Scribd
Upload
88 views3 pages

Motor Protection Schemes

The document discusses different types of motor and motor-transformer unit protection devices from Sepam. It describes protections for internal motor faults, power supply faults, load faults, and temperature monitoring. Specific protection devices are listed that provide protection without and with voltage monitoring, as well as motor differential protection, motor-transformer unit protection, and motor-transformer unit differential protection. Various protection elements like 50G/51G for earth faults are also indicated.

Uploaded by

陆华林
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
88 views3 pages

Motor Protection Schemes

The document discusses different types of motor and motor-transformer unit protection devices from Sepam. It describes protections for internal motor faults, power supply faults, load faults, and temperature monitoring. Specific protection devices are listed that provide protection without and with voltage monitoring, as well as motor differential protection, motor-transformer unit protection, and motor-transformer unit differential protection. Various protection elements like 50G/51G for earth faults are also indicated.

Uploaded by

陆华林
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 3

Motor applications

Motor protection
b internal motor fault protection
b power supply fault protection
b driven load fault protection
b RTD temperature monitoring (ANSI 38/49T).
Motor protection without voltage monitoring: Sepam M20
b direct starting. b auto-transformer b two-way.
starting.

DE88050

DE88051

DE88052
Motor protection with voltage monitoring: Sepam M40, M41, M61 or M81
b direct starting. b auto-transformer b two-way.
starting.
DE60545

DE60546

DE60547

Motor differential protection: Sepam M87


Motor differential protection: 87M. Phase protection by self-
balancing-differential
scheme: 50/51.
b direct starting. b auto-transformer b direct starting.
starting.
DE88056

DE88057

DE88058
Motor applications

Motor-transformer unit protection


b motor and transformer protection against internal faults
b power supply fault protection
b driven load fault protection
b internal transformer protection: Thermostat / Buchholz (ANSI 26/63)
b RTD temperature monitoring (ANSI 38/49T).

Motor-transformer unit protection without voltage monitoring: Sepam M20


b transformer primary earth fault protection: 50G/51G.
Note: monitoring of motor insulation must be ensured by another device.

DE88059

Motor-transformer unit protection with voltage and transformer monitoring:


Sepam M40, M41, M61 or M81
b motor earth fault protection: 59N
b transformer primary earth fault protection: 50G/51G.
b transformer monitoring: Buchholz, thermostat, temperature measurement.
DE60549

Motor-transformer unit protection with voltage and transformer monitoring:


Sepam M81
b motor earth fault protection: 50G/51G
b transformer primary earth fault protection: 50G/51G
b transformer monitoring: Buchholz, thermostat, temperature measurement.
DE88062
Motor applications

Motor-transformer unit differential protection: Sepam M88


Motor-transformer unit differential protection: 87T.
b motor earth fault protection: 50G/51G b motor earth fault protection: 59N
b transformer primary earth fault b transformer primary earth fault
protection: 50G/51G. protection: 50G/51G.

DE88063

DE88064

You might also like