Current Transformers / Extended Range Current Transformers (ERCTs) for Billing, 10~30kV Outdoor Type
About the Product
Intended for 12, 24, or 36 kV power systems, these outdoor-use current transformers for billing are insulated with Araldite® UV-resistant cycloaliphatic epoxy resin. Able to withstand solar ultraviolet radiation without deterioration in electrical performance, these current transformers are suited to long-term outdoor usage. The AWF Series products have been supplied to power companies in numerous countries of tropical maritime climate, where these current transformers have been exposed to high moisture and salt spray for more than 20 years while continuing to function with stable quality.
The AWF Series current transformers are available in various classes of accuracy (0.15S, 0.15, 0.2S, 0.2, and 0.3) and have a burden rating of B-0.5. In addition, they can be offered as Extended Range Current Transformers (ERCT)* if requested by the customer.
The AWF Series current transformers can be used for power monitoring or as part of an MOF (Metering Outfit) for a 12~36kV power system.
- Standard: IEC or IEEE**
- Outdoor usage; Epoxy-cast type (Cycloaliphatic Resin)
- Frequency: 50 or 60 Hz
- System Voltage: 12~36 kV
- Rated Primary Current: 50～600 A
- ERCT* available by request
* The ERCT specifications enable the CT to maintain its rated accuracy and burden rating while measuring 1%~150% (or even 400%) of its rated current, surpassing the usual metering-class requirement (5%~100%).
** Other standards and specifications available.
AWF-12, AWF-24, AWF-24-1, AWF-24-2, AWF-24-3, AWF-36-1
- Related Products
Suited to ≤ 36kV power systems, these multi-ratio current transformers are available in 2-core and 3-core options. Insulated with Araldite® epoxy and intended to work with measuring or monitoring instruments, or with protective relays.
Cast in Araldite® UV-resistant cycloaliphatic epoxy resin, these medium-voltage potential transformers for billing are designed for long-term outdoor use in harsh conditions such as solar ultraviolet radiation, salt fog, high temperature, and high humidity. Designed to be part of a Metering Outfit (MOF).
Low-Voltage Current Transformers / Extended Range Current Transformers (ERCTs) for Billing, Window-Type
For 600V (max.) power systems, these current transformers offer a 0.3 Metering Class accuracy. ERCT specifications also available. Secondary side includes a short-circuiting device. Terminal cover sealable. Various window diameters and current ratios.
Intended for power companies, this indoor single-phase epoxy-cast potential transformer is designed to be mounted inside the SF6 gas-insulated MOF (Metering Outfit) panel of a 25.5 kV (max.) power system. With an added tap in the secondary winding, this PT can offer two voltage ratios (120/60:1).
Indoor-use potential transformers for 36kV (max.) power systems. IEC type testing & environmental testing (-45℃~65℃). The choice of major corporations of numerous countries. Insulated with Araldite® epoxy resin. Superior moisture resistance.
For power companies. To be mounted inside the SF6 gas-insulated MOF panel of a 25.5 kV (max) power system. With 2 primary coils, this current transformer offers 2 current ratios while maintaining the required accuracy and burden rating at each current ratio. Insulated with Araldite® epoxy resin.
When a power system is in operation, it is imperative that the secondary of the current transformer(s) should not have an open circuit. When an open circuit occurs, an extremely high transient voltage will be induced, which can in turn damage the current transformers and the instruments at the secondary, or even posing a threat to personal safety. This CT secondary overvoltage protector offers protection from such accidental damage caused by secondary transient voltage.
- Download Materials
Easy-to-print document, containing product description, specifications, and a selection table.
How to select, based on application and power system attributes, the primary and secondary currents, burden, accuracy, rated frequency, type (indoor vs. outdoor), insulation material, etc.