GE L60 Instruction Manual page 299

5 SETTINGS
The L60 latching output contacts are mechanically bi-stable and controlled by two separate (open and close) coils. As such
they retain their position even if the relay is not powered up. The relay recognizes all latching output contact cards and pop-
ulates the setting menu accordingly. On power up, the relay reads positions of the latching contacts from the hardware
before executing any other functions of the relay (such as protection and control features or FlexLogic™).
The latching output modules, either as a part of the relay or as individual modules, are shipped from the factory with all
latching contacts opened. It is highly recommended to double-check the programming and positions of the latching con-
tacts when replacing a module.
Since the relay asserts the output contact and reads back its position, it is possible to incorporate self-monitoring capabili-
ties for the latching outputs. If any latching outputs exhibits a discrepancy, the
declared. The error is signaled by the
• OUTPUT H1a OPERATE: This setting specifies a FlexLogic™ operand to operate the 'close coil' of the contact. The
relay will seal-in this input to safely close the contact. Once the contact is closed and the
any activity of the
OPERATE
inputs active (logic 1), the response of the latching contact is specified by the
RESET
• OUTPUT H1a RESET: This setting specifies a FlexLogic™ operand to operate the 'trip coil' of the contact. The relay
will seal-in this input to safely open the contact. Once the contact is opened and the
activity of the input, such as subsequent chattering, will not have any effect. With both the
RESET
inputs active (logic 1), the response of the latching contact is specified by the
• OUTPUT H1a TYPE: This setting specifies the contact response under conflicting control inputs; that is, when both the
and signals are applied. With both control inputs applied simultaneously, the contact will close if set to
OPERATE RESET
"Operate-dominant" and will open if set to "Reset-dominant".
Application Example 1:
A latching output contact H1a is to be controlled from two user-programmable pushbuttons (buttons number 1 and 2). The
following settings should be applied.
Program the Latching Outputs by making the following changes in the
PUTS CONTACT OUTPUT H1a
"
OUTPUT H1a OPERATE: PUSHBUTTON 1 ON
"
OUTPUT H1a RESET: PUSHBUTTON 2 ON
Program the pushbuttons by making the following changes in the
TONS USER PUSHBUTTON 1
PUSHBUTTON 1 FUNCTION:
PUSHBTN 1 DROP-OUT TIME:
Application Example 2:
A relay, having two latching contacts H1a and H1c, is to be programmed. The H1a contact is to be a Type-a contact, while
the H1c contact is to be a Type-b contact (Type-a means closed after exercising the operate input; Type-b means closed
after exercising the reset input). The relay is to be controlled from virtual outputs: VO1 to operate and VO2 to reset.
Program the Latching Outputs by making the following changes in the
PUTS CONTACT OUTPUT H1a
"VO1"
OUTPUT H1a OPERATE:
"VO2"
OUTPUT H1a RESET:
Since the two physical contacts in this example are mechanically separated and have individual control inputs, they will not
operate at exactly the same time. A discrepancy in the range of a fraction of a maximum operating time may occur. There-
fore, a pair of contacts programmed to be a multi-contact relay will not guarantee any specific sequence of operation (such
as make before break). If required, the sequence of operation must be programmed explicitly by delaying some of the con-
trol inputs as shown in the next application example.
Application Example 3:
A make before break functionality must be added to the preceding example. An overlap of 20 ms is required to implement
this functionality as described below:
GE Multilin
LATCHING OUT ERROR
input, such as subsequent chattering, will not have any effect. With both the
menu (assuming an H4L module):
"
"
and menus:
USER PUSHBUTTON 2
"Self-reset"
PUSHBUTTON 2 FUNCTION:
"0.00 s"
PUSHBTN 2 DROP-OUT TIME:
and menus (assuming an H4L module):
CONTACT OUTPUT H1c
OUTPUT H1c OPERATE:
OUTPUT H1c RESET:
L60 Line Phase Comparison Relay
LATCHING OUTPUT ERROR
FlexLogic™ operand, event, and target message.
OUTPUT H1A TYPE
OPERATE
OUTPUT H1A TYPE
SETTINGS INPUTS/OUTPUTS
PRODUCT SETUP USER-PROGRAMMABLE PUSHBUT-
"Self-reset"
"0.00 s"
SETTINGS INPUTS/OUTPUTS
"VO2"
"VO1"
5.7 INPUTS/OUTPUTS
self-test error is
input is logic 0 (off),
RESET
and
OPERATE
setting.
input is logic 0 (off), any
and
OPERATE RESET
setting.
CONTACT OUT-
CONTACT OUT-
5-207
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