Three Phase Thyristor based Solid State Relay Module – SSR-3-ZC

Libratherm Instruments Pvt. Ltd.
Libratherm Instruments Pvt. Ltd.
Libratherm Instruments Pvt. Ltd.
Libratherm Instruments Pvt. Ltd.

Three Phase Thyristor based Solid State Relay Module – SSR-3-ZC

SSR-3-ZC – Three Phase Thyristor based Solid State Relay Module.
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Libratherm offers ready-to-use 3 phase Zero Cross over thyristor-based solid state relay module SSR-3-ZC-2L and SSR-3S-ZC-3L for electrical heating loads ranging from 3KW to 60KW @ 415/440VAC. This SSR module comprises of Libratherm make triggering card, which generates the zero cross over firing pulses to control suitably rated back to back connected SCRs, which is duly mounted on the heat sink with an input terminal for control signal and heavy-duty bus bars for heaters and incomer AC power supply. The entire assembly is mounted in MS powder-coated enclosure, which in turn can be easily mounted inside the closed control panel as desired.

Complete ready to use control panel with a suitable PID / Program temperature controller can also be supplied as per the user’s specifications and requirement.
Key Features:
  • Uses High PIV Semikron make SCR modules (SKKT series)
  • 3 phase load / 2 leg star/delta or 3 leg star control.
  • Accepts DC pulse (12-24) VDC as the control signal from the external controller.
  • Simple and Modular design for easy servicing of cards and thyristors.
  • Suitable for resistive heating loads.
  • Finds application in 3 phase Air heaters in Ovens/Furnace/AHU / DHU/ HVAC etc.
  • Compatible with DDC/PID/PLC of any brand.
ParameterDescription
Available Ratings9KW to 90KW @ 3 phase 415/440VAC
Heater LoadThree phase 3 or 4 wire star or 3 wire close delta.
Control ActionZero cross over firing
Control Signal12 to 24VDC logic pulse or contact from external PID/DDC controller.
Switching Output0 to 230VAC or 0 to 415/440 VAC variable on/off duty cycle directly proportional to the control signal.
Load TypeSuitable for resistive heaters.
Incomer Supply Voltage415/440 VAC, 50/60 Hz. (User should specify)
DimensionsAs specified in the Ordering Information table
Mounting Thyristor module can be mounted on the base plate of the control panel.
(User must Ensure proper AIR circulation around the module)
Mounting Holes4mm x 4 @ 150 H x 90 W mm / 5.5mm x 4 @ 120 H x 168 W mm
ModelProduct DescriptionSizePart No.
SSR-3-ZC-2L-25 Three Phase Thyristor based 2 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or Delta configuration
(9 to 15KW @ 415/440VAC) Natural Air Cooled.		165 x 170 x 1452906-1
SSR-3S-ZC-3L-25Three Phase Thyristor based 3 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or 4 wire Star configuration
(9 to 15KW @ 415/440VAC) – Natural Air Cooled.		165 x 170 x 1452906-2
SSR-3-ZC-2L-50Three Phase Thyristor based 2 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or Delta configuration
(16 to 30KW @ 415/440VAC) Natural Air Cooled.		165 x 170 x 1452906-3
SSR-3S-ZC-3L-50 Three Phase Thyristor based 3 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or 4 wire Star configuration
(16 to 30KW @ 415/440VAC) – Natural Air Cooled.		165 x 170 x 1452906-4
SSR-3-ZC-2L-100Three Phase Thyristor based 2 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or Delta configuration
(31 to 60KW @ 415/440VAC) – Force Air Cooled (through FAN).		230 x 190 x 1702906-5
SSR-3S-ZC-3L-100 Three Phase Thyristor based 3 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or 4 wire Star configuration
(31 to 60KW @ 415/440VAC) – Force Air Cooled (through FAN).		230 x 190 x 1702906-6
SSR-3-ZC-2L-150Three Phase Thyristor based 2 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or Delta configuration
(66 to 95KW @ 415/440VAC) – Force Air Cooled (through FAN).		230 x 190 x 1702906-7
SSR-3S-ZC-3L-150Three Phase Thyristor based 3 leg solid state relay module –
suitable for 3 phase heaters connected in 3 wire Star or 4 wire Star configuration
(66 to 95KW @ 415/440VAC) – Force Air Cooled (through FAN).		230 x 190 x 1702906-8
Model with 3L is recommended only for 3 or 4 wire Star connected load – not for Delta load.
Model with 2L is recommended only for 3 wire Star or 3 wire close Delta load.

Product Category

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