KUC711AE101 3BHB004661R0101 ABB excitation control system rack power supply

Description

LATCHED a: W1 Neg Seq Inst OC or OPERATED a: W1 Neg Seq

Inst OC

 Reduce the current KUC711AE101 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

INST OC TARGET was selected as Latched. Otherwise, only the Trip

LED should remain on.

 Reset indicators and clear messages.

7.5.16.4 Operating Time

 Using the setup in General test setup on page 7–25 with the Interval

Timer enabled, set the current level to 1.5 times the operate level of the

element and apply suddenly by closing KUC711AE101 the double-pole switch.

 Record the operate time and compare to the S4 ELEMENTS  NEG SEQ

OC  W1 NEG SEQ INST OC  W1 NEG SEQ INST OC DELAY setting.

7.5.16.5 Winding 2 and 3 Elements

Because the winding 2 and 3 elements can be set with completely different parameters

than the element for winding 1,

 Repeat the full set of tests described for the winding 1 element in this

section.

 Connect the current supply to terminals X = H4 and Y = G4 to test the

Winding 2 element. Use X = H7 and Y = G7 for the Winding 3 element.

Note

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

other elements.

7.5.17 Frequency

7.5.17.1 Setup

The power system frequency is measured from the voltage input if it has been enabled. If

there is no voltage input, it is measured from KUC711AE101 the winding 1 phase A current signal. These

tests require a variable-frequency current source for relays without a voltage input and a

variable-frequency voltage and current source for relays with a voltage input. Connections

are shown in the figure below. Only perform tests specific to the relay model.

Note

The underfrequency, overfrequency, and frequency decay elements are all supervised by

optional adjustable minimum current and minimum voltage level detectors. When testing

the performance of these elements on a 745 with the voltage input enabled, it may be

necessary to inject a current signal into winding 1 phase A if the current supervision is

enabled, or else the detectors will not operate.

As a preliminary step, disable all protection functions except underfrequency 1. Verify that

settings match the in-service requirements. Settings are entered or modified in the S4

ELEMENTS  FREQUENCY  UNDERFREQUENCY 1 settings menu.

Voltage input function (voltage input enabled):

 Using the variable-frequency voltage/current source connected to

terminals C11 and C12 for the voltage signal and H1 and G1 for the

current signal, set the frequency to 60.00 Hz (or 50.00 Hz for 50 Hz

systems) and the voltage amplitude to the rated VT secondary voltage.

 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 with no KUC711AE101 trip indications.

 Slowly decrease the frequency until the output relay(s) operate.

 Check that the operation took place at the selected frequency setting.

 As the frequency is varies, verify that the correct system frequency is

displayed by the A2 METERING  FREQUENCY  SYSTEM

FREQUENCY actual value.

 Slowly reduce the voltage and note the voltage at which the output

relay(s) reset.

 Check that this dropout voltage is approximately the voltage supervision

value in the S4 ELEMENTS  FREQUENCY  UNDERFREQUENCY 1

 MINIMUM OPERATING VOLTAGE setpoint.

Note

If voltage supervision is set to 0.0, then the element remains operated until the voltage is

decreased below approximately 2%, the level at which measurements become unreliable.

 Slowly increase the voltage and check that the element operates when

the voltage reaches 2% above the supervision level.

 Return the voltage to nominal value.

 Slowly decrease the current until the element resets.

Why are the prices of many products of our company more competitive?
(1) Source purchase to reduce the price difference in the intermediate phase
(2) Stable channel and more guaranteed supply
Lead time problem
(1) For the spot products in stock, the delivery can be arranged on the same day after the contract payment is signed
(2) Order products and deliver according to the quoted delivery date
Xiamen Xiongba adheres to the enterprise philosophy of “improving the value of spare parts supply chain”,
For the simple purchase procedure of spare parts, ensure that they are delivered to the site in a timely manner, and help users reduce the risk of downtime caused by the shortage of spare parts
The emergency spare parts support service is complete, and the user can customize the spare parts. The quality of the spare parts is reliable. All the spare parts provided enjoy a one-year super long warranty
Spot stock, fast response, reduce user capital investment, improve spare parts utilization, spare parts replacement!

Details: If you need urgent delivery orders, please feel free to contact us, and we will try our best to meet your needs.
Price problem: If you find that other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference prices and give you further discounts.
Contact us:+86 180 6092 3929
Mail: 2235954483@qq.com
Contact: Chen