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1

Introduction

Woodward offers a special G99-type-tested variant of the MRU4. It has some protection
settings fixed or restricted to the value ranges that are specified 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 differences 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 27

th

, 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 fixed in the firmware

of the protection device and cannot be changed. The settings that must be
predefined by the manufacturer are explicitly given in Table 10.1 of the
EREC G99‑1‑6.

• The 

voltage

 protection settings are predefined in the firmware of the protection

device. These default values are dependent on the type (defined above) and given in
Table 10.1 of the EREC G99‑1‑6. These settings, however, may be modified by
appropriately qualified personnel.

• Moreover, all settings that are permitted to be modified must be password-

protected. This way it can be ensured that only qualified 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

 

Содержание HighPROTEC MRU4-2 G Series

Страница 1: ...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...

Страница 2: ...n Germany Telephone 49 0 21 52 145 1 Internet www woodward com Sales Telephone 49 0 21 52 145 331 Fax 49 0 21 52 145 354 Email SalesPGD_EMEA woodward com Service Telephone 49 0 21 52 145 614 Fax 49 0...

Страница 3: ...ding to the HV Requirements 12 2 1 5 V 5 Voltage Protection Pre Configured According to the HV Requirements 14 2 1 6 V 6 Voltage Protection Pre Configured According to the HV Requirements 16 2 2 G99 S...

Страница 4: ...oint 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...

Страница 5: ...es of the voltage protection module that are pre configured as follows V 1 is pre configured as an undervoltage protection according to the LV requirements V 2 is pre configured as overvoltage protect...

Страница 6: ...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 pa...

Страница 7: ...h 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 bu...

Страница 8: ...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 pa...

Страница 9: ...h 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 bu...

Страница 10: ...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 pas...

Страница 11: ...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...

Страница 12: ...u 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 acc...

Страница 13: ...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...

Страница 14: ...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 acce...

Страница 15: ...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...

Страница 16: ...e 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 inacti...

Страница 17: ...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...

Страница 18: ...planning f Frequency protection instance number 1 Configured as underfrequency protection This setting is fixed according to the G99 requirements and cannot be modified Fixed setting f 1 f Protection...

Страница 19: ...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 fixed according to the G99 requirements and cannot be modified Fixed value f 2 t Protection...

Страница 20: ...et 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 fixed according to the G99 requirements and cannot be modified Fixed value f 3 t Protection P...

Страница 21: ...s enabled by default but can be disabled For the password protection of access level S 3 see the Security chapter in the generic MRU4 User Manual S 3 Intertripping Function Protection Para Set 1 4 Int...

Страница 22: ...cannot be modified Fixed setting df dt df dt Protection Para Set 1 4 Intercon Prot Mains Decouplg df dt Set 1 1 00 Hz s Set 2 1 00 Hz s Set 3 1 00 Hz s Set 4 1 00 Hz s Measured value calculated Rate...

Страница 23: ...Cmd3 V 3 TripCmd SG 1 Off Cmd4 V 4 TripCmd SG 1 Off Cmd5 V 5 TripCmd SG 1 Off Cmd6 V 6 TripCmd SG 1 Off Cmd7 f 1 TripCmd SG 1 Off Cmd8 f 2 TripCmd SG 1 Off Cmd9 f 3 TripCmd SG 1 Off Cmd10 df dt TripCm...

Страница 24: ...om Service Fax 49 0 21 52 145 354 Telephone 49 0 21 52 145 614 Email industrial support woodward com Woodward has company owned plants subsidiaries and branches as well as authorized distributors and...

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