Meter station installation
This table provides documents which give guidance on the wiring of meter stations for common situations. It does not cover high voltage metering.
Table of metering diagrams (without distributed generation)
- Single phase metering without controlled Phase
- Single phase metering with controlled Phase
- Installation with 2 or 3 ICP’s. 3 phase service and combined meter board.
- Installation with more than 3 ICP’s. Three phase service and combined meter board.
- 3 Phase supply with 2 uncontrolled phases and one controlled phase.
- 2 Phase supply with 2 uncontrolled phases and controlled Phase.
- 3 Phase supply with one controlled Phase.
- 3 Phase supply with 3 phase controlled Phases.
- Installation with up to 3 ICP’s. 3 phase and single phase ICPs with and without controlled phases.
- Standard connection for 230/400V, 3 phase 4 wire CT meter installation & test block.
- Single phase day/night dual tariff
- 3 phase day/night dual tariff (school special)
- Single phase temporary builders supply
- Single phase metering (pre paid controller “esmart”) without controlled phase
- Single phase metering (pre paid controller “esmart”) without controlled phase (ripple receiver)
- Single phase metering (pre paid controller “esmart”) with controlled phase (with pilot wire and contactor)
- Dual single phase metering with controlled phase
- Electrical Boundaries
Table of metering diagrams (with distributed generation)
- Single phase metering without controlled phase for distributed generation
- Single phase metering with controlled phase for distributed generation
- 3 Phase supply with 2 24-hour phases and one controller phase for distributed generation
- 2 Phase supply with 2 24-hour phases & one controlled phase for distributed generation
Typical equipment dimensions
|Equipment||Length (mm)||Width (mm)||Depth (mm)|
|Single phase meter – short terminal cover||170||120||120|
|Single phase meter – long terminal cover||220||120||120|
|3 phase whole current meter– short terminal cover||170||170||65|
|3 phase whole current meter– long terminal cover||245||170||65|
|3 phase CT meter– short terminal cover||220||150||75|
|3 phase CT meter– long terminal cover||260||150||75|
|Ripple Receiver (standard)||175||110||75|
|Ripple Receiver (narrow)||230||85||80|
|* Ripple Control Contractor||160||75||65|
Esmart controller (owned by retailer)
Refer to Retailer for dimensions
- The diagrams apply only to Northpower owned metering equipment (includes ripple receiver contactor).
- Northpower will supply a controlled supply to a maximum rating 2A. If a load greater than 2A is controlled, eg spa pool, the customer is required to fit an auxilary contactor.
- Equipment and wiring must have adequate load and fault ratings.
- The colours used in the diagrams are to distinguish between different phases, neutral and earthing conductors. The colour of the wiring should comply with AS/NZS 3000 rather than the diagrams.
- Approval of non standard arrangements should be referred to Northpower’s Network Planning Department.
- These diagrams apply to new meter stations or meter stations that are being significantly upgraded. Excludes meter replacement. Note: where a ripple receiver or contactor is replaced on a planned basis, an HRC or MCB should be installed, if there is none.
- For controlled options refer to Northpower's tariff options.
CT: Current Transformer
HRC: High Rupture Current
ICP: Individual Connection Point
MCB: Miniature Circuit Breaker
RCD: Residual Current Device
Also see Design of Metering in our Services Section.