GE 169 Instruction Manual page 93

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GE Power Management
GLOSSARY
Active - Refers to the state of an output relay. An output relay will become active (activate) when any of the
functions assigned to that relay indicate a trip/alarm condition.
Inactive - Refers to the state of an output relay. An output relay will be inactive whenever none of the conditions
assigned to that relay indicate trip/alarm conditions.
Latched - Refers to the configuration of an output relay. Latched relays must be manually reset after activation.
This can be done by using the Reset key or the External Reset terminals. Trip and Aux. 2 relays are always latched.
Unlatched - Refers to the configuration of an output relay. An unlatched relay will be automatically reset after the
conditions causing its activation are removed.
Fail-safe - Refers to the configuration of an output relay. When a fail-safe relay is in the no trip/no alarm (inactive)
state its coil will be energized (i.e. have a voltage across it). Thus when control power is removed from the 169 all
fail-safe output relays will go to the active state. Aux. 2 relay is always fail-safe.
Non-fail-safe - Refers to the configuration of an output relay. When a non-fail-safe relay is in the no trip/no alarm
state its coil will be de-energized (i.e. have no voltage across it). Thus when control power is removed from the 169
relay all non-fail-safe output relays will go to the inactive state.
Tripped - Refers to the state of the motor controller, starter, or system circuit breaker. When one of these devices is
tripped the power to the motor will be removed. Normally the Trip relay of the 169 is used to control this operation.
Mode - The large amount of information that can be viewed on the 169 relay display is divided into four modes:
ACTUAL VALUES, SETPOINTS, HELP, and TRIP/ALARM. The relay can be put into any one of these modes for
viewing specific information. The ACTUAL VALUES and SETPOINTS modes each contain many pages of data while
all four modes contain many lines.
Page - The ACTUAL VALUES and SETPOINTS modes are divided into a number of pages containing different sets
of information. Each page contains many lines, only one of which can be viewed on the display at any one time.
Line - Each relay display mode is divided into a number of lines of data. Each line consists of 2 rows X 24
characters. One line will always be visible on the 169 relay display.
Flash Message - Flash messages are one-line messages that appear on the display in response to certain key
closures or timer indications. Flash messages stay on the display for 2 seconds.
Thermal Memory - This is an internal 169 relay register which is used to thermally model the motor being protected.
When this register reaches a value of 100% the entire thermal capacity of the motor has been used and an
OVERLOAD TRIP is initiated.