Detailed Product Description of SEW BW027-006

SEW BW027-006 is a power braking resistor in the SEW BW series. It is specifically designed for 3.0–7.5kW servo/frequency conversion systems, used to quickly discharge the regenerated electrical energy of the motor, stabilize the DC bus voltage, and protect the power devices of the driver. It is suitable for medium inertia, frequent braking, and potential energy load conditions. 

I. Basic Information

Product Series: BW Series Brake Resistor (Brake Resistor)

Full Model: BW027-006

Variant Model: BW027-006-T (Metal Mesh Cover, IP54 Protection)

Product Type: Wound-Resistor, Aluminum Shell Wave Heat Dissipation, With Temperature Control Protection

Manufacturer: SEW-EURODRIVE (Germany)

Compatible Equipment: SEW MOVIDRIVE, BTS20, MOVITRAC, MDX61/60 Series Drives

Application Scenarios: Rapid Braking, Frequent Start/Stop, Potential Load (Lifting Platform, Conveyor), Medium-Inertia Equipment

Protection Grade: IP20 (Standard) / IP54 (-T Type)

Cooling Method: Natural Cooling (Optional Forced Air Cooling)

II. Model Meaning Explanation

BW: Brake Resistor (Brake Resistor) Series

027: Nominal Resistance Value 27Ω (Ohm)

006: Rated Power 600W (0.6kW)

III. Core Technical Parameters

1. Electrical Parameters

Rated Power (PR): 600W (Continuous, 100% ED)

Peak Power (PP): 6kW (Short Time, 10s, 10% ED)

Nominal Resistance (R): 27Ω ±5%

Voltage Rating: 800V DC (Compatible with 300–600V DC Bus)

Insulation Class: F Grade (155℃)

Temperature Switch: Built-in Normally Closed 85℃ Temperature Control, Overheating Cut-off, Linked Drive Alarm

Maximum Temperature Rise: 375℃ (Resistance Wire)

Shell Temperature: ≤120℃ (Safe Contact)

2. Physical Parameters

Package: Aluminum Shell Wave Heat Dissipation (BW027-006) / Metal Mesh Cover (BW027-006-T)

Size (W×H×D): Approximately 250×150×100mm

Weight: Approximately 3.0kg

Installation Method: Wall-mounted, Vertical Installation

Connection Terminals: 2×M6 Screw Terminals

3. Environmental Characteristics

Operating Temperature: -25℃ ~ +45℃

Humidity: 5–95% (No Condensation)

Vibration Resistance: Industrial Grade, Compatible with Machine Tools, Lifting Equipment

Life Span: 10,000 Hours (Full Load)

IV. Functions and Advantages

1. Medium Power Braking Capacity

600W/27Ω: Compatible with 3.0–7.5kW Servo / Variable Frequency Systems

Peak 6kW: Satisfy Medium-Inertia, Frequent Braking, Heavy Load Lowering

Low Inductance Design: Does Not Interfere with Servo Control, Precise Positioning

2. Safe and Reliable

Dual Protection: 85℃ Temperature Switch + High Insulation Voltage

Industrial Grade Material: High-Temperature Resistance Wire, Corrosion-Resistant Shell

Long Life: Solid State Resistance, No Aging, No Maintenance Required

3. Strong Compatibility

SEW Original: Directly Matched with MOVIDRIVE, BTS20, MDX60 Series

Voltage Compatibility: 300V/600V DC Bus Universal

Installation Flexibility: Vertical Installation, Forced Air Cooling Optimization, Multiple Units Parallel Expansion

4. Maintenance Convenience

Status Monitoring: Temperature Switch Connected to Drive BRK Terminal

Replacement Convenient: Standard Size, Direct Replacement with Same Specification Resistors

No Maintenance Required: No Consumables, Long-Term Stable Operation

V. Typical Applications

Compatible Power: 3.0–7.5kW Variable Frequency / Servo Drives

System Configuration: Drive + BW027-006 + Servo / Variable Frequency Motor

Typical Conditions:

Small and Medium Machine Spindle, Servo Axis Braking

Lifting Platform, Parking Garage, Conveyor Potential Load

Emergency Stop for Fans, Pumps with Medium-Inertia Equipment

Frequent Start/Stop, Forward/Reverse of Packaging, Printing, Textile Equipment

VI. Selection and Installation Tips

Power Matching: Braking Power ≤ 600W (Continuous) Resistance matching: The driver braking unit is recommended at 27Ω

Voltage matching: DC bus ≤ 600V DC

Heat dissipation: Vertical installation, spacing ≥ 50mm, forced air cooling is preferred

Wiring: Short, thick, straight wiring (≥ 4mm² cable), reduces voltage drop and interference

Protection: Temperature control switch connected to the driver's BRK terminal to achieve overheat protection

VII. Order Information

Model: BW027-006 (aluminum case, IP20)

Variant: BW027-006-T (net cover, IP54)

Order number: 08224226

Guarantee: 12 months

Standard equipment: Resistance body, installation screws, temperature control switch wire

VIII. Comparison with the same series

BW012-050: 1.2kW / 50Ω (suitable for 2.2–5.5kW)

BW027-006: 600W / 27Ω (current) (suitable for 3.0–7.5kW)

BW027-003: 600W / 3Ω (high current, low resistance)

BW018-035: 3.5kW / 18Ω (higher power)