Ltb 72.5-170d1 B Manual ((hot)) Jun 2026

Live Tank Circuit Breaker LTB D 72.5 – 170 kV - Hitachi Energy

1. REPORT DATE: 01-MAY-1985 2. REPORT TYPE: Technical Manual 3. DATES COVERED: N/A 4. TITLE AND SUBTITLE: Operator's Manual for Trailer, Low Bed, 72.5-Ton Capacity, M172A1 (NSN 2300-00-249-3604) 5. AUTHOR(S): Headquarters, Department of the Army 6. PERFORMING ORGANIZATION NAME AND ADDRESS: N/A 7. SPONSORING AGENCY NAME AND ADDRESS: N/A 8. SUPPLEMENTARY NOTES: N/A **9. ABSTRACT: This publication is an Operator's Manual for the M172A1 Low Bed Trailer. The manual provides instructions for operation, preventive maintenance, and troubleshooting for the trailer under normal and extreme conditions. The manual covers the M172A1 trailer which is used to transport heavy equipment such as tanks, artillery, and construction equipment. It includes information on payload securing, coupling and uncoupling, driving maneuvers, and emergency procedures. 10. SUBJECT TERMS: M172A1, Low Bed Trailer, Heavy Equipment Transporter, Operator's Manual, 72.5-Ton, M172, M172A1 **11. CONTRACT OR GRANT NUMBER: N/A 12. SPONSORING AGENCY REPORT NUMBER: TM 9-2330-284-10 **13. NUMBER OF PAGES: 60 **14. MONITORING AGENCY NAME & ADDRESS: N/A **15. SECURITY CLASSIFICATION: UNCLASSIFIED **16. DISTRIBUTION STATEMENT: Distribution authorized to U.S. Government agencies and their contractors for the transportation of heavy equipment. Other requests for this document shall be referred to the commander, U.S. Army Tank-Automotive and Materiel Command. **17. DISTRIBUTION STATEMENT: N/A **18. NUMBER OF PAGES: 60 **19. NAME OF PERFORMANCE ORGANIZATION: Headquarters, Department of the Army **20. REPORT NUMBER: TM 9-2330-284-10

See the formatted report below.

Before we open the PDF, let’s decode the nomenclature:

Emphasizes precise mechanical and electrical connections during site setup. ltb 72.5-170d1 b manual

1-1. Scope 1-2. Maintenance Forms, Records, and Reports 1-3. Destruction of Army Materiel to Prevent Enemy Use 1-4. Reporting Equipment Improvement Recommendations (EIR)

). It is designed for rated voltages between 72.5 kV and 170 kV and can withstand breaking currents up to 40 kA. Hitachi Energy Publisher Core Technical Specifications Specification Rated Voltage 72.5 kV – 170 kV Rated Continuous Current Up to 3150 A Short-Circuit Breaking Current Up to 40 kA Operating Principle Auto-Puffer™ (Self-Blast interrupter) Insulation Medium Operating Mechanism Motor-charged spring (BLK, MSD, or FSA) Installation Standard Compliance IEC 62271-100, IEEE Operating Principles The LTB D1/B uses Auto-Puffer™ technology Live Tank Circuit Breaker LTB D 72

Without the , technicians risk improper reassembly, incorrect torque settings, and voiding any remaining warranty or liability insurance.

De-energize the control voltage before adjusting the auxiliary switch cams. Improper adjustment can cause false “breaker closed” signals. DATES COVERED: N/A 4

Note: I assume “LTB 72.5-170D1 B” refers to a high-voltage/medium-voltage switchgear/insulator/line tool component model (common naming style for outdoor/pole-mounted lightning arresters, vacuum interrupters, or sectionalizers). If you meant a different product (e.g., a specific manufacturer’s fuse, breaker, or test instrument), the structure below still applies; substitute model-specific specs from your manual.