BCH 935 DC Mill Duty Contactor (300A, 1 NO, accelerating)
BCH 900 range DC mill duty contactor type 935, single pole normally open, 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. Inductive time limit (accelerating) version with closing and hold-out coils.
Specifications
| Product Code | 935 |
| Type | Normally open (accelerating type, inductive time limit) |
| Main Contacts | 1 NO (accelerating) |
| 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 | 40 W |
| Weight | 17.3 kg |
| Time Delay for Accelerating Contactor | 650 ms (3 secs approx with capacitors) |
| 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: 24V DC U1, 48V DC W1, 55V DC Q1, 110V A1R, 110V DC A1, 220V DC B1, 240V K1R, 250V DC F1, 275V DC J1, 550V DC D1. AC control is not available for this version.
Typical Applications
Crane and steel mill duty, industrial control
Datasheet, certificates and quotation on request - info@west-velocity.com.
