Basler Electric BE1-79A - Manual (Page 25)

9310200990 Rev J BE1-79A Functional Description 3-3
Table 3-3. Contact Sensing Inputs Description for ACR11B Operation
Input Terminals Description
V1 3,4 Typically connects to a 52a contact, which results in voltage being sensed
when the breaker is closed. If V1 senses voltage within three seconds after the
Reset 1, 2, 3, or 4 timer expires, a reset will be initiated. If the relay is in
lockout, a reset will be initiated anytime V1 senses voltage. (E Reset)
V2 6, 7 Voltage sensed at this input causes the relay to start a reclose sequence.
(Motor)
V3 11, 12 Used to monitor the 52b contact while the relay is in a reset condition. When
V3 senses voltage, the relay initiates a reclose sequence. (E Operate)
V4 11, 17 Connects to a 52b contact, which results in voltage being sensed when the
breaker is open. This input is typically used to provide an anti-pump feature. If
voltage is removed from V4 during a reclose attempt, the anti-pump feature
will prevent a further reclose attempt until the next reclose set time is reached.
This prevents multiple reclose attempts for a single reclose setting. (Z)
V5 5, 6 Internally connected to the relay power supply terminal. A loss of sensing
voltage at this input causes all necessary data to be stored in memory and all
contacts to return to their de-energized or “in-the-box” state.
This momentary-action switch clears the front-panel In Sequence or Lockout LEDs and restores the relay
to a rest condition. The reset switch performs the same function as the manual clutch release on the
General Electric ACR11 relay. Operating power must be applied to terminals 5 and 6 in order for a reset
to occur.
Reset Switch
The communication port is a standard RS-232 (DB-9) female connector located on the front panel. This
port provides the means to read and configure BE1-79A settings.
Serial Communication Port
Microprocessor
All reclosing and communication functions are coordinated by the microprocessor. The BE1-79A uses an
eight-bit microprocessor with integral ROM (read-only memory) and RAM (random access memory). The
microprocessor is monitored by a watchdog circuit that resets the microprocessor if a problem is detected.
Outputs
The BE1-79A has 10 outputs. The function of each output depends on the operating configuration of the
relay. Tables 3-4 and 3-5 provide a description of each output for each relay configuration.
Table 3-4. Outputs Description for ACR11A Operation
Output Terminals Description
C1 — Not used in this application.
C2 13, 14 Closed during reset and open when voltage at input V3 is sensed. During a
reclose sequence, C2 will remain open until the relay returns to reset. (E1)
C3 15, 16 Functions as a programmable alarm contact. It can be set to function as a
relay fail output or a combination relay fail/lockout output. a detailed
explanation is provided in Section 4, Communication Commands, Command
Descriptions, Alarm Output Command. (JK)
C4 17, 18 Used in conjunction with the anti-pump function. C4 is closed when voltage is
sensed at input V2. (Z2)
C5 19, 20 Used in conjunction with the anti-pump function. C5 is closed when voltage is
sensed at input V2. (Z3)