DMCR relays

The DMCR© relay has two patented design features which are unique to our product:

• 360° Dielectric Level Visibility: the DMCR© casing is a transparent reservoir which enables visibility of the dielectric level from all directions.
• Integrated Magnetic Protection: the magnet which triggers the dielectric level contact is ring-shaped and shields the reed switch from the influence of any external magnetic field up to 25 mT.

The DMCR© is manufactured in accordance with the European Standard EN 50216-3. The DMCR© is rated IK 10 and IP 56. The DMCR is equipped with an easily accessible drain tap and a bleeder on the top of the relay which serve the following two functions:

• enable gas or dielectric sampling through the opening and closing of the bleeder (a male G1/8 sampling petcock). The bleeder can be also used to remove small amounts of remaining air or gas in the relay with the use of an inverted pump. Opening and closing of the bleeder is done with a 13 wrench and a maximum tightening torque of 1.0 Nm should be applied when closing
• enable the dielectric oil filling of the DMCR relay through the removal of the drain tap and of the small float The DMCR is supplied with a complete fixing kit which includes:
  • a toric gasket in FPM
  • four M8 nuts, washers and brackets in zinc-plated steel (RoHS) or stainless steel (optional)

The standard version of the DMCR© offers the following functions:

Temperature:

• Two Adjustable Thermostat Switches with changeover contact for over temperature detection. Both the primary and secondary temperature thresholds are factory set at customer requirements within a 30°C to 120°C range.
• One Thermometer with maximum temperature indicator provides visual temperature information

Pressure:

• One Adjustable Pressure Swich with changeover contact. The tripping overpressure threshold of the pressure switch is factory set at customer requirement within a 100mbar to 500 mbar range

Dielectric Level:

• A Reed Magnetic Switch with changeover contact is triggered when a dielectric-level decrease of over 170 cm3 is achieved
• An integrated magnetic protection Shields the Reed Switch from any external magnetic field interference (patented design)

Presence of Gas:

• Gassing or dielectric-level decrease is initially visible through the lowering of a small float.
• This is followed by the lowering of the main float, visible all-round at 360°C (patented design), which triggers the Reed Switch Depending on customer requirements, there can be offered a number of different options on the DMCR© relay.

Please do not hesitate to contact us with any specific enquiry. Standard options include:

• a relay with a PT100 probe for dielectric temperature monitoring
• a relay with a flange suitable for use with a conservator tank
• a relay with two simultaneous contacts for pressure and dielectric-level
• a relay with IP66 protection