BCH 925 DC Mill Duty Contactor (300A, 1 NC)
BCH 900 range DC mill duty contactor type 925, single pole normally closed, rated 300 A thermal and DC-5 operational current at 600 V. Designed for arduous crane and steel-industry duty, it switches AC or DC circuits with a DC-energised operating coil and is fitted with surge suppressors as standard. Cast or forged frame and armature on an insulated steel channel, hinged arc chutes with magnetic blow-out, and renewable cadmium-copper contacts.
Specifications
| Product Code | 925 |
| Type | Normally closed |
| Main Contacts | 1 NC |
| Rated Thermal Current (Ith) | 300 A |
| Operational Current Ie, DC-5 | 300 A |
| Making and Breaking Current | 1800 A |
| Rated Voltage | 600 V |
| Blowout Coil Rating | 300 A |
| Operating Time, Energised to Fully Closed (approx.) | 130 ms |
| Operating Time, De-energised to Fully Open (approx.) | 70 ms |
| Minimum Arcing Clearance (up to 250 V / up to 600 V) | 89 mm / 114 mm |
| Terminal Capacity of Main Contacts | Cable socket 400 A; busbar Cu 25 x 5 / Al 40 x 5 mm |
| Auxiliary Contacts | 1NO+1NC or 2NO or 2NC |
| Coil Consumption | 45 W |
| Weight | 17.3 kg |
| Standards | IEC 158-1, IS 2959 and VDE 0660 (ambient temperature 60°C, altitude not exceeding 2000 m) |
| Mechanical Endurance | 20 million operations |
| Electrical Endurance | 1 million operations |
| Number of Operations | 600 operations per hour |
| Insulation Voltage (Ui) | 600 V |
| Operating Coil | DC energised, insulated to Class B, 600 V metrosil surge suppressor across coil terminals |
| Coil Operating Voltage Range | +10% -15% of rated voltage |
| Terminal Capacity of Auxiliary Contacts | 10 mm² |
Ordering / Variants
Mounting code: XS surface/front on sheet steel, XI surface/front on insulated base, YS / YI surface/rear, ZS / ZI elevated/front. Coil voltage code: 110V DC A1, 220V DC B1, 440V DC C1 (example: 914XS/A1 = single pole NO, 110V coil, surface front mounting on sheet steel). Coil voltage table also lists: 110V DC A1, 220V DC B1, 240V K1R, 250V DC F1, 550V DC D1.
Typical Applications
Crane and steel mill duty, industrial control
Datasheet, certificates and quotation on request - info@west-velocity.com.
