gas density relay magnetically assisted electrical contact pointer relay SF6

SF6 gas density relay magnetically assisted electrical contact pointer relay SF6

Table circle diameter: 100

Calibration pressure PE: subject to customer specifications

Accuracy specification requirements:

■ ±1 % at +20 °C ambient temperature

■±2.5 % at ambient temperature of -20 … +60 °C, calibration pressure consistent with reference contour (reference figure KALI-Chemie AG, Hanover, Dr. Döring, 1979)

Scale range:

Measuring range 0.16…2.5 MPa vacuum and overpressure range (20 °C ambient temperature and gas phase state)

Allowable ambient temperature:

Operating: -20 +60 °C (-4 +140 °F), gas phase

Storage: -50 +60 °C (-58 +140 °F)

Process connection:

G ½ B (according to EN 837), radial direct mounting stainless steel, wrench width across flats 22 mm

Other connection methods or connection locations can be provided according to customer requirements.

Pressure element:

stainless steel, welded

Air tightness: Leakage rate ≤ 1 • 10-9 kPa • l/s

Test method: Helium mass spectrometry test

Movement: stainless steel, bimetallic sheet (temperature compensation)

Dial: Aluminum

shell:

    Stainless steel, gas filled type

    Stainless steel, liquid filled

Air tightness: Leakage rate ≤ 1 • 10-6 kPa • l/s

Watch glass:

    Laminated safety glass

    Transparent anti-cracking plastic

Cover ring:

Bayonet adapter, stainless steel, fixed with 3 solder points

Allowable humidity:

≤ 90 % r. h. (non-condensing)

Protection level:

IP 65 according to EN 60529/IEC 529

weight:

Gas filled type: approx. 0.8 kg

Liquid filled type: approx. 1.2 kg

100% high voltage test:

2kV, 50Hz, 1s

Switch contact:

Electrical connections

Electrical terminal box with M20 x 1.5 locking ferrule Cable cross-section 2.5 mm²

Number of switch contacts:

    1 magnetically assisted electrical contact

    2 magnetically assisted electrical contacts

    3 magnetically assisted electrical contacts

Switch direction:

    descending pressure

    rising pressure

Switch function:

    Normally open

    Normally closed

    Changeover contacts (2 more switching points)

Circuit:

    Electrical connection (not applicable to transfer contacts)

    electrical isolation

Switch accuracy:

Switching point = calibrated pressure PE: see accuracy specifications

Switching point ≠ calibration pressure PE: shift to calibration pressure

Switching voltage:

AC 250V

switching power

Gas filled version: 30 W / 50 VA, 1 A

Liquid filled version: 20 W / 20 VA, 1 A

Switching point material: 80 % Ag / 20 % Ni, gold plated

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