Current Protection Relays
Current protection relays are electronic relays that continuously measure the load current and change the position of the output contact when the current goes outside an adjustable upper or lower threshold and the delay time has elapsed. They are used to disconnect the contactor against overload and jamming in motors and against the low current caused by dry running in pumps. The category includes Entes AKC series overcurrent and undercurrent relays, Tense TRM digital thermal overload relays and KON-TER models with a built-in contactor; current setting ranges such as 1-25 A, 15-50 A and 190-300 A are examples. Choose the protection direction (overcurrent or undercurrent), the current setting range, direct or current transformer connection, the delay time and the operating mode (automatic, semi-automatic or manual) according to the motor's rated current and the application. Current protection relays are not designed to interrupt short-circuit current; they do not replace a fuse or circuit breaker.
Products
- Tense TRM-400 Digital Thermal Overload Relay, 290–400 A — Tense · SKU: TRM-400 · TRY 3,008.00 · In stock
- Tense TRM-50 Digital Thermal Overload Relay, 15–50 A — Tense · SKU: TRM-50 · TRY 1,598.00 · In stock
- Tense TRM-30M Digital Thermal Overload Relay, 0.5–30 A — Tense · SKU: TRM-30M · TRY 1,410.00 · In stock
- Tense TRM-12 Digital Thermal Overload Relay, 3–12 A — Tense · SKU: TRM-12 · TRY 1,109.20 · In stock
- Tense TRM-300 Digital Thermal Overload Relay, 190–300 A — Tense · SKU: TRM-300 · TRY 2,350.00 · In stock
- Tense TRM-30F Digital Thermal Overload Relay, 0.5–30 A — Tense · SKU: TRM-30F · TRY 1,598.00 · In stock
- Tense TRM-100 Digital Thermal Overload Relay, 40–100 A — Tense · SKU: TRM-100 · TRY 1,727.25 · In stock
- Tense TRM-200 Digital Thermal Overload Relay, 90–200 A — Tense · SKU: TRM-200 · TRY 2,220.75 · In stock
- Tense TRM-25 Digital Thermal Overload Relay, 1–25 A — Tense · SKU: TRM-25 · TRY 1,254.90 · In stock
- Schneider Electric RM35JA32MW Over or Under Current 0.3..1.5 A 1..5 A 3..15 A — Schneider Electric · SKU: RM35JA32MW · TRY 14,177.92 · Made to order
- Schneider Electric RM17JC00MW Overcurrent with Integrated Toroid, 2...20 A — Schneider Electric · SKU: RM17JC00MW · TRY 12,899.13 · Made to order
- Entes AKC-03A Current Protection Relay, Overcurrent, 230VAC — Entes · SKU: M1458 · TRY 1,394.40 · Made to order
- Entes AKC-01D Current Protection Relay, Undercurrent, 230VAC — Entes · SKU: M1457 · TRY 1,146.60 · Made to order
- Entes AKC-01A Current Protection Relay, Overcurrent, 230VAC — Entes · SKU: M1456 · TRY 1,037.40 · Made to order
- Entes AKC-03D Current Protection Relay, Undercurrent, 230VAC — Entes · SKU: M1459 · TRY 1,436.40 · In stock
- Tense DAKR-01D Undercurrent Control Relay, 1–10.000/5 A or 0.5–5 A direct — Tense · SKU: DAKR-01D · TRY 1,043.40 · In stock
- Tense KON-TER-18 Digital Contactor Thermal Overload Relay, 1–18 A — Tense · SKU: KON-TER-18 · TRY 2,632.00 · In stock
- Tense KON-TER-12 Digital Contactor Thermal Overload Relay, 1–12 A — Tense · SKU: KON-TER-12 · TRY 2,392.30 · In stock
- Tense KON-TER-25 Digital Contactor Thermal Overload Relay, 1–25 A — Tense · SKU: KON-TER-25 · TRY 3,181.90 · In stock
- Tense KON-TER-50 Digital Contactor Thermal Overload Relay, 25–50 A — Tense · SKU: KON-TER-50 · TRY 3,750.60 · In stock
How to choose Current Protection Relays
Current protection relays are electronic relays that continuously measure the load current and change the position of the output contact when the current goes outside an adjustable upper or lower threshold and the delay time has elapsed. They are used to disconnect the contactor against overload and jamming in motors and against the low current caused by dry running in pumps.
- Separate overcurrent/leakage protection, motor starting and local isolation requirements.
- Select rated current, pole count and breaking capacity (kA) from the installation calculation.
- Match coil voltage, auxiliary contacts and tripping curve to the control circuit and load type.
Frequently asked questions
What is Current Protection Relays and where is it used?
Current protection relays are electronic relays that continuously measure the load current and change the position of the output contact when the current goes outside an adjustable upper or lower threshold and the delay time has elapsed. They are used to disconnect the contactor against overload and jamming in motors and against the low current caused by dry running in pumps.
What should I compare when choosing Current Protection Relays?
Choose the protection direction (overcurrent or undercurrent), the current setting range, direct or current transformer connection, the delay time and the operating mode (automatic, semi-automatic or manual) according to the motor's rated current and the application.
Where can I find technical details for Current Protection Relays products?
Current protection relays are not designed to interrupt short-circuit current; they do not replace a fuse or circuit breaker.
Current Protection Relays Selection Guide: Technical Criteria & Application Standards