ZWZB - 500/400 is a DC - powered, normally - closed electromagnetic drum brake, a replacement for ZWZ3/ZWZ3A series, designed for DC - driven industrial machinery braking. Below are its core details:
Core Technical Parameters
| Parameter | Value |
|---|---|
| Model | ZWZB - 500/400 |
| Applicable drum diameter | 500 mm |
| Rated braking torque | 400 N·m |
| Power supply | DC 110V/220V (control circuit AC 380V, 50Hz) |
| Matched electromagnet | DC electromagnet (rated suction force varies by manufacturer, typically matched to 400 N·m torque demand) |
| Brake shoe retraction distance | 0.6-0.8 mm |
| Operating frequency | ≤720 cycles/h (S3 - 25%, 40%, 60% duty cycle) |
| Total weight | About 85-95 kg (subject to manufacturer's configuration) |
| Compliance standards | GB 6334-86 (dimensions/torque), JB/T7685-2006 (technical requirements) |
| Key installation dimension (typical) | Overall length approx. 850 mm, installation hole center distance approx. 450 mm, mounting height approx. 900 mm |
Operating Conditions
Ambient temperature: -20°C to +40°C (some manufacturers extend to -25°C to +50°C).
Relative humidity: ≤90% (non - condensing).
Altitude: ≤2000 m.
Environment: No flammable, explosive, corrosive gases or conductive dust; outdoor/corrosive environments require anti - corrosion modification.
Structural & Performance Features
Fail - safe normally - closed design: Spring - applied braking when power - off, electromagnetic release when powered on, ensuring load safety during power outages.
DC - driven efficiency: Dedicated for DC - powered equipment; stable release, low heat generation, and high transmission efficiency at hinge points with self - lubricating bearings.
Eco - friendly & durable: Non - asbestos brake linings; reliable performance, low noise, and adjustable gap for easy maintenance.
Replacement compatibility: Consistent with ZWZ3 series installation dimensions for seamless upgrades.
Typical Applications
Suitable for deceleration and parking braking of DC - driven cranes, winches, metallurgical machinery, and port loading/unloading equipment, meeting medium - load, moderate - frequency braking needs.
