H�i�g�h� � �V�o�l�t�a�g�e� �S�w�i�t�c�h�g�e�a�r� �a�n�d� �C�o�n�t�r�o�l�g�e�a�r� �P�a�r�t� �2�0�7� �S�e�i�s�m�i�c� �Q�u�a�l�i�f�i�c�a�t�i�o�n� �f�o�r� �G�a�s� � �I�n�s�u�l�a�t�e�d� �S�w�i�t�c�h�g�e�a�r� �A�s�s�e�m�b�l�i�e�s� �f�o�r� �R�a�t�e�d� �V�o�l�t�a�g�e�s� �A�b�o�v�e� �5�2� �K�v: 2007