OCS SECTIONING & SWITCHING / 25 kV AC · 1.5 kV DC CRCC CERTIFIED / TB/T · GB · IEC

Do in-service components built to old standards need replacement?

No. New editions govern new procurement; in-service equipment stays as designed

Short answer: No. The 2026 editions govern manufacture, procurement and inspection of new contracts. In-service equipment designed and manufactured to the previous editions remains valid - no immediate replacement is required.

Transition points

New contracts should cite the 2026 editions from the effective date. Stock and in-delivery products inspected under the old editions are delivered per contract terms. Design codes such as TB 10009-2016 remain in force without parallel change. Chuangwit supplies to the new standard system and offers grade cross-reference support for owners and designers.

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