Transformer protection

Temperature relays protect dry-type transformers from overheating by monitoring the temperature of the winding and core using PTC thermistor sensors or Pt 100 (RTD) sensors. RTD (Resistance Temperature Detector) and PTC (Positive Temperature Coefficient) are two different types of thermistors...

Temperature relays protect dry-type transformers from overheating by monitoring the temperature of the winding and core...

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Products that are marked "On Order" in the "Available Quantity" column are usually not in stock. Such products are available for purchase, however, due to their limited customer base, they usually have higher minimum quantities. DACPOL offers products that are not in stock for the following reasons: DACPOL currently has a large number of electronic components in stock and adds new products every day, however, tens of thousands of additional components and their various variants are available from our suppliers. Even though it is unreasonable to have all these products in stock due to the limited sales, we believe that it is in the best interest of our customers to make them available. Our goal is to inform customers about the maximum number of products available and enable them to make decisions based on specifications, prices, availability, required minimums and our technical advice. Please note that selecting the "In Stock" checkbox may limit the display to only products available for delivery straight from the shelf.
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picture_as_pdf TR660IP-ANALOG -... ZIEHL TR660IP-ANALOG - Temperature Relay - T224370 SEE IT T224370 On Order AC/DC 24 - 270 V Glass fiber reinforced PBTP material IP54 motor, IP20 electronics Customer specific / IP 6K9K customer-specific Analog Outputs 0/4-20 mA, 0-10 V, Outputs/Relays, Ethernet TCP/IP Steel sheet, galvanized and coated with cement-gray plastic (RAL 7033)
picture_as_pdf TR1200IP - Pt 100... ZIEHL TR1200IP - Pt 100 Temperature Relay - T224078 SEE IT T224078 On Order -- -- IP54 motor, IP20 electronics Customer specific / IP 6K9K customer-specific -- Impedance protection
picture_as_pdf TF101G3 - Pt 100... ZIEHL TF101G3 - Pt 100 Temperature Sensors - T223143 SEE IT T223143 On Order -- Made of metal -- -- IP 30 (IP 44, with bracket and cover) -- Impedance protection
picture_as_pdf TR640IP - Temperature Relay... ZIEHL TR640IP - Temperature Relay - T224390 SEE IT T224390 On Order AC/DC 24 - 270 V Glass fiber reinforced PBTP material IP54 motor, IP20 electronics Customer specific / IP 6K9K UL/CSA, UKCA Outputs/Relays, Ethernet TCP/IP Reverse polarity and locked rotor protection.
picture_as_pdf TR600-ANALOG - Pt 100... ZIEHL TR600-ANALOG - Pt 100 Temperature Relay - T224360 SEE IT T224360 On Order AC/DC 24 - 240 V Glass fiber reinforced PBTP material IP54 motor, IP20 electronics Customer specific / IP 6K9K IP44 / depending on mounting and position as per EN 60034-5 Analog Outputs 0/4-20 mA, 0-10 V, Outputs/Relays Electronic protection against blocked rotor.
picture_as_pdf TR440-BASIC - Transformer... ZIEHL TR440-BASIC - Transformer Protection Temperature Relay - T224184 SEE IT T224184 On Order AC/DC 24 - 240 V Die-cast aluminum, painted black IP54 motor, IP20 electronics Aluminum. Housing with grounding eyelet for M4 x 8 (Torx) screw. 48V version, screws included. IP 30 (IP 44, with bracket and cover) Outputs/Relays, Interface/Bus Impedance protection
picture_as_pdf TR400 - Pt 100 Temperature... ZIEHL TR400 - Pt 100 Temperature Relay - T224380 SEE IT T224380 On Order AC/DC 24 - 240 V Glass fiber reinforced PBTP material IP54 motor, IP20 electronics Customer specific / IP 6K9K IP44 / depending on mounting and position as per EN 60034-5 Analog Outputs 0/4-20 mA, 0-10 V, Outputs/Relays Impedance protection
picture_as_pdf TR250 - Temperature Relay -... ZIEHL TR250 - Temperature Relay - T224190 SEE IT T224190 On Order AC/DC 24 - 240 V Die-cast aluminum IP54 motor, IP20 electronics Customer specific / IP 6K9K customer-specific Outputs/Relays Reverse polarity and locked rotor protection.
picture_as_pdf TS1000 - Trafosafe - T221660 ZIEHL TS1000 - Trafosafe - T221660 SEE IT T221660 On Order AC/DC 24 - 240 V Black painted steel sheet IP54 motor, IP20 electronics Motor IP44, electronics IP20 / depending on mounting and position -- Outputs/Relays Electronic protection against reverse polarity and locked rotor.
picture_as_pdf MSF220VL - PTC Relay - T221674 ZIEHL MSF220VL - PTC Relay - T221674 SEE IT T221674 On Order AC/DC 24 - 240 V Glass fiber reinforced PBTP material IP54 motor, IP20 electronics Customer specific / IP 6K9K IP44 / depending on mounting and position as per EN 60034-5 Outputs/Relays Electronic protection against reverse polarity and locked rotor.
picture_as_pdf MSF220V - PTC Resistor... ZIEHL MSF220V - PTC Resistor Relay - T221738 SEE IT T221738 On Order AC 220-240 V Black painted steel sheet IP54 motor, IP20 electronics Customer specific / IP 6K9K IP44 / depending on mounting and position as per EN 60034-5 Outputs/Relays Electronic protection against reverse polarity and locked rotor.
picture_as_pdf MSF220SE-AC-DC90-240 - PTC... ZIEHL MSF220SE-AC-DC90-240 - PTC Relay - T221697 SEE IT T221697 On Order AC/DC 90-240 V Black painted steel sheet IP54 motor, IP20 electronics Motor IP44, electronics IP20 / depending on mounting and position IP 30 (IP 44, with bracket and cover) Outputs/Relays Electronic protection against reverse polarity and locked rotor.
picture_as_pdf MS-TESTER - MS Tester -... ZIEHL MS-TESTER - MS Tester - T221734 SEE IT T221734 On Order -- Made of metal IP54 motor, IP20 electronics Motor IP44, electronics IP20 / depending on mounting and position IP 30 (IP 44, with bracket and cover) -- --
picture_as_pdf UR840IP - Universal Relay -... ZIEHL UR840IP - Universal Relay - T224353 SEE IT T224353 On Order AC/DC 24 - 270 V PP plastic IP54 motor, IP20 electronics Customer specific / IP 6K9K IP 30 (IP 44, with bracket and cover) Analog Outputs 0/4-20 mA, 0-10 V, Outputs/Relays, 2 outputs, Ethernet TCP/IP, Interface/Bus PP plastic, white
picture_as_pdf Thermal relay TR800WEB ZIEHL Thermal relay TR800WEB SEE IT T224164 On Order -- -- -- -- -- -- --
picture_as_pdf TR660IP-RS485 - Temperature... ZIEHL TR660IP-RS485 - Temperature Relay - T224371 SEE IT T224371 On Order AC/DC 24 - 270 V Glass fiber reinforced PBTP material IP54 motor, IP20 electronics Customer specific / IP 6K9K customer-specific Outputs/Relays, Ethernet TCP/IP, Interface/Bus Electronic protection against blocked rotor.
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Temperature relays protect dry-type transformers from overheating by monitoring the temperature of the winding and core using PTC thermistor sensors or Pt 100 (RTD) sensors. RTD (Resistance Temperature Detector) and PTC (Positive Temperature Coefficient) are two different types of thermistors used for temperature measurement, which differ in their properties and applications.

RTD:

It utilizes the change in resistance in a metal (e.g., platinum) depending on the temperature.
It exhibits a linear increase in resistance with increasing temperature.
They provide high accuracy and stability in temperature measurement.
They are often used in applications where high measurement accuracy is required, such as laboratories, pharmaceutical, and chemical industries.

PTC:

It uses a polymer thermistor with a positive temperature coefficient of resistance.
The resistance increases sharply with increasing temperature above a certain point known as the switching temperature.
They are used for protection against overheating as self-regulating elements.
Applications include surge protection, heating, and electrical control.