Grootvlei Power Station - Mpumalanga

Grootvlei Power Station Grootvlei in the winter

Location: The station is situated close to the town of Balfour in Mpumalanga.

Technical details:
Six 200MW units - Installed capacity: 1 200MW
Design efficiency at rated turbine MCR (%): 32.90%

History: The first of Grootvlei's six units was commissioned in 1969. Three of Grootvlei's units were mothballed in 1989 and the rest in 1990. The station is 32 years old this year.

General: Grootvlei's units 5 and 6 were the first test facilities for dry cooling in South Africa. Unit 6 has an indirect dry cooling system. The buildings were completed in December 2006.

A TOA VX-2000 emergency voice evacuation system was chosen by the client and the consultants as the preferred system for emergency situations should they arise.

The TOA VX-2000 Integrated Voice Evacuation System (covered by a 5 Year Warranty), originally built to comply with EN60849:2005 (adopted by SA as SANS60849) is ideal for this type of application where there are multiple zones and each floor is to be treated as an independent zone which is capable of having its own dedicated microphone for the Fire Marshall controlling that floor.

It also provides for Multiple Zone and Fireman's microphones on the system, each with their own priority status as well as phased evacuation as multiple messages and or tones can be broadcast in different zones / areas simultaneously.

The entire system is self-monitored every 100 seconds with fault indications registering on the rack equipment as well as the control microphones. Logs are automatically generated (announcements, system faults, inputs, automatic messages and alarm tones, faulty lines, etc).

It is also possible to utilize the system for BGM (Background Music) as each zone is able to have its own music source and volume levels or the same source can be routed to specific zones, a group of zones or all zones). White noise too, can be integrated with the system.

RM-200XF Fireman's microphone
RM-200XF Fireman's microphone


RM-200X multi-zone paging microphone
RM-200X Zone paging microphone


CS-64 Outdoor projection speaker
CS-64 Outdoor projection speaker


VM-2000 PA-Evac system
VM-2240 PA/Evac system


TOA VX-2000 Voice Evacuation System

TOA VM-2240 Voice Evacuation System

CS-64 Projection Speaker for outdoor use

TP-M15E Explosion Proof Horn Speaker

DH-12B Straight Horn Speaker

TOA PC-1867FC Firedome Ceiling Mount speakers

Standards to which the equipment complies:
SANS-60849 & BS-5839 part 5)

VX-2000 Emergency Voice Evacuation System
VX-2000 Emergency Voice Evacuation System


BS-5839 Compliant
BS-5839 Compliant ceiling speaker


Straight Horn speaker
Explosion proof horn speaker


Straight Horn speaker
Straight Horn Speaker

NX-100 FrontNX-100 Rear

TOA's NX-100 Network Audio adapter

Technical Drawings
Rack Layout
pdf 251Kb
pdf 363Kb
Cable Layout




Emergency Voice Evacuation


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TOA & Trantec Wireless Microphones

Ampetronic Induction Loop Systems for the hearing impaired. Contact a sales person in your region now for more information and pricing.




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