Basler Electric BE1-11t - Manual (Page 224)

212 9424200995 Rev H
Figure 165. Rear-Panel Connections with Fiber Optic Ethernet
Terminal Blocks
J-style cases use two sizes of terminal blocks.
The terminal blocks used for current sensing connections use #8-32 screws with lock washers. The lock
washer is an integral part of the current-sensing wiring system and must not be removed. Without the lock
washer, the terminal screw may bottom out and prevent a tight fit against the lug. The torque applied to
the terminal screws should not exceed 15 inch-pounds (1.69 N
•m). Each terminal block screw
accommodates a lug no wider than 0.344 inches (8.6 millimeters).
All other terminal blocks use #6-32 screws. The torque applied to these screws should not exceed 12
inch-pounds (1.35 N
•m). Each terminal block screw accommodates a lug no wider than 0.320 inches (8.1
millimeters).
CT Polarity
CT polarity is critical to the proper operation of the BE1-11t. The following provides fundamental
information on CT polarity and protection systems.
By ANSI convention, current transformer polarity will face away from the protected winding of a
transformer, motor, generator, or reactor, and away from the contacts in a circuit breaker. Therefore,
primary current flow towards the winding or contacts (direction of protected zone) will result in a
secondary current out X1, in phase with the primary (see Figure 166 and Figure 167).
!
WARNING
BE1-11
C12 C11 C10 C9 C8 C7 C6 C5 C4 C3 C2 C1 C13 C14 C15 C16 C17 C18
V A OUT 2 OUT 3 OUT 4 OUT 5 OUT 1 ALARM V B V C V X V X N
E12 E11 E10 E9 E8 E7 E6 E5 E4 E3 E2 E1
OUT 8 OUT 7
IN5 IN6 IN7
OUT 6
A8 A7 A6 A5 A4 A3 A2 A1
IRIG PWR
C A B
RS-485
GND
B8 B7 B6 B5 B4 B3 B2 B1
IN1 IN2 IN3 IN4
D1 D3 D5 D7
IA1 IB1 IC1 IG1
IA1
D2 D4 D6 D8
IB1 IC1 IG1
IA2
F2 F4 F6 F8
IB2 IC2 IG2
F1 F3 F5 F7
IA2 IB2 IC2 IG2
ETHERNET
TX RX
P0061-46
Terminals and Connectors BE1-11t