| REL670 A21, Ver. 2.1 | Article: REL670 A21, Ver. 2.1 Line distance protection , Isolated or high impedance earthed systems | |
| REL670 A32, Ver. 2.1 | Article: REL670 A32, Ver. 2.1 Line distance protection , Single breaker, 1 phase tripping | |
| REL670 B31, Ver. 2.1 | Article: REL670 B31, Ver. 2.1 Line distance protection , Multi breaker, 3 phase tripping | |
| REL670 A31, Ver. 2.1 | Article: REL670 A31, Ver. 2.1 Line distance protection , Single breaker, 3 phase tripping | |
| REL670 B32, Ver. 2.1 | Article: REL670 B32, Ver. 2.1 Line distance protection , Multi breaker, 1 phase tripping | |
| REL670 F00, Ver. 2.1 | Article: REL670 F00, Ver. 2.1 Line distance protection | |
| REL670 N00, Ver. 2.1 | Article: REL670 N00, Ver. 2.1 Line distance protection, 61850-9-2 LE | |
