ENTES Protection and Control Relays for Automation Panels

Supply of ENTES relays and devices (Istanbul) for control cabinets: time, phase, voltage, current and level relays, timers, power supplies and transformers.

We select by the nameplate designation, supply, wiring diagram and mounting type. Relays and replacement components go into a single request.

MCB-7 time relay

MCB-7 is a slim DIN-rail digital time relay with on-delay and off-delay functions. In your request give the supply voltage, the time range and the wiring diagram from the nameplate.

  • Time range from 0.1 s to 30 h
  • Supply 24–240 V AC/DC
  • Functions: on-delay (ER) and off-delay (EM)
  • Output: 1 changeover contact, 8 A, 2000 VA

MCB time relay range

Neighbouring models differ in time range, supply and set of modes. Check the full designation, not just the MCB series.

  • MCB-30: 2–30 s, MCB-60: 1–60 s, supply 24–240 V AC/DC
  • MCB-8: 0.1 s – 999 min; MCB-9: 0.5 s – 30 h, supply 12–240 V AC/DC
  • MCB-15 and MCB-20: 0.1 s – 100 h, symmetric flasher, trigger input
  • MCB-25 with LCD: 0.1 s – 999 h; MCB-20-2C has two contacts

Multifunction relays MCB-100…131, MCB-200, ERTC

Relays with a trigger input and several modes. The last digit of the designation sets the supply, so it must not be lost when ordering.

  • MCB-100, 120, 125, 130, ERTC-100: 85–315 V AC/DC; MCB-101, 121, 126, 131, ERTC-101: 10–30 V
  • MCB-120/121: on-delay, off-delay, impulse, asymmetric flasher
  • MCB-125/126 add start-stop and counter; MCB-130/131 add star-delta and left-right
  • MCB-200: trigger-controlled modes, internal battery, 8 A contact

Relays for standard circuits: SER-YU, SSR-2X, DG, EF-10, ERB-50

Purpose-built relays for star-delta motor starting, reversing, hold-up after power loss, flashing cycles and washing.

  • SER-YU: star-delta, 20–500 ms and 1–60 s, two 5 A N/O contacts
  • SSR-2X: left-right, 0.1 s – 60 h, two 10 A N/O contacts, 230 V AC supply
  • DG-10 (0.6 s – 10 min) and DG-60 (1 s – 60 min): delay after power loss, 16 A contact
  • EF-10: flasher 1–10 s; ERB-50: washing cycle; ERTC-01-DIN: 1 s – 100 h

DTR astronomic time relays

DTR relays switch a load by time of day or by sunrise and sunset for set coordinates. For replacement, the model, the number of outputs and the communication option matter.

  • DTR-10 and DTR-10T: 15 programs; DTR-20, 20S, 20TS and DTR-25: 32 programs
  • One relay output on DTR-10T and DTR-20TS, two on DTR-10, 20, 20S, 25
  • Replaceable battery on DTR-10, 10T, 20, 20S, 20TS; holiday lock on the DTR-20 series
  • RS-485 interface on DTR-20S and DTR-20TS

Timers MCB-A, MCB-50 and FG photocell relays

Daily and weekly timers run lighting and equipment on a schedule; photocell relays switch a load in the dark. State the load and the number of channels.

  • MCB-A: analog daily timer, 15 min step, 100 h power reserve
  • MCB-50 (two outputs) and MCB-50T (one): digital, 32 programs, 1 s step
  • FG-4: 1–3 lux, 8 A contact; FG-4A and FG-4R: 1–10 lux, 5 A; FG-4T: triac 8 A, 400 VA
  • The FG-GÖZ light sensor is a separate item

Phase failure relays MK, MKC and MKS

These relays protect motors from phase loss and unbalance; some models also monitor phase sequence and a PTC sensor. State the mains, DIN1 or DIN2 mounting and the contact type.

  • MK-01, MKC-01, MKS-01: phase failure, 220–230 V, 20 % asymmetry; MKS-01 has an N/O contact
  • MKC-03 and MKS-03: plus phase sequence, 40 % asymmetry; MKC-03P adds a PTC input
  • MKC-05/05P (230 V) and MKC-06/06P (400 V): adjustable delays, 5–15 % asymmetry
  • MKC-04: 380–400 V; MKC-04-U69: 160–690 V, 10 % asymmetry; MKC-30: 5–25 %, off-delay

FR-02, PT-01 thermistor relay and SPD surge protection

FR-02 checks phase order, PT-01 trips a motor with PTC sensors when the winding overheats, SPD units absorb voltage surges.

  • FR-02: R-S-T phase order check; for compressors, elevators and machines dangerous in reverse
  • PT-01: three trip temperatures — 110, 120 and 130 °C
  • SPD-D is delta-connected, SPD-S is star-connected

GKRC voltage monitoring relays

GKRC relays drop the load when voltage leaves the tolerance, or on phase loss and unbalance. The PRO series adds neutral and frequency monitoring.

  • GKRC-01, 02, 02F, M2, 30F: 150–300 V at 230 V; GKRC-02FA: 190–260 V
  • GKRC-03 and 03F: 270–510 V at 400 V, no neutral; 'F' adds phase loss and sequence
  • GKRC PRO-21E and 22E: 85–300 V, neutral loss, frequency, voltage unbalance
  • 8 A contact: one changeover (PRO-22E has two); MCC-1D: N/O, 160–260 V

AKC current relays, CKR-93T protection relay and ELR earth leakage relays

AKC relays monitor load current, CKR-93T protects against short circuits and earth faults, ELR relays watch leakage current together with CBCT toroidal transformers.

  • AKC-01A and 03A — overcurrent, AKC-01D and 03D — undercurrent; 8 A contact
  • AKC-01 works with an X/5 A transformer, AKC-03 only with CT-25 (60 A)
  • CKR-93T: 3 phases plus earth, definite and inverse time, supply 24 V DC or 85–265 V
  • ELR-30-M/A: leakage 0.3–30 A, 0–10 s; CBCT: toroids 38–210 mm and rectangular 350×150 mm

SSRC liquid level relays, PGS-108 socket and LLS electrodes

SSRC relays monitor the level of conductive liquid in a tank or well and drive the pump, protecting against dry running and overflow. Electrodes and socket are separate items.

  • SSRC-04: DIN rail, sensitivity 5–50 kΩ, one 8 A changeover contact
  • SSRC-04P: mounts in the 8-pin PGS-108 socket, sensitivity 5–100 kΩ
  • Electrodes LLS-01 (small) and LLS-02 (large), 100 pcs per carton
  • Do not use two SSRC-04P in one tank: they disturb each other

PS power supplies, ENT.PST and ENT.IST transformers

PS units give 12 or 24 V DC, ENT.PST transformers step down to 24 V AC for control circuits, ENT.IST isolation transformers separate circuits galvanically.

  • PS-242 (24 W), PS-361 (12 V, 36 W), PS-362 (24 V, 36 W), PS-722 (72 W), PS-1202 (120 W, 5 A)
  • Input 85–265 V AC or 110–350 V DC; overload, thermal and output short-circuit protection
  • ENT.PST: 230/24, 400/24 and 400-230/24 V, 25–630 VA; ENT.IST 230/230 and 400/230 V up to 630 VA
  • ENT.IST 800/400 V: 2500–20 000 VA, weight 28.8–143 kg

Selection by Designation, Supply and Wiring

Engineers check the full designation (MKC-05P, GKRC-02FA, DTR-20S, SSRC-04P), supply voltage, number of outputs and mounting type, DIN1 or DIN2. For time relays we confirm the function and range, for monitoring relays the 230 or 400 V mains and permitted asymmetry, for current relays the X/5 A or CT-25 transformer. If the marking has worn off, selection works from photos of the terminals and the wiring diagram.

Equipping a Control Panel

For one motor, an MKC relay watches phase loss, PT-01 winding overheating through PTC, AKC overcurrent and FR-02 phase order. Control circuits are fed by PS power supplies and ENT.PST transformers, ENT.IST provides isolation and SPD units absorb voltage surges. All of it can be ordered in one shipment.

The Manufacturer ENTES Elektronik

ENTES Elektronik Cihazlar İmalat ve Ticaret A.Ş. has operated since 1980 with its head office in the Ümraniye district of Istanbul. According to the manufacturer it employs more than 350 people, sells to 107 countries and runs 12,000 m² of production floor. Protection and control is one product area next to measurement, compensation and current transformers.

Typical Applications

SSRC level relays serve pumping stations and water treatment, FR-02 protects compressors and elevators from reverse rotation, DTR and FG photocell relays switch lighting by schedule and by daylight, DG relays run fans and motor braking, MCB relays run process cycles.

Supply Terms and Limits

Sourcing runs through China, Europe, the USA and Japan with delivery to your warehouse. Payment follows an invoice; price and lead time are set at quotation by model designation. We do not confirm official ENTES dealer status, EAC certificates or a spare parts catalogue with part numbers.

Documentation and sources

Industrial equipment

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