Relays

Directional and Non-Directional Overcurrent and Earth Fault Relay

Directional/ Non Directional O/C & E/F Relay

System Voltage up to 33kV

Voltech's Overcurrent and Earth Fault (O/C & E/F) Relay, available in directional and non-directional types up to 33kV, detects faults and trips circuit breakers to protect feeders, transformers, and motors. This protection relay is essential for utilities and industrial plants needing reliable fault detection in medium-voltage networks.

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Motor Protection Relay for industrial electrical systems

Motor Protection Relay

System Voltage | up to 33kV

The Voltech Motor Protection Relay, rated up to 33kV, safeguards electric motors from overload, phase failure, earth fault, and stalling conditions. This motor protection relay extends motor life and prevents costly downtime, making it essential for industrial plants, pumping stations, and process industries with critical motors.

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Tripping Relay used in switchgear protection systems

Tripping Relay

System Voltage | up to 33kV

Voltech's Tripping Relay, rated up to 33kV, instantly initiates circuit breaker tripping upon receiving a fault signal from protection relays, ensuring fast fault isolation. This tripping relay is a critical link in substation protection schemes, helping utilities and industries minimize equipment damage during electrical faults.

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Auxiliary Relay for control and automation applications

Auxiliary Relay

System Voltage | up to 33kV

The Voltech Auxiliary Relay, rated up to 33kV, provides signal multiplication, isolation, and interlocking functions within control and protection circuits. This auxiliary relay supports reliable automation and signaling in substation control panels, helping utilities and industrial plants achieve dependable, coordinated protection system operation.

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Trip Circuit Supervision Relay for protection monitoring

Trip Circuit Supervision Relay

System Voltage | up to 33kV

Voltech's Trip Circuit Supervision Relay, rated up to 33kV, continuously monitors the health of circuit breaker trip coils and wiring, alerting operators to faults before they cause a protection failure. This trip circuit supervision relay improves substation reliability by ensuring breakers will trip when needed most.

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Frequently Asked Questions

An O/C & E/F relay detects abnormal current or earth fault conditions and trips the circuit breaker to isolate the fault. Voltech's directional and non-directional O/C & E/F relays are rated for systems up to 33kV.
A motor protection relay monitors for overload, phase failure, earth fault, and stalling conditions, tripping the motor circuit before damage occurs. Voltech's motor protection relay, rated up to 33kV, helps extend motor life and reduce unplanned downtime.
A tripping relay receives the trip signal from protection relays and instantly operates the circuit breaker's trip coil to isolate a fault. Voltech's tripping relay, rated up to 33kV, is a critical link in fast, reliable fault clearance.
Trip circuit supervision continuously checks that a circuit breaker's trip coil and wiring are healthy, alerting operators to faults before an actual trip is needed — preventing a protection failure when it matters most. Voltech's relay covers systems up to 33kV.
An auxiliary relay provides signal multiplication, electrical isolation, and interlocking between control and protection circuits, supporting safe and coordinated substation automation. Voltech's auxiliary relay is rated for systems up to 33kV.
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