ABB RET670 Product Manual page 97

Transformer protection
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ABB
Transformer protection RET670
Customized
Product version: 1.2
Current protection
Instantaneous phase overcurrent protection (PHPIOC)
Four step phase overcurrent protection (OC4PTOC)
Instantaneous residual overcurrent protection (EFPIOC)
Four step residual overcurrent protection (EF4PTOC)
Four step directional negative phase sequence
overcurrent protection (NS4PTOC)
Sensitive directional residual overcurrent and power
protection (SDEPSDE)
Thermal overload protection, one time constant (LPTTR)
Thermal overload protection, two time constants
(TRPTTR)
Breaker failure protection (CCRBRF)
Pole discordance protection (CCRPLD)
Directional underpower protection (GUPPDUP)
Directional overpower protection (GOPPDUP)
Capacitor bank protection (CBPGAPC)
Negative sequence time overcurrent protection for
machines (NS2PTOC)
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1MRK 504 117-BEN D
4
1MRK 002 906-AC
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1MRK 002 906-BD
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1MRK 002 906-CC
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1MRK 002 906-DD
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1MRK 002 906-DM
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1MRK 002 907-DC
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1MRK 002 906-LD
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1MRK 002 906-NC
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1MRK 002 906-RC
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1MRK 002 907-AC
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1MRK 002 902-FB
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1MRK 002 902-GB
6
1MRK 002 902-MA
2
1MRK 002 902-LA
97

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