6RA20 CT Shorting Relay

Numeric High Impedance Differential Protection Relays with integral Current Transformer (CT) monitoring can be set to detect CT circuit failure i.e. open circuit in the CT Buswires, Switching Contacts or the CT itself. If failure is detected then a 'Pole X CT Failure Alarm' output will be given, this can be used to energise a CT buswire shorting relay.

The type 6RA206B has a single hand element which enables shorting of all three poles via separate, heavy duty, latching contacts across the buswires of each pole, also provides three latching Common Alarm contacts.

The type 6RA206D has three separate single-pole hand reset elements which enable shorting of the faulty pole via separate heavy-duty latching-contacts across the buswires of the faulty pole leaving the other healthy poles in-service. One additional latching Alarm contact is provided per pole.

The type 6RA207B has a single element electrically reset element which enables shorting of all three poles via separate, heavy duty, 6 N/O & 3 N/C latching contacts + 1 N/O latching alarm contact.

Features

• Modular packaging
• Rack or flush mounting
• Draw out module
• M4 screw terminals
• Wide range of operating coils available
• High isolation across open contacts
• High make and carry rating
• Custom labeling available
• High visibility electro-mechanical flag indication
• Rugged modular construction
• Draw out case
• Made in Australia