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7. Connections
EAFR-101S Arc Point Sensor Relay User Manual
MN026005EN February 2016 www.eaton.com
7.1 Outputs
7.1.1 Trip Relays T1, T2, and T3
The EAFR-101S relay has integrated trip relays T1 and T2
for tripping of the circuit-breakers. T1 and T2 relays are nor-
mally open type (NO) relays.
Trip relay T3 is a (NO) trip relay that operates anytime the
T1 or T2 relay operates and can be used either for tripping
one more disconnecting device or for a trip alarm to local or
remote monitoring and alarming system.
7.1.2 Binary Output BO1, BO2, and BO3
Three binary outputs are available (+ 24 Vdc). The binary
output function can be configured using the dipswitches
(see Section 3.5: Dipswitch Settings.
otee:
N
The binary output is polarity sensitive (see Section 8:
Wiring Diagram).
7.1.3 System Failure (SF) Relay
The SF relay is a form C type (NO/NC) and is energized in
the healthy condition. Whenever the EAFR-101S detects a
system error or disconnection of the auxiliary power sup-
ply, the contact changes its state. The state of the SF relay
remains the same until the EAFR-101S returns to a healthy
condition and SF relay is again energized.
7.2 Inputs
7.2.1 Arc Sensor Channels S1, S2, S3, and S4
The EAFR-101S has four arc point sensor channels. A maxi-
mum of three arc point sensors (type EAFR-01) may be con-
nected to each channel.
For details on sensors refer to Section 4: Arc Sensors.
7.2.2 Binary Inputs BI1, BI2, BI3, BI4, BI5, and BI6
The EAFR-101S contains six binary inputs. Typically, BI1
and BI2 are reserved for the breaker position signal informa-
tion. In the most applications, the BI3 is responsible for the
receiving over-current from the EAFR-110P. The BI4, BI5,
and BI6 can be used for receiving a trip signal or arc light
signal (see Section 3.5: Dipswitch Settings).
otee:
N
When the EAFR-101S receives an over-current signal
from a non-Eaton device, the actual operation time
depends on the operation time of the external device
and so the total operational time cannot be specified
or guaranteed.
The inputs are activated by connecting a dc signal exceed-
ing the specified nominal threshold level of the correspond-
ing input. The nominal threshold level is 24 Vdc. The actual
activation of the binary input occurs at 80% of the specified
nominal threshold value (i.e. 16 Vdc).
7.3 Auxiliary Voltage
The auxiliary power supply voltage is (110-220) Vac / (125-
250) Vdc. After powering up the relay, protection is active
and operational within 50 ms.