PDF《Compact pressure switch》

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6 Printed in Germany ? R?sler Druck ? Edition 02.

06 ? Nr.

225 901 Compact pressure switch for multiple actuators GW…A5 GW…A5/1 5.02 Technical description The GW…A5 pressure switch is a compact pressure switch for DUNGS multiple actuators. The pressure switches are suitable for switching a circuit on, off or over on changesinactualpressurerelativetothe set switching point (reference value). The switching point can be set eas- ily and quickly using a setting wheel provided with a scale without using a pressure gauge. Application Pressure switches for DUNGS multiple actuators GasMultiBloc and DMV dou- ble solenoid valve which can be either mounteddirectlyonhousingorbyusing an adapter. Suitable for gases of families 1,2,3 and other neutral gaseous media. Approvals EC type test approval as per EC Gas Appliance Directive: GW…A5 CE-0085 AO

3220 EC type test approval as per EC Pres- sure Equipment Directive: GW…A5 CE0036 Approvals in other important gas-con- suming countries. T?V (German Technical Inspectorate) test as pressure switch;

special con- struction type as per TRD

604 and VdT?V lea?et, Edition 100/1, as well as Class "S" as per EN 1854.

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6 Functional description Single-acting pressure switch in over- pressure range. The pressure switches operate without any power supply. Switching response GW…A5 Short response time during pressure ?uctuations. p COM NO NC

2 1

3 COM NO NC

2 1 p

3 N COM NO NC

2 1 p

3 N Switching function As pressure rises:

1 NC opens,

2 NO closes As pressure falls:

1 NC closes,

2 NO opens GW…A5/1 Slow response time during short-term pressure fluctuations by additional damping nozzle. Pressure Switch The GW…A5 is a single-acting pressure switch acting in pressure range. The control unit responds to pressure. If the set reference value is exceeded or undershot, the circuit is switched on, off or over. Speci?cations Max. operating pressure Pressure connection Measuring connection Temperature range Materials Switching voltage Nominal current Switching current Electrical connection Degree of protection Setting tolerance GW

3 A5 - GW

150 A5

500 mbar (50 kPa) GW

500 A5

600 mbar (60 kPa) O ring ?ange connection on underside of pressure switch ? 9, length

10 mm, with screw plug Ambient temperature -15 °C to +70 °C Medium temperature -15 °C to +70 °C Storage temperature -30 °C to +80 °C Housing: Aluminium die casting Switch: Polyamide Diaphragms: NBR Switching contact: Ag AC eff. min.

24 V max.

250 V DC min.

24 V max.

48 V GW 10…500 A5 GW

3 A5 AC eff. max.

10 A AC eff. max.

6 A AC eff. max.

6 A at cos ?

1 AC eff. max.

4 A at cos ?

1 AC eff. max.

3 A at cos ? 0,6 AC eff. max.

2 A at cos ? 0,6 AC eff. min.

20 mA AC eff. min.

20 mA DC min.

20 mA DC min.

20 mA DC max.

1 A DC max.

1 A Plug connection for line sockets as per DIN EN

175 301-803, 3-pin, protection insulated without ground connection IP

54 as per IEC

529 (EN 60529) ±15%switchingpointdeviationreferredtoreferencevalue,adjustedatpressure rises, vertical diaphragm position When the pressure switch is mounted in an intermediate position, its switching pressure deviates.

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3 1

2 3

1 2

3 1

2 3

1 2

3 1

2 3

1 2

3 1

2 3

1 2

3 1

2 3

1 2

3 1

2 3

3 1

2 3

1 2

3 1

2 3 Installation position Standard installation position GW 3…50 A5 max. ± 0,6 mbar GW

150 A5 max. ±

1 mbar GW

500 A5 max. ±

3 mbar In the horizontal installation position the switching pressure is increased. When the pressure switch is mounted horizontally overhead, its switching pressure decreases.