YRM6 fully insulated fully enclosed compact switchgear, which can realize functions of control, protection, measurement, monitoring, communication, etc. is especially suitable for places with small distribution facility site and high reliability requirements, and places with a relatively harsh natural environment and conditions. such as underground, highland and coastal areas.

lt is mainly used in areas where land is tight and space is limited, high reliability is required, like industrial and mining enterprises and substations, subways, light rail railways, etc.

Selection

Operating conditions

1. Ambient air temperature: -40℃~+40℃;

2. Relative air humidity: daily average <95%, monthly average <90%;

3. Altitude ≤1500m (under standard inflation pressure);

4. Seismic intensity <9 class;

5. Places free from fire, explosion, serious contamination, chemical corrosion and severe vibration.

 Special conditions

Manufacturers and end users must agree on special Operating conditions that are different from normal operating conditions; lf a particularly harsh operating environment is involved, the manufacturer and supplier must be consulted;

When electrical equipment is installed at an altitude of 1500 meters or more, special instructions are required to adjust the pressure during manufacturing. When the pressure is adjusted, the life of the switchgear itself has no significant effect.

Features

● Modular design

The switch is divided into fixed module and expandable module group. In the same SF6 insulated air chamber, up to6 modules can be  configured. Switching cabinets with more than 6 modules must be connected with the expansion busbar to realize the semi-module.    Structure, full module configuration can also be achieved by using an extended bus between all modules. Through the combination of different functional modules, a simple to complex power distribution scheme can be formed to meet various configuration requirements  in the secondary substation and the opening and closing.

● Compact structure

Except for the air-insulated metering cabinet, all modules are only 325mm wide and the metering cabinet width is 695mm; the cable joints of all units are the same height to the ground, which is convenient for on-site Features.

● Unaffected by the environment

All high-voltage live parts are installed in a sealed stainless steel case. The case is welded with a stainless steel plate and filled with SF6 gas at a working pressure of 1.4 bar. The degree of protection is IP67.It can be used in places where it is installed in damp, dusty, salt   spray, mine, box-type substation and air pollution. Even the fuse compartment has an lP67 rating. The extension busbars are completely insulated and shielded to ensure that they are not affected by changes in the external environment.

● Highly reliable personal safety

All live parts are enclosed in the SF6 air chamber, the switch has a reliable pressure relief channel, the load and grounding switches are three-position switches, simplifying the interlocking between each other, reliable mechanical interlock between the cable compartment cover and the load switch .

Performance Index

● SF6 gas pressure: 1.4bar under 20℃ (absolute pressure)

● Annual leakage rate: 0.25%/year

● Protection grade    SF6 gas room: IP67 Fuse tube: IP67

● Switchgear enclosure: IP3X

● Busbar

Switchgear internal busbar: 400mm2Cu  Switchgear earthing busbar: 150mm2Cu

Thickness of gas room stainless steel enclosure: 3.0mm

● The front panel and the side panel of the switchgear, and the front cover of the cable room, the company's standard color is: jade color 7783; if users have special requirements, please put forward when ordering.

Standard

● High-voltage alternating-current circuit-breakers (IEC 62271-100:2001, MOD)

● High-voltage alternating-current disconnectors and earthing switches (IEC 62271-102:2002,MOD)

● Common specifications for high-voltage switchgear and controlgear standards

● High-voltage alternating-current switches for rated voltage above 3.6kV and less than 40.5kV(IEC60265-1-1998,MOD)

● Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV (IEC62271-200-2003, MOD)

● Degrees of protection provided by enclosure (IP code) (IEC 60529-2001,IDT)

● High-voltage alternating current switch-fuse combinations (IEC6227-105-2002,MOD)

● DL/T 402 Specification of high-voltage alternating-current circuit-breakers (IEC 62271-100-2001,MOD)

● DLT 403 HV vacuum circuit-breaker for rated voltage 12kv to 40.5kv

● DLT404 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up toand including 40.5kV

● DL/T 486 HVAC disconnectors and earthing switches (IEC62271-102-2002,MOD)

● DLT593 Common specifications for high-voltage switchgear and controlgear standards IEC 60694-2002,MOD)

● DLT 728 Technical guide for the order of gas-insulated metal-enclosed switchgear (IEC815-1986, IEC 859-1986)

● DL/T 791 Specification of indoor AC HV gas-filled switchgear panel

Technical data

Note 1: depends on the rated current of fuse.

Standard modules

Each module of the YRM6 type switchgear has the following configurations：
● D cabinet - lifting module
See standard configuration and features in "cable connection module without grounding knife" ● C cabinet - load switch module
See standard configuration and features in "load switch module"
● F cabinet-load switch and fuse combination module
See standard configuration and characteristics in "load switch and fuse combination module" ● V cabinet - vacuum switch module
See standard configuration and features in "vacuum switch module"
● Capacitive voltage indicator for the incoming bushing
Install a pressure gauge that monitors SF6 density in each chamber
● Lifting lug
● Operating handle

Optional configurations

Electric operating mechanism/cable short circuit and ground fault indicator/current transformer and meter

Standard 2 circuits DF (260kg)                               Standard 2 circuits CCC (3000kg)

Optional configurations

Optional configurations

Standard expansion modules

Note: A single module must add extension before it can be used.