Mining normal execution switchgears KRURN-6 LE (LE-RN) are designed to receive and distribute three-phase alternative-current of frequency 50 Hz and voltage of 6 kV in earthed neutral systems for electric installation protection and iron-ores and coal mines, pits, concentrated factories and other mining enterprises underground current receiver control without dust explosion

 

Applications

KRURN-6 are used for HV motor and iron-ore, miming, coal mines, boring, compressor and other industrial installations connection

Reliability

Conforms to State Standard of Ukraine 31.2-35036863-010:2009

 

Reference designation structure:

      1      2     3       4     5   6

LE-RN-6-ХХ-Х-ХХХ-Х-ХХ

1 – mining normal execution switchgears produced by LVEP “Lider Elektrik”;

2 – rated voltage [kV];

3 – scheme number;

4 – rated current [A];

5 – remote control board type (D – with remote-control station, О – without remote-control station);

6 – climatic region and placement category under GOST 15150-69

 

 

LE-RN-6 order designation example:

- consist of outgoing lines unit KRU with single-phase earth-fault directional, minimal voltage without delay at rated current 100A protection and remote-control station in case of order:

LE-RN-6–О1-О-100-D NC5  SS U 31.2-35036863-010:2009

 

-KRU without remote-control station consist of input at 630A, outgoing lines at 200 A, sectional at 315 A, outgoing lines at 50 A and input at 630 A units:

LE-RN-6–V2-G-630-0; О1-G–200-0; S1-G–315-0; О1-G–050; V2-G–630-0 NC5  SS U 31.2-35036863-010:2009

 

Dimensions and weights of KRURN-6 LE (LE-N)

Dimensions [mm]  (without placed voltage transformer)			Weight approx. [kg]
Width	Height	Depth
800	1700	1400	890

 

Technical data of KRUN-6 LE (LE-N) 

Parameters	Values
Rated voltage [kV]	6
Maximum operating voltage [kV]	7,2
Current type	alternating
Frequency [Hz]	50
Main circuit rated current: input and sectional units outgoing lines units	315; 400; 630 50; 100; 160; 200; 315; 400
Mechanical duration number	50000
Switching duration number at rated current	50000
Rated closed current [kA]: unit switch	10 20
Rated open current values [kA]: maximum peak start active value	25   10
Short-time withstand current [kA]	25
Short-time thermal current, 1s [kA]	10
Thermal withstand index **, [kА2s]	300
Maximum acceptable rated closing  current number	100
Switching wear duration number at rated closing current	30000
Mining designation under GOST 24719  and GOST 24754	MN1
Degree of protection under GOST 14254	IP54
Outgoing line type	cable