Common use of Switchgear Clause in Contracts

Switchgear. The switchgear buses shall be connected in a double-ended arrangement with a normally open tie breaker. Low‑voltage switchgear shall have a copper bus. The low‑voltage switchgear breakers shall be electrically operated, draw out type. The switchgear will be located indoors or in prefabricated electrical equipment enclosures. Control of incoming low‑voltage switchgear breakers and the bus tie breaker shall be provided at the switchgear. All 480-V main and tie breakers shall typically be operated by remote control from the DCS CRT console. All feeder breakers to MCCs and distribution panels shall also be electrically operated. The protective system shall include a communication interface to the plant DCS for system monitoring. Ring type current transformers shall be furnished for instrument transformers. The thermal and mechanical ratings of the current transformers shall be coordinated with the circuit breakers. Their accuracy rating shall be equal or higher than ANSI standard requirements. The standard location for the current transformers on the bus side and line side of the breaker units shall be front accessible to permit adding or changing transformers without removing high‑voltage insulation connections.

Switchgear. The switchgear buses shall be connected in a double-ended arrangement with a normally open tie breaker. Low‑voltage switchgear shall have a copper bus. The low‑voltage switchgear breakers shall be electrically operated, draw out type. The switchgear will be located indoors or in prefabricated electrical equipment enclosures. Control of incoming low‑voltage switchgear breakers and the bus tie breaker shall be provided at the switchgear. All 480-V 480‑V main and tie breakers shall typically be operated by remote control from the DCS CRT console. All feeder breakers to MCCs and distribution panels shall also be electrically operated. The protective system shall include a communication interface to the plant DCS for system monitoring. Ring Ring-type current transformers shall be furnished for instrument transformers. The thermal and mechanical ratings of the current transformers shall be coordinated with the circuit breakers. Their accuracy rating shall be equal or higher than ANSI standard requirements. The standard location for the current transformers on the bus side and line side of the breaker units shall be front accessible to permit adding or changing transformers without removing high‑voltage insulation connections.