Technical Specifications

• Continuous Rated Dissipation Power: 300 W
• Peak Pulse Power Capacity: 1200 W (10 second maximum pulse duty cycle)
• Nominal Resistance Value: 158 Ω ±5% tolerance at 25°C ambient
• Connection Cable Length: 6 m factory pre-wired shielded cable
• Resistor Element Type: Wire-wound ceramic encapsulated power resistor
• Trigger Activation DC Bus Voltage Threshold: 780 VDC (compatible with 480VAC S700/AKD HV drives)
• Thermal Cutout Protection: 160°C bi-metal thermal fuse permanent disconnect
• Operating Ambient Temperature: -20°C to +40°C (power derate 15% above 40°C)
• Protection Enclosure Rating: IP20 cabinet-only installation
• Wire Gauge of Connection Cable: 14 AWG heat-resistant silicone insulated conductors
• Cable Shield: 85% coverage tinned copper braid full EMI shielding

Function Features

1. Absorbs regenerative motor energy during rapid deceleration to clamp DC bus voltage within safe operating range
2. Built-in one-time thermal fuse prevents resistor burnout under sustained overload conditions
3. 6-meter pre-assembled shielded cable eliminates field wiring resistance mismatch errors
4. DIN rail mountable compact aluminum housing for cabinet integration
5. Resistor ceramic encapsulation suppresses surface hot spot temperature rise

Performance Highlights

• Voltage clamping accuracy maintains DC bus fluctuation ≤ ±20 V during full regenerative deceleration events
• Thermal fuse triggers permanently at 160°C to eliminate fire hazard risk under continuous overload
• Wire-wound resistor element stable resistance value across -20°C to +120°C operating temperature range

Material Composition

• Resistor Core: Nickel-chromium alloy resistance wire wound on high-purity ceramic mandrel
• Encapsulation Medium: High-temperature magnesium oxide ceramic insulation compound
• Module Housing: Extruded black aluminum alloy heat sink enclosure
• Connection Cable Conductors: Oxygen-free copper with silicone high-temperature insulation
• Thermal Protection Component: Bi-metal alloy temperature-activated fuse element

Structural Characteristics

1. Vertical DIN rail mount aluminum heat sink housing with horizontal cooling fins
2. Pre-terminated shielded cable routed through strain relief sealed cable gland
3. Internal resistor element fully encapsulated to eliminate hot surface exposure
4. Screw terminal connection block on drive side cable end for easy amplifier wiring
5. Internal ground bonding of cable shield to aluminum heat sink housing

Working Principle

Advantage Highlights

1. External high-power resistor reduces internal drive heat generation, extending servo amplifier service life
2. Pre-calibrated fixed resistance value matched to Kollmorgen 480V high-voltage drive platform
3. Factory 6-meter shielded cable eliminates field wiring resistance measurement errors
4. Compact DIN rail form factor requires minimal cabinet installation space
5. Permanent thermal fuse provides passive fire safety protection without external monitoring circuits

Applicable Industries

Installation Requirements

1. Mount HPA module on standard 35 mm DIN rail with minimum 100 mm vertical airflow clearance
2. Separate resistor cable low-voltage wiring from high-current servo power cables by minimum 120 mm
3. Bond cable shield drain wire to cabinet dedicated PE earth bar at drive terminal end
4. Install module in upper cabinet zone to avoid heat convection rising to sensitive drive electronics
5. Do not stack other heat-generating electrical components directly above HPA resistor assembly

Operation Precautions

1. Peak pulse power operation limited to maximum 10 second continuous duty cycle
2. Ambient cabinet temperature above 40°C requires 15% continuous power derating
3. Never bypass internal thermal fuse for continuous overload operation
4. Allow minimum 30-minute cool-down period after full peak power pulse event before maintenance access
5. Prevent direct contact with aluminum heat sink surface during active power dissipation operation