Protech megaMAX User Manual download pdf (Page 10)

MNS Light F, MNS Light SR, Catalogue 1TSC 2210-EN, ed. 2, March 1999

Supply cubicle

Design

The supply cubicle is manufactured according to SS 436 21

31, issue 2 and in collaboration with the Swedish Electricity

Board.

The cubicle has space for incoming units and measurement

equipment.

Protection class IP21.

Current transformer insert

Current transformers are mounted on removable busbars and

are easy to change. The space is sealed and only intended for

the energy supplier's equipment. Also contains voltage fuses.

Measurement circuit breaker

The circuit-breaker, which is a MCCB, makes up the measure-

ment fuse and main switch. It is of the Sace Isomax type and

has the following functions:

- short-circuit protection in the form of a direct magnetic

overcurrent release, individually settable on each phase

- adjustable thermal overload release

- two change-over auxiliary contacts

- a shunt release

- a signal contact

The measurement circuit-breaker is available in fixed

mounted and withdrawable versions. (Withdrawable to facili-

tate disconnection, or when both measured and unmeasured

cubicles and fed from the supply and distribution cubicle.)

Switch-fuse circuit-breaker

The incoming units consists of up to six switch-fuses with

breaking on both sides of the fuse.

Connections are made from below and cables are not bent. The

height of the space from the ground is more than 600 mm.

Supply and distribution fuses

Supply fuses are changed when the unit is dead. The door for

each incoming unit is interlocked with the switch and can only

be opened with the switch in the closed position.

Sealed areas for the electricity

supplier's measurement transformers

and voltage fuses. Withdrawable

busbars mean the transformers can

be retrofitted or changes.

Space for the main switch and

instruments.

Space for up to six parallel

incoming units with switch fuses.

Free space at the bottom for the

connection of incoming supply and

distribution cables.

Switch-fuse in the supply cubicle. Due

to breaking on both sides fuse

replacement always takes place when

the unit is dead. The door is

interlocked and can only be opened

when the switch is in the closed

position.

The supply cubicle has plenty of

space for incoming cables.

800 mm

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