Low Voltage Distribution-Control Equipment
Modular system of switchgears and controlgears RNG – elaborated by ELMOR S.A. – is a complete construction-assembly solution in the scope of LV distribution-control equipment.
The Polish patent law protects many innovative solutions, which have been applied in RNG system.
Modular and unified construction allows for big flexibility during designing, production, exploitation and possible modifications.
RNG system assures among others:
 |
assembly possibility of different functional blocks in one switchboard, |
|
assembly possibility of stationary, plug-in and draw-out apparatuses, |
|
assembly possibility of functional blocks on fixed plates, plug-in plates or in draw-out units (drawers), |
|
application of fuse-switches as horizontal or vertical withdrawable units, |
|
possibility of internal division by means of fixed partitions or shutters, |
|
access to apparatuses from one or two sides, |
|
variety of supply and outgoing connections (top and bottom) by means of cables and bus bars, |
|
adaptability to different network systems: TN-S, TN-C-S, TT, IT, |
| resistance to aggressive industrial environment. |
Construction:
Switchboard frame of RNG system is made of steel
half-closed channel profiles 50x25 mm perforated every 25 mm. The profiles are
connected with a special corner connector by means of screws. Depending on
necessity and function, the switchboard frames can be completed with such
elements as: shields, doors, mounting panels, brackets, drawers guides, drawers,
foundation frames, roof.
Height of panels (boards), functional units ( fixed and placed in moveable drawers and plug-in plates) is a multiple of the basic construction module i.e. 25 mm.
All construction elements besides painted doors and external shields are made of Galfan – material of high resistance to corrosion. Galfan is a high quality steel sheet with alu-zinc coat.
Electric
system:
The
inside space can be divided depending on necessity into three
compartments:bus-bar compartment, apparatuses compartment, terminals compartment.
The compartments are separated with partition walls.
The
RNG
system provides following kinds off bus-bars:
|
horizontal main bus-bars placed in the bus-bars compartment, |
|
vertical bus-bars placed in the bus-bars compartment connected with the main bus-bars serving for supplying of functional units (eg. drawers) in individual switchboard panels, |
|
main neutral (N) and protective (PE) bus-bars placed at the front of the switchboard alongside the apparatus and terminal compartments. |
The RNG system is the optimally designed and tested bus-bar system of very high short-circuit current withstand. The system is assembled on special insulators made of modern insulating materials enabling easy connections and attachment without necessity to perforate the bus-bars. Bus-bars are made of copper.
The
RNG system offers many solutions of functional units wich can be designed
as single or double units. Apparatuses
of the functional units can be installed in the segments as fixed equipment or
in the drawers or plug-in panels. Drawers and panels are unified electrically
and mechanically.
Withdrawable
units (drawers) allow to limit supply interruptions of consumers or of any other
important receiver till the moment of taking out the unit from its compartment
and replacement it with an other one or till quick repair of small fault.
The
moveable drawers can be placed in four positions:
|
operation, |
|
test, |
|
disconnection, |
|
separation. |
In "test"
position it is possible to check the auxiliary circuits
assuring a safe pole gap (insulation clearance) in the main circuit.
Technical data:
|
Insulation rated voltage.................................... 660 V Rated frequency............................................. 50¸60 Hz Switching
voltage........................................... 220/440 V AC Rated current of supply and outgoing feeders................ 3000 A* Rated current of bus bars of one panel...................... 800 A* Rated withstand current 0,5s of: -bus bars.............................................. 115 kA -panel bus bars........................................ 50 kA Rated peak withstand current of: -bus bars.............................................. 253 kA -panel bus bars........................................ 153 kA Protection degree........................................... IP20-IP56
|
* - Higher values are possible after consultation with ELMOR S.A.
Dimensions of panels:
|
A |
500; 600; 800; 1000; 1200 | ||
| A1 | 200; 400 | |||
| B | 325; 425; 500; 625; 750; 875;1260 | |||
| H | 1850; 2050; 2250 | |||
|
Heights of segments H and of drawers K are multiples of a construction module u =25mm. Multiples for standard height of segment and drawers are following: |
||||
|
for H = 1850 mm - 74u |
||||
| for H = 2050 mm - 82u | ||||
|
for H = 2250 mm - 90u |
||||
| for K2 = 150 mm - 6u | ||||
|
for K3 = 250 mm - 10u |
||||
| for K4 = 375 mm - 15u | ||||
| for K5 = 500 mm - 20u | ||||
| for half drawers K1 = 200 mm - 8u | ||||
Tests and Certificates:
| POLISH REGISTER OF SHIPPING /PRS/ |
| MARINE ENGINEERING CENTRE – Gdańsk |
| ELECTROTECHNICAL INSTITUTE – Department in Gdańsk |
RNG system of switchgears had been tested within a range of full type tests (TTA) acc. to PN-IEC439-1 +AC and acc. to requirements and under PRS supervision and they have got the PRS Certificate of Type Approval.
|
|
|
|
|
Section of switchboard type RNG
|
Apparatuses compartments after taking out withdrawable units |
|
|
|
|
| Drawer in "disconnection" position | Drawer in "test" position (upper) | |
|
|
|
|
| RNG withdrawable unit | Bus-bar compartment of RNG system |
