circuit breakers for equipment protection · selection chart. q frame qz qf ql qy 3 3 2 277/480v...

CIRCUIT BREAKERS FOR EQUIPMENT PROTECTION

SELECTION CHART

Q FRAME

QYQLQFQZ

233

240/415V277/480V277/480V

N/AN/AN/A

25A63A50A

MEDIUMMEDIUMLOW

SWITCH ONLYSERIES TRIPAUX. SWITCH

ALARM SWITCH AUX / ALARM SWITCH





SERIES TRIPAUX. SWITCH

ALARM SWITCH (2nd pole)AUX / ALARM SWITCH

MINI RAIL DIN RAIL

SURFACE

MINI RAIL DIN RAIL

SURFACE

MINI RAIL DIN RAIL

SURFACE

BOX TERMINALSBOX TERMINALSBOX TERMINALS

STANDARD STANDARD STANDARD

86,0

13,0

66,0

86,0

13,0

65,0 (DIN) / 66,0 (MINI)

86,0

13,0

65,0 (DIN) / 66,0 (MINI)

86,0

18,0 (DIN) / 19,5 (MINI)

65,0 (DIN) / 66,0 (MINI)

STANDARD

BOX TERMINALSPLUG-IN

REAR STUDS

MINI RAIL DIN RAIL

SURFACE

120/240V AC

240/415V AC

277/480V AC

125V DC

80V DC

65V DC

5kA (1P)

3kA

3kA (1P) - 1kA (3P)

N/A

N/A

N/A

N/A

6kA

3kA

3kA

N/A

N/A

10kA

6kA

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

10kA

N/A

1

N/A

80V

50A

MEDIUMINSTANTANEOUS

TYPE

MAXIMUM NUMBER OF POLES

AC

PER POLE DC

MAXIMUM NOMINAL VOLTAGE

MAXIMUM RATED CURRENT

TIME DELAYS

RATED INTER.CAPACITY WITHOUTSERIES FUSE:

INTERNAL CIRCUIT

MOUNTING

TERMINATIONS

HANDLE TYPE

DIMENSIONS (mm)

COMPLIANCE / APPROVALS

ACCESSORIES

IEC60947-2/UL489/UL489-A/

VDE/IEC60947-2

* Dimensions for rocker handle, ** With rear studsMay 2002

H

W

D

D

H

W

/CSA/IEC/ /CSA/IEC/

MOUNTING HARDWAREHANDLE LOCK

ESCUTCHEON BLANKSSAFETY BLANKS







B FRAME C FRAME D FRAME E FRAME F FRAME

2 3 6 6 3

240V

65V

25A

SWITCH ONLYSERIES TRIPSHUNT TRIPRELAY TRIP

AUX. SWITCH

CENTRE LOCK NUTSNAP-IN

PUSH-ONPCB MOUNTED

PUSH-ONPCB MOUNTEDCLAMP TYPE

REAR STUDSCLAMP TYPE

PUSH-ONPLUG-IN

BATONPADDLESQUAREROCKER

PUSH-PULL PUSH-TO-RESET

40,0* / 35,0

17,3* / 17,3

40,0* / 33,5

50,8

19,0

41,2

63,5

19,0

49,0

131,8

26,0

101,3 ** / 66,3

210

50 / 105

100

SHORTSTANDARDCUT-OFF

STANDARDREDUCED STANDARD

ROCKERPADDLEBATON

STANDARD STANDARD

REAR STUDSBOX TERMINALCLAMP TYPE

REAR STUDSBOX TERMINALLUG TERMINAL

FRONT MOUNTINGSNAP-IN

FRONT MOUNTINGCENTRE LOCK NUT

SNAP-INDIN RAIL

FRONT MOUNTINGSURFACE MOUNTING

CLIP TRAY

FRONT MOUNTINGSURFACE MOUNTING



DUAL CONTROLAUX. SWITCHTRIP ALARM


AUX. SWITCH

SWITCH ONLYSERIES TRIPRELAY TRIP

AUX. SWITCHTRIP ALARM

AUX / ALARM SWTICH

INSTANTANEOUSLOW - MEDIUM - HIGH

INSTANTANEOUSLOW - MEDIUM - HIGH

INSTANTANEOUSLOW - MEDIUM - HIGH LOW - MEDIUM - HIGH

INSTANTANEOUSULTRA SHORT

LOW - MEDIUM - HIGHHIGH INRUSH

30A 100A (250A) 100A 250A (750A)

240/415V277V65V

277/480V

80V

240/415V

125V

240/525V

125/375V

LEGEND PLATEMOUNTING HARDWARE

SCREW TERMINALADAPTOR

INTERPHASE BARRIERSLEGEND PLATE

MOUNTING HARDWARE

HANDLE LOCKSHROUD

MOUNTING HARDWARE

INTERPHASE BARRIERSTERMINAL COVERS

HANDLE LOCKKEY LOCKING DEVICE

TANDEM BOX TERMINALSEXTENDED LUG TERMINALS

/CSA/IEC/UL489/

VDE (EN/IEC60934)SABS/ IEC/CSA

UL489-A

/CSA/IEC/UL489-A/

VDE (EN/IEC60934)

/ CSA/IEC/ TUV/

VDE (EN/IEC60934)

CBE SELECTION CHART

N/A

1kA

N/A

N/A

N/A

0.5kA

N/A

3kA

3kA - 1P

NA

NA

1kA

10kA

5kA

5kA

N/A

10kA

N/A

N/A

5kA

N/A

1.5kA

N/A

N/A

N/A

25kA

N/A

10kA

25kA

N/A

LIA TU YQ

OLN OH GC YET

Q

PRINCIPLE OF THE HYDRAULIC MAGNETIC CIRCUIT BREAKERS

Circuit Breaker Industries LtdCircuit Breaker Industries Inc.35E Uwchlan Ave, Suite 328,

Exton, PA 19341, U.S.A.Tel: 610 524 9949 * Fax: 610 524 9945

E-mail: [email protected] Website: www.cbibreakers.com

Circuit Breaker Industries GmbHPostfach 1240 D-86882Landsberg, Germany

Tel: +49 8191 9472900 * Fax: +49 8191 94729011E-mail: [email protected]

Website: www.cbibreakers.com

1 2 3 4

Hydrau l ic Magnet ic Circuit Breakers (HMCB) operate on the magnetic force produced by a load current flowing through a s e r i e s c o n n e c t e d solenoid coil which is w o u n d a r o u n d a n hermetically sealed tube containing an iron core, a spring and dampening fluid.

At currents below the circuit breaker rating, the magnetic flux in the solenoid is insufficient to attract the core towards the pole piece due to the spring pressure.

Where an overload occurs, i.e. currents above the circuit breaker rating, the magnetic flux in the solenoid produces sufficient pull on the core t o c o m m e n c e i t s movement toward the pole piece.

During this movement, the hydrau l i c f l u id regulates the cores speed of travel, thereby creating a controlled time delay which is inversely propor t ional to the magnitude of the current.

This time delay is useful in that if the overload is of short duration, i.e. start up of motors, etc, the core returns to its rest p o s i t i o n o n c e t h e overload disappears.

If the overload persists, the core reaches the pole piece after a time delay particular to that current and in so doing, the r e l u c t a n c e o f t h e magnetic circuit drops considerably, so that the armature is attracted to the pole face wi th s u f f i c i e n t f o r c e t o co l l apse t he l a t ch mechanism (toggle) and consequently trip the breaker.

The contacts separate, the current ceases to flow, and the core returns to its rest position.

With high values of overloads or short circuit, t h e m a g n e t i c f l u x produced by the coil is sufficient to attract the armature to the pole face and trip the breaker even though the core has not moved. This is called the instantaneous trip region of the circuit breaker characteristic.

Unlike thermal circuit breakers, the hydraulic m a g n e t i c c i r c u i t breaker’s trip point is unaffected by ambient temperature. After tripping, the breaker may be re-closed immediately since there is no cooling down time necessary.

By the nature of the principle of operation, it is possible to obtain any variation of time / current characteristic.

FEATURES

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!

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Circuit breakers can carry 100% of rated current independent of ambient temperature.

Always trip at 125 % of rate d curren t indepe ndent of amb ie nt tempe rature.

Immediate resetti ng after t rip.

Any current rating possible.

Large range of time delays available.

Private Bag 2016 Isando 1600Tripswitch Drive, Elandsfontein,

Gauteng, South AfricaTel: +27 11 928-2000 * Fax: +27 11 392-2354

E-mail: [email protected]: www.cbi.co.za

Trip Latch Trip Trip Armature

Pole

OilSpring

CoilTube

Frame

Core

circuit breakers for equipment protection · selection chart. q frame qz qf ql qy 3 3 2 277/480v...

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