SF6 density relay is widely used in high and medium voltage switch power electrical industry. The product absorbs the advanced technology of the same industry at home and abroad and has a unique and advanced temperature compensation function. The product is to detect and control the density of SF6 gas inside the high and medium voltage switches and electrical equipment to ensure normal operation of the equipment and prevent damage to the equipment when SF6 gas leaks, thus playing a protective role for the equipment.
Working Principle
SF6 density relay is SF6 gas pressure through temperature compensation to display the density of SF6 gas, the product in the use of temperature range at any temperature indicates the pressure value is the pressure (density) value of room temperature 20 ℃, when the equipment is filled with rated pressure of SF6 gas, SF6 gas by the temperature of the pressure value of the corresponding change, then the product temperature compensation device will change the value of The temperature compensation device of the product will compensate the change value, so that the pressure value will remain unchanged. Only when the SF6 gas leaks, the pressure drops to the alarm pressure value, the instrument issues an alarm signal, prompting the staff that the pressure of SF6 gas inside the equipment drops, and the pressure drops to the blocking pressure value, the instrument issues a blocking signal, and the control mechanism will stop the operation of the equipment.
Features
Housing is made of high quality stainless steel, never rusts, beautiful atmosphere
The density value displayed on the dial panel (corresponding pressure value at 20°C) and the green and red color indicated on the dial are different working areas, which are not affected by the ambient temperature
The temperature-sensitive element is made of imported materials, with high precision, stable and reliable performance
The use of threaded joints articulated to install more simple, longer service life; stable performance out
Safe to use, easy to maintain, more flexible installation methods
With a variety of interface connection, can be used with various types of self-sealing valve, suitable for a variety of SF6 equipment at home and abroad
Technical parameter
Scale range:1-3bar
Accuracy : 1.5 grade (20℃) 2.5 grade (-40℃-60℃)
Joint thread:M24*1.5/M27*1.5 (Available on request)
Operating conditions: -40℃-60℃
relative humidity ≤95%RH
Degree of protection:IP67
Impact resistance: 300m/S²
Vibration resistance:20m/S²
Insulation strength:AC2000V/min 50/60Hz
Insulation resistance:≥100MΩ
Annual leakage rate:≤1X10-9bar.m3/s
Contact capacity:AC/DC250V 50VA/30W
Maximum working voltage: AC 380V