Basler Electric BE1-79M - Manual (Page 30)

3-6 BE1-79M Functional Description 9170100990 Rev N
Table 3-3. Wide Range Power Supply Voltage Ranges
Power Supply Style Chart Identifier Nominal Voltage Voltage Range
Low Range L 24 Vdc 12 to 32 Vdc ∗
Mid Range J, K, Y
48, 125 Vdc,
120 Vac
24 to 150 Vdc,
90 to 132 Vac
High Range Z
125, 250 Vdc,
120, 240 Vac
62 to 280 Vdc,
90 to 270 Vac
∗ 14 Vdc required to start the power supply.
Relay operating power is developed by the wide range, isolated, low burden, flyback switching, solid-state
power supply. Nominal +12/–12 Vdc is delivered to the relay internal circuitry. Input (source voltage) for
the power supply is not polarity sensitive. A red LED turns ON to indicate that the power supply is func-
tioning properly.
Operational Characteristics
Due to the microprocessor-based design of the BE1-79M Multiple Shot Reclosing Relay, many of its
operational characteristics are not apparent in the block diagram. The remaining information in this sec-
tion is focused on the software-controlled features of the relay.
Power-Up
The application of operating power results in one of four states as illustrated in Figure 3-4. Depending on
conditions and the RESET delay setting, the interval from power application to the resultant state may be
from 10 to 1000 seconds or optionally from 1 to 100 seconds. When the resultant state is reached, the
relay fail output contacts open and the RELAY FAIL LED is extinguished.