Universal Remote Control MX-880Z - SPECS SHEET Informazioni Techniche Scaricare il pdf (Pagina 27)

™

Masterpact™ NT and NW Universal Power Circuit Breakers

Micrologic™ Electronic Trip Systems

05/2014

Micrologic 5.0P & 6.0P Trip Units with Power Metering

Protection Settings

Configuring Alarms and Other Protection Functions

When the cover is closed, the keypad may no longer be used to change the protection settings, but it

still provides access to the displays for measurements, histories, indicators, etc. Depending on the

thresholds and time delays set, the Micrologic P trip unit monitors current, voltage, power, frequency,

and phase sequence. Each threshold overrun may be signalled remotely via the communication

network.

Each threshold overrun may be combined with tripping (protection) or an indication carried out by an

optional M2C/M6C programmable contact (alarm), or both (protection and alarm).

Maintenance Record

The maintenance record can be consulted using the full-function test kit or remotely via the

communication network. It can be used as an aid in troubleshooting and to assist scheduling for device

maintenance operations.

Recorded indications include:

•

Highest current measured

•

Operation counter (both cumulative total and total since last reset)

•

Number of test kit connections

•

Number of trips in operating mode

•

Contact wear (Masterpact NW only)

1—Test lamp and indication

reset

2—Indication of tripping

cause

3—High resolution screen

4—Measurement display

5—Maintenance indicators

6—Protection settings

7—Navigation buttons

8—Overload signal (LED)

9—Long-time rating plug

screw

10—Long-time current

setting and tripping delay

11—Short-time pickup and

tripping delay

12—Instantaneous pickup

13—Hole for settings

lockout pin

14—Electronic push-to-trip

15—Ground-fault pickup and

tripping delay

16—Test connector

The adjustable protection functions of the 5.0P and 6.0P trip units

are identical to those of Micrologic A trip unit (overloads, short

circuits, equipment ground-fault protection); see page 25.

These units also feature:

•

Fine adjustment: Within the range below the rotary switch

setting, fine adjustments of pickups/delays in steps of 1 A/s

(except for short-time and ground-fault) are possible on the

keypad or remotely by the communication network.

•

Inverse definite minimum time lag (IDMTL) setting:

Coordination with fuse-type or medium-voltage protection systems

is optimized by adjusting the long-time delay curve around 6 x I

axis. This setting ensures better coordination with certain loads.

•

Neutral protection: On three-pole circuit breakers, neutral

protection may be set using the keypad or remotely using the

communication network to one of four positions:

—OFF

— 1/2N (1/2 x I

)

—1N (1 x I

)

—2N (2 x I

)

NOTE: The neutral protection is disabled if the long-time curve is set

to one of the IDMTL protection settings.

Micrologic 6.0P Trip Unit

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Universal Remote Control MX-880Z - SPECS SHEET Informazioni Techniche Pagina 27

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