GE D60 Instruction Manual page 284

5.6 CONTROL ELEMENTS
c) PERMISSIVE UNDER-REACHING TRANSFER TRIP (PUTT)
PATH: SETTINGS CONTROL ELEMENTS
PUTT SCHEME
5
This scheme uses an under-reaching Zone 1 distance element to key a transfer trip signal(s) to the remote terminal(s)
where it is supervised by an over-reaching Zone 2 distance element. For proper operation, the Zone 1 and 2 phase and
ground distance elements must be enabled, configured, and set per rules of distance relaying.
In single-pole tripping applications, the scheme uses local fault type identification provided by the Phase Selector together
with information received from the remote terminal(s). The scheme generates output operands (
) that are used to transmit the signal to the remote end(s). Choices of communications channel include remote inputs/
TX4
outputs and telecommunications interfaces. When used with telecommunications facilities the output operands should be
assigned to operate output contacts connected to assert the individual bits at the interface.
To make the scheme a fully operational stand-alone feature, the scheme output operands must be configured to interface
with other relay functions, output contacts in particular. Typically, the output operands should be programmed to initiate a
trip, breaker fail, and autoreclose, and drive a user-programmable LED as per user application. When used in conjunction
with the Trip Output element, the scheme is pre-configured to initiate trip, breaker fail and single-pole autoreclose actions.
• PUTT RX PICKUP DELAY: This setting enables the relay to cope with spurious receive signals. This delay should be
set longer than the longest spurious TX signal that can be received simultaneously with the zone 1 pickup. The
selected delay will increase the response time of the scheme.
• PUTT SEAL-IN DELAY: The output FlexLogic™ operand (
A seal-in time delay is applied to this operand for coping with noisy communication channels such as a power line car-
rier. The
PUTT SEAL-IN DELAY
trip table of the PUTT scheme, the trip operands
• PUTT NO OF COMM BITS: This setting specifies the number of bits of the communications channel available for the
scheme. The transmit codes and trip table of the PUTT scheme are identical as those for the direct under-reaching
transfer trip scheme. Please refer to Chapter 8: Theory of Operation for more information.
• PUTT RX1 through PUTT RX4: These settings allow the user to select the FlexLogic™ operands that represent the
receive signals for the scheme. Typically input contacts interfacing with a signaling system are used. In single-bit appli-
cations, PUTT RX1 must be used. In two-bit applications,
tions, ,
PUTT RX1 PUTT RX2
5-194
PILOT SCHEMES
PUTT SCHEME
FUNCTION: Disabled
PUTT RX PICKUP
MESSAGE
DELAY: 0.000 s
PUTT SEAL-IN
MESSAGE
DELAY: 0.010 s
PUTT NO OF COMM
MESSAGE
BITS: 1
PUTT RX1:
MESSAGE
Off
PUTT RX2:
MESSAGE
Off
PUTT RX3:
MESSAGE
Off
PUTT RX4:
MESSAGE
Off
PUTT SCHEME TARGET:
MESSAGE
Self-Reset
PUTT SCHEME EVENTS:
MESSAGE
Disabled
is a minimum guaranteed duration of the
, , and
PUTT RX3 PUTT RX4
D60 Line Distance Relay
PUTT SCHEME
Range: Disabled, Enabled
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: 1, 2, or 4
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: Self-Reset, Latched, Disabled
Range: Disabled, Enabled
) is produced according to the PUTT scheme logic.
PUTT OP
PUTT OP
, , and are sealed-in for the same period of time.
PUTT TRIP A B C 3P
and
PUTT RX1 PUTT RX2
must be used. In multi-terminal applications, the
5 SETTINGS
through
PUTT TX1
pulse. As this operand activates the
must be used. In four-bit applica-
signals from
RX
GE Multilin
PUTT