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350 FEEDER PROTECTION SYSTEM – QUICKSTART GUIDE
ELECTRICAL INSTALLATION
CHAPTER 2: INSTALLATION
NOTE
NOTE:
An external switch, circuit breaker, or other protective device
must
be connected near to
the equipment.
Figure 2-36: Control power connection
Contact inputs
External contacts can be connected to the relay’s ten (10) digital inputs. These contacts are
wet only.
The inputs can be programmed to different thresholds depending on the DC voltage (17,
33, 84, 166).
CAUTION:
Ensure correct polarity on contact input connections and do not connect any contact
input circuits to ground or else relay hardware may be damaged.
A wet contact has one side connected to the positive terminal of an external DC power
supply. The other side of this contact is connected to the required contact input terminal. In
addition, the negative side of the external source must be connected to the relay’s DC
negative rail at Terminal C11. The maximum external source voltage for this arrangement
is 300 V DC.
Figure 2-37: Wet contact connections
P
POWER
OR BRAIDED WIRE
OR BRAIDED WIRE
HEAVY COPPER CONDUCTOR
HEAVY COPPER CONDUCTOR
GROUND BUS
GROUND BUS
SWITCHGEAR
-
+
G
R
O
U
N
D
B2
A1 B1
+
-
C
H
A
S
S
IS
RELAY
CONTROL
898735.CDR
898735.CDR
CONTROL
POWER
Wet Contact Connection
3
6(5,(6
RELAY
C1
Contact Input 1
Contact Input Common C11
V DC Power
Supply
LOGICIN.CDR
