Breaker Status And Control Connections; Aux 1 Contacts; Aux 2 Contacts; Aux 3 Contacts - GE Multilin 565 Instruction Manual

INSTALLATION

Breaker Status and Control Connections

The Feeder breaker status indications are given to the Relay
from the auxiliary 52a/52b contacts on the breaker. The
connections are made to terminals 9 and 10 for the Breaker
open indication (52b) and at terminals 11 and 10, for breaker
closed (52a) as shown in Figure 2.5. The breaker status input
connections must be made.

Aux 1 Contacts

The contacts of the Aux 1 are 43 N.O., 59 common, 46 N.C.
This relay function is programmable.

Aux 2 Contacts

The contacts of Aux 2 are 44 N.O., 60 common, 47 N.C. This
relay function is programmable.

Aux 3 Contacts

The contacts of Aux 3 are 45 N.C., 61 common, 48 N.O. This
relay is hot coil failsafe and monitors control power loss, and
trip coil supervision. It is not programmable.

Aux 4 Contacts

The contacts of Aux 4 are 30 N.O., 31 common, 32 N.C. This
relay activates on a Breaker Discrepancy function if enabled.
** Available only with Option Card **.
Block Tap Changer ( 575 only )
The contacts of the Block Tap Changer are 16 N.O., 15
common, and 26 N.C. This relay operates to block operation
of an external transformer tap changer. It also acts as "Auto
Reclosure in Progress" indicator.

Programming Port

A programming port (RS232 type) is supplied on the front
panel of the relay. This port can be connected to a computer
which then can be used to store setpoints in and read
measured values from the relay.
This port has priority over the communication port on the
rear. If the relay senses the DTR line being pulled high, all
communications at the rear are suspended.
The connection to a computer is made via a standard
modem type cable and is shown in figure 2.3.
2-4
Figure 2.3 Computer Interface Cable for RelayCom
Package

Communication Port

Up to 32 relays can be daisy-chained together and con-
nected to a computer or a programmable controller using the
RS485 type communication port in the rear. A shielded
twisted pair should be used and proper polarity has to be
observed. ie. positive to terminal 65, negative to terminal 66,
while the shield is connected to terminal 67.
After each 565/575 Relay is assigned a unique address, the
master device (computer) can read measured values or
store setpoints. The address is assigned via the keypad on
the front panel. See also Programming Port information
above.

MTM Port

The MTM port, terminals 67, 68, and 69, is required when
connecting the separate MTM Metering Transducer Module
to the 565/575 Relay. The MTM receives current and voltage
inputs and calculates KW, KVAR, PF and transmits the
information to the 565/575 Relay. The connections are made
by means of a shielded twisted pair of length no greater than
50 ft. MTM port polarity must be observed. ie. positive to 68,
negative to 69, and the shield to 67. ** Available only with
Option Card **.

Printer Port

The printer port can be used to connect a printer to record
event recording output. This is a 1200 baud serial output with
even parity and requires the printer to accept serial data. The
word length is eleven bits with the data frame constructed as
follows: there is a start bit (Low) , eight data bits (LSB to
MSB), an even parity bit, and a stop bit (High). The connec-
tion is made at the rear of the relay via a 9 pin D-type null
modem connector. The pinout is as follows: