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Capacitor Bank Access Scheme

The Capacitor Bank Access Scheme is used to prevent closure of the ground switch under load and ultimately gain access to the capacitor bank area after the capacitor bank has been grounded and fully discharged.

Initial Conditions: The breaker is normally closed with its respective interlock key "A" captive; the time delay key interlock has a vacant primary position with a "B" key captive in its secondary position; the ground switch is locked open with no key present it its LO position key interlock, while its LC position key interlock has a "C" key captive. The access gate is locked closed with no key present in its respective key interlock.

Switching Scenario: Gaining access to a grounded and discharged capacitor bank: open and lock the breaker thereby removing the "A" key, insert and turn the "A" key in the time delay primary position; after the predetermined time interval the "B" key will become available; use the "B" key to unlock the ground switch from the open position; operate the ground switch to the closed position and lock thereby removing the "C" key; use the "C" key to unlock the gate where this key will remain captive until the gate is again locked. Reverse to restore the initial condition.

Additional Schemes:
A / A1 / B / B1 / C / D / E / F / G / H / H1 / H2 / K / L / M / N / O / P / R / U.P.S. System / Capacitor Bank Access Scheme