Description
GE TH3366R
- Technical Specifications:
- Amperage: 600 A
- Voltage: 600 V AC max, 50/60 Hz
- Poles/Wires: 3-Pole, 3-Wire
- Type: Fusible (Class R cartridge fuses)
- Enclosure: NEMA 3R (Stainless Steel)
- Dimensions: 53.5 in H x 23 in W x 8.5 in D
- Functional Features: Quick-make/quick-break mechanism; spring-reinforced fuse clips; padlockable handle in OFF position (accepts 3 padlocks); visible blade contact position indication; coin-proof interlock; 3-point mounting system.
- Application Scenarios: Service entrance disconnect for large commercial buildings, industrial plant main switches, outdoor transformer secondary disconnects, generator set isolation switches.
- Performance Parameters: Horsepower rating up to 500 hp at 600 V AC (3-phase); interrupting capability dependent on installed Class R fuses; suitable for 4 AWG to 500 KCMIL Cu/Al conductors.
- Material Composition: Enclosure fabricated from corrosion-resistant stainless steel; internal copper alloy current-carrying parts; silver-faced knife blades; high-strength insulating barriers.
- Structural Features: Surface-mounted cabinet with gasketed door; donut-style operating handle compatible with hook stick; integral fuse holders with reinforced spring clips; self-leveling mounting feet.
- Working Principle: When the handle is operated, the quick-make/quick-break linkage rapidly closes or opens the knife-blade contacts within the fuse holders, ensuring minimal arcing. Fuses provide overcurrent protection by melting the element under fault conditions.
- Installation Requirements: Install on a rigid vertical surface capable of supporting >50 lbs weight; bond enclosure to system ground per NEC; torque termination lugs to spec for 500 KCMIL; ensure rain-tight conduit entry fittings.
- Usage Precautions: De-energize upstream source before opening; never operate under load if blades show signs of welding; replace fuses only with correctly rated Class R types; keep door interlock functional to prevent live access.
