Moeller GmbH GB Leistungsschalter Protective note to rule DIN ISO 16016 is to be considered The new...

Moeller GmbHGB Leistungsschalter

The new line of circuit breaker IZM

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Electronic overcurrent releases



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First I want to present an overview of the electronic overcurrent releases (short form: trip units) with more

details.

Because this is the most important device of the IZM circuit breaker.



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Overview of the electronic overcurrent releases

Which features are the same for all types?

Additional features for type V, U, R and D

Special features for type U, R and D

Graphical display

How to do the settings?

Characteristics




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Trip units: Types of electronic overcurrent releases- overview -

XZMD

XZMR

L-I L-S-I (-N-G)L-S-I-N-GL-S-I L-S-I (-N-G) L-S-I (-N-G)

XZMV

XZMA XZMV XZMV+XT XZMU (+XT) XZMR (+XT) XZMD (+XT)

Earth fault protection ‚XT‘ is optional and for type ‚U‘, ‚R‘ and ‚D‘ even modular for retrofitting.

XZMV XZMUXZMA



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XZMA Release for power distribution system protection

XZMV Release for selective (discriminative) protection

XZMU Release for universal protection

XZMR Digital release, for external parameterization only

XZMD Digital release

Circuit breaker with trip units type ‘U’, ‘R’ and ‘D’ are already equipped with the internal system bus

Trip units: Types of electronic overcurrent releases



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IZM trip units:

L Inverse time-delay overLoad range A, V, V+XT, U, R, D

S Short-time delay short-circuit tripping V, V+XT, U, R, D

I Instantaneous short-circuit tripping A, V, V+XT, U, R, D

N Neutral conductor overload tripping V+XT, U, R, D

G Earth fault tripping (Ground fault) V+XT, U+XT(A), R+XT(A), D+XT(A)+XT = earth-fault release

additional equipment

Trip units: The different protective ranges



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XZMA

Trip units: Same features for all types

Mechanical reset:

• indicates a tripping because of overload, short circuit or earth fault

• press tripped indicator until it latches for reset of the mechanical reclosing lockout and XHIA

• optional: automatic reset XFR

• optional: safety lock for the tripped indicator prohibits accidental resetting of the mechanical reclosing lockout NEWNEW

NEWNEW



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XZMA

LED indicators

• ACTIVE-LED (flashing green light): overcurrent release is activated = enough supply from the internal current transformers or from an external source (possible for type U, R, D)

• ALARM-LED (continuously yellow light): overload alarm, is displayed if the load is higher than the current setting Ir

NEWNEW




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XZMA

Rating PlugIn = 3200 A ERROR

Error will be displayed with:

• Microprozessor error• Internal system bus error• Memory test error • Temperature sensor• Setting error• Rating Plug is missing or defective

NEWNEW




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XZMA

Sealing eyelet

for the optional sealing cover XHB(G)




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XZMA

Test socket

• for connection to the test device

• also used for connection to XEM-PG(E) with types U, R, D

(1) LED for operating voltage indication

(2) Control buttons

(3) 6 LEDs to show test result




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Trip units: Additional features for type V, U, R and D

XZMV

Rating PlugIn = 3200 A

T. U.

ERROR

Rating Plug:

• plug in version / changeable• responsible for rated current In of IZM • range of rated current: 250A-6300A

Take into account:

All adjustments are based on the rated current In!

NEWNEW



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XZMV

Differentiated trip indication

Indication of the trip reason:- overload (phases or N-conductor)- short circuit (delayed trip)- short circuit (instantaneous trip) - ground fault

Indicator is illuminated, if protocol-button is pressed

standard now

standard now




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XZMV Selective protection

Delayed short circuit release

Isd = 1.25 ... 12 x In (up to 0.8 x Icw for type R, D)

tsd = 0; 20 (M); 100 ... 400 ms for type V with OFF-setting for type U, R, D with tsd up to 4000 ms for type R, D (at reduced Isd)

M: special adjustment for motor protection with single phase sensitivity


NEWNEW



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XZMV

Test buttons

Test: Internal self test with or without tripping

Protocol: Finding the cause of trip

Clear: - Interrupt the test - clear memory (cause of trip)

standard now

standard now


TEST PROTOCOL CLEAR



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XZMV


Earth fault protection

XZMV+XT

• modificated trip unit• only available as plus type (not for retrofitting)

A B C D E

The current setting is depending on the frame size of the breaker. As reference you‘ll find a small glew lable on the front panel.



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Trip units: Special features for type U, R and D

Modular earth fault protection

• modular and suitable for retrofitting• available as a single- and plus-type• two different modifications:

• only alarm function• with alarm and trip function

XZMU XZMR

XZMD



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Trip units: Special features for type U

Optional 4-line display for universal trip unit:

LCD-display, very good readable because mounted with an angle of 15°, can be turned in vertical direction by 180°.

Installed with downward inclination

Installed with upward inclination

NEWNEW



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XZMU

Trip units: Special features for type U, R, D

Standard DIP switches

1. Thermal memory - can be switched on/off

2. Neutral protection:- can be switched on/off- adjustable to 50% or 100%

protection

3. Changing from I²t to I4t- adjustment of the characteristic in the overload range (for improved selectivity to fuses in the middle voltage)

NEWNEW



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XZMU


Modification of the characteristic

Overload range:

Standard: I²t = const.

modification: I4t = const.

for improved selectivity to (middle voltage) fuses

Short time delayed short circuit range:

standard: Isd = const.

modification: I²tsd = const.

(by using „I²tsd“-setting instead of „tsd“-setting)

for improved selectivity to

downstream fuses

NEWNEW



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XZMU


Instantaneous short circuit release

Adjustment: Ii = 1.5 ... 12 In

Ii = MAX Attention: MAX = 0,8 x Icw

Ii = OFF Attention: OFF: Ics = Icw

Ics = rated service short-circuit breaking capacity

Icw = rated short-time withstand current



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XZMU


Instantaneous short circuit releaseCalculating MAX and OFF

Example: IZMH2-U1600

- Ics= 100 kA /440VAC- Icw= 85 kA/ 0,5s

=> MAX = 0.8 x Icw= 68 kA

=> OFF = Ics= Icw= 85 kA/440VAC



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XZMR

Trip units: Special features for digital types R and D

• higher settings possible: e.g. - tsd up to 4 s - Isd up to 0.8 x Icw - 200% protection for neutral conductor

• adjustment of settings in smaller steps possible

• grahic display for type D (standard)



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Trip units: Digital overcurrent release XZMD

XZMD

Grafic LCD • enables a text output with 8 lines or

• the graphical representation of characteristics.

• it is used both to display data and to parameterise the overcurrent release as well as the metering function.

• the display is operated through the operation keys



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Grafic LCD: Display design

(1) Menu title

(2) 8-line alphanumeric display or graphical representation

(3) Status line



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Grafic LCD: Status line

(1) Access with password only

(2) Maintenance required

(3) Parameter set adjusted for protection functions

(4) Edit feature

(5) Adjusted trigger

(6) Possibilities of action



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Grafic LCD: Navigation in the menu structure



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Trip units: Digital overcurrent release XZMDGrafic LCD is displaying both: numerical values and graphical form

(1) Lowest measured value

(2) Present measured value

(3) Highest measured value

(4) 100% of the measured parameter

(5) Width of display



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Trip units: Digital overcurrent release with exclusiveexternal configuration XZMR

XZMR

Application: no access on site is allowed because

• high security is requested

• installation in public areas

No operating on site, no display available.

Parameterization only via parameter assignment module PG(E) or via PROFIBUS communication.

Ordering: Digital type with additional plus type +IZM-XZMR

! Always including COM-DP module and Breakter Status Sensor XBSS !



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Trip units: How to do the settings

1.

2.

3.

4.

4 protective ranges:

1. „L“ Overload protection

2. „S“ Short-time delay short-circuit prot.

3. „I“ Instantaneous short-circuit protection

4. „G“ Earth-fault protection

For each range all functions in one horizontal line:

• Current setting

• Graph with accentuated range

• LED for differentiated trip cause indication

• Delay time



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Trip units: Characteristics



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Moeller GmbH GB Leistungsschalter Protective note to rule DIN ISO 16016 is to be considered The new...

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Transcript of Moeller GmbH GB Leistungsschalter Protective note to rule DIN ISO 16016 is to be considered The new...