S280-75-2
9
Figure 9.
Diagram of Form 3A tie board showing plug-in circuit board location. Form 3 tie boards are similar (see Figure 18), except some of
the terminals are missing or in a slightly different location.
From this point, phase- and ground-trip signals are very
similar, and only phase signals will be described.
The phase-trip No. 1 board circuitry, consisting of a three-
phase full-wave rectifier, which converts the ac input signal
from three phase to a single do signal. The do signal is
applied to the phase-trip No. 2 board which measures the do
level, and determines whether a fault current exists at the
recloser.
If the load current conditions are in the fault region, the mini-
mum-trip portion of the phase-trip No. 2 board switches on, allow-
ing the time-current curve circuits to start their programmed time
delay. The time-current curves are driven by the same do voltage
output of the phase-trip No. 1 board, and as a result higher fault-
current levels will result in a shorter time delay before tripping.
Содержание Kyle Type ME Series
Страница 34: ...Figure 51 Form 3A test points for battery charging circuitry Table 12 Type ME Electronic Recloser Control 34...
Страница 43: ...Figure 54 continued Form 2 Connections continued 43 S280 75 2...
Страница 44: ...Figure 55 Form 3 connection diagram below S N 5500 Form 3 Connections 44 Type ME Electronic Recloser Control...
Страница 45: ...Figure 55 continued Form 3 Connections continued 45 S280 75 2...
Страница 46: ...Figure 56 Form 3 connection diagram S N 5500 to 25999 46 Type ME Electronic Recloser Control Form 3 Connections...
Страница 47: ...Figure 56 continued 47 S280 75 2 Form 3 Connections continued...
Страница 48: ...Figure 57 Form 3A connection diagram 48 Type ME Electronic Recloser Control Form 3A Connections...
Страница 49: ...Figure 57 continued Form 3A Connections continued S280 75 2 49...