MainsPro G99TT with seal

Order code: MP1G99TTAAB

MainsPro G99TT is an easy-to-install mains protection relay for parallel-to-mains applications. It reliably monitors voltage, frequency and loss of mains protections to safeguard both the distribution network and the generators. This protection relay is designed for installations with renewable energy sources such as photovoltaic plants, gen-sets, cogeneration units, and microturbines.
 
  • Reliable measurements evaluation      
  • Full compliance with ENA EREC G99    
  • Secured protection settings     

Compliant with international grid codes: ENA EREC G99, IEC 60255, G98, G99, IEn NR 005/2012 and VDE-AR-N 4105

    MainsPro G99TT with seal

The MainsPro G99TT is a G99 type tested mains protection relay. The G99 functions were added to ensure compliance with the European Requirements for generators which were adopted by the United Kingdom in the GB Distribution and Grid Codes list.  The main change is moving from Vector to ROCOF (Rate of Change of Frequency) protection to detect how quickly the system frequency is changing by continuously sampling the frequency of mains voltage. The protection settings of the product are set during manufacturing, and some of them can be changed only by authorised personnel.

The MainsPro G99TT offers:

  • Wide power supply and measurement range
  • Easy set-up via a user-friendly interface
  • Simple wiring with detachable connectors
  • Suitable for standard DIN rail installation
  • Advanced frequency, voltage and loss of mains protections
  • Event-based history for troubleshooting and incident management
  • Integrated mechanical lock for securing the defined settings
  • Breaker failure protection and watchdog feature
  • Resistance to frequency jumps 

Frequently Asked Questions

Can I unlock my controller?

If you have forgotten your controller password, it can be found using the password decode function.

You will need the following information about your device:

  • serial number
  • "password decode" number
Both numbers can be obtained through the monitoring software relevant to the device.
  • Serial number is available in Controller info
  • Password decode number is available in Values / Info

You can also show these numbers on your device's display. Typically, this requires a sequence or combination of buttons to be pressed. Details can be found typically in the device Operator guide.

Once you have these numbers, please contact your ComAp distributor and they will help you get your password back.

 

How do I connect to my ComAp controller? What types of connections are supported?

ComAp offers a wide range of options to connect to your controller:

  • RS232 / RS485
  • USB - USB A<->B (usually a printer cable)
  • Internet connection - LAN, GPRS, 3G, 4G

Note that some connection types require you to use a communication module (plug-in eg a RS232 card) or communication bridge (external device eg Internet Bridge NT).

Each ComAp device usually allows for multiple ways of connection. The simplest one supported by the majority of our devices is the RS232 (serial) connection. For this, you need an RS232 cable (null modem) and if your PC is not equipped with an RS232 port you need a USB<->RS232 converter.
USB connections are very common. Almost all ComAp devices support connection using simple USB A<->B cable (printer cable) for easy configuration. Some devices can be powered from the USB port for programming to allow easy configuration right on your desk.
Other connection types: Internet connection (LAN, GPRS, 3G, 4G), Modbus RTU, Modbus TCP, SNMP, AirGate, Modem.
Note that some connection types require you to use a communication module (plug-in eg a RS232 card) or communication bridge (external device eg Internet Bridge NT). Not all types of connection are possible on each device. You can find all the details related to this topic in your device's Comprehensive guide or Communication guide.
 
Detailed information about connection to:
InteliLite NT, InteliATS NT, InteliCompact NT is available IL-NT, IA-NT, IC-NT Communication Guide (page 21)
InteliGen-NT, InteliSys-NT, InteliMains-NT is available in IGS-NT Communication Guide (page 19)
InteliLite is available in Global Guide InteliLite AMF25 Global Guide (page 126)

 

How do I change the controller firmware? Where can I get the latest firmware?

You can download the latest firmware package on the webpage of the device. You can easily navigate there through the ‘Products’ section or just use the Search function. If you cannot find the firmware on the website or if you require different than the offered version do not hesitate to contact our support team.

The firmware upgrade itself is easy to perform. You need the appropriate configuration software and a connection to the controller (preferably a direct connection). Prior to initiating the update process, we strongly recommend you to save a complete backup of your device.

It usually consists of several steps:
  • Create a controller back up.
  • Update the device firmware. It will contain default Configuration Archive and default Application.
  • Change the Application (SPtM, MiNT, MCB, MGCB, BTB, etc) to the required type (by programming appropriate default archive to the controller).
  • Use the Import Configuration Wizard to restore your previous configuration. In some cases manual interventions might be needed during this step.
  • Optional: Update the connected display firmware or device communication module firmware.
Should you be unsuccessful in programming the new version, the rollback procedure is to install previous firmware version and use your back up to restore the controller to its original state before the firmware upgrade was attempted.

What do SPtM, MINT, MGCB stand for?

SPtM = Single Parallel to Mains
MINT = Multiple gen-sets with INTernal sync and load sharing
MGCB = Master Generator Circuit Breaker

ComAp’s world is full of abbreviations but once you get a basic understanding of their meanings, you will find them useful when reading the documentation or communicating with us.
 

How do I synchronize a gen-set to the mains? What AVRs do you support? What Speed Governonrs do you support?

The ComAp product portfolio includes controllers that can control voltage and speed and with those products our controllers are able to synchronise to the mains.

Synchronizing a gen-set to mains (or multiple gensets to each other) is a procedure which requires the following conditions to be met before you connect the two electrical systems together:
  • Matching voltage in all phases of both systems.
  • Matching frequency of both systems.
  • 0° phase angle between both systems. (Or as close to 0° as possible.)
  • Matching sense of rotation of both systems.
The last condition is predetermined by wiring and needs to be checked prior to commissioning, the rest can be controlled by a ComAp device. In order to do so you need to interface the generator AVR (Automatic Voltage Regulator) and the engine Speed Governor. ComAp controllers designed for paralleling operations typically have outputs designed for this connection. Thanks to this we are able to control the generator voltage and the engine speed (and subsequently phase angle).
 
The procedure of configuring the speed and voltage regulation is described in the relevant documentation. The same document also contains the list of supported AVRs and Speed Governors including the wiring and configuration setpoints.

What our customers say

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  • 24-hour support on working days
  • Local contacts in 179 countries
  • Remote and in-person trainings and a range of support materials
  • Expert consultation, troubleshooting, and much more

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