Metering Units
WF Energy Controls has oil-insulated Metering and/or Protection units containing both current and voltage transformers in single or three phase combinations up to 36kV
Our units can either be pole or ground mounted. They are custom designed as a convenient and cost effective means of installing metering class CTs and VTs into a power supply network.
Our oil-filled units can be supplied for 3.6kV, 7.2kV, 12kV, 24kV and 36kV standard systems. Various configurations can be supplied on request. In addition, dual protection and metering functions can be accommodated within the same unit.
Enclosure:
All enclosures are self-draining and available in the following finishes:
- 316 grade stainless steel
- Hot dip galvanised mild steel
- Arc Zinc coated with paint finish
- Powder coated Mild steel
Our units come standard with lifting lugs, oil level sight gauge, earth lug, oil filling bung and drain gate valve. All LV connections are brought out into an IP65 secondary terminal box.
Location:
Our units can be designed for both indoor and outdoor environments.
Current Transformers:
These units can accommodate up to three CTs per phase. Single or multiple ratios are available.
Voltage Transformers:
All VTs are single phase units. (Five limb 3ø equivalent)
VTs are connected YNynO with an optional open delta additional secondary. The high voltage star point is brought outside the tank via a 3.6kV bushing and earthed via a removable link.
Class:
A full range of metering and protection CT and VT classes is available.
Mounting:
Ground or pole mounted. These include base securing and pole hanger brackets.
Terminations
Primary:
Palm terminals on porcelain bushings or cable terminations.
Secondary:
A sealable, weatherproof (IP65) terminal box complete with gland plate, Klippon SAK 6N terminals and HRC fuses.
Protection:
Low voltage HRC secondary fuses are standard. Under oil high voltage primary fuses are available on request.
Testing:
Designed and manufactured to IEC or AS standards. All Units are tested in the WF Energy Controls’ high voltage Test Laboratory. Final Calibration is performed by the installer.
