GE P743 User Manual

Settings
P74x/EN ST/N
a7
MiCOM P74
1, P742, P743
(ST) 4-
23
ST
Menu Text Default Setting
Setting Range
Step Size
Min. Max.
CT Supervision
Sub-heading
CTS Timer alarm 5.0 s 0.1 s 10.0 s 0.1 s
Setting that determines the alarm time-delay of the element upon detection of a current
transformer supervision condition (current >10%
IN present in the CT and difference
between the magnitude of the current measured by two phases > 50%).
IMPORTANT NOTE: Tthe Error Factor K
CE
setting must not be changed.
1.3 Control and support settings
The control and support settings are part of the main menu and are used to configure the
relays global configuration. It includes submenu settings as below and is discussed in more
detail below:
− Circuit breaker control,
− CT & VT ratio settings,
− Record control settings,
− Measurement settings,
− Communications settings,
− Commissioning settings,
− Opto inputs and control inputs settings,
− When present, InterMiCOM communication and configuration settings,
− User interface (function keys, control input labels) settings.
1.3.1 Circuit breaker control (“CB Control” column – P742/P743)
The relay includes the following options for control of a single circuit breaker:
• Local tripping and closing, via the relay menu (or hotkeys),
• Local tripping and closing, via opto-isolated inputs or hotkeys (or function keys),
• Remote tripping and closing, using the relay communications.
Menu Text Default Setting
Setting Range
Step Size
Min. Max.
CB CONTROL
Prot Trip Pulse 0.20s 0.05s 2.00s 0.01s
Defines the duration of the trip pulse.
Trip Latched Disabled Enabled, Disabled
Reset Trip Latch No Yes, No
Latch of the trip pulse.
CB control by Disabled
Disabled, Local, Remote, Local + Remote,
Opto, Opto + local, Opto + Remote, Opto +
Remote + local
This Setting selects the type of circuit breaker control that be used in the logic

GE P743 Specifications

General

Brand	GE
Model	P743
Category	Relays
Language	English