GV2MP02 datasheet(44/64 Pages) SCHNEIDER

44 / 64 page

Manual Motor Starters, Controllers, and Protectors

Specifications

10/02

GV7 OPERATING CURVES

The current limiting capacity of the motor starter and protector is expressed by two curves which give,

as a function of the prospective short-circuit current (the current which would flow if no protection

devices were installed):

• The actual peak current (limited),

• The thermal stress (in A2s), i.e. the energy dissipated by the short-circuit in a conductor with a

resistance of 1

Ω.

Example: The real value of a 70 kA prospective short-circuit current limited by a GV7RS220 is 20kA

peak, see page 46.

PRC = Cross-linked polyethylene

Example 1: For a GV7RS220, the peak value is limited to 20 kA for a prospective Isc of 40 kA.

Example 2: For a GV7RS220, and with a prospective Isc of 40 kA, an I2t of 7.5 x 105 A2s is obtained,

which requires the use of a PVC insulated copper cable with a cross-sectional area of 10

mm2 (# 8 AWG).

Permissible Thermal Stresses for Cables (A2s)

S (mm2)

1.5

2.5

1016253550

AWG

#16

#14

#12

#10

PVC

Insulation

2.97 x 104

8.26 x 104

2.12 x 105

4.76 x 105

1.32 x 106

3.4 x 106

8.26 x 106

1.62 x 107

3.31 x 107

–

5.41 x 105

1.39 x 106

3.38 x 106

6.64 x 106

1.35 x 107

––

PRC

4.10 x 104

1.39 x 105

2.92 x 105

6.56 x 105

1.82 x 106

4.69 x 106

1.39 x 107

2.23 x 107

4.56 x 107

–

7.52 x 105

1.93 x 106

4.70 x 106

9.23 x 106

1.88 x 107

––

GV2MP02 Datasheet(PDF) 44 Page - Schneider Electric

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