Ring Main Unit :
  RING MAIN UNIT : TYPE GR2


Introduction a new generation of SF6 Ring main units for system voltages up to 24kV, Designed for safety and reliability, the GR2 employs state-of-the-art-production methods.
Tested to IEC 298, 56, 265 and 129, the GR2 series is the answer to today's demand for high-performance, cost-effective secondary distribution switchgear.

KEY FEATURES

  • Compact

  • No fire risk

  • SF6 gas insulation

  • SF6 load-break switches

  • VCB or switch-fuse

  • Integral grounding and cable testing facilities

  • Fully interlocked

  • Minimal maintenance

  • Front cabling

  • Internal arc-fault proven

  • Motor mechanism option

  • Suitable for Distribution Automation systems

GR2-21 : 2-switchs + 1-circuit breaker (or switch-fuse GR2-21F)
GR2-30 : 3-switchs
GR2-22 : 2-switchs + 2-circuit breakers
GR2-31 : 3-switchs + 1-circuit breakers (or switch-fuse GR2-31F)
GR2-10 : 1-single switch (in/out cable boxes)

SPECIFICATION

Ring Switch Vacuum CB Switch-fuse
Rated Voltage (kV) 12/17.5 24 12/17.5 24 12/17.5 24
Impulse Withstand Voltage (kVp) 95 125 95 125 95 125
Power Frequency Voltage Withstand (kV) 38 50 38 50 38 50
Frequency (Hz) 50/60
Normal Current (A) 630 630 200
Breaking Current (kA) 0.63 0.63 25 20
Short-circuit Withstand Current (kA) 3S
Short-circuit Withstand Current (kA) 1S
20
25
16
20
20
25
16
20
20
25
16
20
Short-circuit Making Current (kA) 63 50 63 50 63 50
Ingress Protection Class Tank IP66, Enclosure IP3X
Ambient Temperature () -25 to +55

    

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1304, Kumkwang Benesta,1149-2, Jung-Dong, Wonmi-Gu,
Bucheon-city, Gyeonggi-do 420-020, KOREA