Circuit Protection Devices

Accessories for MCB, Switches, Residual Current Devices

Contents of this side:

• interconnecting busbars
• auxiliary contacts
• volt switch-off releases MX + OF (for remote switching-off)
• low-volt releases MN (for remote switching-off)

Other information:

	Terms of delivery
	information on claims
	Certificates and declarations
	How to buy at our company

Interconnecting busbars for circuit breakers and protective switches

As important accessories, these busbars are intended for mutual inteconnection of several circuit breakers, switches and protective switches. These are the copper interconnecting "reed" busbars with insulation. The contacts (reeds) are located at the busbar edges. This solution enables mutual interconnection of two busbars whereby the transmission load rating is doubled.

The advantages of the reed busbars consist mainly in the fact that the reed presses with the pressure (second) area of the terminal onto the conductor, thus it limits to the minimum any possible contact resistances, caused by insufficient transmission area at the forked busbars (the reeds can distend to sides, when being tightened). The connection cannot "burn-out" and the interconnecting circuit breakers and protective switches cannot be damaged

The contact´s (reed) dimensions are 4x12 mm, the busbar cross-section is 16 mm² and current load capacity with power supply away from the busbar edge is 80 A, with two interconnected busbars up to 160 A; if the power supply is in the centre of the busbar, the current load rating amounts to 130 A, with two interconnected busbars up to 260 A.

Table with the parameters of ampere-loading of the interconnecting busbars as to different cross-sections, power supply varieties and with interconnection of two busbars

Parameters of ampere-loading of the interconnecting busbars
		1 phase /two interconnected busbars						with 2,3 a 4 phases/two interconnecting busbars
intercon. busbar cross-section in mm2		10	12	16	20	25	36	10	16	25	36
power supply from the stip edge away max. current Is = A		63/126	65/130	80/160	90/180	100/200	130/260	63/126	80/160	100/200	130/260
power supply in the middle of the busbar maximum current Is = A		100/200	110/220	130/260	150/300	180/360	220/440	100/200	130/260	180/360	220/440

Range of goods of the interconnecting busbars for circuit breakers and protective switches
Order Code	Description	Loading rating A	Units m(pcs/ cross-section mm2	Basic price CZK/pce	Packing pce/case
07 - 0002	Copper interconnecting busbar, 1-pole, with contacts at busbar edges. There are 57 contacts with pitch 17,8 mm per 1 m	85 / 170	1 m / 16mm2	138,00	1 pce
07 - 0004	Copper interconnecting busbar, 2-poles	85 / 170	1 m / 16mm2	341,00	1 pce
07 - 0006	Copper interconnecting busbar, 3-poles, with contacts at busbar edges. There are 19 contacts with pitch of 17,8 mm per 1 m length .	85 / 170	1 m / 16mm2	313,00	1 pce
07 - 0008	Copper interconnecting busbar, 4-poles	85 / 170	1 m / 16mm2	698,00	1 pce
07 - 0011	Plastic terminal head for the 3-poles busbar		1 pce / 16mm2	8,20	10 pcs.

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Auxiliary contacts (for remote indication) for MCB BONEGA

The miniature circuit breakers can be linked-up with many accessories. (low-volt releases, ejecting coils, auxiliary contacts, etc.)

All those elements extend the application of the MCB by overvoltage or undervoltage protection, control, regulation, remote control, remote indication of switch-on and switch-off positions of the circuit breaker, programming and measurement. Those combinations enable the circuit breakers to be applied in the range of control of the complicated automated processes.

These elements can be mutually interconnected (e.g. MCB + undervoltage release + auxiliary indicating contact etc.), thus they can form different combinations.

Being mounted, it has to be attached to the left side of the circuit breaker; or combined with the VIGI module without any instruments. The VIGI module must be always bonded on the right side of the circuit breaker.

Mounting without using any instruments

Combination of electrical accessories (1 module 9 mm, max. width 54 mm):

Unit with auxiliary SD contacts:

- it includes 1 change-over contact indicating reaction of someone of the circuit breakers releases

- it indicates if the releases have switched-off the circuit breaker (overvoltage releases or MX or MN)

- the unit provides: - switch-off indicator with a red parachute on the front side of indicating contact

- resetting without switching-on the circuit breaker

- testing of functions

Unit with auxiliary OF contacts:

- it includes 1 change-over contact indicating condition of the circuit breaker

- the change-over contact which is involved in the control or indicating circuits and which indicates the circuit breaker positions ON or OFF

- test button on the front side of the auxiliary contacts serves as the check of signalling circuit without any circuit breaker handling

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volt switch-off releases MX + OF (for remote switching-off) for MCB BONEGA

- they enable to switch-off the circuit breaker from any place by conducting the voltage onto the release coil; simultaneously they can indicate the ON/OFF condition of the circuit breaker

- they enable to indicate the ON/OFf condition of the cirucit breaker by the same voltage by which the release is supplied

- it is fitted with the break contact put in series with the OFF coil

- all the volt releases are fitted with indication of the OFF condition (red parachute)

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low-volt switch-off releases MN (for remote switching-off) for MCB BONEGA

- it enables to switch off the circuit breaker with voltage drop or when pressing the switch-off button (to be used for circuits Total stop etc.)

- it switches off if the nominal voltage falls down under 70%

- it is possible to switch on the miniature circuit breaker when the voltage is > 85 % Un

- it avoids the circuit breaker to be switched-on again if the low-volt release is live

- the low-volt time-limit release MNS enables to overbridge any short-time voltage drops < 200 ms without being switched-off (delayed reaction)

- all the low-volt releases are fitted with switch-off indicator (red parachute)

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