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MWZ200-160 Electromagnetic Drum Brake | 160N·m, Ø200mm, MZ-160 DC Magnet, NC Fail-Safe, For Mine Hoist & Explosion-Proof Duty
MWZ200-160 Electromagnetic Drum Brake ✔ DC Magnet - No AC Hum, No Arc, Explosion-Friendlier MWZ200-160 runs on DC 220V through a DT-200 linear energy-saving electromagnet. No 50Hz alternating flux, no coil buzz, no AC contactor arc. Inherently quieter and safer than AC brakes (JZ/TJ2) in...
Description
MWZ200-160 Electromagnetic Drum Brake
✔ DC Magnet - No AC Hum, No Arc, Explosion-Friendlier
MWZ200-160 runs on DC 220V through a DT-200 linear energy-saving electromagnet. No 50Hz alternating flux, no coil buzz, no AC contactor arc. Inherently quieter and safer than AC brakes (JZ/TJ2) in coal mine, chemical, and dusty zones - pair with a rectifier module (AC 380V in → DC 220V out) and you get DC benefits on an AC site.
✔ Fail-Safe, Spring-Applied - Power Off = Brake On
Normally closed. Main spring (60Si2MnA) holds 160 N·m. DC coil only to RELEASE. Blackout / E-stop / contactor drop → spring clamps Ø200 drum in ≤0.3s. Same safety logic as YW/QW/JZ, but with zero AC electrical noise on the control loop.
✔ Dual-Current Coil: 2A Inrush, 0.02A Hold
DT-200 draws 2.0A for ~0.1s to pull in, then drops to 0.02A holding current via internal economizer. Coil temp rise <40K at 1200 cyc/h - far cooler than old MZD1/MZD2 AC magnets. Magnet life ≥15,000 working hours
Products Description
The MWZ200-160 is the DC-powered variant of the MW(Z) electromagnetic drum brake family - "MW" = AC version, "MWZ" = DC version, identical brake frame, different magnet electrical design. It is the right spec when:
Site already runs a DC control bus (mine hoist, DC crane, battery-powered equipment)
Acoustic noise or AC arc sparking is unacceptable (underground, paint shop, instrument room)
You want JZ-200's 160 N·m and 1200 cyc/h, but on DC 220V/110V/24V
Retrofitting legacy TJ2-200/200 fleets where the panel can add a small rectifier
Typical Applications:
- Mine hoist & incline winch - headframe safety brake, DC 220V straight from drive
- Underground conveyor stop (low-noise, no AC arc)
- 5–10t overhead crane trolley / hoist on DC supply
- Metallurgy transfer car, rolling mill aux drive
- Chemical plant jib crane (pair with Ex d rectifier enclosure)
- Legacy AC brake upgrade where DC bus exists
Technical Specifications
|
Parameter |
Value |
|---|---|
|
Model |
MWZ200-160 |
|
Brake Type |
Normally closed, spring-applied, DC electromagnet release |
|
Brake Wheel Diameter |
Ø200 mm |
|
Rated Braking Torque |
160 N·m (adjustable 120–180 N·m via spring nut) |
|
Shoe Retraction (total) |
0.6 mm (equal-clearance, auto-compensated) |
|
Electromagnet Model |
DT-200 / DTZ-200 (DC linear, energy-saving) |
|
Magnet Rated Suction |
1000 N |
|
Magnet Stroke (Max / Initial) |
6 mm / 3 mm |
|
Operating Frequency |
1200 cycles/h |
|
Coil Voltage |
DC 220V (DC 110V / 24V optional) |
|
Coil Current (Inrush / Hold) |
2.0 A / 0.02 A |
|
JC (Duty Cycle) |
0–100% (continuous hold OK) |
|
Total Weight |
30 kg (brake ~23 kg + magnet ~7 kg) |
|
Lining |
Asbestos-free, snap-in, μ≥0.45, change at ≤4mm remain |
|
Ambient Temp. |
-25°C to +40°C (standard), -20°C to +55°C some variants |
|
Humidity |
≤90% RH, altitude ≤2000 m |
|
Protection |
Magnet IP54 (enclosed), frame painted |
|
Standards |
JB/ZQ 4388, JB/T 7685-2006 |
|
Mounting |
Horizontal base, A=270mm, left/right interchangeable |
|
Options |
DC110V/24V coil, rectifier module (AC380→DC220), Ex d enclosure, manual release, limit switch, corrosion paint |
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