ABB RET670 Transformer Protection Relay Module in Stock

The RET670 offers comprehensive protection, monitoring, and control features for various types of transformers, including:

• Two- and three-winding transformers
• Autotransformers
• Step-up transformers
• Generator-transformer block units
• Phase shifting transformers
• Special railway transformers
• Shunt reactors

Current Transformer Information:

1. CT Ratio 1:

   • Ratio: 2000/5 A
   • CT Class: C800 (At max tap of 2000/5A)
   • Secondary Resistance: 0.5 Ohm (2000/5A tap)
   • Cable Loop Resistance: <2 Ohms
   • Max Fault Current: Equal to switchgear rated fault current 40 kA

2. CT Ratio 2:

   • Ratio: 1200/5 A
   • CT Class: C800 (At max tap of 1200/5)
   • Secondary Resistance: 0.3 Ohms
   • Cable Loop Resistance: <0.1 Ohms
   • Max Fault Current: Use 15 x Irated for power transformer.

3. CT Ratio 3:

   • Ratio: 2000/5 A
   • CT Class: C400 (At max tap of 2000/5)
   • Secondary Resistance: 0.5 Ohms (At 2000/5 Tap)

4. CT Ratio 4:

   • Ratio: 100/5 A
   • CT Class: C200
   • Secondary Resistance: 0.1 Ohms (At 100/5 Tap)
   • Cable Loop Resistance: <0.1 Ohms

5. CT Ratio 5:

   • Ratio: 600-300/5 A
   • CT Class: C200
   • Secondary Resistance: 0.66 ohms
   • Cable Loop Resistance: <0.1 Ohms