Teleprotection - GE M60 Instruction Manual

CHAPTER 5: SETTINGS
unreturned messages. This function counts all the outgoing messages and a separate counter adds the messages have
failed to return. When the unreturned messages counter reaches the user-definable level specified by the
setting and within the user-defined message count
ALARM CH1 THRESHOLD
FlexLogic operand is set.
UNRET ALM
When the total message counter reaches the user-defined maximum specified by the
setting, both the counters reset and the monitoring process is restarted.
COUNT
Configure the operand to drive an output contact, user-programmable LED, or selected communication-based output.
Latching and acknowledging conditions, if required, are programmed accordingly.
The unreturned messages alarm function is available on a per-channel basis and is active only in the ring configuration.
The total number of unreturned input and output messages is available as the
 UNRETURNED MSG COUNT CH1

5.3.17 Teleprotection

SETTINGS  PRODUCT SETUP  TELEPROTECTION
 TELEPROTECTION

This option is available when an Inter-Relay Communications card is specified at the time of ordering (see
the Order Code tables). With the option, direct inputs/outputs display by default. When you enable the
teleprotection feature, direct I/O is not visible.
Digital teleprotection transfers protection commands between two or three relays in a secure, fast, dependable, and
deterministic way. Possible applications are permissive or blocking pilot schemes and direct transfer trip (DTT).
Teleprotection can be applied over any analog or digital channels and any communications media, such as direct fiber,
copper wires, optical networks, or microwave radio links. A mixture of communication media is possible.
Once teleprotection is enabled and the teleprotection input/outputs are configured, data packets are transmitted
continuously every 1/4 cycle (3/8 cycle if using C37.94 modules) from peer-to-peer. Security of communication channel
data is achieved by using CRC-32 on the data packet.
Teleprotection inputs/outputs and direct inputs/outputs are mutually exclusive. As such, they cannot be used
simultaneously. Once teleprotection inputs and outputs are enabled, direct inputs and outputs are blocked,
NOTE and vice versa.
— Specifies whether the teleprotection system operates between two peers or three peers.
NUMBER OF TERMINALS
— Specifies how many channels are used. If the
NUMBER OF CHANNELS
set the to "2." For a two-terminal system, the
NUMBER OF CHANNELS
channels).
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
actual value.
TELEPROTECTION

FUNCTION: Disabled
NUMBER OF TERMINALS:

2
NUMBER OF COMM

CHANNELS: 1
LOCAL RELAY ID

NUMBER: 0
TERMINAL 1 RELAY ID

NUMBER: 0
TERMINAL 2 RELAY ID

NUMBER: 0
UNRET MSGS ALARM CH1 COUNT
UNRET MSGS ALARM CH1 MESSAGE
ACTUAL VALUES  STATUS  DIRECT INPUTS
Range: Disabled, Enabled
Range: 2, 3
Range: 1, 2
Range: 0 to 255 in steps of 1
Range: 0 to 255 in steps of 1
Range: 0 to 255 in steps of 1
is "3" (three-terminal system),
NUMBER OF TERMINALS
can set to "1" or "2" (redundant
NUMBER OF CHANNELS
PRODUCT SETUP
UNRET MSGS
, the
DIR IO CH1
5
5-111