outgoing cables.
++++Structure Features
1) compartment
busbar compartment; circuit breaker compartment; cable compartment; low-voltage compartment.
1 - main device: circuit breaker, contactor,
2 - current transformers,
3 - earthing switch,
4 - voltage transformers,
5 - support-bushing insulators,
6 - bushing insulators
7 - surge arresters,
8 - support insulators (reactance),
9 - main busbars.
10 - connecting (distribution) busbars,
11 - earth-fault current transformer,
12 - earthing conductor,
13 - metal movable particions,
14 - cable ducts (optionally),
15 - vent flaps,
++++Schematics of dimensions of switchgear
++++Main components characteristics
++++Photos of frontal view
++++Transportation, Maintenance and Order
Transportation and Storage
The switch cabinet can be transported by fork truck if guaranteed to be fixed on the bottom plate, and
by handling or removing the entire entity if not fixed on bottom plate, but any case it should be
transported vertically, no allowance for inversion in order not to damage the internal components.
The switch cabinet(even for that with outer package) should not be exposed outside for storage for a
long time. The switch cabinet that needs the long-term storage should be put in the dry and ventilate
indoor warehouse. The period of validity of outer package of switch cabinet is normally no more than 1
year.
Maintenance
Free of maintenance for 3 years under the normal conditions.
There is no need of maintenance and any lubrication for the single-spring and dual-spring operation
mechanism of load switch.
The relay protection device should be checked by the requirement of the manufacturer before put into
the running.
The maintenance periodicity for ring main unit is normally one time every year.
Maintenance by the below requirement:
Fasten all the electrical connectors(main bus bar, switch, cable, measuring meter)required by
Installation and Operation Instruction.
Clean all the parts by dust collector(main switch, auxiliary switch, tripping mechanism, motor etc.) and
check the appearance.
Have a switching on/off operation for all switches including earth switch.
Turn on auxiliary control electric source not giving the remote control signal to have a electrical order
operation.
Clean the busbar cubicle and cable cubicle.
Order
Complete-set Product:
The below documents are attached with the switch panel when out of factory;
Qualification Certificate of Product;
Installation and Operation Instruction;
Packing List;
Engineering Design Document of Product;
Accessory of switch panel :
one operating handle of load switch attached with each complete set;
The customer should offer the following information for order:
Wiring diagram of Main circuit Loop and Special Technical Requirement;
Installation Arrangement Plan of switch panel;
Specification of component inside switch panel and the schematic diagram of auxiliary loop and
control loop diagram.
Other written documents specially required.