed- Provides accountability for downtime
– Overcurrent conditions
– Predictive maintenance vs. unscheduled downtime
– Spare channels for customer specifications


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