GMI D1033D - Calculation of Radiant Surfaces in Closed Cabinets; Surface Area Formulas

Technology for safety
15
D1000 series - Intrinsically Safe Isolators
Calculation of radiant surfaces in closed cabinets
Single cabinet
(all surfaces free of
contact)
Row of cabinets
Single cabinet
(one side on the wall)
Row of cabinets
(one side of each
on the wall)
A
1 A2
A
3
A
1 A2
A
3
A
1
A
3
A
1
A
3
A
1
A
3
A
1
A3
A
1
A
3
A
1
A
3
A
1 A2
A
3
A1 A2
A
3
A
TOT = 1 x A1 + 2 x A2 + A3
Formula for cabinet with no surfaces in contact with the wall
A
TOT = 2 x N x A1 + 2 x A2 + N x A3
(N = Number of cabinets placed side by side)
Formula for row of cabinets with no surface in contact with the wall
A
TOT = 1 x A1 + 2 x A2 + A3
Formula for cabinet with one side on the wall
Row of cabinet (one side by the wall)
ATOT = 1 x N x A1 + 2 x A2 + N x A3
Formula for row of cabinets with one side on the wall