BCH SME250H2 DC Electromagnetic Series Shoe Brake (250 mm, 77 A)
BCH SME250H2 DC electromagnetic series shoe brake for a 10" / 250 mm brake wheel and motor frames 406, 604, 803: 272 Nm with 77 A max. FLC on 1/2 hour (crane) duty, 176 Nm with 57 A on 1 hour (mill) duty. BCH SM series type DC electromagnetic shoe brake conforming to AISE and NEMA standards. Series brakes have their coils in the armature circuit of a DC motor and are rated in amperes for 1/2 hour (crane duty) or 1 hour (mill duty) corresponding to the rating of DC series motors. Electrically released and spring set, so the brake sets in the event of power failure.
Specifications
| Cat Code (1/2 hour rating) | SME250H2 |
| Cat Code (1 hour rating) | SME25002 |
| Brake Type | Series (SM series brake) |
| Brake Wheel / Drum Dia | 10" / 250 mm |
| Motor Frame Size | 406, 604, 803 |
| 1/2 Hour (Crane Duty) Rating | Max. torque 200 lbf ft / 272 Nm; max. FLC 77 A |
| 1 Hour (Mill Duty) Rating | Max. torque 130 lbf ft / 176 Nm; max. FLC 57 A |
| Release Current for Series Coil | 40% of rated current (with the required ancillary control gear) |
| Brake Set Current for Series Coil | Below 10% of rated current (with the required ancillary control gear) |
| Design | Electromagnetic shoe brake, over the wheel design; electrically released, spring set (fail safe) |
| Standards | AISE and NEMA |
| Coil | Epoxy filled Class F coil encapsulated in a sheet steel housing |
| Class of Insulation of Coil | Class F |
| Insulation Voltage | 660V |
| No. of Operations per Hour | 600 operations |
| Mechanical Life | 20 x 10^6 |
| Finish of Brakes | Grey |
| Torque Adjustment | All brakes can be mechanically adjusted down to 50% of their maximum rated torque |
| Operating Time | Approx. 0.2 to 1 sec. to set and 0.12 to 1.2 sec. to release, depending on the size of the brake |
| Optional Features (on request) | Residual magnetic gap adjustment (RMA); manual release (MR); limit switch attachment (LSA); special epoxy paint (SP) |
| Weight (metric version) | 105 kg |
Ordering / Variants
1 hour (mill duty) rating: SME25002. AISE inch versions: SME10H2 (1/2 hour) / SME1002 (1 hour). When ordering, confirm brake drum dia, duty rating, current rating and motor frame no. Optional features: RMA, MR, LSA, SP.
Typical Applications
DC series motor drives on cranes (1/2 hour duty) and mills (1 hour duty)
Datasheet, certificates and quotation on request - info@west-velocity.com.
