ABB Sweden PBSE5117 communication module card spare parts

Description

PBSE5117 LATCHED a: W1 Neg Seq Time OC or OPERATED a: W1 Neg Seq

Time OC

 Reduce the current until the element resets.

The reset level should be 97% of the operate level. When the element

resets the Trip and Message LEDs should remain on if the W1 NEG SEQ

TIME OC TARGET was PBSE5117 selected as Latched. Otherwise only the Trip

LED remains on.

 Reset indicators and clear messages.

7.5.15.4 Operating Time

 Using a table like the one shown below, select 3 or 4 values of current

multiples at which the timing is to be measured.

 Enter the expected operating times from the timing curve applied in the

settings.

 Using the setup in FIGURE 7–9: PBSE5117 General test setup on page 7–25 with

the interval timer enabled, set the current level to the desired value

(taking into account the relationship mentioned above) and apply

suddenly by closing the double-pole switch.

 Record the operate time and compare to the expected value.

 Repeat for all desired values of current.

7.5.15.5 Reset time

A simple verification of which reset mode, selected with the S4 ELEMENTS  NEG SEQ OC

 W1 NEG SEQ TIME OC  W1 NEG SEQ TIME OC RESET setpoint, can be obtained using

the simple test setup in FIGURE 7–9: General test setup on page 7–25. The procedure

consists of repetitive operating time measurements in quick succession. If the reset is

selected for “Instantaneous”, the operating time is always equal to the nominal time

derived from the selected curve. If the reset is PBSE5117 selected as Linear, the operating time varies

as a function of the time between successive applications of the current signal. If this test

is performed at current multiples of 2 to 3 times the pickup level, the variations in operating

time are easier to detect.

7.5.15.6 Winding 2 and 3 Elements

Because the negative-sequence time overcurrent elements on windings 2 and/or 3 can be

set with completely different parameters than those for the first element, it is necessary to

repeat the full set of tests described in this section for each winding.

To test these elements, disable all protection elements except for winding 2 negative

sequence time overcurrent. Connect the current signal to X = H4 and Y = G4. Repeat all the

tests described for the winding 1 element in this section. For winding 3, connect the

current signal to X = H7 and Y = G7.

Note

The blocking from logic input, if enabled, can be tested as described in earlier tests for

other elements.

7.5.16 Negative-sequence Instantaneous Overcurrent

7.5.16.1 Description

This procedure verifies that the negative-sequence instantaneous overcurrent

performance matches the in-service settings. These elements are found under the S4

ELEMENTS  NEG SEQ OC  W1 NEG SEQ INST OC settings menu. If the relay settings

require testing at current multiples of several times the rated CT secondary value, do not

leave the current signal on for more than a few seconds.

7.5.16.2 Winding 1 element

To ensure that only the Negative Sequence Instantaneous Overcurrent element operates

the trip relays (and any other output relays selected by the logic),

 Disable all protection features except PBSE5117 Negative Sequence Instantaneous

Overcurrent.

 Use the general test setup in FIGURE 7–9: General test setup on page

7–25.

 Connect the current supply to terminals X = H1 and Y = G1 to test the

Winding 1 element.

 Monitor the appropriate output relays as per the relay FlexLogic™

settings.

7.5.16.3 Pickup Level

 With the interval timer disabled, apply the current signal and increase its

magnitude until the trip relay and all selected auxiliary relays operate.

 Compare the measured operating level against the S4 ELEMENTS 

NEG SEQ OC  W1 NEG SEQ INST OC  W1 NEG SEQ INST OC

PICKUP relay settings

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