IEC 62271-200A

IEEE C37

Type 2

Type 2C

Type 2B

B

Type of accessibility to a compartment

Access features

1 Interlock-based

Access is controlled by the construction of Opening for normal operation and maintenance, e.g. the switchgear, i.e. integrated interlocks fuse replacement. prevent impermissible opening. Access control via a suitable pro-cedure Opening for normal operation and maintenance, e.g. (work instruction of the operator) combined fuse replacement with a locking device (lock). Access only with tool for opening, special access procedure (instruction of the operator).

2 Procedure-based

3 ool-based

Opening not for normal operation or maintenance, e.g. cable testing.

4 Nonaccessible C

Opening not possible / not intended for operator,opening can destroy the compartment.This applies generally to the gas-filled compartments of gas-insulated switchgear. As the switchgear is maintenance-free and climate-indepen-dent, access is neither required nor possible

The notation IAC A FLR, I and t contains the abbreviations for the following values: 1 IAC Internal Arc Classification Distance between the indicators 300 mm, i.e. installation in rooms with access for authorized personnel, closed electrical service location Access from the front (F), from the sides (L = lateral) and from the rear (R) Test current = rated short-circuit breaking current (in kA) Internal arc duration (in seconds)

2A

3 FLR

4I 5t

What is the difference between the Type 2, Type 2C, and Type 2BC arc resistant ratings? o Type 2 rated switchgear has arc resistant construction on the front, back, and sides. Type 2C rated switchgear is Type 2 compliant but also includes arc resistant features or designs between compartments within a section or between adjacent vertical sections, except the main bus compartment. Type 2BC rated switchgear is 2C compliant but also has low voltage isolation. ABB SafeGear can meet IEEE C37.20.7-2007 Type 2, 2C, or 2BC arc resistant standards.