Protection Relays

Protection relays on Voltkart: 34 phase, voltage, current and pump protection relays from Minilec, Selec, EAPL and Teknika, from ₹550 including GST. Use the tables below to pick the relay for the fault you need to catch.

Protection relays guard three-phase motors, pumps and panels from single phasing, voltage swings, phase reversal and overload. Typical uses are borewell and pump starters, compressors, conveyors and machine panels. Prices checked 8 October 2026. Reviewed by Amit, Voltkart.

Which protection relay for what (live prices)

Phase sequence and phase failure relays

Stop a three-phase motor from starting or running in reverse, or on a missing phase.

Model	Protects against	Price (incl. GST)
Selec 800PSR	Phase sequence	₹550
Selec 600PSR-CE	Phase failure, sequence, asymmetry; 17.5 mm	₹870
Selec 642PSR	Phase failure, sequence, asymmetry; 17.5 mm	₹985
Minilec S1 VMR 7	Phase sequence, instant trip	₹1,020
EAPL PMD-02	Phase failure, sequence, under-voltage; self-powered	₹1,190
EAPL PMD-01	Adds phase unbalance; self-powered	₹1,550

Three-phase voltage protection relays

Trip on under or over voltage (and usually phase loss and sequence) on a 415 V supply.

Model	Protects against	Price (incl. GST)
Selec 800VPR-3	Under/over voltage, phase failure, sequence	₹850
Selec VPRA2M-CE	Analog; 1Ø or 3Ø; asymmetry; 2 C/O	₹1,150
Teknika TE-210	Under voltage	₹1,275
Selec 600VPR-310/520-CE	Under/over voltage, phase failure, sequence	₹1,275
Selec VPRD2M-BL-CE	Digital; voltage, phase, frequency	₹1,500
Selec 900VPR-2	Digital; voltage, phase, frequency	₹1,610
Teknika TE-240	Under + over voltage	₹1,712
Minilec S2 VMR 3	Sequence, adjustable unbalance and U/O voltage	₹2,019
Minilec ALV D2	Adjustable under/over voltage, fixed unbalance	₹2,510
Minilec D2 VCT 1	Under/over voltage, ph-ph or ph-N trip points	₹3,080

Single-phase voltage relays

For 230 V single-phase loads.

Model	Protects against	Price (incl. GST)
Selec 600VPR-1-130/320-CE	Under/over voltage, 130–320 V	₹1,000
Teknika TE-200	Under voltage, 160–260 V	₹1,275

Single phasing preventers for pumps

Protect submersible, monoblock and borewell pump motors from single phasing and reverse phase.

Model	Protects against	Price (incl. GST)
Minilec VSP 2	Reverse phasing, unbalance; any HP	₹830
Minilec VSP D1	Fixed unbalance, auto reset	₹1,185
Minilec VPG D1	Phase failure plus low water level guard	₹1,530
Minilec VSP D2	Adjustable unbalance, selectable reset	₹1,688

Current and motor protection relays

Watch motor current or winding temperature, not just the supply.

Model	Protects against	Price (incl. GST)
Teknika TE-510	Over current, single phase	₹1,520
Selec 900CPR-3	Under/over current, current asymmetry	₹1,680
Minilec S2 WTR1	Winding temperature (PTC thermistor)	₹2,000
Minilec MPR D2	Phase failure, sequence, unbalance and overload (needs S2 CTS sensor)	₹2,600
Teknika TE-530	Over current, 3 phase	₹3,026

Pump and generator control

Model	Protects against	Price (incl. GST)
Teknika TE-150	DG set auto engine start, 3 cranking attempts	₹1,120
Teknika TE-1120	Toggler (changeover) relay for pumps	₹1,330
Minilec S2 ALT 1	Alternates two pumps each cycle	₹1,690

Current sensors for the Minilec MPR D2: S2 CTS 1/5, S2 CTS 1/10, S2 CTS 1/20, S2 CTS 1/40 (₹866 each), sized by motor HP.

How to choose

Fault to catch: phase failure or sequence, under/over voltage, unbalance, over current, or motor winding temperature.
Supply: 230 V single phase or 415 V three phase, with or without neutral.
Reset and settings: auto or manual reset, fixed or adjustable trip points and time delay.
Mounting: most of these mount on 35 mm DIN rail; 17.5 mm relays save panel space.

Voltkart is an authorised distributor of Minilec, Selec and EAPL: see the Minilec, Selec and EAPL distributor pages. Teknika relays are supplied as a dealer (Teknika page). Related: overload relays, contactors, level controllers.

Frequently asked questions

What is the difference between a phase sequence relay and a voltage protection relay?

A phase sequence relay only checks that the three phases are present and in the right order (R-Y-B), so a motor never runs in reverse. A voltage protection relay also trips when the voltage goes too low or too high, which protects motors from overheating on a weak or surging supply.

Which relay should I use for a borewell or submersible pump?

A single phasing preventer such as the Minilec VSP 2 or VSP D1 is the usual choice for a three-phase pump starter. If the pump can run dry, the Minilec VPG D1 adds a low water level input.

Do I still need an overload relay with a protection relay?

Yes. Most voltage and phase relays do not measure motor current. Keep the thermal overload relay or MPCB in the starter, or use a current-sensing relay such as the Minilec MPR D2.

How is a protection relay wired?

The relay monitors the incoming phases and its output contact is wired in series with the contactor coil. When a fault is detected the contact opens and the contactor drops out, stopping the motor.

Not sure which model you need? Send the motor details or the part number on WhatsApp at 8800754881 (Mon–Sat, 12:30–7 pm). GST invoice on every order, delivery across India.