Eaton HLDB3600FT33W

Technical Specifications

• Rated Frame Current: 600A
• Pole Count: 3P
• Rated Operational Voltage AC: 600V AC
• Rated Insulation Voltage: 800V
• Frequency Range: 50Hz / 60Hz
• Trip Unit Type: Fixed Thermal-Magnetic Trip FT
• Thermal Trip Range: Adjustable long-time overload protection matched to frame 600A rating
• Magnetic Trip Instantaneous Setting: Fixed short-circuit instantaneous protection
• Interrupting Rating: High withstand industrial breaking capacity for distribution branch circuits
• Terminal Configuration: Line & load lugs integrated
• Enclosure Code: W = Weatherproof outdoor compatible housing variant

Functional Features

1. Long-time thermal overload protection for continuous overcurrent load
2. Instantaneous magnetic short-circuit fault isolation to prevent busbar burnout
3. Visible contact status indicator window for circuit break/closed state identification
4. Standard mechanical lockout function for LOTO safety operation
5. Built-in arc quenching chamber to suppress internal arc flash energy
6. FT fixed trip unit eliminates calibration deviation under temperature fluctuation

Performance Parameters

• Operating ambient temperature range: -20°C ~ +60°C
• Storage temperature range: -40°C ~ +85°C
• Mechanical endurance: 10,000 open-close operation cycles
• Electrical endurance under rated load: 4,000 operation cycles
• IP protection grade base unit: IP20; suffix W upgraded environmental sealing
• Pollution degree compliance: Pollution Degree 3 industrial environment

Material Composition

• Main housing: Reinforced flame-retardant thermosetting polyester, UL94 V-0 fire resistance
• Moving & fixed contact: Silver-tungsten alloy composite contact tip
• Arc extinguishing plate: Galvanized steel stack cooling plate
• Trip mechanism: High-strength stainless steel spring assembly
• Terminal conductive body: Electrolytic copper with tin plating anti-oxidation layer

Structural Characteristics

• Integral one-piece molded main housing with split arc chamber compartment
• Front-mounted manual rotary operation handle
• Internal isolated trip compartment separated from power conductive path
• Rear busbar lug mounting interface for horizontal bus connection
• Standard mounting footprint compliant with IEC standard MCCB cabinet cutout

Working Principle

Advantage Highlights

1. Fixed FT trip unit delivers consistent protection threshold without field calibration
2. W suffix reinforced sealing resists dust, moisture and mild corrosive gas in semi-outdoor stations
3. High mechanical and electrical cycle lifespan reduces equipment replacement frequency
4. Standard LOTO lock structure complies with global industrial safety management standards
5. Universal cabinet mounting size compatible with mainstream low-voltage distribution cabinet brands

Applicable Industries

Installation Requirements

1. Mount vertically only, tilt angle not exceeding ±5° from vertical axis
2. Maintain minimum 50mm clearance top and bottom for heat dissipation
3. Torque terminal lugs to manufacturer specified 28 N·m tightening torque
4. Outdoor installation with W variant requires external rain shield auxiliary housing
5. Busbar connection must use tin-plated copper lugs to avoid contact resistance overheating

Operation & Maintenance Precautions

1. Do not modify internal trip mechanism or disassemble arc chamber without factory authorization
2. Quarterly inspection of contact indicator window for abnormal discoloration from arc damage
3. Annual torque retightening of power terminals to eliminate thermal expansion loose contact
4. For corrosive environment operation, clean housing surface dust every 6 months with dry compressed air
5. Replace unit immediately after short-circuit fault breaking regardless of visual integrity