Universal Remote Control MX-880Z - SPECS SHEET Informazioni Techniche Scaricare il pdf (Pagina 24)

™

Masterpact™ NT and NW Universal Power Circuit Breakers

Micrologic™ Electronic Trip Systems

05/2014

Micrologic 2.0, 3.0, and 5.0 Basic Trip Units

The Micrologic 2.0, 3.0, and 5.0 trip units protect power circuits.

Protection Settings

1—Overload signal (LED)

2—Long-time rating plug

screw

3—Long-time current setting

and tripping delay

4—Instantaneous pickup

5—Short-time pickup and

tripping delay

6—Test connector

Protection thresholds and delays are set using the rotary switches.

A full-range of long-time settings are available via field-

installable adjustable rating plugs.

•

Overload protection

— True RMS long-time protection

— Thermal imaging: Active thermal imaging before and

after tripping

•

Short-circuit protection.

— Short-time RMS

— Selection of I

t type (ON or OFF) for short-time delay

•

Instantaneous protection.

•

Neutral protection on four-pole circuit breakers.

Micrologic 5.0 Basic Trip Unit

Table 21: Micrologic 2.0 and 3.0 Basic Trip Unit Settings

Long-Time

Protection

Current Setting (A)

Tripping Between 1.05

and 1.20 x I

= l

x...

2.0: 0.40 0.50 0.60 0.70 0.80 0.90 0.95 0.98 1.00

3.0: 0.40 0.45 0.50 0.60 0.63 0.70 0.80 0.90 1.00

Other ranges are available by changing rating plug

Time Delay (s)

Accuracy: 0 to –20%

at 1.5 x I

12.5 25 50 100 200 300 400 500 600

at 6 x I

0.5 1 2 4 8 12 16 20 24

at 7.2 x I

0.34 0.69 1.38 2.7 5.5 8.3 11 13.8 16.6

Thermal Imaging 20 minutes before or after tripping

Short-Time

Protection

Current Setting (A)

Accuracy: ±10%

No Delay

= I

x... 2.0: 1.5 2 2.5 3 4 5 6 8 10

Instantaneous

Protection

Current Setting (A)

Accuracy: ±10%

= I

x... 3.0:1.52345681012

Table 22: Micrologic 5.0 Basic Trip Unit Settings

Long-Time

Protection

Current Setting (A)

Tripping Between 1.05

and 1.20 x I

= l

x...

IEC: 0.40 0.50 0.60 0.70 0.80 0.90 0.95 0.98 1.00

UL/ANSI: 0.40 0.45 0.50 0.60 0.63 0.70 0.80 0.90 1.00

Other ranges are available by changing rating plug

Time Delay (s)

Accuracy: 0 to –20%

at 1.5 x I

12.5 25 50 100 200 300 400 500 600

at 6 x I

0.51 2 4 8 12162024

at 7.2 x I

0.34 0.69 1.38 2.7 5.5 8.3 11 13.8 16.6

Thermal Imaging 20 minutes before or after tripping

Short-Time

Protection

Current Setting (A)

Accuracy: ±10%

= I

x... 1.522.53456810

Time Delay (s)

at 10 x I

Settings

t OFF 0 0.1 0.2 0.3 0.4

t ON 0.1 0.2 0.3 0.4

Min. trip

time (ms)

20 80 140 230 350

Max. trip

time (ms)

80 140 200 320 500

Instantaneous

Protection

Current Setting (A)

Accuracy: ±10%

= I

x... 23468101215off

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 179 180

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Universal Remote Control MX-880Z - SPECS SHEET Informazioni Techniche Pagina 24

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