ABB PFEA112-20 3BSE050091R20 tension controller module is brand new

Description

PFEA112-20 Current input function (voltage input disabled):

 Using a frequency-ramping programmable voltage/current source

connected to terminals H1 and G1 for the current signal, set the

frequency to 60.00 Hz (or 50Hz). PFEA112-20 Set the current amplitude to rated CT

secondary.

 Monitor the appropriate trip and auxiliary relays.

 Reset all alarms and indications on the relay.

The relay display should remain unchanged with no trip indications.

 Program the function generator to simulate a frequency rate-of-change

just above rate 1.

The start frequency should be the nominal frequency of the relay. The

end frequency must be below the frequency PFEA112-20 decay threshold if the relay

is to operate.

Note that operation occurs if the rate criterion is satisfied and the

frequency is below the threshold.

 Initiate ramping action and verify that the element operates once the

frequency drops below the threshold.

 Check that the Trip and Pickup LEDs are on and one of the following

trip messages is displayed:

LATCHED: Freq Decay Rate 1 or OPERATED: Freq Decay Rate 1

If the target was selected as Latched, the PFEA112-20 Trip LED and the

message remain on.

 Set the current level to a value below the S4 ELEMENTS  FREQUENCY

 FREQUENCY DECAY  MINIMUM OPERATING CURRENT value.

 Repeat ramping action and verify that element does not operate.

If current sensing has been disabled for this element, operation will

continue down to a current level of approximately 2% of nominal.

 For timing tests, an approximate operate time is obtained if a timer is

triggered at the same time as the ramping action and the time interval

between the trigger point and the relay operation measured.

 From that measured time, subtract the time required for the frequency to

reach the threshold value.

The expected time must be computed using the rate of change and the

effect of the S4 ELEMENTS  FREQUENCY  FREQUENCY DECAY

 FREQUENCY DECAY DELAY time delay.

7.5.18 Overexcitation

7.5.18.1 Volts per Hertz

The following procedure applies to both PFEA112-20 volts-per-hertz elements; make the necessary

changes where appropriate. The volts-per-hertz operating levels are set in terms of the

relay-input voltage divided by the frequency of that voltage.

 Disable all elements except volts-per-hertz 1.

 Monitor the appropriate contact.

 Use the test setup in FIGURE 7–12: Frequency element testing on page

7–44 with variable-frequency voltage source.

The Volts-per-hertz settings are found in the S4 ELEMENTS  OVEREXCITATION  VOLTS

PER-HERTZ 1 setpoints menu.

 Apply a voltage starting at 60 Hz and increase the magnitude until the

element operates.

 Reduce the frequency in steps of 5 Hz and repeat the measurement.

The element should operate at a consistent PFEA112-20 value of volts/hertz equal to

the setting of the element.

 Check that the Trip and Pickup LEDs are on and one of the following

trip messages is displayed:

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