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LV Current Transformers/Extended Range Current Transformer
Model: ROS-A SERIES
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.
About the Product
Resin-insulated current transformers ROS-A Series, designed for billing purposes and suited to power systems of 600V (max.), offer revenue metering of at least a Class 0.3 Accuracy and can be used for indoor application or in an outdoor enclosure. Current Ratios available are from 100:5A to 800:5A, and window diameter options are 38mm, 66mm, and 78mm. ROS-A Series current transformers of the Standard Specifications have an RF of up to 4.0. Those of the ERCT Specifications are able to maintain the rated accuracy and burden rating while measuring 1% ~ 150% of the rated current, surpassing the usual metering-class requirement (5% ~ 100%). All ROS-A Series current transformers have been type-tested by CIC’s Advanced Electricity Lab, a testing facility accredited by a member of ILAC.
Product Features
- Standards: IEEE C57.13
- Secondary side equipped with a short-circuiting device
- Terminal cover provided for the secondary side
- Sealable
- Application: Indoors/outdoor
- Rated Voltage: Up to 0.72 kV
- Frequency: 50 or 60 Hz
- Accuracy & Burden: 0.15S or 0.3; B0.1~B0.5
- Window: 38mm, 66mm, 78mm
- Type-tested by a laboratory accredited by an ILAC member
- Additional specification or customization may be requested to comply with various electrical standards and client requirements
Cross-reference: ABB CMF-S; GE JAK-0S; Ritz DCCW/B.
LV Zero-Phase Current Transformers (ZCT)
Model: EZ SERIES
Designed to protect the power system against leakage and earth faults, these zero-phase current transformers (ZCT) come in various window diameters. Epoxy-cast coil.
About the Product
These zero-phase molded current transformers protect the power system against leakage and earth faults. Each of these current transformers has an insulation level of 0.72 kV and requires a suitably insulated primary conductor. When the leakage current at the CT primary reaches a certain level, the CT secondary provides the necessary current signal or voltage signal – according to the type of protective relay in use – for the protection of the power system. EZ Series products are available in various window diameters.
Specifications
- Standards: JEC, IEC or IEEE
- Indoor application
- For a grounded or ungrounded system (see table below)
- Insulation: Araldite® epoxy resin
- Insulation Level: 0.72 kV
- Frequency: 50 or 60 Hz
- Primary current: 200mA, 50~750A
- Secondary current: 1.5mA, 5A, 1A
- Accuracy & Burden: Please check with the sales team
- Other standards and specifications available upon request
MV Coil Molded Current Transformer with Cut Core
Model: EW-10SH
Cut-core, medium-voltage, indoor-use, coil molded current transformer intended for a 12kV (max.) power system and suited for measuring or monitoring instruments. Insulated with Araldite® epoxy resin.
About the Product
Intended for a 12kV (max.) power system and suited for measuring or monitoring instruments, this coil molded current transformer with a cut core is insulated with Araldite® epoxy resin. With a fine exterior, this medium-voltage current transformer for indoor use is compact and easy to install.
Specifications
- Standard: IEC or IEEE*
- Indoor application
- Coil molded
- High-grade silicon steel core
- System Voltage: ≦ 12 kV
- Frequency: 50 or 60 Hz
- Primary current: 10~400A
- Secondary current: 5A, 1A
- Accuracy & Burden: Please check with the sales team
- Other standards and specifications available upon request
MV Block Type Epoxy-Cast Resin Current Transformers
Model: EWF-DA/DB/DD/DE/DS
For use in conjunction with energy meters or protective relays. Available in single-core, 2-core, and 3-core models. Insulated with Araldite® epoxy resin. Custom-made to meet various requirements.
About the Product
These indoor-use, epoxy-cast current transformers for 20~24kV power systems are designed to be used with energy meters or protective relays. Available in single-core, two-core, and three-core models, these CTs can be custom-made to meet various specification requirements (e.g. burden and accuracy) and electrical standards (e.g. IEC, IEEE). Special designs and features may also be requested. Insulated with Araldite® epoxy resin, these products are characterized by a high level of moisture resistance, electrical performance, and mechanical strength. These general-use current transformers have been distributed to various countries for 30 years and have consistently met with outstanding customer satisfaction.
Specifications
- Standard: IEC or IEEE*
- Indoor application
- Coil molded
- High-grade silicon steel core
- System Voltage: ≦ 36 kV
- Frequency: 50 or 60 Hz
- Primary current: 10~3000A
- Secondary current: 5A, 1A
- Accuracy & Burden: Please check with the sales team
- Core: 1, 2, or 3 cores
- Other standards and specifications available upon request
MV Outdoor Current Transformers for Billing
Model: AWF SERIES
Used for power monitoring or as part of an MOF (Metering Outfit) for a 12~36kV power system, these outdoor CTs for billing are insulated with Araldite® UV-resistant cycloaliphatic epoxy. Accuracy 0.15S~0.3; burden B-0.5. Available as Extended Range Current Transformers (ERCTs) if requested.
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.
Specifications
- Standard: IEC or IEEE**
- Outdoor usage; Epoxy-cast type (Cycloaliphatic Resin)
- Coil molded
- System Voltage: ≦ 36 kV
- Frequency: 50 or 60 Hz
- Primary Current: 50～600 A
- Secondary current: 5A, 1A
- Accuracy & Burden: Please check with the sales team
- Core: 1 or 2 cores
- ERCT* available by request
HV Outdoor Current Transformers
Model: AWF-72
Cast in Araldite® UV-resistant cycloaliphatic epoxy resin, this high-voltage (72 kV) outdoor-type current transformer is designed to withstand solar ultraviolet radiation and IEC-defined pollution level III (“Heavy”).
About the Product
Cast in Araldite® UV-resistant cycloaliphatic epoxy resin, this high-voltage (72 kV) outdoor-type current transformer is designed to withstand solar ultraviolet radiation and IEC-defined pollution level III (“Heavy”). This HV current transformer maintains its excellent electrical properties even amidst long-term exposure to salt fog, high temperature, and high humidity.
Specifications
- Standard: IEC (other standards by request)
- Voltage Rating: 72.5 kV
- Rated Frequency: 50 or 60Hz
- Primary Current: 50～1200 A
- Secondary current: 5A, 1A
- Accuracy & Burden: Please check with the sales team
- Core: 1 or 2 cores
- Power-Frequency Withstand Voltage: 140 kV/1min
- Lightning Impulse Voltage (1.2/50 μs): 325 kV
- Wet Flashover Voltage: 180 kV
- Dry Flashover Voltage: 225 kV
- Creepage Distance: >1890 mm