*(.%
36
For the Definite Time Characteristics,
based on any current input, the time
should be half of the maximum value.
Verification of Time Dial
Set the relay at the minimum pickup
TOC and verify that with an input
current of five times (5x) pickup TOC,
the operating time is between the
margins shown in Table 2.
Table 2: Pickup Times for Varying Time Dials
Time Dial
CURVE*
10
7
3
1
IAC51
3.64 - 4.05
2.42 - 2.69
0.996 - 1.106
0.372 - 0.413
IAC53
2.73 - 3.03
1.78 - 1.98
0.742 - 0.824
0.025 - 0.028
55-ST
0.29 - 0.32
0.21 - 0.23
0.10 - 0.12
0.058 - 0.064
57-MT
17.3 - 19.3
12.2 - 13.65
5.27 - 5.86
1.783 - 1.98
66-LT
33.9 - 37.7
24.1 - 26.7
10.3 - 11.4
3.46 - 3.848
75-ST
0.577 - 0.641
0.424 - 0.471
0.2 - 0.221
0.09 - 0.1
IAC77
1.81 - 2.013
1.2 - 1.33
0.545 - 0.605
0.228 - 0.253
95-ST
0.69 - 0.767
0.49 - 0.544
0.23 - 0.252
0.102 - 0.11
IEC Inverse
3.94 - 4.37
2.79 - 3.1
1.21 - 1.34
0.431 - 0.478
IEC Very Inverse
3.06 - 3.402
2.17 - 2.415
0.95 - 1.05
0.332 - 0.369
IEC Ext. Inverse
2.95 - 3.284
2.109 - 2.33
0.913 - 1.015
0.329 - 0.364
IEEE Inverse
3.108 - 3.45
2.206 - 2.45
0.95 - 1.06
0.345 - 0.384
IEEE Very Inverse
2.39 - 2.635
1.69 - 1.88
0.745 - 0.828
0.273 - 0.304
IEEE Ext. Inverse
2.32 - 2.58
1.65 - 1.84
0.734 - 0.815
0.266 - 0.296
Definite Time
9.5 - 10.5
6.65 - 7.31
2.83 - 3.15
0.95 - 1.05
12T
0.351 - 0.3865 0.256 - 0.282
0.124 - 0.137
0.0664 - 0.073
* MPU = 5X
Summary of Contents for DIAC
Page 29: ...28 FIGURE 18 DIAC and DSFC External Internal Connections...
Page 30: ...29 FIGURE 19 DIFC External Internal Connections...
Page 31: ...30 FIGURE 20 DIAC Panel Mounting and Drilling...
Page 32: ...31 FIGURE 21 DIFC Panel Mounting and Drilling...
Page 33: ...32 FIGURE 21A SURFACE MOUNTING DIFC...
Page 34: ...33 FIGURE 22 DSFC Panel Mounting and Drilling...
Page 42: ...41 FIGURE 27 9819647 8919648 DIAC Front and Rear Views...
Page 43: ...42 FIGURE 28 8919652 8919653 DIFC Front and Rear Views...
Page 44: ...43 FIGURE 29 8919632 8919661 DSFC Front and Rear Views...