User Manual

74 Rockwell Automation Publication 193-UM002I-EN-P - December 2011
Chapter 3 Protective Trip & Warning Functions
• bit 1 of Device Status, Parameter 21, will set to “1”.
OF Warn Level, Parameter 240, allows the installer to define the frequency in
which the E3 Plus Overload Relay will indicate a warning and is adjustable from
0…250 Hz.
Voltage Input Module
Detection
The E3 Plus model EC5 uses a Voltage Input Module to collect the voltage
signals of a power system. In the event that communications halt between the
voltage input module and the relay module, the E3 Plus model EC5 can issue a
trip or a warning to signify this unlikely event.
Voltage Hardware Trip
The E3 Overload Relay will trip with a Voltage Input Module Not Detected
indication if:
• no trip currently exists,
• Voltage Hardware Fault protection is enabled, and
• improper communications with the Voltage Input Module.
When the voltage hardware fault trip conditions are satisfied, the:
• TRIP/WARN LED will flash a red 1 long and 1 short blink pattern,
• bit 1 in V Trip Status, Parameter 160, will set to “1”,
• bit 0 of Device Status, Parameter 21, will set to “1”,
• Trip Relay contact will be open, and
• outputs will be placed in their Protection Fault state (if so programmed).
Voltage Hardware Warning
The E3 Overload Relay will issue a warning with a Voltage Input Module Not
Detected indication if:
• no warning currently exists,
• Voltage Hardware Fault warning is enabled, and
• improper communications with the Voltage Input Module.
When the voltage hardware fault warning conditions are satisfied, the:
TRIP/WARN LED will flash an amber 1 long and 1 short blink pattern,
bit 1 in V Warn Status, Parameter 161, will set to “1”, and
bit 1 of Device Status, Parameter 21, will set to “1”.