Electric Motor Control using Fuji Manual Motor Starters

AutomationDirect has partnered with Fuji Electric to offer a complete line of electric motor controls.

We now offer Fuji's DUO series line of motor contactors, overload relays, and manual motor starters, as well as their Odyssey line of large contactors and overload relays. These motor speed controller products provide complete electric motor control solutions up to 300 horsepower at 480 VAC.

Fuji's DUO line of motor controls components are fully integrated and can be used to build a conventional contactor/ overload starter, or the Fuji manual motor starter (MMS) can be combined with an SC-E series contactor for a combination motor starter. Since the MMS is UL listed for Category E self-protected motor control, it can be used for motor branch circuit protection without the need for additional motor protection such as fuses or molded case circuit breakers.

NOTE: Changes in UL 508 now require that short circuit trip contacts should be added to the manual motor starer (MMS), and a terminal cover should be added to the 32 amp frame size MMS.

AutomationDirect offers the MMS in a 32-Amp version with a 45 mm frame width and a 63-Amp version with a 55 mm frame width.

Both manual motor starter versions have high breaking capacities, up to 100,000 Amps in some ranges. The MMS combination motor starters can accommodate electric motors up to 40 horsepower at 480 VAC. The conventional motor starters in the DUO line can accommodate motors up to 100 horsepower at 480 VAC.

The DUO line is available in 24 VAC, 24 VDC, 120 VAC, and 240 VAC coil versions.

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NOTE: Product selection guide documents and other technical information can be found under the "Technical Info" tab for each product category, or in the "Tech Support" section of our Web site.

Short circuit protection

The BM3 Series manual motor starters (MMS) provide new circuit breakers for motor use that provide optimal protection by integrating the functions of a molded case circuit breaker (MCCB) and thermal overload relay into a highly compact unit. The BM3 Series manual motor starters (MMS) provide magnetic short circuit protection. This short circuit trip rating is approximately 13 times the FLA rating of the overload function.

Thermal overload relay functions

Thermal overload relay functions include:

• Overload protection
• Phase-loss protection
• Rated current adjustment
• Ambient temperature compensation

Manual motor starter advantages

Innovative technology has integrated the functions of a molded case circuit breaker (MCCB) and a thermal overload relay.
The advantages of this new technology include:

• Compactness
  Mounting space: MCCB + Thermal overload relay: 100%
  MMS: 43% (57% reduction)
  
  
• High breaking capacity
  50, 100 kA 400 VAC
  NOTE: See specific ratings for each manual motor starter at the operating voltage.
  
  
• IEC short circuit protective coordination
  IEC 60947-4-1 Type 1, 2
  
  
• Reduction in wiring work
  MCCB + Contactor + Thermal overload relay: 100%
  MMS + Contactor: 50% (50% reduction)
  
  
• Standards
  UL 508, CSA C22.2 No.14, IEC 60947-1, 60947-2, 60947-4-1
  
  
• Ecologically friendly design
  - Recyclable thermoplastic resin used in plastic parts
  - Indication of materials used
  - Cadmium-free contacts

Manual Motor Starters - BM3 Series

A Manual Motor Starter (MMS) provides reliable protection for overloading and short-circuiting in motor branch circuits.
We offer compact motor starters with a 55mm width for rated currents to 63A and motor capacities to 40 Hp at 480 VAC.

Features include:

• Various types available in two different frame sizes:
  - 32A frame for the 45mm width
  - 63A frame for the 55mm width
  
  
• A wide motor capacity range up to 30 kW (40 Hp at 480 VAC)
  
  
• Rotary handle operators
  
  
• ON/ OFF and trip state indication for all frames
  
  
• Adjustable thermal-magnetic trip types
  A wide-rated operational current range of up to 32 A for the 45mm wide and 63A for the 55mm wide motor starters.
  Suitable for 3-phase motors up to 40 Hp at 480 VAC.
  - 32AF: BM3RHB Series
  - 63AF: BM3VHB Series
  
  
• Maximum breaking capacity of 100 kA at 240 VAC and 50 kA at 460 VAC per IEC 60947-2
  
  
• Common accessories to reduce inventory requirements
  
  
• International standards/approvals: IEC, cULus

Manual motor starter (MMS) applications

Described below are typical problems encountered in conventional systems, along with the solution offered using the MMS system.

• Short-circuit breaking protection
  When numerous small and medium motor loads exist in a circuit requiring high breaking capacity, there is no high-breaking capacity circuit breaker with a small rated current for short-circuit protection.
  
  The manual motor starter can be used in 100 kA short-circuit current circuits for three-phase, 240 V motors with rated capacity up to 15 kW, and in 50 kA short-circuit current circuits for three-phase, 415 V motors with rated capacity up to 30 kW.
  
  
• Back-up breaking system
  When a back-up molded case circuit breaker (MCCB) is installed upstream to solve the problem described in "short-circuit breaking protection" above, a short in one of the load circuits also trips the upstream breaker and stops the other operating load circuits.
  
  Despite their compact size, the 32AF and 63AF MMS provide high-performance short-circuit current breaking. They eliminate the need for an upstream circuit breaker for back-up use.
  
  
• Overload protection
  Motor protection breakers cannot be adjusted to match the rated current of the motor being protected.
  
  Equipped with a wide-range current adjustment dial (with maximum/ minimum ratio of 1.4 to 1.6), the MMS easily adjusts to match the rated current of the motor, for optimum protection.
  
  
• Control panel size
  Considerable space is required to install a back-up circuit breaker or a combination starter consisting of a circuit breaker and a thermal overload relay. As a result, the panel size has to be increased.
  
  The compact size of the MMS, including thermal overload relay functions, enables a smaller installation area with less wiring space, for a reduction in panel size.

Optional Motor Starter Accessories

A wide variety of accessories enables a flexible response to changes in specifications.
Snap-on fittings speed up mounting. Accessories like auxiliary contact blocks, shunt trip devices, and undervoltage trip devices have been standardized for the 45 mm and 55 mm wide frame sizes of the BM3R and BM3V. Enclosures and external operating handles are available as optional accessories. Accessories are easily mounted.

• Auxiliary contact blocks
  Internally mountable auxiliary contact blocks and alarm contact blocks can be frontally mounted.
  Externally mountable auxiliary contact blocks can be mounted on the left side.
  Auxiliary contact blocks are linked to the ON/ OFF operation of the MMS.
  Up to two contact blocks can be mounted to the right/ left front, and up to two contact blocks can be mounted to the left side.
  
  
• Alarm contact blocks operate when the MMS trips due to overload, phase-loss, or short-circuit. It is not linked to the ON/ OFF operation of the MMS.
  An alarm is displayed in the contact block’s indicator when the alarm contact operates.
  NOTE: Operation can be checked with the test trip function.
  
  
• Shunt trip and undervoltage trip devices
  A shunt trip device is used to remotely trip the MMS. An undervoltage trip device automatically trips the MMS when the control circuit voltage drops below the specified value. Shunt trip and undervoltage trip devices are available in a variety of operating coil voltage ranges.
  
  
• Standard and emergency external handles are available.
  External operating handles for the MMS are used to operate the MMS mounted in the enclosure from the outside of the panel.
  An interlock mechanism prevents someone from mistakenly opening the panel door when the MMS is in the ON state (with a screw release).
  The shaft can be cut to match the distance between the MMS and the panel door.
  OFF lock function.
  Can be locked OFF with up to three padlocks.
  NOTE: Padlocks are to be provided by the customer.
  
  
• Screw mount kit
  Used only when DIN rail mounting is not used. Lugs push into the back of the MMS and provide a sturdy lug for direct panel mounting. 10 pieces per package.
  
  
• Busbar
  For connecting muliple manual motor starters with and without accessories. May require a feed-in terminal for connecting line power to the bus.
  
  
• Link modules
  For electrically connecting the manual motor starter to a contactor.
  
  
• Base plates
  For mounting MMS and contactor for a combination motor starter.