Temperature compensated pressure switch –Liquid Free Type-

The newly evolved temperature compensation switch has arrived. This is installed in Gas Insulated Switchgear (GIS) and Gas Circuit Breaker (GCB) of nuclear / thermal / hydraulic power stations to monitor the pressure and density of SF6 gas which is an electric insulating medium. This new model is liquid-free and light weight at a more reasonable price.

Catalogue (PDF)

Example for setting pressure

Unit::MPa  Setting temperature:20℃

Rated pressure 1st contact (lower limit) 2nd contact (lowest limit)
0.35 0.30 ±0.02 0.25 ±0.02
0.50 0.45 ±0.02 0.40 ±0.02
0.55 0.50 ±0.02 0.45 ±0.02
0.60 0.55 ±0.02 0.50 ±0.02

Main specifications

1)Ambient temperature -20℃~+40℃
2)Temp. compensation range -20℃~+60℃
3)Indication accuracy ±1% F.S. (at +20ºC)
4)Scale range (example) -0.1MPa(-76cmHg)~1MPa (10kgf/cm2)
5)Contact mechanism Magnet assist type (2 lower limits)
6)Contact capacity more than 0.05A at 250V AC, more than 0.1A at 125V AC (inductive breaking current)
more than 0.13A at 250V DC, more than 0.26A at 125V DC   (non-inductive breaking current)
7)Max. allowable gas leakage 1 × 10-9 Pa・m3/s or less
8)Operating vironment Both indoors and outdoors
9)Weight Approx. 1.35 kg