Schneider Electric 5.0A, 3.0A Indicator Lights, Ground-Fault Protection, Overload Indicator Light

Page 15

48049-136-05

Micrologic™ 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units

Rev. 01, 07/2012

Section 1—General Information

 

 

Ground-Fault Protection

Figure 10: Ground-Fault Protection Switches

Micrologic 6.0A Trip Unit

Equipment ground-fault protection protects conductors against overheating and faults from ground-fault currents (￿￿1200 A).

Equipment ground-fault protection is

standard on 6.0A trip units.

Ground-fault pickup (Ig) (A) sets ground

current level where circuit breaker will trip

after the preset time delay.

Ground-fault delay (tg) (B) sets the length of

time that the circuit breaker will carry a

ground-fault current above the ground-fault

pickup current level before tripping.

A

B

06133351

 

 

long time

 

 

 

 

 

 

 

Ir

.8

 

 

tr

 

8

 

 

 

.7

.9

 

(s) 4

12

 

 

.6

 

 

.95

2

 

 

16

 

 

.5

 

 

.98

1

 

 

20

 

 

.4 x In 1

.5 @ 6 Ir24

 

 

 

 

 

short time

 

 

 

 

 

 

Isd

4

 

 

tsd

.4

.4 .3

 

3

5

 

(s)

 

 

 

.3

 

 

.2

 

2.5

 

 

6

 

 

 

 

2

 

 

8

 

.2

 

 

.1

 

 

1.5 x Ir

10

 

.1

 

0

 

 

 

on I2t off

 

 

 

setting

 

delay

 

 

 

Ig

E

 

 

tg

.4

.4 .3

 

 

D

F

(s)

 

 

.3

 

 

.2

 

 

C

 

G

 

 

 

 

 

 

 

H

.2

 

 

.1

 

 

A

 

J

.1

I2t

0

 

 

 

on

off

 

fault

alarm

instantaneous

I i

8

5 10

4 12

315

2off

x In

test

ENGLISH

Equipment ground-fault protection can be

zone-selective interlocked (ZSI) with

upstream or downstream circuit breakers.

Setting the ground-fault delay (tg) to the 0

setting turns off zone-selective interlocking.

Neutral protection and equipment ground-

fault protection are independent and can

operate concurrently.

Table 4:

Micrologic Trip Unit Ground-Fault Pickup Values

 

Ig (= In x....)

 

A

B

C

D

E

F

G

H

J

 

 

 

 

 

 

 

 

 

 

 

In ￿ 400 A

 

0.3

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

 

 

 

 

 

 

 

 

 

 

400 A < In ￿ 1200 A

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

 

 

 

 

 

 

 

 

 

 

 

In > 1200 A

 

500 A

640 A

720 A

800 A

880 A

960 A

1040 A

1120 A

1200 A

 

 

 

 

 

 

 

 

 

 

In = sensor rating.

 

 

 

 

 

 

 

 

 

Ig = ground-fault pickup.

Table 5:

Micrologic Trip Unit Ground-Fault Delay Values

Setting

 

Ground-Fault Delay

 

 

 

 

 

 

 

 

 

I2t off (ms at In) (seconds)

0

0.1

0.2

0.3

0.4

 

I2t on (ms at In) (seconds)

0.1

0.2

0.3

0.4

 

tsd (min. trip) (milliseconds)

20

80

140

230

350

 

 

 

 

 

 

 

 

tsd (max. trip) (milliseconds)

80

140

200

320

500

 

 

 

 

 

 

 

 

 

NOTE: Use I2t off with ZSI for proper coordination. Using I2t on with ZSI is not recommended as the delay in the upstream device receiving a restraint signal could result in the trip unit tripping in a time shorter than the published trip curve.

Indicator Lights

Overload Indicator Light

Figure 11: Overload Indicator Light

The overload indicator light (A) lights when the Ir long-time pickup level has been exceeded (over 100% on the bar graph).

06133352

 

 

 

long time

 

 

 

 

 

 

 

Ir

.8

 

 

tr

8 12

 

 

.7

.9

 

(s) 4

 

 

.6

 

 

.95

2

 

16

 

 

.5

 

 

.98

1

 

20

 

 

 

.4 x In 1

.5 @ 6 Ir24

 

 

 

 

 

 

 

short time

 

 

 

 

 

 

Isd

 

 

 

tsd

 

.4 .3

 

 

3

4

5

 

.4

 

 

2.5

 

 

6

 

.3

 

.2

 

 

2

 

 

8

 

.2

 

.1

 

 

 

1.5 x Ir

10

 

.1

0

 

 

 

 

on

I2t

 

 

 

 

 

 

 

 

setting

 

delay

 

 

 

IΔn

 

 

ΔI

 

 

 

 

(A) 3

5

7 (ms)230

350

 

2

 

 

10

140

 

 

 

1

 

 

20

 

 

 

 

 

 

 

 

 

.5

 

30

 

60

800

 

alarm

instantaneous

I i

4

 

3

5

 

2.5

 

6

2

 

8

1.510

x In

test

A

100%

40 %

earth leakage

© 1999–2012 Schneider Electric All Rights Reserved

13-EN

Image 15
Contents Conserver pour usage ultérieur Page Retain for future use Micrologic 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip UnitsDeath or serious injury Hazard Categories and Special SymbolsPlease Note FCC NoticeTable of Contents List of Registers Rating Plug Removal New Rating Plug InstallationCommunications Trip Unit SettingsGeneral Information IntroductionMicrologic 2.0A Trip Unit Micrologic 3.0A Trip Unit0A Trip Unit Micrologic 5.0A Trip Unit Micrologic 6.0A Trip Unit Zone-Selective Interlocking Trips and clears the fault. Circuit breaker 2 does not tripTrip Unit Switches Micrologic Trip Unit Long-Time Delay ValuesLong-Time Protection Short-Time Protection Micrologic Trip Unit Short-Time Delay ValuesInstantaneous Protection Micrologic Trip Unit Ground-Fault Pickup Values Indicator LightsGround-Fault Protection Overload Indicator LightControl Power Trip Unit TestingMicrologic Trip Unit Configuration Trip Indicator LightsExternal Power Supply Function Specification15-EN Ammeter Measurements Accessing InformationAmmeter Display17-EN Current MenuCurrent Menus Rev , 07/2012 Ammeter18-EN Peak MenuSwitch Settings Menu Switch settings menu displays19-EN Set pickup levels Switch Setting AdjustmentOperation Examples21-EN Set time delaySet Time Delay Rev , 07/2012 OperationSet Time Delays Set time delays22-EN 23-EN Zone-Selective Interlocking ZSIZSI Combinations Units24-EN Wire circuit breakers for zone-selectiveCommunication Module values Interlocking25-EN Set communication module valuesScreen Trip Unit Settings CheckTrip Unit Settings Trip Unit Operation Verification27-EN Equipment Ground-Fault Trip Functions TestingTrip Unit Resetting Trip Unit Status CheckTrip Unit Replacement Required ToolsPreparation Trip Unit Removal Trip Unit ReplacementBattery Installation Rating Plug Removal30-EN Trip Unit Installation31-EN Circuit Breaker Accessory CoverReplacement Close switch cover aTrip Unit Installation Check Trip Unit Setup Circuit Breaker Reconnection32-EN Adjustable Rating Plug Replacement New Rating Plug InstallationRating Plug Removal Circuit Breaker Disconnection Battery ReplacementCircuit Breaker Accessory Cover Removal Battery ReplacementWithstand Module Replacement Rev , 07/2012 Battery Replacement35-EN Module Module Name Equation Address Range Appendix A-Register ListList of Registers Register List37-EN Rev , 07/2012 Appendix A-Register ListSchneider Electric