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*(.%
35
lights between 98% and 102% of the
pickup TOC setting. If the relay is set to
blink between power up and pickup,
look for the LED to be on most or all of
the time to indicate pickup.
Reduce the current applied, verifying
that at a value between 95% and 100%
of the pickup TOC, the relay Pickup
LED turns off or blinks if set to blink.
Verification of Operating Time
Because the Digital self powered series
of relays has many different curve
characteristics, the basic test instruction
will be given and the data for each of
the curves can be found in Table 1.
With the relay still connected as
indicated in Figure 23 or 24, set the time
overcurrent unit to minimum pickup and
set the corresponding time dial to 5.
Successively apply currents of 2, 5, and
10 times pickup TOC, verifying that the
operating times are within the margins
indicated in Table 1.
Note
Time measured in seconds
Table 1: Pickup Times for Varying Multiples of Pickup (MPU)
MPU
CURVE*
2
5
10
IAC 51
3.62 - 4.005
1.69 - 1.86
1.19 - 1.32
IAC 53
6.66 - 7.36
1.25 - 1.37
0.687 - 0.759
55-ST
0.298 - 0.330 0.155 - 0.17
0.133 - 0.14
57-MT
20.4 - 22.62
8.82 - 9.75
5.7 - 6.3
66-LT
42.7 - 47.2
17.28 - 19.1
10.78 - 11.9
75-ST
0.748 - 0.827 0.3113 - 0.344
0.244 - 0.2707
IAC 77
6.49 - 7.17
0.859 - 0.954
0.266 - 0.296
95-ST
0.895 - 0.994 0.356 - 0.396
0.276 - 0.303
IEEE Inverse
3.59 - 3.99
1.59 - 1.76
1.12 - 1.25
IEEE Very Inverse
6.51 - 7.24
1.21 - 1.34
0.64 - 0.71
IEEE Ext. Inverse
8.76 - 9.73
1.18 - 1.32
0.374 - 0.412
IEC Inverse
4.73 - 5.26
2.0 - 2.22
1.39 - 1.54
IEC Very Inverse
6.31 - 7.014
1.56 - 1.73
0.69 - 0.768
IEC Ext. Inverse
12.3 - 13.7
1.51 - 1.67
0.369 - 0.41
Definite Time
4.71 - 5.24
4.71 - 5.24
4.71 - 5.21
12T
1.175 - 1.31
0.191 - 0.212
0.051 - 0.056
* TD = 5
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...