Moeller. Wiring manual. Automation and Power distribution

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Motor-protective circuit-breaker

PKZ2 – operating principle schematics

Moeller Wiring Manual 02/05

6-27

Indication by auxiliary contacts

Circuit-breaker with auxiliary contact and

trip-indicating auxiliary contact.

Example: PKZ2/ZM-... + NHI11-PKZ2 +

AGM2-11-PKZ2

For differential fault indication.

E1: Circuit-breaker On

E2: Circuit-breaker Off

E3: General fault, Overload tripping

E4: Short-circuit tripping

I >

-Q1

L2 L3 1.13 1.21

1.14

1.22

4.43

4.31

4.21

4.13

4.44

4.32

4.22 4.14

T1 T2 T3

-Q1

-Q1 -Q1 -Q1

-X1

-X1 -X1

-X1

X1X1

X2 X2

-E1 -E2 -E3 -E4

-X1

1.13

1.14

1.21

1.22

4.43

4.44

4.13

4.14

Motor-protective circuit-breaker

PKZ2 – operating principle schematics

Moeller Wiring Manual 02/05

6-28

Use of the undervoltage release in the Emergency-Stop circuit

Motor-protective circuit-breaker with auxiliary

contact and undervoltage release.

Example: PKZ2/ZM... + NHI22-PKZ2 +

UHI-PKZ2

All poles of the Emergency-Stop circuit are

isolated from the mains supply in the event of

a power failure.

S1: Emergency-Stop

S2: Emergency-Stop

I >

I >I >

L2 L3

-Q1

1.13

1.21

1.14 1.22

-X1

T1 T2 T3

-M1

U1 V1

1.31

1.43

1.32 1.44

2.14

U >

2.13

2.14

-Q1

-S1

-S2

-Q1

U <

Motor-protective circuit-breaker

PKZ2 – operating principle schematics

Moeller Wiring Manual 02/05

6-29

Remote switch off via shunt release

High-capacity compact starter with auxiliary contact and shunt release

Example: PKZ2/ZM-.../S-PKZ2 + A-PKZ2

Q11: High-capacity contact module

S1: Off

S2: On

S3: Circuit-breaker Off

I >

I >I >

L2 L3

-Q1

1.13

1.21

I>>

1.14

1.22

-X1

T1 T2 T3

-M1

-Q11

1.13

1.14

-Q1

-S1

-S2

-Q1

-S3

-Q11

Motor-protective circuit-breaker

PKZ2 – operating principle schematics

Moeller Wiring Manual 02/05

6-30

High-capacity compact starter with maximum number of auxiliary contacts fitted

Example: PKZ2/ZM.../S-PKZ2 +

NHI2-11S-PKZ2

K1: Circuit-breaker On

K2: Circuit-breaker Off

K3: Contact module Off

K4: Contact module On

K5: Contact module On

K6: Contact module Off

I >

I >I >

I >> I >> I >>

L2 L3

-Q1

1.13

1.21

1.14 1.22

-X1

-M1

U1 V1 W1

1.31

1.43

1.3 1.4

-Q11

-Q1

-Q1 -Q1 -Q1

1.13

1.14

1.21

1.22

-K1

-K2

-K3

-K4

-K5

-K6

Motor-protective circuit-breaker

PKZ2 – operating principle schematics

Moeller Wiring Manual 02/05

6-31

Remotely actuated circuit-breaker with switch status indication

Motor-protective circuit-breaker with remote

operator + auxiliary contact (1 NO, 1 NC) + trip

indicating auxiliary contact

Example: PKZ2/ZM.../RE + NHI11-PKZ2 +

AGM2-11-PKZ2

S1: On

S2: Off

S5: Reset

Q1: Auxiliary contact, indication: manual-auto

K1: Circuit-breaker On

K2: Circuit-breaker Off

K3: Overload indication

K4: Short-circuit indication

I >

I >I >

L2 L3

-Q1

1.13

1.21

1.14 1.22

T1 T2 T3

72 74

A20

A40

B20 34

4.43 4.31

4.21

4.13

4.44 4.32

4.22

4.14

1.13

1.14

-Q1

1.21

1.22

-Q1

4.43

4.44

-Q1

-K1

-K2

-K3

-K4

-S1

-S2 -Q1

A20 A40

B20

-Q1

4.13

4.14

-S2-S5

Motor-protective circuit-breaker

PKZ2 – operating principle schematics

Moeller Wiring Manual 02/05

6-32

Circuit-breaker with current limiter in separate mounting

Example: PKZ2/ZM... + NHI11-PKZ2 with

CL/EZ-PKZ2

K1: Circuit-breaker On

K2: Circuit-breaker Off

Q2: Current limiter, separate mounting

I >

I >I >

L2 L3

-Q1

1.13

1.21

I>>

I>>I>>

1.14

1.22

-Q2

-M1

-X1

-Q1

1.13

1.14

-Q1

1.21

1.22

-K1

-K2

Motor-protective circuit-breaker

PKZ2 – operating principle schematics

Moeller Wiring Manual 02/05

6-33

Special trip block ZMR-...-PKZ2 with overload relay function

For switching off a contactor in the control circuit

in the event of an overload by means of a trip

block ZMR-...PKZ2 with an overload relay function

and with simultaneous indication. The

circuit-breaker thumb-grip remains in the “On”

position. Circuit-breaker with trip block ZMR,

high-capacity contact module S and NHI11-PKZ2.

Q11: Shutdown

E1: Overload indication

Q11: High-capacity contact module

I >

I >I >

L2 L3

-Q1

1.13

1.21

1.14

1.22

-X1

T1 T2 T3

-M1

Q11

T1 T2 T3

-Q1

-X1

-E1

-Q1

-Q11

1.13

1.14

-X1

Notes

Moeller Wiring Manual 02/05

6-34

Moeller Wiring Manual 02/05

7-1

Circuit-breakers

Page

Overview 7-2

Overview, shunt releases 7-3

Undervoltage releases 7-4

Contact sequence of the auxiliary contacts 7-5

Internal circuit diagrams 7-7

Remote switch-off with voltage releases 7-9

Application of the

undervoltage release 7-11

Shutdown of the undervoltage release 7-12

Indication of the switch position 7-13

Short-time delayed circuit-breakers –

internal circuit diagrams 7-14

Mesh network circuit-breaker 7-15

Remote operation with motor operator 7-16

as a transformer switch 7-17

with residual-current release 7-18

IZM circuit-breaker 7-22

Moeller Wiring Manual 02/05

7-2

Circuit-breakers

Overview

NZM circuit-breakers

These circuit-breakers protect electrical

equipment against thermal overloading and in the

event of a short circuit. They cover the rated

current range from 20 to 1600 A.

Depending on the version, they have additional

protective functions such as fault-current

protection, earth-fault protection or the capability

for energy management by recognition of load

peaks, and deliberate load shedding.

Circuit-breakers NZM are distinguished by their

compact shape and their current-limiting

characteristics.

Switch-disconnectors without tripping units are

available in the same sizes as the circuit-breakers

and can be fitted with additional shunt or

undervoltage releases to suit on the versions

concerned.

Circuit-breakers NZM and switch-disconnectors

are built and tested to the specifications in

IEC/EN 60947.

They feature isolating characteristics. In

conjunction with a locking device, they are

suitable for use as main switches to

IEC/EN 60204.

The electronic releases of frame sizes NZM2,

NZM3 and NZM4 feature communication

capabilities.

The current states of the circuit-breaker onsite can

be visualized via a Data Management Interface

(DMI) or via digital output signals. Additionally,

the circuit-breakers can be connected to a

network, e.g. PROFIBUS-DP.

NZM1 NZM2 NZM3 NZM4