GOST 24126-80 PDF
Name in English:
GOST 24126-80
Name in Russian:
ГОСТ 24126-80
Power transformer on-load tap-changing devices. General specifications
Full title and description
GOST 24126-80 — "Устройства регулирования напряжения силовых трансформаторов под нагрузкой. Общие технические условия" (English: "Power transformer on-load tap-changing devices. General specifications"). This standard sets general technical requirements for built-in on-load tap-changing (OLTC/RPN) devices used in power transformers of general purpose.
Abstract
GOST 24126-80 defines classification, main parameters, technical requirements, completeness, acceptance rules, test methods, marking, packaging, transport and storage, and manufacturer guarantees for on-load tap-changing devices (RPN) intended for incorporation in power transformers. It specifies permitted climatic categories, exclusions (special converter or reactor transformers and thyristor/static thyristor commutation devices), and aligns with related CMEA and IEC publications where noted.
General information
- Status: In force (Действует).
- Publication date: Introduced by Gosstandart decision 24 April 1980; effective 01 January 1982.
- Publisher: Interstate / Mezhgosudarstvennyy standard (Межгосударственный стандарт), issued under the authority of Gosstandart (USSR era).
- ICS / categories: OKC / ICS: 29.180 (Transformers. Reactors); KGS (classifier): E64 (Transformers).
- Edition / version: Original designation GOST 24126-80 with subsequent amendments/updates registered in IUS (notably amendments listed in 1987 and 1990 / Amd. 3.87 and Amd. 1.90). Limitation of validity removed by Gosstandart resolution No. 1077 dated 27 June 1991.
- Number of pages: 31 pages (standard text).
Scope
The standard applies to on-load tap-changing devices (RPN/OLTC) intended for built-in voltage regulation under load in general-purpose power transformers (those produced in accordance with relevant transformer standards such as GOST 11677-85). It does not cover RPNs used in special converter, mobile or mining substation transformers, RPNs for reactors, or devices where load switching is performed by thyristors (including static thyristor controllers). The standard is intended to unify technical requirements for RPNs across manufacturers and users.
Key topics and requirements
- Classification and type designations of RPN devices (single-phase, three-phase; with/without current-limiting elements; marking conventions for contact types and arc-extinguishing methods).
- Basic parameters and rated characteristics (voltage steps, number of taps, rated currents, allowable switching regimes and drive types — manual, local, remote, automatic).
- Technical requirements for construction, insulation, contact systems and arc extinguishing (oil, air, vacuum, or semiconductor arrangements where applicable).
- Climatic and category performance (climatic execution U1 by GOST 15150 and optional U and HL variants on customer demand; categories 1–4 as applicable).
- Acceptance rules, required tests and measurement methods, marking, packaging, transportation and storage, and manufacturer guarantees.
Typical use and users
Manufacturers of power transformers and OLTC/RPN equipment, transformer design offices, electrical utilities, power system equipment test laboratories, procurement and quality-assurance teams, and regulatory bodies involved in transformer production and deployment use this standard to specify, test and accept on-load tap-changing devices integrated in power transformers.
Related standards
Key related documents include GOST 11677-85 (power transformers general requirements), GOST 17500-72 (partially replaced by this standard for RPN devices), the corresponding CMEA / ST СЭВ 634 series (compatibility and conformity notes), and referenced IEC publications such as IEC guidance on tap-changer technical requirements (notably IEC 214 referenced historically).
Keywords
GOST 24126-80; on-load tap changer; OLTC; RPN; voltage regulating device; power transformer; tap-changing device; technical conditions; acceptance tests; climatic categories; arc extinguishing.
FAQ
Q: What is this standard?
A: GOST 24126-80 is a Soviet/Interstate standard titled "Устройства регулирования напряжения силовых трансформаторов под нагрузкой. Общие технические условия" that sets general technical requirements for on-load tap-changing (OLTC/RPN) devices used in power transformers.
Q: What does it cover?
A: It covers classification, main parameters, construction and technical requirements, testing and acceptance procedures, marking, packaging, transport and storage, and manufacturer guarantees for built-in OLTC devices in general-purpose power transformers; it also lists exclusions (special converter/reactor transformers and thyristor-based commutation).
Q: Who typically uses it?
A: Transformer manufacturers, OLTC/equipment producers, utilities, testing laboratories, and procurement/quality teams use the standard to specify and verify tap-changing devices for power transformers.
Q: Is it current or superseded?
A: Multiple official catalogs and normative libraries list GOST 24126-80 as "действует" (in force); the standard was introduced in 1980 and effective 01 January 1982, and its limitation of validity was removed by Gosstandart resolution No. 1077 dated 27 June 1991. Users should check national/regional normative registries for any later revisions or national replacements applicable in their jurisdiction.
Q: Is it part of a series?
A: Yes — the standard corresponds with CMEA / ST СЭВ 634-77 in many clauses and references related transformer standards (for example, GOST 11677 series) and IEC publications for certain technical requirements; it also replaced parts of earlier GOST 17500-72 regarding RPN devices.
Q: What are the key keywords?
A: On-load tap-changer, OLTC, RPN, voltage regulation, power transformer, tap-changing device, technical conditions, testing, marking, packaging, climatic categories.