Product Description
CR 78724-2 is a Crown OEM 175 amp contact set designed for electric lift truck applications. Features include bolt-on copper alloy contacts with silver flash-plated surfaces, rated for 175 amps continuous at up to 600VDC. Offered as a set of 2 for use in high-current applications, conforming to ASTM B124 and ASTM B700 material specifications.
Specifications
Electrical
| Max Voltage Rating | 600VDC |
Part Numbers
| OEM Part Number | CR 78724-2 |
Performance Specifications
| Duty Cycle | 85% continuous |
Frequently Asked Questions
Q: What are the voltage and amperage specifications for CR 78724-2?
A: The CR 78724-2 is a 2-piece contact set rated for 175 amps continuous at up to 600VDC. It is engineered for high-current applications in Crown electric lift trucks operating at standard industrial DC voltages.
Q: What material specifications and standards does CR 78724-2 meet?
A: The CR 78724-2 conforms to ASTM B124 and ASTM B700 material specifications. These standards define copper alloy purity and silver plating thickness, ensuring consistent electrical conductivity and corrosion resistance across production batches.
Q: What are the contact materials and surface plating of CR 78724-2?
A: The CR 78724-2 features copper alloy contacts with silver flash-plated surfaces. Silver plating reduces electrical resistance at the contact interface and improves resistance to oxidation compared to bare copper.
Q: What duty cycle rating does CR 78724-2 support?
A: The CR 78724-2 is rated for 85 percent continuous duty cycle. This specification means the contact set can sustain 175 amps for 85 percent of operating time, with allowance for lower-current phases in mixed-duty material handling cycles.
Q: When would CR 78724-2 contacts need replacement?
A: Replace CR 78724-2 contacts if voltage drop exceeds acceptable limits during full-load current draw, if visible arcing or heat damage appears, or if contact surfaces show heavy oxidation or pitting. These conditions indicate the contact set can no longer maintain low-resistance connections.