MOTOR PROTECTION & CONTROL DEVICES

AUTO SWITCH

LECS Auto Switch is designed to monitor the sequence of three phase system. It protects single phasing, reverse sequence and voltage unbalance. It operates in Auto/Manual mode. It is widely used in agricultural starter panels.

Features:

• Single Phasing Prevention
• Reverse Sequence Protection
• Unbalance Protection
• Power ON Delay
• Auto / Manual Mode
• LED trip indication

Application:

• Star Delta starter panels
• Air compressors
• All rotating machines
• AMF panels
• LT power distribution panels

Ordering Code:

• Auto Switch for motors - ASM
• Auto Switch for Compressors - ASC

Auto Switch Technical Specification

PHASE PROTECTION RELAY

LECS Phase Protection Relay is designed to monitor the sequence of three phase system. It protects single phasing, reverse sequence and also monitors voltage unbalance condition. It is widely used in portable electrical equipments.

Features:

• Single phasing prevention
• Reverse sequence protection
• Unbalance protection
• Microcontroller based
• Power on delay

Application:

• Air compressors
• AMF panels
• LT power distribution panels
• All rotating machines

Phase Protection Relay Technical Specification

ELECTRONIC TIMER

LECS Electronic timer operates with universal supply voltage. It is best suitable for small range time-delayed operations in electrical panels and machines. It is available in two ranges - ON delay and Cyclic.

Features:

• ON Delay Operation
• Cyclic Operation
• Universal Supply voltage – AC or DC, 24 V to 230 V
• Micro controller based
• Sleek Design

Application:

• Factory automation
• Process control
• AMF panels
• Printing, Processing and moulding machines
• Special purpose machines
• Electrical panels

Ordering Code:

• ON Delay Timer - ETR-1-OD
• Cyclic Timer - ETR-2-CY

Electronic Timer Technical Specification

THERMISTOR PROTECTION RELAY

LECS Thermistor Protection Relay prevents the excess heat produced in motors by tripping its control circuit. If the motor winding temperature exceeds the specification of the thermistor embedded in the winding, TPR senses and switch OFF the motor through contactor.

Features:

• Open sensor circuit protection.
• Short sensor circuit protection.
• Manual Reset.
• Test switch to simulate the fault condition.
• Protects up to 4 motors.

Ordering Code:

• Single Channel - TPR-1C
• Four channel - TPR-4C
• Four channel DC - TPR-L-4C

Thermistor Protection Relay Technical Specification

VOLTAGE MONITORING RELAY:

LECS Voltage Monitoring relay continuously monitors the supply voltage. If the supply voltage deviates from the set value for the period of trip time the VMR relay output contact changes over and the corresponding fault indication LED glows.

Features:

• Over Voltage Protection
• Under Voltage Protection
• Phase Failure Protection
• Reverse Sequence Protection
• Selectable Trip Time
• Selectable AUTO / MANUAL activation of load
• Reset Switch for Manual activation of load
• Separate Indications for POWER, AUTO, MANUAL, OV, UV, PF, and RS.

Features:

• AMF panels
• Compressors control panels
• Induction heater control panels
• LT power distribution panels
• Motor protection

Voltage Monitoring Relay Technical Specification