ABB EF45 Electronic Overload Relays

ABB EF45 Electronic Overload Relays Supplier,Exporter in India

ABB EF45 Electronic Overload Relay for Motor Protection

ABB EF45 is an electronic overload relay used for protecting three-phase motors against overload and phase failure. It is commonly used with ABB contactors in motor starters, MCC panels, pumps, compressors, conveyors and industrial machines.

The EF45 covers motor currents from 9 A to 45 A and is available in two adjustable ranges. Its electronic design gives a wider current setting range than a conventional thermal overload relay, while selectable trip classes allow the same relay family to be used for motors with different starting conditions.

The relay is self-powered from the motor current, so a separate auxiliary supply is not required for the overload protection function. Manual or automatic reset can be selected directly on the relay, and TEST, STOP and trip indication are provided for easier commissioning and maintenance.

For an ABB EF45 electronic overload relay supplier in India, EF45-30 motor protection relay, EF45-45 overload relay or ABB electronic overload relay export requirements, buyers can share the motor current, contactor model and quantity for quotation.

ABB EF45 Models

ABB EF45-30

ABB Order Code: 1SAX221001R1101

• Adjustable current range: 9–30 A
• Electronic motor overload protection
• Phase failure protection
• Selectable trip class
• Manual or automatic reset
• Suitable for industrial motor starter applications

EF45-30 is generally selected where the motor full-load current falls between 9 A and 30 A.

ABB EF45-45

ABB Order Code: 1SAX221001R1102

• Adjustable current range: 15–45 A
• Rated current up to 45 A
• Electronic overload and phase failure protection
• Selectable trip classes
• Direct mounting with compatible ABB contactors
• Suitable for larger motor starter applications within the EF45 range

The exact relay setting should always be matched to the motor nameplate current.

Technical Specifications

• Product family: ABB EF45
• Product type: Electronic overload relay
• Models: EF45-30 and EF45-45
• Overall current coverage: 9–45 A
• EF45-30 setting range: 9–30 A
• EF45-45 setting range: 15–45 A
• Number of poles: 3
• Rated operating voltage: Up to 690 V AC
• Frequency: 50/60 Hz
• Trip classes: 10E, 20E and 30E selectable
• Motor overload protection
• Phase failure sensitivity
• Self-powered operation
• Manual or automatic reset
• TEST function
• STOP function
• Trip indication
• Auxiliary contacts: 1 NC + 1 NO
• Operating temperature: -25°C to +70°C
• Direct mounting with compatible ABB contactors
• Separate mounting kit available

Features

• Wide adjustable current range
• Electronic motor overload protection
• Phase failure detection
• Selectable 10E, 20E and 30E trip classes
• No separate auxiliary supply required
• Manual and automatic reset options
• Front TEST and STOP controls
• Clear trip indication
• One trip contact and one signalling contact
• Temperature-compensated operation
• Compact mounting with ABB contactors
• Suitable for normal and heavier motor starting applications

ABB EF45 Trip Class 10E, 20E & 30E

ABB EF45 allows the trip class to be selected according to the starting characteristics of the motor.

Class 10E is commonly used for motors with normal starting times.

Class 20E or 30E can be considered where the motor requires a longer acceleration period or has a heavier starting load.

This flexibility makes EF45 suitable for different motor starter applications without needing a separate overload relay series for every starting condition.

Applications

ABB EF45 electronic overload relays are used in:

• MCC panels
• Motor starter panels
• Pump control panels
• Compressors
• Conveyor systems
• Fans and blowers
• HVAC equipment
• Machine tools
• Packaging machinery
• Material handling systems
• Process plants
• Water treatment plants
• Industrial pumps
• Manufacturing machinery
• OEM equipment
• Factory automation
• Direct-on-line starters
• Star-delta starters
• Industrial motor control systems

ABB EF45 for Motor Starter Panels

EF45 is commonly installed together with an ABB contactor to form a compact motor starter.

When the motor current stays above the selected overload setting for the permitted time, the EF45 trips and opens the contactor control circuit.

This helps protect the motor against sustained overload conditions and phase failure.

For new starter requirements, buyers should provide both the motor full-load current and contactor model so that the correct overload relay combination can be selected.

ABB EF45-30 vs EF45-45

The main difference between the two EF45 models is the adjustable current range.

EF45-30

• 9–30 A
• ABB code 1SAX221001R1101

EF45-45

• 15–45 A
• ABB code 1SAX221001R1102

Where the motor current falls inside the overlap between the two ranges, the final selection should consider the required setting and contactor combination.

Choosing the Correct ABB EF45 Relay

For an ABB EF45 quotation, provide:

• Motor rated current
• Required EF45 model, if known
• Existing ABB order code
• ABB contactor model
• Required trip class
• Quantity
• Destination country

For replacement requirements, a photograph of the existing overload relay and contactor can also help identify the correct unit.

Looking for ABB EF45 Electronic Overload Relays?

We supply ABB EF45 electronic overload relays for motor starters, MCC panels, pumps, compressors, industrial machinery, OEM projects and export requirements.

Enquiries are welcome for ABB EF45-30 9–30 A and EF45-45 15–45 A electronic overload relays.

For an ABB EF45 overload relay supplier and exporter from India, ABB EF45-30 supplier, EF45-45 motor protection relay or replacement electronic overload relay requirement, send the complete model, motor current, quantity and destination country for quotation.