2.2 Functional Scope
2.2.2 Setting Hints
Special Cases Most settings are self-explanatory. The special cases are described below.
If the setting group change-over function is to be used, the setting in address0103 Grp Chge OPTIONmust be set toenabled. In this case, it is possible to apply two groups of settings for the function parameters (refer also to Section 2.4) so that a convenient and fast switch-over between these setting groups is possible. The setting Disabledimplies that only one function parameter setting group can be applied and used.
Note:
The functions and default settings depend of the variant ordered (for details refer to Table 2-1 and Appendix A.1). Also, not all combinations of protective functions are possible because of certain restrictions imposed by the hardware (see Table 2-2,
“Allocation of Device Inputs to Protection Functions”).
Functional Scope
Parameter0104 FAULT VALUEis used to specify whether the oscillographic fault recording should recordInstantaneous valuesorRMS values. IfRMS values are recorded, the available recording time increases by the factor 16.
For some protective functions you can also choose the measuring inputs of the relay to which they will be allocated (side 1 or side 2); for other functions the allocation is fixed (see Table 2-2).
For example, address0112 O/C PROT. I>allows such a choice for the I> stage of the overcurrent protection (=Side 1,Side 2orDisabled).
For the high-current stage I>> of the overcurrent protection, address0113 O/C PROT. I>>allows non-directional operation for side 1/side 2 or directional operation for side 1/side2. By settingDisabled, this overcurrent stage can be excluded altogether. For the inverse time overcurrent protection set in address0114 O/C PROT. Ip, different sets of inverse characteristics are available, depending on the version ordered; they are either according to IEC or according to ANSI. This function, too, can be allocated to either side 1 or side 2 (=with IEC-characteristic on side 1,with ANSI-characteristic on side 1,with
IEC-characteristic on side 2,with ANSI-characteristic on side 2).
Inverse time overcurrent protection can be excluded altogether by settingDisabled.
Table 2-2 shows the allocation of device inputs to the protection functions. The interdependencies shown here must be kept in mind when configuring the plant. This concerns the UE input, the two sensitive current inputs IEE1 and IEE2 as well as the 3 measuring transducer inputs (TD). Where the UE input is used e.g. by the stator earth fault protection functions, it is no longer available for rotor earth fault protection (R, fn) (see also Table 2-3). The same restrictions are true for measuring transducer inputs, which can only be used by one protection function at a time. Where the TDs are not used by any protection function, they are available for general processing by the measured value blocks in CFC.
Table 2-2 Allocation of Device Inputs to Protection Functions
Protection Function ANSI
Definite-time I>; I>>
/non-directional ANSI 50
Fixed Selectable - - Selectable -
-Definite-Time I>>/directional Fixed Selectable - - Selectable -
-Inverse-Time Overcurrent Protection
ANSI 51, 67
Fixed Selectable - - Selectable -
-Thermal Overload Protection ANSI 49 - - - - Fixed - TD2
Negative Sequence Protection ANSI 46 - - - - Fixed -
-Startup Overcurrent Protection ANSI 51 - - - - Fixed -
-Differential Protection ANSI 87 - Fixed - - Fixed -
-Earth Fault Differential
Selectable - - Selectable Fixed
-Underexcitation (Loss-of-Field) Protection
ANSI 40 Fixed - - - Fixed - TD3
Reverse Power Protection ANSI 32R Fixed - - - Fixed -
-Forward Active Power Supervision
ANSI 32F Fixed - - - Fixed -
-Impedance Protection ANSI 21 Fixed - - - Fixed -
-Out-of-Step Protection ANSI 78 Fixed - - - Fixed -
-Undervoltage Protection ANSI 27 Fixed - - -
-Overvoltage Protection ANSI 59 Fixed - - -
-Frequency Protection ANSI 81 Fixed - - Fixed -
-Overexcitation (Volt/Hertz)
-Sensitive Earth Fault Protection ANSI 51GN, 64R
- - Sele
ct.
- - Select.
-100–%–Stator Earth Fault Prot.
with 3rd Harmonics
ANSI 27/
59TN
Fixed - - Fixed Fixed -
-100–%–Stator Earth Fault Prot.
with 20 Hz Voltage Injection
64G (100 %)
- - Fixed Fixed - -
-Rotor Earth Fault Protection REFP
ANSI 64R - - Fixed Fixed - -
-Sensitive Rotor Earth Fault Pro-tection with 1 to 3 Hz Square Wave Voltage Injection
ANSI 64R - - - TD1
TD2
Motor Starting Time Supervision ANSI 48 - - - - Fixed -
-Restart Inhibit for Motors ANSI 66, 49Rotor
- - - - Fixed -
-Breaker Failure Protection ANSI 50BF - Selectable - - Selectable -
-Inadvertent Energization ANSI 50/27 Fixed - - - Fixed -
-DC Voltage/-DC Current
-Threshold Supervision Fixed - - - Fixed -
-External Trip Commands - - -
-Table 2-2 Allocation of Device Inputs to Protection Functions
Protection Function ANSI
Functional Scope
For the differential protection, address0120 DIFF. PROT.allows to specify the type of protected object (Generator/Motoror3-phase Transformer); the function can be excluded altogether by settingDisabled.
Figure 2-2 Use as Generator Differential Protection
Figure 2-3 Use as Block Differential Protection (Overall Protection)
For the following application, the settings of the generator data under Power System Data 1 must be same as for the transformer data of side 2:
Figure 2-4 Use as Transformer Differential Protection 7UM62
3∼G
Side 2 Side 1
Address0120 DIFF. PROT. = Generator/Motor
7UM62
3∼G
Side 2 Side 1
Address0120 DIFF. PROT. = 3-phase Transformer
7UM62
3∼G
Side 1
Address0120 DIFF. PROT.
= 3-phase Transformer Side 2
For the following application, the differential protection of device A must be set to Generator/Motor, and that of device B to3-phase Transformer. Also, the settings of the generator data under Power System Data 1 must be same as for the transformer data of side:
Figure 2-5 Use as Redundant Overall Protection
For earth fault protection, address0150 S/E/F PROT.presents the options non-dir. only U0,non-dir. U0&I0andDirectional, unless the whole function is Disabled. The first option evaluates only the displacement voltage (to be used with unit connection). The second option evaluates in addition to the displacement voltage the magnitude of the earth fault current (or the difference between the starpoint current and the total current of a toroidal CT, as is the case in busbar systems with low-ohmic switchable starpoint resistors). The third option considers as a third criterion the direction of the earth fault current in the case of machines in busbar connection where the magnitudes of displacement voltage and earth fault current alone are not sufficient to distinguish between system earth faults and machine earth faults.
Address0151 O/C PROT. Iee>is used to specify which input will be used for earth fault current measurement (IEE1or IEE2).
Address0170 BREAKER FAILUREspecifies whether the circuit breaker failure protection will apply for side 1 or side 2.
If the 7UM62 is equipped with analog outputs and you want to use them, the addresses0173,0174,0175and0176allow to allocate the available measured values to the analog outputs. All parameters of the analog outputs are accessed under the block address0173.
For trip circuit monitoring, address0182 Trip Cir. Sup.is used to specify whether two binary inputs (with 2 Binary Inputs) or only one binary input (with 1 Binary Input) should be utilized, or whether the function should beDisabled.
7UM62
3∼G
(B) Side 1
Address0120 DIFF. PROT.
= 3-phase Transformer (A) Side 2
7UM62
A B
(A) Side 1 (B) Side 2
Address0120 DIFF. PROT.
= Generator/Motor
Functional Scope
2.2.2.1 Settings
Addr. Setting Title Setting Options Default Setting Comments 103 Grp Chge OPTION Disabled
Enabled
Disabled Setting Group Change Option
104 FAULT VALUE Disabled
Instantaneous values RMS values
Instantaneous values
Fault values
105 DIFF. PROT. Disabled
Enabled
Enabled Differential Protection
106 PROT. OBJECT Generator/Motor 3 phase Transformer
Generator/Motor Protection Object
112 O/C PROT. I> Disabled Side 1 Side 2
Side 2 Overcurrent Protection I>
113 O/C PROT. I>> Disabled
Non-Directional on side 1 Non-Directional on side 2 Directional on side 1 Directional on side 2
Non-Directional on side 2
Overcurrent Protection I>>
114 O/C PROT. Ip Disabled
with IEC-characteristic on
Disabled Inverse O/C Time Protection
116 Therm.Overload Disabled Enabled
Enabled Thermal Overload Protection
117 UNBALANCE LOAD Disabled Enabled
Enabled Unbalance Load (Negative Sequence)
118 O/C STARTUP Disabled
Enabled
Enabled Startup O/C protection
120 DIFF. PROT. Disabled
Generator/Motor 3 phase Transformer
Generator/Motor Differential Protection
121 REF PROT. Disabled
Generator/Motor with IEE2 Generator/Motor with 3I0 of Side 2
with Side 1 of Transformer with Side 2 of Transformer
Disabled Restricted earth fault protection
130 UNDEREXCIT. Disabled
Enabled
Enabled Underexcitation Protection
131 REVERSE POWER Disabled Enabled
Enabled Reverse Power Protection
132 FORWARD
POWER
Disabled Enabled
Enabled Forward Power Supervision
133 IMPEDANCE
142 FREQUENCY Prot. Disabled Enabled
Enabled Over / Underfrequency Protec-tion
143 OVEREXC. PROT. Disabled Enabled
Enabled Overexcitation Protection (U/f)
144 INV.UNDERVOLT. Disabled Enabled
Enabled Inverse Undervoltage Protec-tion Up<
145 df/dt Protect. Disabled
with 2 df/dt stages with 4 df/dt stages
with 2 df/dt stages Rate-of-frequency-change pro-tection
146 VECTOR JUMP Disabled
Enabled
Enabled Jump of Voltage Vector
150 S/E/F PROT. Disabled
non-directional only U0 non-directional with U0 & I0 directional
non-directional with U0 & I0
Stator Earth Fault Protection
151 O/C PROT. Iee> Disabled with Iee1 with Iee2
with Iee2 Sensitive Earth Current Protec-tion
152 SEF 3rd HARM. Disabled Enabled
Enabled Stator Earth Fault Prot. 3rd Har-monic
153 100% SEF-PROT. Disabled Enabled
Enabled 100% Stator-Earth-Fault Protec-tion
160 ROTOR E/F Disabled
Enabled
Enabled Rotor Earth Fault Protection (R, fn)
161 REF 1-3Hz Disabled
Enabled
Enabled Rotor Earth Fault Protection (1-3Hz)
165 STARTUP MOTOR Disabled Enabled
Enabled Motor Starting Time Supervision
166 RESTART INHIBIT Disabled Enabled
Enabled Restart Inhibit for Motors
170 BREAKER
FAILURE
Disabled Side 1 Side 2
Side 2 Breaker Failure Protection
171 INADVERT. EN. Disabled Enabled
Enabled Inadvertent Energisation
172 DC PROTECTION Disabled Enabled
Enabled DC Voltage/Current Protection Addr. Setting Title Setting Options Default Setting Comments
Functional Scope
Active Power |P| [%]
Reactive Power |Q| [%]
Frequency f [%]
|Power Factor| [%]
p.u. Temperature of Rotor [%]
p.u. Temperature of Stator [%]
Disabled Analog Output B1 (Port B)
174 ANALOGOUTPUT
Active Power |P| [%]
Reactive Power |Q| [%]
Frequency f [%]
|Power Factor| [%]
p.u. Temperature of Rotor [%]
p.u. Temperature of Stator [%]
Disabled Analog Output B2 (Port B)
175 ANALOGOUTPUT
Active Power |P| [%]
Reactive Power |Q| [%]
Frequency f [%]
|Power Factor| [%]
p.u. Temperature of Rotor [%]
p.u. Temperature of Stator [%]
Disabled Analog Output D1 (Port D) Addr. Setting Title Setting Options Default Setting Comments
176 ANALOGOUTPUT
Active Power |P| [%]
Reactive Power |Q| [%]
Frequency f [%]
|Power Factor| [%]
p.u. Temperature of Rotor [%]
p.u. Temperature of Stator [%]
Disabled Analog Output D2 (Port D)
180 FUSE FAIL MON. Disabled Enabled
Enabled Fuse Failure Monitor
181 M.V. SUPERV Disabled
Enabled
Enabled Measured Values Supervision
182 Trip Cir. Sup. Disabled
with 2 Binary Inputs with 1 Binary Input
Disabled Trip Circuit Supervision
185 THRESHOLD Disabled
Enabled
Enabled Threshold Supervision
186 EXT. TRIP 1 Disabled
Enabled
Enabled External Trip Function 1
187 EXT. TRIP 2 Disabled
Enabled
Enabled External Trip Function 2
188 EXT. TRIP 3 Disabled
Enabled
Enabled External Trip Function 3
189 EXT. TRIP 4 Disabled
Enabled
Enabled External Trip Function 4
190 RTD-BOX INPUT Disabled Port C Port D Port E
Disabled External Temperature Input
191 RTD CONNECTION 6 RTD simplex operation 6 RTD half duplex operation 12 RTD half duplex opera-tion
6 RTD simplex operation
Ext. Temperature Input Connec-tion Type
Addr. Setting Title Setting Options Default Setting Comments
Power System Data 1