Woodward HighPROTEC MRU4-2 G Series User manual

Version: 3.6.g (Build 48004)
Original document ‧ English
Supplement MRU4-3.6-EN-G99
© 2020
MRU4‑2xxxxx+G
Voltage Protection
G99-Type-Tested Variant

Woodward Kempen GmbH
Krefelder Weg 47 ∙ D–47906 Kempen (Germany)
Postfach 10 07 55 (P.O.Box) ∙ D–47884 Kempen (Germany)
Telephone: [phone]
Internet: www.woodward.com
Sales
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Service
Telephone: [phone]
Fax: [phone]
Email: [email protected]
© 2020 Woodward Kempen GmbH
2 MRU4 MRU4-3.6-EN-G99

Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4█
2G99-Speci󰍏c Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5█
2.1 G99-Speci󰍓c Voltage Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5█
2.1.1 V[1]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6█
2.1.2 V[2]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8█
2.1.3 V[3]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10█
2.1.4 V[4]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12█
2.1.5 V[5]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14█
2.1.6 V[6]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16█
2.2 G99-Speci󰍓c Frequency Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18█
2.2.1 f[1]: Underfrequency Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18█
2.2.2 f[2]: Underfrequency Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19█
2.2.3 f[3]: Overfrequency Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20█
2.3 G99-Speci󰍓c LoM Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21█
2.3.1 Intertripping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21█
2.3.2 df/dt: ROCOF (Rate-of-Change-of-Frequency) Protection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22█
3G99-Speci󰍏c Switchgear / Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23█
3MRU4MRU4-3.6-EN-G99
Table of Contents

1 Introduction
Woodward o󰍒ers a special G99-type-tested variant of the MRU4. It has some protection
settings 󰍓xed or restricted to the value ranges that are speci󰍓ed and required in the
Engineering Recommendation G99 (Issue 1 Amendment 6).
If you need this MRU4 variant make sure to use the order code MRU4‑2xxxxx+G (with a
trailing “+G”) when you place your order.
(Note, however, that this “+G” is not shown as part of the typecode of the MRU4.)
This document details all the di󰍒erences between this G99-type-tested variant and an
ordinary MRU4, but without repeating the all the features that both have in common.
Therefore it is a supplement to the ordinary Technical Documentation of the MRU4, not a
replacement.
Background
The Engineering Recommendation G99 distinguishes the following types of power
engineering modules that have been installed after April 27th, 2019:
• Type A — connection point below 110 kV, 0.8 kW … 1 MW
• Type B — connection point below 110 kV, 1 MW … 10 MW
• Type C — connection point below 110 kV, 10.8 MW … 50 MW
• Type D — connection point ≥ 110 kV and/or registered capacity > 50 MW
Depending on the type to be protected, the EREC G99‑1‑6 makes the following
requirements for the voltage and frequency protection settings:
• The frequency and Loss of Mains (LoM) protection settings are 󰍓xed in the 󰍓rmware
of the protection device and cannot be changed. The settings that must be
prede󰍓ned by the manufacturer are explicitly given in Table 10.1 of the
EREC G99‑1‑6.
•The voltage protection settings are prede󰍓ned in the 󰍓rmware of the protection
device. These default values are dependent on the type (de󰍓ned above) and given in
Table 10.1 of the EREC G99‑1‑6. These settings, however, may be modi󰍓ed by
appropriately quali󰍓ed personnel.
• Moreover, all settings that are permitted to be modi󰍓ed must be password-
protected. This way it can be ensured that only quali󰍓ed users are able to alter these
settings.
Password-protected settings are a standard feature of all {?PLATFORM} devices, i. e.
not restricted to the G99-type-tested variant.
For the password-protection in general, see the “Security” chapter in the generic
MRU4 User Manual.
4 MRU4 MRU4-3.6-EN-G99
1 Introduction

2G99-Speci󰍏c Protection Settings
In general, all protection functions that are required for an Interface Protection device by
the EREC G99‑1‑6 are enabled in the [Device planning] menu. All other protection
functions are disabled by default, but can be enabled.
Besides this, only the protection functions that are needed for Types A, B and C HV
protection are set to “active” by default. (See the parameter lists in the following
chapters.)
Furthermore, all the protection functions (for all these Types) are assigned to the circuit
breaker module in the menu [Control / SG / SG[1] / Trip Manager]. (See also ╚═▷ “3 G99-
Speci󰍓c Switchgear / Control Settings”.)
2.1 G99-Speci󰍏c Voltage Protection Settings
The MRU4 features six instances of the voltage protection module, that are pre-
con󰍓gured as follows:
• »V[1]« is pre-con󰍓gured as an undervoltage protection according to the LV
requirements.
• »V[2]« is pre-con󰍓gured as overvoltage protection stage 1 according to the LV
requirements.
• »V[3]« is pre-con󰍓gured as overvoltage protection stage 2 according to the LV
requirements.
• »V[4]« is pre-con󰍓gured as an undervoltage protection according to the HV
requirements.
• »V[5]« is pre-con󰍓gured as overvoltage protection stage 1 according to the HV
requirements.
• »V[6]« is pre-con󰍓gured as overvoltage protection stage 2 according to the HV
requirements.
This stage is optional for Type D applications and may be disabled for these.
During commissioning the user has to check the interconnection constraints and disable
the instances in the [Device planning] menu that are not needed for the application.
5MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings

2.1.1 V[1]: Voltage Protection Pre-Con󰍏gured According to the LV
Requirements
V[1] . Mode [Device planning]
V< Voltage protection instance number 1: Pre-con󰈠gured
as undervoltage protection for LV connections.
For the password-protection (of access level “S.3”), see
the “Security” chapter in the generic MRU4 User
Manual.
S.3
V[1] . Function [Protection Para / Set 1…4 / V-Prot / V[1]]
•Set 1: inactive
•Set 2: inactive
•Set 3: inactive
•Set 4: inactive
Permanent activation or deactivation of module/stage:
This instance V[1] is pre-con󰍓gured for LV applications.
It is inactive by default because the MRU4 factory-
preset has the HV settings enabled. This means that
for an LV protection, you have to make the following
settings:
•»V[1] . Function« = “active”,
and the same for »V[2]«, »V[3]«
•»V[4] . Function« = “inactive”,
and the same for »V[5]«, »V[6]«
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[1] . Measuring Mode [Protection Para / Set 1…4 / V-Prot / V[1]]
•Set 1: Phase to Ground
•Set 2: Phase to Ground
•Set 3: Phase to Ground
•Set 4: Phase to Ground
Measuring/Supervision Mode: Determines if the phase-
to-phase or phase-to-earth voltages are to be
supervised.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
6 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.1 V[1]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements

V[1] . V< [Protection Para / Set 1…4 / V-Prot / V[1]]
•Set 1: 0.80 Vn
•Set 2: 0.80 Vn
•Set 3: 0.80 Vn
•Set 4: 0.80 Vn
If the pickup value is exceeded, the module is started.
The de󰈠nition of Vn is dependent on both the Field
Parameter »VT con« and the Setting Group
Parameter »Measuring Mode«:
If the measuring inputs of the voltage measuring card
are fed with phase-to-ground voltages (»VT con« =
“Phase to Ground”) then »Measuring Mode« = “Phase
to Ground” means that Vn = VT sec / √3,
and »Measuring Mode« = “Phase to Phase” means that
Vn = VT sec.
However, if the measuring inputs of the voltage
measuring card are fed with phase-to-phase voltages
(»VT con« = “Phase to Phase”) then the setting of
"Measuring Mode" is ignored and internally set to
“Phase to Phase” instead, so that Vn = VT sec.
Set to the required threshold by default, but can be
modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[1] . t[Protection Para / Set 1…4 / V-Prot / V[1]]
•Set 1: 2.5 s
•Set 2: 2.5 s
•Set 3: 2.5 s
•Set 4: 2.5 s
Tripping delay: Set to the required value by default,
but can be modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
7MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.1 V[1]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements

2.1.2 V[2]: Voltage Protection Pre-Con󰍏gured According to the LV
Requirements
V[2] . Mode [Device planning]
V> Voltage protection instance number 2: Pre-con󰈠gured
as overvoltage protection for LV connections.
For the password-protection (of access level “S.3”), see
the “Security” chapter in the generic MRU4 User
Manual.
S.3
V[2] . Function [Protection Para / Set 1…4 / V-Prot / V[2]]
•Set 1: inactive
•Set 2: inactive
•Set 3: inactive
•Set 4: inactive
Permanent activation or deactivation of module/stage:
This instance V[2] is pre-con󰍓gured for LV applications.
It is inactive by default because the MRU4 factory-
preset has the HV settings enabled. This means that
for an LV protection, you have to make the following
settings:
•»V[1] . Function« = “active”,
and the same for »V[2]«, »V[3]«
•»V[4] . Function« = “inactive”,
and the same for »V[5]«, »V[6]«
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[2] . Measuring Mode [Protection Para / Set 1…4 / V-Prot / V[2]]
•Set 1: Phase to Ground
•Set 2: Phase to Ground
•Set 3: Phase to Ground
•Set 4: Phase to Ground
Measuring/Supervision Mode: Determines if the phase-
to-phase or phase-to-earth voltages are to be
supervised.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
8 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.2 V[2]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements

V[2] . V> [Protection Para / Set 1…4 / V-Prot / V[2]]
•Set 1: 1.14 Vn
•Set 2: 1.14 Vn
•Set 3: 1.14 Vn
•Set 4: 1.14 Vn
If the pickup value is exceeded, the module is started.
The de󰈠nition of Vn is dependent on both the Field
Parameter »VT con« and the Setting Group
Parameter »Measuring Mode«:
If the measuring inputs of the voltage measuring card
are fed with phase-to-ground voltages (»VT con« =
“Phase to Ground”) then »Measuring Mode« = “Phase
to Ground” means that Vn = VT sec / √3,
and »Measuring Mode« = “Phase to Phase” means that
Vn = VT sec.
However, if the measuring inputs of the voltage
measuring card are fed with phase-to-phase voltages
(»VT con« = “Phase to Phase”) then the setting of
"Measuring Mode" is ignored and internally set to
“Phase to Phase” instead, so that Vn = VT sec.
Set to the required threshold by default, but can be
modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[2] . t[Protection Para / Set 1…4 / V-Prot / V[2]]
•Set 1: 1.0 s
•Set 2: 1.0 s
•Set 3: 1.0 s
•Set 4: 1.0 s
Tripping delay: Set to the required value by default,
but can be modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
9MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.2 V[2]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements

2.1.3 V[3]: Voltage Protection Pre-Con󰍏gured According to the LV
Requirements
V[3] . Mode [Device planning]
V> Voltage protection instance number 3: Pre-con󰈠gured
as overvoltage protection for LV connections.
For the password-protection (of access level “S.3”), see
the “Security” chapter in the generic MRU4 User
Manual.
S.3
V[3] . Function [Protection Para / Set 1…4 / V-Prot / V[3]]
•Set 1: inactive
•Set 2: inactive
•Set 3: inactive
•Set 4: inactive
Permanent activation or deactivation of module/stage:
This instance V[3] is pre-con󰍓gured for LV applications.
It is inactive by default because the MRU4 factory-
preset has the HV settings enabled. This means that
for an LV protection, you have to make the following
settings:
•»V[1] . Function« = “active”,
and the same for »V[2]«, »V[3]«
•»V[4] . Function« = “inactive”,
and the same for »V[5]«, »V[6]«
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[3] . Measuring Mode [Protection Para / Set 1…4 / V-Prot / V[3]]
•Set 1: Phase to Ground
•Set 2: Phase to Ground
•Set 3: Phase to Ground
•Set 4: Phase to Ground
Measuring/Supervision Mode: Determines if the phase-
to-phase or phase-to-earth voltages are to be
supervised.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
10 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.3 V[3]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements

V[3] . V> [Protection Para / Set 1…4 / V-Prot / V[3]]
•Set 1: 1.19 Vn
•Set 2: 1.19 Vn
•Set 3: 1.19 Vn
•Set 4: 1.19 Vn
If the pickup value is exceeded, the module is started.
The de󰈠nition of Vn is dependent on both the Field
Parameter »VT con« and the Setting Group
Parameter »Measuring Mode«:
If the measuring inputs of the voltage measuring card
are fed with phase-to-ground voltages (»VT con« =
“Phase to Ground”) then »Measuring Mode« = “Phase
to Ground” means that Vn = VT sec / √3,
and »Measuring Mode« = “Phase to Phase” means that
Vn = VT sec.
However, if the measuring inputs of the voltage
measuring card are fed with phase-to-phase voltages
(»VT con« = “Phase to Phase”) then the setting of
"Measuring Mode" is ignored and internally set to
“Phase to Phase” instead, so that Vn = VT sec.
Set to the required threshold by default, but can be
modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[3] . t[Protection Para / Set 1…4 / V-Prot / V[3]]
•Set 1: 0.5 s
•Set 2: 0.5 s
•Set 3: 0.5 s
•Set 4: 0.5 s
Tripping delay: Set to the required value by default,
but can be modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
11MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.3 V[3]: Voltage Protection Pre-Con󰍓gured According to the LV Requirements

2.1.4 V[4]: Voltage Protection Pre-Con󰍏gured According to the HV
Requirements
V[4] . Mode [Device planning]
V< Voltage protection instance number 4: Pre-con󰈠gured
as undervoltage protection for HV connections.
For the password-protection (of access level “S.3”), see
the “Security” chapter in the generic MRU4 User
Manual.
S.3
V[4] . Function [Protection Para / Set 1…4 / V-Prot / V[4]]
•Set 1: active
•Set 2: active
•Set 3: active
•Set 4: active
Permanent activation or deactivation of module/stage:
This instance V[6] is pre-con󰍓gured for HV
applications.
It is active by default. This means that if you need to
switch to LV protection, you have to make the following
settings:
•»V[1] . Function« = “active”,
and the same for »V[2]«, »V[3]«
•»V[4] . Function« = “inactive”,
and the same for »V[5]«, »V[6]«
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[4] . Measuring Mode [Protection Para / Set 1…4 / V-Prot / V[4]]
•Set 1: Phase to Phase
•Set 2: Phase to Phase
•Set 3: Phase to Phase
•Set 4: Phase to Phase
Measuring/Supervision Mode: Determines if the phase-
to-phase or phase-to-earth voltages are to be
supervised.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
12 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.4 V[4]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements

V[4] . V< [Protection Para / Set 1…4 / V-Prot / V[4]]
•Set 1: 0.80 Vn
•Set 2: 0.80 Vn
•Set 3: 0.80 Vn
•Set 4: 0.80 Vn
If the pickup value is exceeded, the module is started.
The de󰈠nition of Vn is dependent on both the Field
Parameter »VT con« and the Setting Group
Parameter »Measuring Mode«:
If the measuring inputs of the voltage measuring card
are fed with phase-to-ground voltages (»VT con« =
“Phase to Ground”) then »Measuring Mode« = “Phase
to Ground” means that Vn = VT sec / √3,
and »Measuring Mode« = “Phase to Phase” means that
Vn = VT sec.
However, if the measuring inputs of the voltage
measuring card are fed with phase-to-phase voltages
(»VT con« = “Phase to Phase”) then the setting of
"Measuring Mode" is ignored and internally set to
“Phase to Phase” instead, so that Vn = VT sec.
Set to the required threshold by default, but can be
modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[4] . t[Protection Para / Set 1…4 / V-Prot / V[4]]
•Set 1: 2.5 s
•Set 2: 2.5 s
•Set 3: 2.5 s
•Set 4: 2.5 s
Tripping delay: Set to the required value by default,
but can be modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
13MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.4 V[4]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements

2.1.5 V[5]: Voltage Protection Pre-Con󰍏gured According to the HV
Requirements
V[5] . Mode [Device planning]
V> Voltage protection instance number 5: Pre-con󰈠gured
as overvoltage protection for HV connections.
For the password-protection (of access level “S.3”), see
the “Security” chapter in the generic MRU4 User
Manual.
S.3
V[5] . Function [Protection Para / Set 1…4 / V-Prot / V[5]]
•Set 1: active
•Set 2: active
•Set 3: active
•Set 4: active
Permanent activation or deactivation of module/stage:
This instance V[5] is pre-con󰍓gured for HV
applications.
It is active by default. This means that if you need to
switch to LV protection, you have to make the following
settings:
•»V[1] . Function« = “active”,
and the same for »V[2]«, »V[3]«
•»V[4] . Function« = “inactive”,
and the same for »V[5]«, »V[6]«
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[5] . Measuring Mode [Protection Para / Set 1…4 / V-Prot / V[5]]
•Set 1: Phase to Phase
•Set 2: Phase to Phase
•Set 3: Phase to Phase
•Set 4: Phase to Phase
Measuring/Supervision Mode: Determines if the phase-
to-phase or phase-to-earth voltages are to be
supervised.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
14 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.5 V[5]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements

V[5] . V> [Protection Para / Set 1…4 / V-Prot / V[5]]
•Set 1: 1.10 Vn
•Set 2: 1.10 Vn
•Set 3: 1.10 Vn
•Set 4: 1.10 Vn
If the pickup value is exceeded, the module is started.
The de󰈠nition of Vn is dependent on both the Field
Parameter »VT con« and the Setting Group
Parameter »Measuring Mode«:
If the measuring inputs of the voltage measuring card
are fed with phase-to-ground voltages (»VT con« =
“Phase to Ground”) then »Measuring Mode« = “Phase
to Ground” means that Vn = VT sec / √3,
and »Measuring Mode« = “Phase to Phase” means that
Vn = VT sec.
However, if the measuring inputs of the voltage
measuring card are fed with phase-to-phase voltages
(»VT con« = “Phase to Phase”) then the setting of
"Measuring Mode" is ignored and internally set to
“Phase to Phase” instead, so that Vn = VT sec.
Set to the required threshold by default, but can be
modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[5] . t[Protection Para / Set 1…4 / V-Prot / V[5]]
•Set 1: 1.0 s
•Set 2: 1.0 s
•Set 3: 1.0 s
•Set 4: 1.0 s
Tripping delay: Set to the required value by default,
but can be modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
15MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.5 V[5]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements

2.1.6 V[6]: Voltage Protection Pre-Con󰍏gured According to the HV
Requirements
V[6] . Mode [Device planning]
V> Voltage protection instance number 6: Pre-con󰈠gured
as overvoltage protection for HV connections.
For the password-protection (of access level “S.3”), see
the “Security” chapter in the generic MRU4 User
Manual.
S.3
V[6] . Function [Protection Para / Set 1…4 / V-Prot / V[6]]
•Set 1: active
•Set 2: active
•Set 3: active
•Set 4: active
Permanent activation or deactivation of module/stage:
This instance V[6] is pre-con󰍓gured for HV
applications.
It is active by default. This means that if you need to
switch to LV protection, you have to make the following
settings:
•»V[1] . Function« = “active”,
and the same for »V[2]«, »V[3]«
•»V[4] . Function« = “inactive”,
and the same for »V[5]«, »V[6]«
Furthermore, this stage is optional for Type D
applications and may be set to inactive for these.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[6] . Measuring Mode [Protection Para / Set 1…4 / V-Prot / V[6]]
•Set 1: Phase to Phase
•Set 2: Phase to Phase
•Set 3: Phase to Phase
•Set 4: Phase to Phase
Measuring/Supervision Mode: Determines if the phase-
to-phase or phase-to-earth voltages are to be
supervised.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
16 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.6 V[6]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements

V[6] . V> [Protection Para / Set 1…4 / V-Prot / V[6]]
•Set 1: 1.13 Vn
•Set 2: 1.13 Vn
•Set 3: 1.13 Vn
•Set 4: 1.13 Vn
If the pickup value is exceeded, the module is started.
The de󰈠nition of Vn is dependent on both the Field
Parameter »VT con« and the Setting Group
Parameter »Measuring Mode«:
If the measuring inputs of the voltage measuring card
are fed with phase-to-ground voltages (»VT con« =
“Phase to Ground”) then »Measuring Mode« = “Phase
to Ground” means that Vn = VT sec / √3,
and »Measuring Mode« = “Phase to Phase” means that
Vn = VT sec.
However, if the measuring inputs of the voltage
measuring card are fed with phase-to-phase voltages
(»VT con« = “Phase to Phase”) then the setting of
"Measuring Mode" is ignored and internally set to
“Phase to Phase” instead, so that Vn = VT sec.
Set to the required threshold by default, but can be
modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
V[6] . t[Protection Para / Set 1…4 / V-Prot / V[6]]
•Set 1: 0.5 s
•Set 2: 0.5 s
•Set 3: 0.5 s
•Set 4: 0.5 s
Tripping delay: Set to the required value by default,
but can be modi󰍓ed by quali󰍓ed users.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
17MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.1.6 V[6]: Voltage Protection Pre-Con󰍓gured According to the HV Requirements

2.2 G99-Speci󰍏c Frequency Protection Settings
The MRU4 features six instances of the frequency protection module.
• »f[1]« is con󰍓gured and 󰍓xed as under-frequency stage 1.
• »f[2]« is con󰍓gured and 󰍓xed as under-frequency stage 2.
• »f[3]« is con󰍓gured and 󰍓xed as over-frequency stage 1.
• »f[4]«, »f[5]«, »f[6]« are not enabled by default, but may be enabled and adapted to
the application if necessary. (See the Reference Manual of the generic MRU4 variant
for available settings.)
2.2.1 f[1]: Underfrequency Protection Settings
f[1] . Mode [Device planning]
f< Frequency protection instance number 1:
Con󰈠gured as underfrequency protection.
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
setting!
f[1] . f< [Protection Para / Set 1…4 / f-Prot / f[1]]
•Set 1: 47.50 Hz
•Set 2: 47.50 Hz
•Set 3: 47.50 Hz
•Set 4: 47.50 Hz
Pickup value for underfrequency.
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
value!
f[1] . t[Protection Para / Set 1…4 / f-Prot / f[1]]
•Set 1: 20.00 s
•Set 2: 20.00 s
•Set 3: 20.00 s
•Set 4: 20.00 s
Tripping delay
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
value!
18 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.2 G99-Speci󰍓c Frequency Protection Settings

2.2.2 f[2]: Underfrequency Protection Settings
f[2] . Mode [Device planning]
f< Frequency protection instance number 2:
Con󰈠gured as underfrequency protection.
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
setting!
f[2] . f< [Protection Para / Set 1…4 / f-Prot / f[2]]
•Set 1: 47.00 Hz
•Set 2: 47.00 Hz
•Set 3: 47.00 Hz
•Set 4: 47.00 Hz
Pickup value for underfrequency.
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
value!
f[2] . t[Protection Para / Set 1…4 / f-Prot / f[2]]
•Set 1: 0.50 s
•Set 2: 0.50 s
•Set 3: 0.50 s
•Set 4: 0.50 s
Tripping delay
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
value!
19MRU4MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.2.2 f[2]: Underfrequency Protection Settings

2.2.3 f[3]: Overfrequency Protection Settings
f[3] . Mode [Device planning]
f> Frequency protection instance number 3:
Con󰈠gured as overfrequency protection.
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
setting!
f[3] . f< [Protection Para / Set 1…4 / f-Prot / f[3]]
•Set 1: 52.00 Hz
•Set 2: 52.00 Hz
•Set 3: 52.00 Hz
•Set 4: 52.00 Hz
Pickup value for underfrequency.
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
value!
f[3] . t[Protection Para / Set 1…4 / f-Prot / f[3]]
•Set 1: 0.50 s
•Set 2: 0.50 s
•Set 3: 0.50 s
•Set 4: 0.50 s
Tripping delay
This setting is 󰍓xed according to the G99
requirements and cannot be modi󰍓ed.
Fixed
value!
20 MRU4 MRU4-3.6-EN-G99
2 G99-Speci󰍓c Protection Settings
2.2.3 f[3]: Overfrequency Protection Settings