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Showing Results For: Motor Protection

Motor Protection

Motor protection prevents damage to an electrical motor by reducing the incidence of problems, including internal faults and abnormal conditions. It is crucial to protect the circuits against overloads and fault currents. The size of the motor and the required voltage level will determine the type of motor protection. In addition, any untended motor should be protected against over and under-voltage, over-temperature, and fault currents.

Motor Protection Functions:

There are several protection features for motor protection schemes to consider:

  • Motor protection devices are ideal for protecting against various types of damage that can occur within a motor, including faults arising from excess torque or vibration. 
  • Motor protection units also overcome other mechanical limitations, such as:
  • Startup frequency management
  • Control operating features like the voltage, phases, and short-circuit.
  • They also overcome the limitations, including:
  • Rating and type of motor horsepower 
  • Nature of the process
  • Motor environment and the associated switching device
  • Hot/Cold permissible locked-rotor time, permissible accelerating time.
  • Time versus current curve (when starting the motor).

Motor Protection Devices:

Circuit protection is carried out through devices for timely disconnection of electric motors from the network in alterations to the regular work regime. This is crucial for preventing motor insulation, windings, and electrical connection deterioration. The most used devices include:

Fuses:

The fuse is the simplest form of circuit protection, consisting of a fuse element designed to prevent or melt further current flow. Fuse is highly recommended in transformers and backup protection for other protective devices. For instance, in motors, a double element fuse is ideal for providing a range of protection, including an overload range. Time delay fuses are the most valuable fuses for motor branch circuit applications. This fuse can be sized closer to the motor's full-load current, providing a degree of overload protection, better short circuit protection, and the possible use of a more miniature disconnect switch.

Circuit Breakers:

A circuit breaker is a simple electromechanical device for an individual Electric Motor that provides protection against overload, changes in input current, or unintended interruptions to the primary circuit. The correct type of circuit breaker should be used for electric motor protection. 

Overload relays:

Overload relays avoid excessive heat from the overcurrent condition and protect the motor, motor branch circuit, and other components. These relays are part of the motor starter that protects the motor by monitoring the current flow in the circuit.

Typical applications of motor protection:

Motor protection is ideal for managing and protecting synchronous and asynchronous motors. They are also suitable for 

Benefits and Features:

  • They prevent damage to electrical motors.
  • Protect the grid from spreading disturbances.
  • The application-specific standard configuration reduces the time needed to set up and commission relays.
  • They also provide pre-configured systems for industrial and utility distribution applications.

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Legrand
Rohs Verified
417304, Legrand
86 In Stock
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1 +
£ 99.35
Legrand
Rohs Verified
417334, Legrand
87 In Stock
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1 +
£ 196.70
Legrand
Rohs Verified
417302, Legrand
85 In Stock
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1 +
£ 102.32
Telemecanique Sensors
GV2L20, Telemecanique Sensors
2 In Stock
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1 +
£ 92.35
10 +
£ 86.82
15 +
£ 83.12
Rockwell Automation
Rohs Verified
140MT-D9T-B10, Rockwell Automation
7 In Stock
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1 +
£ 84.26
Rockwell Automation
Rohs Verified
140MT-D9V-C29, Rockwell Automation
24 In Stock
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1 +
£ 148.96
Rockwell Automation
Rohs Verified
140MT-D9E-C16, Rockwell Automation
79 In Stock
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1 +
£ 102.92
Rockwell Automation
Rohs Verified
140MT-D9N-B10, Rockwell Automation
90 In Stock
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1 +
£ 74.93
Rockwell Automation
Rohs Verified
140MT-D9N-C10, Rockwell Automation
95 In Stock
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1 +
£ 88.48
Rockwell Automation
Rohs Verified
140MT-D9T-A16, Rockwell Automation
103 In Stock
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1 +
£ 73.13
132592 PKZM4-25-CB, Eaton
11 In Stock
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1 +
£ 311.13
Rohs Verified
286082 PKZM01-1-G, Eaton
2 In Stock
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1 +
£ 92.99
Rohs Verified
286084 PKZM01-2,5-G, Eaton
2 In Stock
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1 +
£ 98.65
Rockwell Automation
Rohs Verified
140MT-C3E-A16, Rockwell Automation
99 In Stock
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1 +
£ 60.70
Rockwell Automation
Rohs Verified
140MT-D9E-B10, Rockwell Automation
73 In Stock
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1 +
£ 84.26
Rockwell Automation
Rohs Verified
140MT-D9E-C20, Rockwell Automation
80 In Stock
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1 +
£ 107.14
Rockwell Automation
Rohs Verified
140MT-D9N-A16, Rockwell Automation
86 In Stock
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1 +
£ 67.41
Rockwell Automation
Rohs Verified
140MT-D9T-B25, Rockwell Automation
9 In Stock
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1 +
£ 89.98
Rockwell Automation
Rohs Verified
140MT-D9T-C10, Rockwell Automation
12 In Stock
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1 +
£ 96.00
Rockwell Automation
Rohs Verified
140MT-D9V-C20, Rockwell Automation
22 In Stock
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1 +
£ 112.86
Rockwell Automation
Rohs Verified
140MT-C3E-C20, Rockwell Automation
10 In Stock
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1 +
£ 86.97
Rockwell Automation
Rohs Verified
140MT-C3E-C32, Rockwell Automation
13 In Stock
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1 +
£ 108.27
Rockwell Automation
Rohs Verified
140MT-D9E-C29, Rockwell Automation
82 In Stock
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1 +
£ 141.15
Rockwell Automation
Rohs Verified
140MT-D9E-C32, Rockwell Automation
83 In Stock
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1 +
£ 141.15
Rockwell Automation
Rohs Verified
140MT-D9N-C20, Rockwell Automation
97 In Stock
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1 +
£ 109.25
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New Items
New items
199199PKZM0-12-SPI32, Eaton

199199PKZM0-12-SPI32, Eaton

199199 The Eaton Motor-protective circuit-breaker from PKZM0 range has current rating of 12 A. It uses Thermomagnetic switching technique. It has Feed-side screw terminals or output-side push-in terminals connection. With degree of protection of IP20, this device is also suitable for motors with efficiency class IE3. The design is finger and back-of-hand proof for protection against direct contact when it is actuated from front and made for use with Motor starter combinations type MSC. It has operating ambient temperature range of -25°C to 55°C. The device is rated for maximum uninterrupted current of 12 A The device has IP20 degree of protection It is rated for frequency range of 40 to 60 Hz
New items
199192PKZM0-0,63-SPI32, Eaton

199192PKZM0-0,63-SPI32, Eaton

199192 The Eaton Motor-protective circuit-breaker from PKZM0 range is rated for 0.12 kW, and has current rating of 0.63 A. It uses Thermomagnetic switching technique. It has Feed-side screw terminals or output-side push-in terminals connection. With degree of protection of IP20, this device is also suitable for motors with efficiency class IE3. The design is finger and back-of-hand proof for protection against direct contact when it is actuated from front. It has operating ambient temperature range of -25°C to 55°C. The device is rated for maximum uninterrupted current of 0.63 A The device has IP20 degree of protection It is rated for frequency range of 40 to 60 Hz
New items
222353  PKZM4-32, Eaton

222353 PKZM4-32, Eaton

Eaton Motor Protection Circuit Breaker - PKZM4 Series Features and Benefits What is a motor protection circuit breaker?
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199159PKZM0-16-PI, Eaton

199159PKZM0-16-PI, Eaton

199159 The Eaton Motor-protective circuit-breaker from PKZM0 range has current rating of 12 A. It uses Thermomagnetic switching technique. It has push-in terminals connection. With degree of protection of IP20, this device is also suitable for motors with efficiency class IE3. The design is finger and back-of-hand proof for protection against direct contact when it is actuated from front and for use with Motor-starter combinations type MSC. It has operating ambient temperature range of -25°C to 55°C. The device is rated for maximum uninterrupted current of 12 A The device has IP20 degree of protection It is rated for frequency range of 40 to 60 Hz
New items
082881, Eaton

082881, Eaton

The Eaton 3 pole current limiter has 63 amp current rating. Operating temperature range is from -25°C to 55°C III overvoltage category Pollution degree 3
New items
088912  PKZM0-1,6-T, Eaton

088912 PKZM0-1,6-T, Eaton

The Eaton 3 pole transformer protective circuit breaker has 1 to 1.6 amp current rating. Also suitable for motors with efficiency class IE3. III overvoltage category Pollution degree 3 Operating temperature range is from -25°C to 55°C
New items
199176PKZM0-25-T-PI, Eaton

199176PKZM0-25-T-PI, Eaton

199176 The Eaton Transformer-protective circuit-breaker from PKZM0 range has current rating of 25 A. It has push-in terminals connection. With degree of protection of IP20, this device is also suitable for motors with efficiency class IE3. The design is finger and back-of-hand proof for protection against direct contact when it is actuated from front. It has operating ambient temperature range of -25°C to 55°C. The device is rated for maximum uninterrupted current of 25 A The device has IP20 degree of protection It is rated for frequency range of 40 to 60 Hz
New items
072730  PKZM0-0,16, Eaton

072730 PKZM0-0,16, Eaton

Eaton Motor Protection Circuit Breaker - PKZM0 Series Features & Benefits 492-1709 492-1715 244-0113 How do I select the right Motor Protection Circuit Breaker?
New items
265342  PKZM0-16/AK, Eaton

265342 PKZM0-16/AK, Eaton

Manual Motor Protector The professional XT series of manual motor protectors from Eaton feature a push-button or rotary ON/OFF manual disconnect, class 10 adjustable bi-metallic overload relay and fixed magnetic short circuit trip capability in one compact unit. Features: Rated Operational Current Up to 25 A Switching Capacity 50 kA/415 V Short Circuit Release, Fixed Setting to 14 ´ I Overload Release, Adjustable 0.6 — 1 ´ I Single-Phasing Sensitive
New items
278483  PKZM01-6,3, Eaton

278483 PKZM01-6,3, Eaton

Eaton Motor Protective Circuit Breaker - PKZM0 Features & Benefits How do I select the right Motor Protection Circuit Breaker?
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229676, Eaton

229676, Eaton

The Eaton 3 pole motor protective circuit breaker has 2.5 to 4 amp current rating. It is suitable for motors with efficiency class IE3. IP20 protection class III overvoltage category Pollution degree 3
New items
1SAM150000R1012 MS325-16, ABB

1SAM150000R1012 MS325-16, ABB

The ABB MS series manual motor starter is a 54 mm width devices with a rated operational current of 16 A. This device is used to manually switch on and off motors and to protect them reliably and without the need for a fuse from short-circuits, overload and phase failures. The manual motor starter is suitable for three- and single-phase applications. Build-in disconnect function Temperature compensation Trip-free mechanism Rotary handle with a clear switch position indication
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Motor Protection and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Motor Protection or any other product.
This depends on the Motor Protection individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Motor Protection and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Motor Protection.
Yes. We keep updating our stock frequently and if a product like Motor Protection is not in stock then we will let you know.