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Power Controls > Solid State Contactors > Eurotherm Series 7000

Watlow Single Phase Solid State Contactor - 7100L / 7100S

The 7100L range provides an effective replacement for electromechanical contactors. Fast switching reduces the thermal cycling of the elements resulting in improved control and extended element life. There are no mechanical contacts to wear out and so maintenance costs and downtime are reduced.

7100S has an optional thyristor short circuit and total load failure alarm. An over-temperature shut down is provided for the 250A fan cooled unit. An over-temperature alarm is also available.

Features & Benefits:

  • Current range: 16 - 250A at45°C Model dependent
  • Voltage up to 500V
  • Fast cycle times give increased heater life
  • High reliability with no mechanical contacts
  • Digital communications, model 7100S

Inputs

The 7100L units, with integral heatsinks, are driven by a logic input signal which can be either DC or AC.Firing is ON/OFF in response to the logic input, with zero voltage switching. A green 'heat' LED indicator on the front face indicates the status of the input signal.

7100S units can also be ordered with an analog 4/20 mA input which gives a linear time proportioned output

Fusing

High speed fuses are external to the unit and can be ordered complete with fuse holder as part of the order code. Spare fuses or complete fuse and fuse holder assemblies can also be ordered separately. 125 to 250 amp units have internal fusing.



Solid State RelaysTwo Leg, Three Phase Solid State Relay - 7200S

A range of three phase solid state contactors with integral heatsinks for use with low temperature coefficient resistive loads, 3-wire configuration in 'star without neutral' or 'closed delta'.

Fusing

In all cases the output is zero voltage switching. High speed fuses are mounted external to the unit for 100A and below, internal above 100A. They can be ordered as part of the 7200S or spare fuses / complete fuse and fuseholder assemblies can also be ordered separately.

Alarms

The 7200S has an optional thyristor short circuit and total load failure alarm. An over-temperature shut down is provided for fan cooled units and an optional over-temperature alarm is also available.

Diagnostic Load Failure detection is an option which alarms on the loss of one or more parallel heating elements (resistive). The sensitivity is one out of four maximum. It is auto-setting via the front panel push button.

  • Current range from 26 to 200A at 45C
  • Voltage up to 500V
  • Logic Inputs (AC or DC)
  • 4-20mA analog input which gives time proportional output
  • Suitable for resistive loads



Solid State RelaysThree Leg Three Phase Leg Solid State Relays - 7300S

A range of three phase, three leg solid state contactors for use with short wave infrared (SWIR) and Low Temperature Coefficient resistive loads.

Fusing

In all cases the output is zero voltage switching. High speed fuses are mounted external to the unit for 100 amps and below, internal above 100 amps. They can be ordered as part of the 7300S order code. Spare fuses or complete fuse and fuseholder assemblies can also be ordered separately.

Limits and Alarms

The 7300S has an optional thyristor short circuit and total load failure alarm. An over-temperature shut down is provided for fan cooled units (over 100 amps). An optional over-temperature alarm is also available. Diagnostic Load Failure detection is an option which alarms on the loss of one or more parallel heating elements (resistive or SWIR). The sensitivity is maximum one out of four. It is auto-setting via a front panel push button.

  • Current range from 16 to 160 amps at 45C
  • Voltage up 500V
  • Inputs: Logic (AC or DC) or Analogue 4-20mA which gives time proportional output
  • Digital Communications, Modbus communications allows digital control of unit




Solid State Relays
7100L


Solid State Relays
7100S


Spec Sheet 7100L (pdf)

Spec Sheet 7100S (pdf)
Spec Sheet 7200S (pdf)
Spec Sheet 7300S (pdf)


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