GE IS200VPWRH1AGB IS200VPWRH1AGC MARK control display panel

Description

The following setpoints are programmed independently and are repeated for each of the Reclosure Shots 1-4.

These setpoints determine the dead time for a given shot and the overcurrent characteristics during that shot.

Selections for shots, that are greater than the maximum number of shots programmed in the scheme setup,

will not be used by the scheme.

IS200VPWRH1AGB Utility statistics indicate that a large percentage of feeder faults (about 80%) are of a transient nature. Typically,

once the feeder is tripped an autorecloser automatically recloses the feeder breaker after a short time delay. If

the fault was transient, the entire feeder is returned to normal service and customers experience a very short

IS200VPWRH1AGB disturbance. If the fault is permanent and on the load side of another protection point, the reclosure scheme

delays another trip of the breaker until this other device clears the fault so that service is disrupted only for

loads beyond this other protection point.

A common phase protection scheme uses instantaneous elements in conjunction with automatic reclosing.

The design goal is to select settings that will detect faults out to the most distant (in impedance terms) point of

the IS200VPWRH1AGB feeder and provide fast operation. Typically ‘loset’ overcurrent elements are programmed to be blocked

after the first reclosure. This gives downstream devices, such as fuses, time to interrupt a permanent fault,

especially on a feeder tap. Loset elements would then be re-enabled after the scheme is reset. ‘Hiset’ ele

IS200VPWRH1AGB ments may also be blocked on a subsequent shot with a faster time overcurrent curve selected to allow the

fault to burn off. In this case a permanent fault would then cause a time overcurrent trip.

A typical autoreclose scheme as implemented in the 760 would respond to faults as follows:

1. With the breaker closed and protection enabled, a transient fault produces a current above the pickup of

both Instantaneous OC 1(loset) and Time OC 1 elements.

2. The Time OC element begins to time, and the Instantaneous OC element operates, signaling the breaker

to trip and initiate a reclosure.

3. The breaker trips and signals the autoreclose scheme that it is now open. The Instantaneous OC 1 and

Time OC 1 elements automatically reset because the breaker is open.

4. If all requirements of the autoreclose scheme are fulfilled, autoreclose signals the breaker to close and

advances the shot counter. Shot 1 settings block the Instantaneous OC element from further operation.

5. The breaker closes resulting in an inrush current of the feeder loads.
6. If the fault was transient, the current reduces to the load level before a trip occurs. The autoreclose

IS200VPWRH1AGB scheme eventually resets and the cycle begins again at step 1.

7. If the fault is permanent, a current above the pickup of both the Instantaneous OC 1 and the Time OC 1

elements is produced. However, the Instantaneous OC 1 element is blocked from operating.

8. While the Time OC 1 element is timing, any protection devices between this relay and the fault location are

provided an opportunity to isolate the fault.

9. If no protection downstream from the relay clears the fault, the Time OC 1 element will time-out, signaling

the breaker to trip and initiate the autoreclose scheme again.

10. If the shot counter has not reached its maximum allowed value then the cycle begins at step 6 using pro

tection settings for the current shot.

11. If the shot counter has reached its maximum then the scheme goes to lockout.

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 de

livery 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
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