| Code Section | Likely Meaning | |--------------|----------------| | | Could indicate a type series for Live Tank Breaker or a specific product line (e.g., "LT" for low tension or linear technology, though “B” may denote a revision). More often in HV, “LTB” refers to a family of live-tank circuit breakers. | | 72.5 | Rated voltage in kV (72.5 kV is a common high-voltage level for distribution/subtransmission). | | 170D1 | Likely the rated lightning impulse withstand voltage (170 kV BIL) or a specific design code. “D1” may refer to a mechanical endurance class (e.g., number of operations). | | B | Revision or mechanical variant (e.g., different operating mechanism, heater, or auxiliary switch configuration). |
Typically utilizes the FSA 1 or BLK 222 spring operating mechanisms. Standard Compliance: Designed according to IEC 62271-100 . Strengths & Design Features
If you need the full, 200+ page manual, you can find the complete LTB 72.5-170D1/B Circuit Breaker Manual on Scribd .
Getting a new piece of technology is exciting—until you realize you have no idea how to actually use it. If you’ve recently unboxed a device labeled , you might be looking for a comprehensive guide to get the most out of your hardware. ltb 72.5-170d1 b manual
The also serves as an innovative combined high-voltage switch-disconnector . Unlike a conventional circuit breaker with only two positions (ON/OFF), this design provides four fixed positions : ON, OFF, OFF-Disconnected, and Earthed. This allows for visible disconnection and grounding of the line side without additional hardware, simplifying substation design. However, the standard design required manual padlocking for the "OFF-Disconnected" position, a limitation that subsequent patents addressed with remote-operated blocking systems for enhanced safety.
Did your manual end up in the trash? Here are the solutions to the top three problems users face with this type of hardware:
Spring-loaded mechanism (such as the FSA or BLK mechanism). 4. Installation and Commissioning | | 170D1 | Likely the rated lightning
The LTB series utilizes an innovative engineering profile to handle severe short-circuit scenarios across extreme environmental conditions. The standard performance figures detailed within the product technical sheet include: : 72.5 kV to 170 kV. Maximum Breaking Current : 40 kA symmetrical. Continuous Rated Current : Up to 3150 A.
: Lower operating energy means less mechanical wear on the linkages, supporting columns, and concrete foundations, resulting in industry-leading system reliability. 3. Structure of the Operating Mechanism (BLK 222)
: The manual's troubleshooting section enables users to quickly identify and resolve issues, minimizing downtime and repair costs. | Typically utilizes the FSA 1 or BLK
Operating this high-voltage gear requires strict adherence to its product manual. The Hitachi Energy / ABB LTB D series documentation serves as an indispensable roadmap for safe installation, operation, and field maintenance. Design and Core Technology
A: Yes. Contact the OEM technical support with the 8-digit diagram number (usually printed in the lower right corner of the missing page, e.g., "D1-B-09").