MAINS PARALLELING PANELS

 

Under the Electric Lighting (Clauses) Act 1899, a person or company having its own generating plant was permitted to operate generators in parallel with Electricity board networks. However, it was not until the Energy Act 1983 that such persons or companies had the right to use the public system to transmit electricity from one location to another. It is now a requirement of Regulation 26 of the Electricity Supply Regulations 1988 that any generator that can be connected in parallel with the Electricity Boards network must comply to the requirements of schedule 3 part II of those regulations.

Mertech’s Mains Paralleling Panels offer the Electrical control and hardware to allow the connection of a private generator to the Electricity Boards network as specified in the regulations. The standard panels described here are for connection of single generators at voltages upto 440V 3 or 4 wire 50 Hz. Although Mertech supply the Generator Protection and hardware there are many other requirements regarding the Electricity Boards earthing, approval procedures, safety procedures and testing etc. that will need to be addressed. We therefore recommend that the regulations be read carefully and discussions with your local authorities take place before proceeding.

                  

The Mertech standard range of Mains Parallling Panels are manufactured from 2mm Zintec mild steel and finished beige stove enameled. The panels are designed to BS 5486 part1 with HDHC copper busbars braced for the available fault level,. ASTA certified bars at 50kA/1sec are available if required. All busbars are 4 Pole with a half rated neutral.

The standard panels are offered with Moulded Case Circuit Breakers (MCCB’s) upto 1600 Amps and Air Circuit Breakers from 2000 Amps to 5000 Amps. All circuit breakers are T.P. A neutral connection is available alongside the Circuit breaker.
Each Generator incomer is fitted with an Automatic Start Module Ref MS503 which provides full engine start & stop controls
Off
Auto
Manual
with monitoring of
Low Oil Pressure
High Engine Temperature
Overcrank
Overspeed
Failed to Start
Alternator Fault
with functions for
D.C.Supply
Engine Running
Engine Cranking
See “Generator Control Modules” data sheet for further information.
Protection for the Generator is offered by the following
Overcurrent
Short Circuit
Reverse Power
G59 Protection is offered by the following
Mains Failure Detection
Over/Under Frequency
over/Under Voltage
Earth Fault
Instrumentation fitted as standard indicates the followowing
Volts, Amps, Frequency
Kilowatts, KVA,KVAr
Power Factor & kWhr’s
Other system controls include
Check Synch Relay
Load Sensor
control fuses
Current transformers