Calculating General Settings For Analogue Trm Inputs 6I 4U - ABB Relion 650 Series Applications Manual

1MRK 505 287-UUS B
• High impedance differential protection (HZPDIF,87) with separate zones for busbar section 1
and busbar section 2.
• High impedance busbar protection zone 3 is used as checkzone for zone 1 and 2.
• Four step phase overcurrent protection, 3-phase output / Instantaneous phase overcurrent
protection, phase segregated output (OC4PTOC/SPTPIOC , 51_67/50) in the bus coupler bay
• Residual overcurrent protection (EF4PTOC ,51N_67N) in the bus coupler bay
• Breaker failure protection, 3-phase activation and output (CCRBRF ,50BF) in the bus coupler
bay
• Pole discordance protection (CCRPLD ,52PD) in the bus coupler bay
• Negative sequence overcurrent protection (DNSPTOC ,46) in the bus coupler bay
• Undervoltage protections (UV2PTUV ,27) connected to busbar section 1 and 2
• Overvoltage protections (OV2PTOV ,59)connected to busbar section 1 and 2
• Residual voltage protections connected to busbar section 1 and 2
3.1.1

Calculating general settings for analogue TRM inputs 6I 4U

The transformer module (TRM) has the capability of 6 current inputs (tapped to 1 or 5 A) and 4
voltage inputs.
The high impedance differential protection (HZPDIF, 87) zone 1 external differential circuits are
connected to inputs 1 – 3 (A, B and C).
The high impedance differential protection zone 3 external differential circuits are connected to
inputs 4 – 6 (A, B and C).
The 145 kV busbar section 2 phase VT is connected to inputs 7 - 9 (A, B and C).
The 145 kV busbar section 2 open delta connected VT is connected to input 10.
1. Set the current transformer inputs.
1.1.
1.2.
1.3.
1.4.
1.5.
1.6.
1.7.
1.8.
2. Set the voltage transformer inputs.
2.1.
2.2.
2.3.
3. Set
(The rated secondary voltage of the VT)
4. Set
The equivalent ratio is therefore:
Busbar protection REB650
Application manual
CTStarPoint1 to To Object . This setting has no effect on the performance of the
Set
protection function.
CTSec1 to 1 A .
Set
CTPrim1 to 1 A .
Set
Set the same values for current inputs 2 and 3.
CTStarPoint4 to To Object . This setting has no effect on the performance of the
Set
protection function.
CTSec4 to 1 A
Set
Set CTPrim4 to 1 A
Set the same values for current inputs 5 and 6.
Set VTSec7 to 110 V .
(The rated secondary voltage of the VT, given as phase-to-phase voltage)
VTPrim7 to 145 kV .
Set
(The rated secondary voltage of the VT, given as phase-to-phase voltage)
Set the same values for voltage inputs 8 and 9.
VTSec10 to 110 V .
VTPrim10 to 145 kV .
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Section 3
REB650 setting examples
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