Siemens SG8158-00 사용자 설명서

Protective Function Configuration

Siemens Energy & Automation, Inc.

5.3 High-Set Instantaneous Phase

Overcurrent (50HS)

The High-Set Instantaneous Phase Overcurrent function

causes an undelayed trip when any individual measured

phase current exceeds the preprogrammed threshold

(pickup value). The relay will trip at 100% of the set pickup

point.

The function can be enabled or disabled (1551). The range of

the pickup value (1552) depends on the secondary phase CT

rating (1 A or 5 A) and the value is in secondary amperes.

Each of the two waveform capture buffers (1560 and 1561)

can be independently programmed to freeze snapshots on

trip.

The function is able to actuate any binary output contact on

pickup, and any trip or binary output contact on trip.

5.4 Instantaneous Neutral or Ground

Overcurrent (50N)

The Instantaneous Neutral or Ground Overcurrent function

has an adjustable delay whose input is the current measured

by the neutral CT. It begins timing when the neutral or ground

current exceeds the pickup value. The ISGS relay will pickup

at 100% of set pickup point and drop out at 95% of the

pickup point.

A1500 High-SetInstantaneous Phase Overcurrent (50HS)

Address Parameter

Option

1551 Function

Enabled or Disabled

1552 Pickup

5A CTs: 5-120 A or

1A CTs: 0.2-24 A

(0.1 A steps)

1560 Freeze Wfm1

on Trip, or None

1561 Freeze Wfm2

on Trip, or None

A1600 Instantaneous Neutral or Ground Overcurrent

(50N)

Address Parameter

Option

1601 Function

Enabled or Disabled

1602 Pickup

5 A CTs: 1-120 A or

1 A CTs: 0.2-24 A

(0.1 A steps)

1604 Time Delay

0-60 s (0.01 s steps)

1610 Freeze Wfm1

on Pickup, on Trip, or None

1611 Freeze Wfm2

on Pickup, on Trip, or None

1612 Blocked by

None, 50HS & 50HSN, 50HSN,

or 50HS

The Instantaneous Neutral or Ground Overcurrent function

can be enabled or disabled (1601). The form of protection

provided depends on the manner in which the external CTs

are connected to the ISGS relay. Figure 4.5 in Chapter 4

shows correct CT connections and polarities.

The range of the pickup value (1602) depends on the sec-

ondary neutral CT rating (1 A or 5 A) and the value is in sec-

ondary amperes.

The time delay (1604) represents the time between pickup

and trip and can be adjusted from 0 to 60 seconds in steps

of 0.1 second. If the function remains in pickup for longer

than the time delay, this parameter causes a trip. The delay

can also be set to infinity so that the function never times out.

Each of the two waveform capture buffers (1610 and 1611)

can be independently programmed to freeze snapshots on

pickup or trip.

The function is able to actuate any binary output contact on

pickup, and any trip or binary output contact on trip.

5.5 High-Set Instantaneous Neutral or

Ground Overcurrent (50HSN)

The High-Set Instantaneous Neutral or Ground Overcurrent

function causes an undelayed trip when any individual mea-

sured phase current exceeds the preprogrammed threshold

(pickup value). The relay will trip at 100% of the set pickup

point.

The High-Set Instantaneous Neutral or Ground Overcurrent

function can be enabled or disabled (1651).

The range of the pickup value (1652) depends on the sec-

ondary phase CT rating (1 A or 5 A) and the value is in sec-

ondary amperes.

Each of the two waveform capture buffers (1660 and 1661)

can be independently programmed to freeze snapshots on

trip.

The function is able to actuate any binary output contact on

pickup, and any trip or binary output contact on trip.

A1600 High-Set Instantaneous Neutral or Ground

Overcurrent (50HSN)

Address Parameter

Option

1651 Function

Enabled or Disabled

1652 Pickup

5 A CTs: 5-120 A or

1 A CTs: 0.2-24 A

(0.1 A steps)

1660 Freeze Wfm1

on Trip, or None

1661 Freeze Wfm2

on Trip, or None

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